Polyphenylene sulfide resin composition and hollow forming products using the same

Abstract

A polyphenylene sulfide resin composition includes a polyphenylene sulfide resin (A), an amino group-containing compound (B), an epoxy group-containing elastomer (C), wherein the polyphenylene sulfide resin (A) forms a continuous phase and the amino group-containing compound (B) and the epoxy group-containing elastomer (C) form a dispersed phase in the morphology of a forming product composed of the resin composition observed with a transmission electron microscope, and the modulus of elongation (the elastic modulus determined by performing a tensile test on an ASTM type 1 dumbbell test piece obtained by injection molding at a cylinder temperature of 300 C. and at a mold temperature of 150 C., under the conditions in which the distance between chucks is 114 mm, the test piece distance is 100 mm, and the elongation rate is 10 mm/min) of the resin composition is 1.0 MPa or more and 1000 MPa or less.

Claims

1. A polyphenylene sulfide resin composition comprising a polyphenylene sulfide resin (A), an amino group-containing compound (B), and an epoxy group-containing elastomer (C), wherein said polyphenylene sulfide resin (A) forms a continuous phase consisting of polyphenylene sulfide resin (A) and optionally a compatibilizer and said amino group-containing compound (B) and said epoxy group-containing elastomer (C) form a dispersed phase in a morphology of a forming product composed of said resin composition observed with a transmission electron microscope, and a modulus of elongation, the elastic modulus determined by performing a tensile test on an ASTM type 1 dumbbell test piece obtained by injection molding at a cylinder temperature of 300 C. and at a mold temperature of 150 C., under the conditions in which the distance between chucks is 114 mm, the test piece distance is 100 mm, and the elongation rate is 10 mm/min, of said resin composition is 1.0 MPa or more and 1000 MPa or less, wherein said amino group-containing compound (B) is a polyamide resin.

2. The polyphenylene sulfide resin composition according to claim 1, comprising 0.01 to 200 parts by weight of said amino group-containing compound (B) and 1 to 200 parts by weight of said epoxy group-containing elastomer (C) based on 100 parts by weight of said polyphenylene sulfide resin (A).

3. The polyphenylene sulfide resin composition according to claim 1, wherein said epoxy group-containing elastomer (C) is more than 30% by weight and 70% by weight or less when the total of said polyphenylene sulfide resin (A), said amino group-containing compound (B), and said epoxy group-containing elastomer (C) is 100% by weight.

4. The polyphenylene sulfide resin composition according to claim 1, further comprising an elastomer (D) not containing a functional group in an amount such that the total amount of said elastomer (D) and said epoxy group-containing elastomer (C) is 200 parts by weight or less based on 100 parts by weight of said polyphenylene sulfide resin (A).

5. The polyphenylene sulfide resin composition according to claim 1, wherein said amino group-containing compound (B) forms a secondary dispersed phase in said dispersed phase of said epoxy group-containing elastomer (C).

6. The polyphenylene sulfide resin composition according to claim 1, which is a polyphenylene sulfide resin composition for an intake duct that contacts exhaust condensation water of an internal combustion engine.

7. A forming product composed of said polyphenylene sulfide resin composition according to claim 1.

8. The forming product according to claim 7, which is hollow.

9. A duct that contacts exhaust condensation water of an internal combustion engine comprising the forming product according to claim 8.

10. The duct according to claim 9, which is an intake duct.

11. The duct according to claim 9, which is an intake duct for a forced induction engine.

12. The duct according to claim 9, which is an intake duct for a forced induction engine that connects a turbocharger or a supercharger and an intercooler.

Description

EXAMPLES

(1) The effect of the present invention is explained in detail below by way of Examples, but the present invention is not limited to these Examples. Basic evaluations in each Example and Comparative Example were carried out in the following methods.

(2) (1) Injection Molding

(3) From a pellet obtained from each Example and Comparative Example, an ASTM type 1 dumbbell test piece was obtained by injection molding at a cylinder temperature of 300 C. and at a mold temperature of 150 C., using an injection molding machine SE75-DUZ manufactured by Sumitomo Heavy Industries, Ltd.

(4) (2) The Initial Tensile Property at 23 C.

(5) The ASTM type 1 dumbbell obtained by injection molding as described above was evaluated for its tensile property under the conditions in which the distance between chucks was 114 mm, the test piece distance was 100 mm, the elongation rate was 10 mm/min, using a Tensilon UTA2.5T tensile testing machine under the condition of 23 C.

(6) (3) The Tensile Property at 23 C. Followed by the Durability Treatment Under the Conditions of 170 C.700 hr

(7) The ASTM type 1 dumbbell obtained by injection molding as described above was treated in a PHH202 hot air dryer (manufactured by ESPEC CORP.) heated at 170 C. for 700 hr, and then allowed to cool at room temperature for 24 hr.

(8) Then, the dumbbell after the treatment was evaluated for its tensile property under the conditions in which the distance between chucks was 114 mm, the test piece distance was 100 mm, the elongation rate was 10 mm/min, using a Tensilon UTA2.5T tensile testing machine under the condition of 23 C.

(9) (4) The Tensile Property at 23 C. Followed by the Immersion Treatment in Exhaust Condensation Water

(10) The ASTM type 1 dumbbell obtained by injection molding as described above was completely immersed in a liquid imitating the exhaust condensation water (pH3, Cl.sup.: about 300 ppm, NO.sub.2.sup.: about 400 ppm, NO.sub.3: about 400 ppm, SO.sub.3.sup.: about 300 ppm, SO.sub.4.sup.2: about 1300 ppm, HCHO: about 400 ppm, HCOOH: about 400 ppm, CH.sub.3COOH: about 2000 ppm) under the conditions of 80 C.12 hr, and a cycle of drying under conditions of 150 C.12 hr was repeated 5 times.

(11) Then, the dumbbell after the treatment was evaluated for its tensile property under the conditions in which the distance between chucks was 114 mm, the test piece distance was 100 mm, the elongation rate was 10 mm/min, using a Tensilon UTA2.5T tensile testing machine under the condition of 23 C.

(12) (5) The Number-Average Dispersion Particle Diameter of the Dispersed Phase and the Secondary Dispersed Phase of the Dispersed Phase

(13) The ASTM type 1 dumbbell test piece obtained by injection molding as described above was cut at its center portion in a direction perpendicular to the flow direction of the resin, and then a thin piece of 0.1 m or less was cut out from the center portion of the cross section at 20 C., using an ultramicrotome. After that, a sample stained with ruthenium tetroxide and an unstained sample were prepared. These samples were observed by a H-7100 type transmission electron microscope manufactured by Hitachi, Ltd. (resolution (particle image) of 0.38 nm, magnification a of 500,000 to 600,000 times), and arbitrarily different 10 sites were photographed with the magnification of 1000 to 10000 times. Using an image analysis software Scion Image manufactured by Scion Corporation, 10 different dispersed particles for each component present in the electron microscope images were arbitrarily selected, and the longest diameter and the shortest diameter for each dispersed phase was determined, and their average values were calculated as a number-average dispersion particle diameter. The components of the dispersed particles were identified by comparing the contrast difference in the unstained phase and the contrast difference in the phase stained with ruthenium tetroxide.

(14) (6) Measurement of the Melt Viscosity

(15) A pellet obtained from each Example and Comparative Example was measured under the conditions in which the test temperature was 300 C., the shear rate was 1216/s, the capillary length was 10 mm, and the capillary diameter was 1 mm, using Capilograph manufactured by TOYO SEIKI SEISAKU-SHO, LTD.

(16) (7) Pressure Repetition Test

(17) A pellet obtained from each Example and Comparative Example was subjected to a direct blow molding machine, and a hollow forming object having a thickness of 3 mm, a of 80 mm, and a length of 400 mm was molded under the conditions of a cylinder temperature of 300 C. and a mold temperature of 120 C. This hollow forming object was treated in a PHH202 hot air dryer (manufactured by ESPEC CORP.) heated at 170 C. for 700 hr, and then allowed to cool at room temperature for 24 hr. Compressed air was introduced to apply pressure so that the internal pressure would raise from 0 kPa to 200 kPa, and after this manipulation was repeated 1000 times, the evaluation was carried out as follows, depending on the number of times a pressure leak occurred.

(18) Excellent: no pressure leak

(19) Good: 500 times or more to less than 1000 times

(20) Bad: less than 500 times

(21) Raw materials used in each Example and Comparative Example are shown in Reference Examples as follows.

[Reference Example 1] PPS Resin (A): A-1

(22) A 70-liter autoclave equipped with a stirrer was charged with 8267.37 g (70.00 mol) of 47.5% sodium hydrosulfide, 2957.21 g (70.97 mol) of 96% sodium hydroxide, 11434.50 g (115.50 mol) of N-methyl-2-pyrrolidone (NMP), 2583.00 g (31.50 mol) of sodium acetate, and 10500 g of ion exchange water, and the resulting mixture was gradually heated to 245 C. over about 3 hours while passing nitrogen under normal pressure, and after 14780.1 g of water and 280 g of NMP were distilled out, the reaction vessel was cooled to 160 C. The amount of the residual moisture in the system per 1 mol of the charged alkali metal sulfide was 1.06 mol including the moisture consumed for the hydrolysis of NMP. Further, the amount of scattered hydrogen sulfide was 0.02 mol per 1 mol of the charged alkali metal sulfide.

(23) Then, 10235.46 g (69.63 mol) of p-dichlorobenzene and 9009.00 g (91.00 mol) of NMP were added, and the reaction vessel was sealed under a nitrogen gas and heated to the temperature of 238 C. at the rate of 0.6 C./min while stirring at 240 rpm. After the reaction at 238 C. for 95 minutes, the temperature was raised to 270 C. at the rate of 0.8 C./min. After the reaction at 270 C. for 100 minutes, 1260 g (70 mol) of water was injected over 15 minutes to cool the mixture to 250 C. at the rate of 1.3 C./min. After that, the mixture was cooled to 200 C. at the rate of 1.0 C./min and then cooled rapidly to about a room temperature.

(24) The content was taken out and diluted with 26300 g of NMP. The solvent and the solid were filtered off with a sieve (80 mesh), and the resulting particles were washed with 31900 g of NMP and filtered. The resulting particles were washed several times with 56000 g of ion exchange water, filtered off washed with 70000 g of a 0.05% by weight aqueous solution of acetic acid, and filtered. After washing with 70000 g of ion exchange water and filtration, the resulting water-containing PPS particles were dried with hot air at 80 C. and dried at 120 C. under reduced pressure. The resulting A-1 had a melt viscosity of 200 Pa.Math.s (310 C., shear rate of 1000/s).

[Reference Example 2] The Amino Group-Containing Compound (B): B-1

(25) Commercially available nylon 12 (manufactured by Arkema S.A., Rilsamid AESNO TL) was used.

[Reference Example 3] The Amino Group-Containing Compound (B): B-2

(26) Commercially available nylon 610 (manufactured by Toray Industries, Inc., Amilan CM2021) was used.

[Reference Example 4] The Amino Group-Containing Compound (B): B-3

(27) Commercially available poly(etherimide-siloxane) block copolymer (manufactured by Saudi Basic Industries Corporation Innovative Plastics, SILTEM 1500) was used.

[Reference Example 5] The Functional Group-Containing Elastomer (C): C-1

(28) Commercially available ethylene and glycidyl methacrylate copolymer (manufactured by Sumitomo Chemical Company, Limited, BONDFAST 7M) was used.

[Reference Example 6] The Elastomer Containing a Functional Group Different than an Epoxy Group (C): C-1

(29) Commercially available maleic anhydride modified ethylene and 1-butene copolymer (manufactured by Mitsui Chemicals Inc., TAFMER MH5020) was used.

[Reference Example 7] The Elastomer (D) not Containing a Functional Group: D-1

(30) Commercially available ethylene and 1-butene copolymer (manufactured by Mitsui Chemicals Inc., TAFMER TX-610) was used.

[Reference Example 8] The Compatibilizing Agent (E): E-1

(31) As a silane coupling agent having an isocyanate group, 3-isocyanate propyltriethoxysilane (manufactured by Shin-Etsu Chemical Co., Ltd., KBE-9007) was used.

Examples 1 to 7, Comparative Examples 1 to 4, 6 and 7

(32) The raw materials shown in Tables 1, 2 and 3 were dry blended in the proportion shown in Tables 1, 2 and 3 and were subjected to melt kneading at a cylinder temperature of 230 C. and at a screw rotation speed of 300 rpm, using a TEX 30 type twin screw extruder (manufactured by The Japan Steel Works Ltd., L/D=45, 3 kneading portions, the proportion of the screw having a notch portion of 10%) equipped with a vacuum vent (kneading method: a), and then pelletized with a strand cutter. A pellet was dried overnight at 130 C., subjected to injection molding according to the method as described above, and then evaluated for various physical properties. In addition, a pellet which was dried overnight at 130 C. was subjected to direct blow molding according to the method as described above, and then the pressure repetition test was performed.

Comparative Example 5

(33) The raw materials shown in Table 3 were dry blended in the proportion shown in Table 3 and were subjected to melt kneading at a cylinder temperature of 280 C. and at a screw rotation speed of 300 rpm, using a TEX 30a type twin screw extruder (manufactured by The Japan Steel Works Ltd., L/D=45, 3 kneading portions, the proportion of the screw having a notch portion of 0%) equipped with a vacuum vent (kneading method: b), and then pelletized with a strand cutter. The pellet was dried overnight at 130 C., subjected to injection molding according to the method as described above, and then evaluated for various physical properties. In addition, a pellet which was dried overnight at 130 C. was subjected to direct blow molding according to the method as described above, and then the pressure repetition test was performed.

[Comparative Example 8] (the Method Described in Patent Document 5)

(34) To 100 parts by weight of the polyphenylene sulfide resin (A-1), 6 parts by weight of the functional group-containing elastomer (C-1) and 20 parts by weight of the elastomer (D-1) not containing a functional group were added and mixed, and using a TEX 30a type twin screw extruder (manufactured by The Japan Steel Works Ltd., L/D=45, 3 kneading portions, the proportion of the screw having a notch portion of 10%) equipped with a vacuum vent (kneading method: a), the resulting mixture was subjected to melt kneading at a cylinder temperature of 280 C. and at a screw rotation speed of 300 rpm, and then pelletized with a strand cutter. The modified polyphenylene sulfide resin thus produced is considered as A-1.

(35) Then, to 126 parts by weight of the modified polyphenylene sulfide resin (A-1), 50 parts by weight of the polyamide resin (B-1) and 24 parts by weight of the elastomer containing another functional group (C-1) were added and mixed, and using a TEX 30a type twin screw extruder (manufactured by The Japan Steel Works Ltd., L/D=45, 3 kneading portions, the proportion of the screw having a notch portion of 10%) equipped with a vacuum vent (kneading method: a), the resulting mixture was subjected to melt kneading at a cylinder temperature of 280 C. and at a screw rotation speed of 300 rpm, and then pelletized with a strand cutter. The resin composition obtained in the end was a result of blending each raw material shown in Table 3 in the blending amount shown in Table 3. A pellet was dried overnight at 130 C., subjected to injection molding according to the method as described above, and then evaluated for various physical properties. In addition, a pellet which was dried overnight at 130 C. was subjected to direct blow molding according to the method as described above, and then the pressure repetition test was performed.

[Comparative Example 9] (the Method Described in Patent Document 3)

(36) To 100 parts by weight of the polyphenylene sulfide resin (A-1), 18 parts by weight of the functional group-containing elastomer (C-1) and 22 parts by weight of the elastomer (D-1) not containing a functional group were added and mixed, and using a TEX 30a type twin screw extruder (manufactured by The Japan Steel Works Ltd., L/D=45, 3 kneading portions, the proportion of the screw having a notch portion of 10%) equipped with a vacuum vent (kneading method a), the resulting mixture was subjected to melt kneading at a cylinder temperature of 280 C. and at a screw rotation speed of 300 rpm, and then pelletized with a strand cutter. The modified polyphenylene sulfide resin thus produced is considered as A-2.

(37) Then, to 44 parts by weight of the polyamide resin (B-1), 37 parts by weight of the elastomer containing another functional group (C-1) was added and mixed, and using a TEX 30a type twin screw extruder (manufactured by The Japan Steel Works Ltd., L/D=45, 3 kneading portions, the proportion of the screw having a notch portion of 10%) equipped with a vacuum vent (kneading method: a), the resulting mixture was subjected to melt kneading at a cylinder temperature of 250 C. and at a screw rotation speed of 300 rpm, and then pelletized with a strand cutter. The modified polyamide resin thus produced is considered as B-1.

(38) The modified polyphenylene sulfide resin (A-2) and the modified polyamide resin (B-1) were dry blended in the composition shown in Table 3 and were subjected to melt kneading at a cylinder temperature of 280 C. and at a screw rotation speed of 300 rpm, using a TEX 30a type twin screw extruder (manufactured by The Japan Steel Works Ltd., L/D=45, 3 kneading portions, the proportion of the screw having a notch portion of 10%) equipped with a vacuum vent (kneading method: a), and then pelletized with a strand cutter. The resin composition obtained in the end was a result of blending each raw material shown in Table 3 in the blending amount shown in Table 3. A pellet was dried overnight at 130 C., subjected to injection molding according to the method as described above, and then evaluated for various physical properties. In addition, a pellet which was dried overnight at 130 C. was subjected to direct blow molding according to the method as described above, and then the pressure repetition test was performed.

(39) TABLE-US-00001 TABLE 1 Comparative Comparative Comparative Comparative Exam- Exam- Exam- Exam- ple 1 ple 2 ple 3 ple 4 Composition Polyphenylene sulfide (A) Kind A-1 A-1 A-1 A-1 Parts by weight 100 100 100 100 Amino group-containing compound (B) Polyamide Kind B-1 Parts by weight 54 Polyetherimide Kind siloxane copolymer Parts by weight Epoxy group-containing elastomer (C) Kind C-1 C-1 C-1 Parts by weight 32 54 78 Elastomer containing a functional Kind group different than an epoxy group (C) Parts by weight Elastomer which does not contain a functional group (D) Kind Parts by weight Compatibilizing agent (E) Kind Parts by weight % by weight of the total amount of (C) and (D) % by weight 24 35 44 when the total from (A) to (D) is 100% by weight Kneading method a a a a Resin processing temperature 305 309 314 302 Evaluation Morphology Continuous Component PPS PPS Elastomer PPS phase Dispersed Number-average nm 450 phase (B) dispersion particle diameter Dispersed Component C C phase (C) Number-average nm 500 600 dispersion particle diameter Secondary Number-average nm dispersed dispersion phase (B) In particle diameter the dispersed phase (C) Physical initial properties Tensile elongation % 27 83 133 91 properties Modulus of MPa 1300 1020 440 1850 elongation Flexural strength MPa 54 36 15 66 Flexural modulus MPa 1490 1070 370 2200 170 C. 700 hr Tensile elongation % 20 31 10 55 Modulus of MPa 1610 1100 400 2100 elongation Flexural strength MPa 58 38 12 68 Flexural modulus MPa 1800 1200 360 2450 After immersion Tensile elongation % 26 81 90 66 in exhaust Modulus of MPa 1300 1030 450 1900 condensation elongation water Flexural strength MPa 54 37 15 67 Flexural modulus MPa 1500 1100 360 2400 Pressure repetition test bad bad bad bad Kneading method a: the proportion of the screw having a notch portion of 10% Kneading method b: No screw having a notch portion

(40) TABLE-US-00002 TABLE 2 Exam- Exam- Exam- Exam- Exam- Exam- Exam- ple 1 ple 2 ple 3 ple 4 ple 5 ple 6 ple 7 Composition Polyphenylene sulfide (A) Kind A-1 A-1 A-1 A-1 A-1 A-1 A-1 Parts by 100 100 100 100 100 100 100 weight Amino Polyamide Kind B-1 B-1 B-1 B-1 B-1 B-2 group-containing Parts by 44 44 44 22 44 44 compound (B) weight Polyetherimide Kind B-3 siloxane copolymer Parts by 44 weight Epoxy group-containing elastomer (C) Kind C-1 C-1 C-1 C-1 C-1 C-1 C-1 Parts by 45 78 55 71 55 77 55 weight Elastomer containing a functional group Kind different than an epoxy group (C) Parts by weight Elastomer which does not contain a functional group (D) Kind D-1 D-1 D-1 D-1 Parts by 22 29 22 22 weight Compatibilizing agent (E) Kind E-1 Parts by 0.8 weight % by weight of the total amount of (C) and (D) % by weight 24 35 35 45 35 35 35 when the total from (A) to (D) is 100% by weight Kneading method a a a a a a a Resin processing temperature 325 320 311 308 325 322 325 Evaluation Melt viscosity Pa .Math. s 450 1140 840 520 1110 1130 660 Morphology Continuous Component PPS PPS PPS PPS PPS PPS PPS phase Dispersed Number-average nm 1500 700 750 1000 500 450 900 phase (B) dispersion particle diameter Dispensed Component C C C C C C C phase (C) Number-average nm 700 600 800 700 800 1000 900 dispersion particle diameter Secondary Number-average nm 600 400 400 500 200 300 300 dispersed dispersion phase (3) in particle diameter the dispersed phase (C) Physical Initial Tensile elongation % 78 125 94 80 132 123 92 properties properties Modulus of MPa 880 570 550 400 530 600 580 elongation Flexural strength MPa 35 27 25 17 25 27 27 Flexural modulus MPa 1030 640 630 500 600 650 640 170 C. 700 hr Tensile elongation % 46 69 70 65 81 74 73 Modulus MPa 890 590 560 450 550 680 700 of elongation Flexural strength MPa 36 29 26 18 28 28 29 Flexural modulus MPa 1080 670 660 530 650 740 770 After Tensile elongation % 76 120 91 69 125 120 85 immersion in Modulus MPa 890 590 560 420 550 680 590 exhaust of elongation Flexural strength MPa 36 28 26 18 26 26 27 condensation Flexural modulus MPa 1080 650 660 510 620 660 670 water Pressure repetition test good excel- excel- excel- excel- excel- excel- lent lent lent lent lent lent Melt viscosity under the conditions of 300 C. and the shear rate of 1216/s Kneading method a: the proportion of the screw having a notch portion of 10% Kneading method b: No screw having a notch portion

(41) TABLE-US-00003 TABLE 3 Comparative Comparative Comparative Comparative Comparative Exam- Exam- Exam- Exam- Exam- ple 5 ple 6 ple 7 ple 8 ple 9 Composition Polyphenylene sulfide (A) Kind A-1 A-1 A-1 A-1 A-1 Parts by 100 100 100 100 100 weight Amino group-containing Polyamide Kind B-1 B-1 B-1 B-1 B-1 compound (B) Parts by 44 44 44 50 44 weight Polyetherimide Kind siloxane Parts by copolymer weight Epoxy group-containing elastomer (C) Kind C-1 C-1 C-1 Parts by 45 6 18 weight Elastomer containing a functional group Kind C-1 C-1 C-1 different than anepoxy group (C) Parts by 78 24 37 weight Elastomer which does not contain Kind D-1 D-1 D-1 a functional group (D) Parts by 78 20 22 weight Compatibilizing agent (E) Kind Parts by weight % by weight of the total amount of (C) and (D) % by weight 24 35 35 25 35 when the total from (A) to (D) is 100% by weight Kneading method b a a a a Resin processing temperature 380 340 334 340 343 Evaluation Melt viscosity Pa .Math. s 280 240 180 300 350 Morphology Continuous Component PPS/PA PPS/Elastomer PA PPS/PA PPS/PA phase bicontinuous bicontinuous bicontinuous bicontinuous Dispersed Number-average nm 2200 2500 4000 2500 phase (B) dispersion particle diameter Dispersed Component C C C C C phase (C) Number-average nm 1400 150 200 300 dispersion particle diameter Secondary Number-average nm 1000 dispersed dispersion phase (B) in the particle diameter dispersed phase (C) Physical initial Tensile elongation % 50 45 48 167 70 properties properties Modulus of MPa 840 520 500 930 620 elongation Flexural strength MPa 35 25 20 42 30 Flexural modulus MPa 1080 600 530 1130 720 170 C. 700 hr Tensile elongation % 15 9 13 31 27 Modulus of MPa 880 700 510 970 640 elongation Flexural strength MPa 38 30 22 41 31 Flexural modulus MPa 1140 750 520 980 770 After immersion Tensile elongation % 24 34 9 50 30 in exhaust Modulus of MPa 850 530 510 970 640 condensation elongation water Flexural strength MPa 27 26 15 34 25 Flexural modulus MPa 1100 610 480 850 700 Pressure repetition test bad bad bad bad bad Melt viscosity under the conditions of 300 C. and the shear rate of 1216/s Kneading method a: the proportion of the screw having a notch portion of 10% Kneading method b: No screw having a notch portion In Comparative Example 9, the production was performed by subjecting the modified PPS resin and modified PA resin to melt kneading

(42) The results of the above Examples and Comparative Examples are compared and explained.

(43) In Comparative Examples 1 and 2, although the polyphenylene sulfide resin (A) formed a continuous phase, the modulus of elongation exceeded 1000 MPa and the flexibility was not sufficient because of the small blending amount of the epoxy group-containing elastomer (C).

(44) In Comparative Example 3, since the blending amount of the epoxy group-containing elastomer (C) was large, the modulus of elongation was low, indicating flexibility. However, since the elastomer formed a continuous phase, the tensile elongation followed by the treatment under the conditions of 170 C.700 h decreased remarkably.

(45) In Comparative Example 4, when polyamide (B) alone was blended as the amino group-containing compound (B), the modulus of elongation exceeded 1000 MPa, and the flexibility was not sufficient.

(46) In Example 1, by subjecting the amino group-containing compound (B) and the epoxy group-containing elastomer (C) to melt kneading, the modulus of elongation was 1000 MPa or less, indicating flexibility, and the polyphenylene sulfide resin (A) formed a continuous phase. Consequently, even after the treatment under the conditions of 170 C.700 h, a relatively high tensile elongation was maintained, and excellent heat aging resistance was shown. At the same time, a high tensile elongation was maintained even after the immersion in the exhaust condensation water. In the pressure repetition test, a pressure leak was observed during the 650th cycle.

(47) On the other hand, in Comparative Example 5, although the melt kneading was performed with the same composition as in Example 1, since a stirring type mixing screw was not used, high shear heating occurred, causing the found value of the resin processing temperature to be as high as 380 C. Consequently, the amino group-containing compound (B) and the epoxy group-containing elastomer (C) reacted with each other excessively and gelated. As a result, the dispersed phase of the amino group-containing compound (B) was separated coarsely, and a bicontinuous structure of the polyphenylene sulfide resin (A) and the amino group-containing compound (B) was formed. As a result, the initial physical properties were relatively good, but the tensile elongation followed by the treatment under the conditions of 170 C.700 h decreased remarkably, and in the pressure repetition test, a pressure leak was observed during the 150th cycle. The decrease in the tensile elongation followed by the immersion in the exhaust condensation water was also observed.

(48) In Examples 2 to 4, when the total of the polyphenylene sulfide resin (A), the amino group-containing compound (B), the epoxy group-containing elastomer (C), and the elastomer (D) not containing a functional group was considered as 100% by weight, the total of the epoxy group-containing elastomer (C) and the elastomer component (D) not containing a functional group was increased to 35 to 45% by weight in comparison with Example 1. Therefore, a significant decrease in the modulus of elongation was observed. On the other hand, since the polyphenylene sulfide resin (A) formed a continuous phase, like in Example 1, the heat aging resistance was also good. As a result, in the pressure repetition test, no pressure leak was observed even after 1000 cycles were carried out. As in Example 1, the chemical resistance was also good.

(49) In Comparative Example 6, the polyphenylene sulfide resin (A), the amino group-containing compound (B), and the elastomer (D) not containing a functional group were subjected to melt kneading. Therefore, a reaction did not occur between the amino group-containing compound (B) and the elastomer (D) not containing a functional group. Consequently, a bicontinuous structure of the polyphenylene resin (A) and the elastomer was observed. As a result, compared with Example 2, the heat aging resistance remarkably decreased, and the decrease in the chemical resistance was also observed.

(50) In Comparative Example 7, the polyphenylene sulfide resin (A), the amino group-containing compound (B), and the maleic anhydride modified elastomer (C-1) were subjected to melt kneading. Although the polyamide resin (B) and the maleic anhydride modified elastomer (C-1) reacted with each other, the effect of increasing the viscosity was not obtained, and as a result, a continuous phase of the amino group-containing compound (B) was formed. Compared with Example 2, the heat aging resistance and the chemical resistance remarkably decreased.

(51) In Example 5, a silane coupling agent was added as a compatibilizing agent. Consequently, the secondary dispersed phase of the amino group-containing compound (B) present in the dispersed phase composed of the epoxy group-containing elastomer (C) had a small number-average dispersion particle diameter, and compared with Example 3, the improvement of the heat aging resistance and the chemical resistance was observed.

(52) In Examples 6 and 7, polyamide 610 (B-2) or a polyetherimide siloxane copolymer (B-3) which was used as the amino group-containing compound (B), and the epoxy group-containing elastomer (C) and the elastomer (D) not containing a functional group were subjected to melt kneading. The polyphenylene sulfide resin (A) formed a continuous phase, and a significant decrease in the modulus of elongation was observed. As a result, in the pressure repetition test, no pressure leak was observed even after 1000 cycles were carried out.

(53) In Comparative Examples 8 and 9, the epoxy group-containing elastomer (C), the maleic anhydride modified elastomer (C-1) and the elastomer (D) not containing a functional group were used in combination and subjected to melt kneading. Consequently, the amino group-containing compound (B) and the maleic anhydride modified elastomer (C-1) reacted with each other preferentially. As a result, the effect of increasing the viscosity was not obtained, and a bicontinuous phase of the polyphenylene sulfide (A) and the amino group-containing compound (B) was formed. As a result, the initial physical properties were relatively good, but the tensile elongation followed by the treatment under the conditions of 170 C.700 h decreased remarkably, and in the pressure repetition test, a pressure leak was observed during the 350th cycle and 440th cycle for each Comparative Example. The decrease in the tensile elongation followed by the immersion in the exhaust condensation water was also observed.