POLYCARBONATE COMPOSITIONS CONTAINING A CARBOXYLIC ACID AND THEIR GLYCEROL OR DIGLYCEROL ESTERS

Abstract

The invention relates to compositions comprising polycarbonate and to a mixture comprising a carboxylic acid and the glycerol and/or diglycerol esters thereof, to the use of the compositions for production of blends or mouldings and to mouldings obtainable therefrom. The compositions have improved rheological and optical properties.

Claims

1.-15. (canceled)

16. A composition comprising A) 20.0 wt % to 99.95 wt % of aromatic polycarbonate and B) 0.05 wt % to 10.0 wt % of a mixture comprising at least one saturated or unsaturated monocarboxylic acid having a chain length of 6 to 30 carbon atoms and at least one ester of this monocarboxylic acid based on glycerol and/or diglycerol.

17. The composition according to claim 16, comprising at least one monocarboxylic acid selected from the group consisting of caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, margaric acid, stearic acid, arachidic acid, behenic acid, lignoceric acid, palmitoleic acid, petroselic acid, oleic acid, elaidic acid, linoleic acid, linolenic acid, arachidonic acid, timnodonic acid and cervonic acid.

18. The composition according to claim 16, wherein component B is a mixture obtainable by partial esterification of glycerol and/or diglycerol with a monocarboxylic acid mixture comprising two or more monocarboxylic acids having a chain length of 6 to 30 carbon atoms.

19. The composition according to claim 18, wherein the monocarboxylic acid mixture comprises oleic acid.

20. The composition according to claim 16, wherein the amount of component B is 0.05 to 1.0 wt %.

21. The composition according to claim 16, wherein the amount of aromatic polycarbonate is at least 75 wt %.

22. The composition according to claim 16, consisting of the following components: A) 87.0 wt % to 99.95 wt % of aromatic polycarbonate, B) 0.05 wt % to 6.0 wt % of the mixture comprising at least one saturated or unsaturated monocarboxylic acid having a chain length of 6 to 30 carbon atoms and at least one ester of this monocarboxylic acid based on glycerol or diglycerol, C) 0.0 wt % to 1.0 wt % of thermal stabilizer and D) 0.0 wt % to 6.0 wt % of one or more further additives from the group of the antioxidants, demoulding agents, flame retardants, UV absorbers, IR absorbers, antistats, optical brighteners, colourants from the group of the organic or inorganic pigments, additives for laser marking and/or impact modifiers.

23. The composition according to claim 16, wherein the composition comprises a thermal stabilizer.

24. The composition according to claim 16, wherein the composition comprises, as component A, one or more copolycarbonates containing the monomer units of the formula (1) ##STR00014## in which R1 is hydrogen or a C1- to C4-alkyl radical, R2 is a C1- to C4-alkyl radical and n is 0, 1, 2 or 3, optionally in combination with a further aromatic homo- or copolycarbonate containing one or more monomer units of the general formula (2) ##STR00015## in which R4 is H or a linear or branched C1- to C10-alkyl radical and R.sup.5 is a linear or branched C.sub.1- to C.sub.10-alkyl radical; where the further homo- or copolycarbonate which is optionally additionally present does not have any monomer units of the formula (1).

25. The composition according to claim 24, wherein the proportion of the monomer units of the formula (1a) in the copolycarbonate is 0.1-88 mol %, based on the sum total of the diphenol monomer units present in the copolycarbonate.

26. The composition according to claim 24, wherein the copolycarbonate containing the monomer units of the formula (1) additionally contains monomer units of the formula (3) ##STR00016## in which R.sup.6 and R.sup.7 are independently H, a C.sub.1- to C.sub.18-alkyl radical, a C.sub.1- to C.sub.18-alkoxy radical, halogen or an in each case optionally substituted aryl or aralkyl radical and Y is a single bond, SO.sub.2-, CO, O, S, a C.sub.1- to C.sub.6-alkylene radical or C.sub.2- to C.sub.5-alkylidene radical, a C.sub.6- to C.sub.12-arylene radical which may optionally be fused to further aromatic rings containing heteroatoms.

27. The composition according to claim 24, wherein the composition comprises, as component A, a blend of the copolycarbonate containing the monomer units of the formula (1) and bisphenol A homopolycarbonate.

28. The composition according to claim 24, wherein the amount of copolycarbonate containing the monomer units of the formula (1) in the composition is at least 3 wt %.

29. A Moulding, extrudate or multilayer system comprising the composition according to claim 16.

30. The moulding according to claim 29, having a wall thickness of less than 3 mm.

Description

EXAMPLES

[0134] 1. Description of Raw Materials and Test Methods

[0135] The polycarbonate compositions described in the following examples were produced by compounding on a Berstorff ZE 25 extruder at a throughput of 10 kg/h. The melting temperature was 275 C.

[0136] Component A-1: Linear polycarbonate based on bisphenol A having a melt volume flow rate MVR of 12.5 cm.sup.3/(10 min) (as per ISO 1133:2012-03, at a test temperature of 300 C. and load 1.2 kg), produced by addition via a side extruder.

[0137] Component A-2: Linear polycarbonate powder based on bisphenol A having a melt volume flow rate MVR of 6 cm.sup.3/(10 min) (as per ISO 1133:2012-03, at a test temperature of 300 C. and load 1.2 kg).

[0138] Component A-3: Copolycarbonate based on bisphenol A and bisphenol TMC having a melt volume flow rate MVR of 18 cm.sup.3/(10 min) (330 C./2.16 kg) and a softening temperature (VST/B 120) of 182 C. from Covestro AG.

[0139] Component A-4: Lexan XHT 2141 from Sabic Innovative Plastics; copolycarbonate based on bisphenol A and bisphenol of the formula (1) where R=phenyl. The MVR is 43 cm.sup.3/10 min (330 C., 2.16 kg); the Vicat temperature (B50) is 160 C.

[0140] Component A-5: Lexan XHT 3141 from Sabic Innovative Plastics; copolycarbonate based on bisphenol A and bisphenol of the formula (I) where R=phenyl. The MVR is 30 cm.sup.3/10 min (330 C., 2.16 kg); the Vicat temperature (B50) is 168 C.

[0141] Component A-6: Copolycarbonate formed from bisphenol A and dihydroxydiphenyl with a melt volume flow rate MVR of 7 cm.sup.3/10 min (330 C., 2.16 kg).

[0142] Component A-7: Linear polycarbonate powder based on bisphenol A having a melt volume flow rate MVR of 9.5 cm.sup.3/(10 min) (as per ISO 1133:2012-03, at a test temperature of 300 C. and load 1.2 kg).

[0143] Component B: Mixture; Palsgaard Polymers PGE 8100 from Palsgaard. This is a mixture comprising the esters glycerol monooleate (about 14 wt %), diglycerol monooleate (about 45 wt %), diglycerol dioleate (about 14 wt %). The amounts of free carboxylic acids in the mixture are about 2 wt % of oleic acid and less than 1 wt % of stearic acid and palmitic acid respectively.

[0144] Component C: triphenylphosphine (TPP) from BASF SE as heat stabilizer.

[0145] Component C-2: Irgafos P-EPQ from BASF SE as thermal stabilizer.

[0146] Component D-1: triisooctyl phosphate (TOF) from Lanxess AG as transesterification stabilizer.

[0147] Component D-2: Paraloid EXL 2300; acrylate-based core-shell impact modifier from Dow Chemical Company.

[0148] Bayblend T65: PC/ABS blend from Covestro Deutschland AG.

[0149] Bayblend FR3030: Flame-retardant PC/ABS blend from Covestro Deutschland AG.

[0150] As a measure of heat resistance, the Vicat softening temperature VST/B50 or VST/B 120 was determined according to ISO 306:2014-3 on 80 mm10 mm4 mm test specimens with a needle load of 50 N and a heating rate of 50 C./h or 120 C./h using a Coesfeld Eco 2920 instrument from Coesfeld Materialtest.

[0151] Melt volume flow rate (MVR) was determined according to ISO 1133:2012-03 (predominantly at a test temperature of 300 C., mass 1.2 kg) using a Zwick 4106 instrument from Zwick Roell. In addition MVR was measured after a preheating time of 20 minutes. This is a measure of melt stability under elevated thermal stress.

[0152] Charpy notched impact strength was measured at room temperature according to ISO 7391-2:2006 on single-side-injected test bars measuring 80 mm10 mm3 mm.

[0153] Charpy impact strength was measured at room temperature according to ISO 7391-2:2006 on single-side-injected test bars measuring 80 mm10 mm3 mm.

[0154] Shear viscosity (melt viscosity) was determined as per ISO 11443:2005 with a Gttfert Visco-Robo 45.00 instrument.

[0155] Tensile modulus of elasticity was measured according to ISO 527-1/-2:1996-04 on single-side-injected dumbbells having a core measuring 80 mm10 mm4 mm.

[0156] Yellowness index (Y.I.) was determined according to ASTM E 313-10 (observer: 10/illuminant: D65) on specimen plaques having a sheet thickness of 4 mm.

[0157] Transmission in the VIS range of the spectrum (400 nm to 800 nm) was determined to ISO 13468-2:22060 on specimen plaques having a sheet thickness of 4 mm.

[0158] Haze was determined to ASTM D1003:2013 on specimen plaques having a sheet thickness of 4 mm.

[0159] Flow path determination by means of a flow spiral: the flow spiral is a cavity arranged in spiral form and having a height of 2 mm and a width of 8 mm, into which the molten mixture is injected at a fixed pressure (here: 1130 bar). The flow paths achieved by the various samples are compared with one another; the longer the better.

[0160] The melt viscosity was measured by the cone-plate method using the MCR 301 rheometer instrument with the CP 25 measurement cone, and the measurement was made according to ISO 11443:2014-04.

[0161] Elongation at break was determined by means of a tensile test according to DIN EN ISO 527-1/-2:1996.

[0162] The specimen plaques were in each case produced by injection moulding at the melt temperatures reported in the tables which follow.

[0163] 2. Compositions

TABLE-US-00001 TABLE 1 Inventive compositions 2 to 6 and comparative example 1 1 Formulation (comp.) 2 3 4 5 6 Component A-1.sup.1) wt % 93 93 93 93 93 93 Component A-2 wt % 7 6.9 6.8 6.6 6.4 6.2 Component B wt % 0.1 0.2 0.4 0.6 0.8 Tests MVR 7/300 C./1.2 kg ml/(10 min) 12.2 14.3 18.4 28.1 39.9 51.6 MVR 20/300 C./1.2 kg ml/(10 min) 12.6 14.3 18.6 29.8 39.7 51.4 Delta MVR 20/MVR7 0.4 0.0 0.2 1.7 0.2 0.2 Vicat VSTB 50 C. 144.8 144.0 143.2 141.3 140.1 137.9 Notched impact resistance at 23 C. kJ/m.sup.2 63z* 63z 65z 64z 61z 62z at 10 C. kJ/m.sup.2 59z 8 61z 2 19s** at 0 C. kJ/m.sup.2 59z 59z 60z 5 57z 2 58z 5 19s 8 17s at 10 C. kJ/m.sup.2 58z 8 57z 3 59z 2 56z 2 57z 15s 2 24s 7 20s 8 17s 8 16s at 20 C. kJ/m.sup.2 7 57z 17s 16s 15s 1 43z 13s 3 21s 9 15s at 30 C. kJ/m.sup.2 17s Optical properties 4 mm, 300 C..sup.2) Transmission % 89.06 89.14 88.92 89.00 88.87 88.97 Haze % 0.53 0.54 0.77 0.7 1.05 0.64 Y.I. 2.64 2.53 2.75 2.71 2.73 2.8 .sup.1)contains 250 ppm of triphenylphosphine as component C; .sup.2)melt temperature in the injection moulding process in the production of the test specimens; *tough; **brittle

[0164] It is apparent from Table I that the inventive polycarbonate compositions 2 to 6 have very good melt stabilities, as shown by the MVR values after a dwell time of 20 minutes. Comparative example 1, which does not contain any component B, by contrast, has much poorer melt volume flow rates MVR than the inventive polycarbonate compositions 2 to 6.

TABLE-US-00002 TABLE 2 Inventive compositions 8 to 10, additionally containing triisooctyl phosphate (D-1), and comparative example 7 Formulation: 7 (comp.) 8 9 10 Component A-1.sup.1) wt % 93 93 93 93 Component A-2 wt % 6.99 6.59 6.39 6.19 Component B wt % 0.4 0.6 0.8 Component D-1 wt % 0.01 0.01 0.01 0.01 Tests MVR 7/300 C./1.2 kg ml/(10 12.0 22.4 42.7 44.6 min) MVR 20/300 C./1.2 kg ml/(10 12.3 24.4 42.3 43.4 min) Delta MVR 20/MVR7 0.3 2.0 0.4 1.2 Vicat VSTB 50 C. 144.9 141.1 138.1 136.3 Notched impact resistance at 23 C. kJ/m.sup.2 65z* 66z 66z 55z at 10 C. kJ/m.sup.2 52z at 0 C. kJ/m.sup.2 59z 59z 14s** at 10 C. kJ/m.sup.2 59z 6x57z 15s 4x18s Impact resistance kJ/m.sup.2 n.f. n.f. n.f. n.f. Optical properties 4 mm, 300 C..sup.2) Transmission % 89.01 89.35 89.23 89.34 Haze % 0.35 0.31 0.42 0.25 Y.I. 2.50 2.34 2.53 2.61 .sup.1)contains 250 ppm of triphenylphosphine as component C; .sup.2)melt temperature in the injection moulding process in the production of the test specimens; n.f.: unfractured (no value, since no fracture); *tough; **brittle

[0165] Inventive compositions 8 to 10 comprising component B show a distinct improvement in the melt volume flow rates MVR over comparative example 7. Surprisingly, in the case of combination with triisooctyl phosphate, the optical properties were also significantly improved, which is reflected in the elevated transmission.

[0166] The inventive polycarbonate compositions 8 to 10 additionally exhibit very good melt stabilities, as shown by MVR values after a dwell time of 20 minutes.

TABLE-US-00003 TABLE 3 Inventive compositions 12 to 14, additionally containing triisooctyl phosphate, and comparative example 11 Formulation: 11 (comp.) 12 13 14 Component A-3.sup.1) wt % 93.00 93.00 93.00 93.00 Component A-2 wt % 7.00 6.89 6.79 6.59 Component B wt % 0.10 0.20 0.40 Component D-1 wt % 0.01 0.01 0.01 Tests: eta.sub.rei for pellets 1.256 1.255 1.254 1.252 MVR 330 C./ ml/(10 17.8 17.2 21.1 44.4 2.16 kg min) Flow spiral (1130 cm 25* 25.5 26.3 29.5 bar) Melt visc. at 300 C. eta 50 Pa .Math. s 1345 1320 1255 1128 eta 100 Pa .Math. s 1272 1252 1195 1081 eta 200 Pa .Math. s 1129 1123 1061 970 eta 500 Pa .Math. s 811 818 772 729 eta 1000 Pa .Math. s 566 571 538 516 eta 1500 Pa .Math. s 447 450 426 410 eta 5000 Pa .Math. s 185 212 170 192 Melt visc. at 320 C. eta 50 Pa .Math. s 756 698 676 513 eta 100 Pa .Math. s 734 676 638 498 eta 200 Pa .Math. s 690 632 596 469 eta 500 Pa .Math. s 549 510 483 394 eta 1000 Pa .Math. s 409 385 366 311 eta 1500 Pa .Math. s 326 311 299 259 eta 5000 Pa .Math. s 150 143 137 123 Melt visc. at 330 C. eta 50 Pa .Math. s 500 456 447 279 eta 100 Pa .Math. s 498 446 438 278 eta 200 Pa .Math. s 474 433 419 277 eta 500 Pa .Math. s 400 370 360 254 eta 1000 Pa .Math. s 316 297 291 219 eta 1500 Pa .Math. s 262 248 244 189 eta 5000 Pa .Math. s 127 121 120 102 Melt visc. at 340 C. eta 50 Pa .Math. s 368 326 305 169 eta 100 Pa .Math. s 365 322 300 168 eta 200 Pa .Math. s 355 313 295 167 eta 500 Pa .Math. s 310 279 263 158 eta 1000 Pa .Math. s 257 232 221 141 eta 1500 Pa .Math. s 219 201 192 131 eta 5000 Pa .Math. s 111 105 101 79 Melt visc. at 360 C. eta 50 Pa .Math. s 199 162 146 66 eta 100 Pa .Math. s 196 159 144 65 eta 200 Pa .Math. s 190 154 140 64 eta 500 Pa .Math. s 178 149 132 62 eta 1000 Pa .Math. s 158 135 121 60 eta 1500 Pa .Math. s 141 122 111 58 eta 5000 Pa .Math. s 84 74 70 45 Vicat VSTB 120 C. 180.9 180.3 178.7 176.6 Tensile properties Yield stress N/mm.sup.2 72 73 74 75 Elongation at yield % 6.8 6.7 6.6 6.5 Ultimate tensile N/mm.sup.2 64 72 70 73 strength Elongation at break % 84 126 118 129 Modulus of N/mm.sup.2 2357 2381 2438 2457 elasticity Optical data 4 mm, 330 C..sup.2) Transmission % 88.94 89.35 89.62 89.64 Haze % 0.44 0.3 0.3 0.28 Y.I. 3.39 2.95 2.63 2.46 .sup.1)contains 250 ppm of triphenylphosphine as component C; .sup.2)melt temperature in the injection moulding process in the production of the test specimens

[0167] Inventive examples 12 to 14 comprising component B and component D, i.e. triisooctyl phosphate, exhibit distinctly reduced melt viscosities compared to comparative example II at all shear rates and temperatures measured. The optical properties of transmission, haze and yellowness index are significantly improved. At the same time, an increase in the modulus of elasticity is found.

TABLE-US-00004 TABLE 4 Inventive examples 16, 17, 19 and 20 and comparative examples 15 and 18 15 18 Formulation: (comp.) 16 17 (comp.) 19 20 Component A-4 wt % 100 99.8 99.6 Component A-5 wt % 100 99.8 99.6 Component B wt % 0.2 0.4 0.2 0.4 Tests Cone/plate rheology Melt visc. at 260 C. eta 471 Pa .Math. s 1020 601 681 856 557 559 eta 329 Pa .Math. s 1220 775 842 1020 697 640 eta 229 Pa .Math. s 1450 976 996 1190 838 719 eta 160 Pa .Math. s 1690 1200 1140 1370 962 791 eta 112 Pa .Math. s 1950 1420 1280 1540 1080 856 eta 77.8 Pa .Math. s 2210 1620 1400 1710 1170 913 eta 54.3 Pa .Math. s 2470 1770 1500 1880 1240 960 eta 37.9 Pa .Math. s 2720 1890 1590 2020 1300 997 eta 26.4 Pa .Math. s 2940 2000 1670 2150 1350 1030 eta 18.4 Pa .Math. s 3140 2080 1720 2250 1390 1050 eta 12.9 Pa .Math. s 3310 2150 1770 2340 1410 1060 eta 8.97 Pa .Math. s 3450 2200 1800 2400 1430 1070 eta 6.25 Pa .Math. s 3550 2230 1820 2450 1440 1080 eta 4.36 Pa .Math. s 3630 2250 1830 2480 1450 1080 eta 3.04 Pa .Math. s 3690 2270 1840 2500 1450 1080 eta 2.12 Pa .Math. s 3720 2280 1840 2520 1450 1080 eta 1.48 Pa .Math. s 3750 2280 1840 2530 1450 1080 eta 1.03 Pa .Math. s 3770 2280 1830 2540 1450 1080 eta 0.721 Pa .Math. s 3780 2280 1830 2550 1450 1070 eta 0.503 Pa .Math. s 3780 2260 1810 2550 1440 1070 Melt visc. at 280 C. eta 471 Pa .Math. s 466 435 343 568 362 326 eta 329 Pa .Math. s 581 484 381 651 409 356 eta 229 Pa .Math. s 704 531 419 729 476 382 eta 160 Pa .Math. s 808 574 453 799 529 404 eta 112 Pa .Math. s 896 610 482 860 560 422 eta 77.8 Pa .Math. s 966 640 506 912 583 436 eta 54.3 Pa .Math. s 1030 663 525 955 601 446 eta 37.9 Pa .Math. s 1080 680 539 989 614 454 eta 26.4 Pa .Math. s 1120 693 550 1020 623 459 eta 18.4 Pa .Math. s 1150 700 556 1030 629 462 eta 12.9 Pa .Math. s 1170 703 560 1050 632 463 eta 8.97 Pa .Math. s 1180 704 562 1060 634 464 eta 6.25 Pa .Math. s 1190 703 563 1060 636 465 eta 4.36 Pa .Math. s 1200 701 563 1060 636 465 eta 3.04 Pa .Math. s 1200 699 564 1070 636 465 eta 2.12 Pa .Math. s 1200 694 563 1070 635 465 eta 1.48 Pa .Math. s 1200 689 564 1070 635 465 eta 1.03 Pa .Math. s 1210 683 565 1070 635 465 eta 0.721 Pa .Math. s 1210 676 568 1070 634 466 eta 0.503 Pa .Math. s 1200 665 572 1070 631 467 Melt visc. at 300 C. eta 471 Pa .Math. s 397 266 232 329 197 148 eta 329 Pa .Math. s 434 28 248 357 208 156 eta 229 Pa .Math. s 469 303 262 383 217 162 eta 160 Pa .Math. s 498 318 273 405 225 167 eta 112 Pa .Math. s 523 330 282 422 230 171 eta 77.8 Pa .Math. s 543 339 288 436 234 174 eta 54.3 Pa .Math. s 557 345 292 446 236 176 eta 37.9 Pa .Math. s 567 349 295 453 238 177 eta 26.4 Pa .Math. s 575 352 297 458 238 177 eta 18.4 Pa .Math. s 579 353 298 461 238 177 eta 12.9 Pa .Math. s 582 354 298 463 238 178 eta 8.97 Pa .Math. s 583 354 298 464 238 178 eta 6.25 Pa .Math. s 584 354 298 464 238 178 eta 4.36 Pa .Math. s 585 353 299 465 237 178 eta 3.04 Pa .Math. s 585 353 299 465 237 179 eta 2.12 Pa .Math. s 585 353 300 465 236 179 eta 1.48 Pa .Math. s 586 353 302 466 236 181 eta 1.03 Pa .Math. s 586 353 304 466 235 183 eta 0.721 Pa .Math. s 588 353 308 466 235 187 eta 0.503 Pa .Math. s 589 353 313 465 234 193 M.sub.n g/mol 8960 8487 8498 9085 8882 9017 M.sub.w g/mol 21042 20665 20437 22490 22136 22053 T.sub.G C. 172.5 169.2 167.8 163.0 160.6 160.0

[0168] Inventive examples 16 and 17 and 19 and 20 show distinctly reduced melt viscosities at all measured shear rates and temperatures compared to comparative examples 15 and 18 respectively.

TABLE-US-00005 TABLE 5 Inventive examples 22 to 26 and comparative example 21 21 Formulation: (comp.) 22 23 24 25 26 Component A-6 wt % 93 93 93 93 93 93 Component A-2 wt % 7 6.9 6.8 6.6 6.4 6.2 Component B wt % 0.1 0.2 0.4 0.6 0.8 Tests MVR 7 kg ml/(10 min) 7.6 7.9 8.1 8.5 9.1 10.2 MVR 20 kg ml/(10 min) 7.9 7.9 8.5 9.5 10.8 12.6 Delta MVR 20/MVR 7 0.3 0.0 0.4 1.0 1.7 2.4 Vicat C. 153.3 152.3 151 149.6 147.8 146.2 Melt viscosity at 280 C. eta 50 Pa .Math. s 1150 1063 1053 1069 995 933 eta 100 Pa .Math. s 1114 1035 1030 1039 970 907 eta 200 Pa .Math. s 1033 960 949 963 908 847 eta 500 Pa .Math. s 785 753 739 756 718 674 eta 1000 Pa .Math. s 549 534 524 534 513 488 eta 1500 Pa .Math. s 423 413 406 413 398 384 eta 5000 Pa .Math. s 180 177 175 176 172 166 Melt viscosity at 300 C. eta 50 Pa .Math. s 530 422 423 eta 100 Pa .Math. s 513 420 419 eta 200 Pa .Math. s 484 416 417 eta 500 Pa .Math. s 430 377 377 eta 1000 Pa .Math. s 350 315 313 eta 1500 Pa .Math. s 290 269 265 eta 5000 Pa .Math. s 138 130 129 Melt viscosity at 320 C. eta 50 Pa .Math. s 312 292 231 eta 100 Pa .Math. s 300 282 230 eta 200 Pa .Math. s 291 271 229 eta 500 Pa .Math. s 273 253 219 eta 1000 Pa .Math. s 239 222 197 eta 1500 Pa .Math. s 211 197 173 eta 5000 Pa .Math. s 115 109 102 Notched impact resistance RT kJ/m.sup.2 50z 50z 53z 51z 68z 51z 20 C. kJ/m.sup.2 45z 45z 45z 45z 46z 45z 40 C. kJ/m.sup.2 44z 38z 40z 40z 44z 40z 50 C. kJ/m.sup.2 8 34z* 8 34z 9 33z 8 34z 9 35z 5 33z 2 29s** 2 29s 1 30s 2 29s 1 29s 5 28s Optical properties 4 mm, 300 C..sup.1) Transmission % 87.43 87.35 87.60 87.41 87.41 87.39 Y.I. 5.32 5.56 4.81 4.98 4.96 4.79 Optical properties 4 mm, 320 C. Transmission % 87.57 87.51 87.70 87.58 87.51 87.47 Y.I. 5.22 5.20 4.59 4.71 4.74 4.75 .sup.1)melt temperature in the injection moulding process in the production of the test specimens; *tough; **brittle

[0169] Inventive examples 22 to 26 exhibit distinctly reduced melt viscosities compared to comparative example 21 at all shear rates and temperatures measured. The good low-temperature toughness is maintained; the yellowness index is reduced.

TABLE-US-00006 TABLE 6 Inventive examples 28 to 30 and comparative example 27 27 Formulation (comp.) 28 29 30 Component A-7 wt % 93.00 93.00 93.00 93.00 Component A-2 wt % 2.89 2.79 2.69 2.59 Component C-2 wt % 0.10 0.10 0.10 0.10 Component D-2 wt % 4.00 4.00 4.00 4.00 Component B wt % 0.1 0.2 0.3 Component D-1 wt % 0.01 0.01 0.01 0.01 MVR ml/(10 min) 8.3 9.2 14.4 20.2 IMVR20 ml/(10 min) 9.2 10 16.5 22.6 Delta MVR/IMVR20 0.9 0.8 2.1 2.4 Vicat C. 144.5 144.5 143.1 142.0 Melt visc. at 280 C. eta 50 Pa .Math. s 1015 976 871 788 eta 100 Pa .Math. s 964 929 845 748 eta 200 Pa .Math. s 873 842 765 685 eta 500 Pa .Math. s 673 651 609 544 eta 1000 Pa .Math. s 487 473 449 408 eta 1500 Pa .Math. s 383 372 357 327 eta 5000 Pa .Math. s 168 165 159 151 Melt visc. at 300 C. eta 50 Pa .Math. s 502 486 439 386 eta 100 Pa .Math. s 491 476 430 377 eta 200 Pa .Math. s 469 455 408 367 eta 500 Pa .Math. s 400 390 351 317 eta 1000 Pa .Math. s 321 316 287 264 eta 1500 Pa .Math. s 268 266 250 227 eta 5000 Pa .Math. s 129 129 125 117 Melt visc. at 320 C. eta 50 Pa .Math. s 293 291 268 224 eta 100 Pa .Math. s 289 289 264 219 eta 200 Pa .Math. s 284 286 260 210 eta 500 Pa .Math. s 252 256 235 192 eta 1000 Pa .Math. s 215 218 202 169 eta 1500 Pa .Math. s 189 191 178 154 eta 5000 Pa .Math. s 103 105 101 90 Notched impact resistance 23 C. kJ/m.sup.2 63z 64z 63z 64z 20 C. kJ/m.sup.2 58z 58z 57z 57z 30 C. kJ/m.sup.2 56z 56z 56z 54z 40 C. kJ/m.sup.2 20s 20s 20s 19s

[0170] Inventive examples 28 to 30 exhibit distinctly reduced melt viscosities compared to comparative example 27 at all shear rates and temperatures measured. The good low-temperature toughness is maintained.

TABLE-US-00007 TABLE 7 Inventive examples 32 to 34 and 36 to 38 and comparative examples 31 and 35 31 35 Formulation (comp.) 32 33 34 (comp.) 36 37 38 Bayblend T65 wt % 100.00 99.80 99.60 99.40 Bayblend FR3030 wt % 100.00 99.80 99.60 99.40 Component B wt % 0.20 0.40 0.60 0.20 0.40 0.60 Tests MVR 260 C./5 kg ml/(10 min) 14.5 14.8 16.9 18.4 4.2 4.5 4.8 5.3 IMVR20260 C./5 kg ml(10 min) 12.5 14.0 17.8 21.1 4.1 4.5 4.9 5.1 Delta MVR/MVR20 260 C./5 kg 2.0 0.8 0.9 2.7 0.1 0.0 0.1 0.2 Vicat VSTB 120 C. 115.7 115.2 113.7 113.3 113.5 112.4 111 110.6 Melt visc. at 260 C. eta 50 Pa .Math. s 923 914 844 804 1545 1483 1419 1406 eta 100 Pa .Math. s 724 717 667 639 1232 1182 1145 1129 eta 200 Pa .Math. s 542 541 506 485 967 927 892 886 eta 500 Pa .Math. s 336 333 313 308 641 625 597 601 eta 1000 Pa .Math. s 219 210 206 205 438 424 407 411 eta 1500 Pa .Math. s 167 168 158 158 338 328 313 318 eta 5000 Pa .Math. s 74 75 71 71 143 140 135 137 Melt visc. at 280 C. eta 50 Pa .Math. s 550 501 437 379 eta 100 Pa .Math. s 437 410 371 355 eta 200 Pa .Math. s 341 328 296 285 eta 500 Pa .Math. s 230 224 206 200 eta 1000 Pa .Math. s 158 157 146 140 eta 1500 Pa .Math. s 124 123 115 112 eta 5000 Pa .Math. s 56 56 53 51 Melt visc. at 300 C. eta 50 Pa .Math. s 302 278 236 229 eta 100 Pa .Math. s 234 229 192 184 eta 200 Pa .Math. s 200 184 158 148 eta 500 Pa .Math. s 146 136 118 112 eta 1000 Pa .Math. s 107 102 93 88 eta 1500 Pa .Math. s 88 85 77 75 eta 5000 Pa .Math. s 44 43 40 39 Notched impact resistance 25 C. kJ/m.sup.2 82z 61z 61z 66z 49z 49z 46z 43z 10 C. kJ/m.sup.2 35z 34z 23s 18s 0 C. kJ/m.sup.2 17s 17s 16s 15s 10 C. kJ/m.sup.2 20 C. kJ/m.sup.2 100z 81z 63z 80z 13s 13s 30 C. kJ/m.sup.2 40 C. kJ/m.sup.2 92z 99z 107z 87z 50 C. kJ/m.sup.2 3 36z 3 34z 2 37z 4 37z 7 23s 7 24s 8 23s 6 23s 60 C. kJ/m.sup.2 20s 21s 20s 19s

[0171] Inventive examples 32 to 34 and 36 to 38 show reduced melt viscosities at all measured shear rates and temperatures compared to comparative examples 31 and 35 respectively. The good low-temperature toughness is maintained.