COMPOSITES REINFORCED FOR ELASTIC SUBSTANCE AND THE MANUFACTURING METHOD FOR THE SAME

Abstract

A method for manufacturing an anti-aging rubber is disclosed. The method includes the following steps: adding and mixing one of a carbon tube material and a graphene material into a rubber-processing oil consistently to obtain a rubber-reinforced composite; and mixing the rubber-reinforced composite with a main rubber, a filler and a crosslinking agent.

Claims

1. A method for manufacturing an anti-aging rubber, comprising the following steps: adding and mixing one of a carbon tube material and a graphene material into a rubber-processing oil consistently to obtain a rubber-reinforced composite; and mixing the rubber-reinforced composite with a main rubber, a filler and a crosslinking agent.

2. The method as claimed in claim 1, wherein a ratio of one of the carbon tube material and the graphene material to the rubber-reinforced composite is 0.00130 wt %.

3. The method as claimed in claim 2, wherein a ratio of one of the carbon tube material and the graphene material to the rubber-reinforced composite is 0.15 wt %.

4. The method as claimed in claim 1, wherein a ratio of the filler to the main rubber is 1075%.

5. The method as claimed in claim 4, wherein a ratio of the filler to the main rubber is 2550%.

6. The method as claimed in claim 1, wherein the filler is one selected from a group consisting of a carbon black, a silica, a carbon fiber and a glass fiber.

7. A reinforced composite for an elastic material, comprising: a carbon material; and an elastic material processing oil mixed with the carbon material, wherein the reinforced composite has a viscosity ranging from 1000 cps to 300,000 cps.

8. The reinforced composite as claimed in claim 7, wherein the reinforced composite is less than 20 parts per hundred of rubber (phr) when manufacturing the elastic material.

9. The reinforced composite as claimed in claim 8, wherein the reinforced composite is less than 10 parts per hundred of rubber (phr) when manufacturing the elastic material.

10. A manufacturing method of a reinforced composite for an elastic material, comprising the following steps: providing a carbon material; providing an elastic material processing oil; and mixing the carbon material and the elastic material processing oil.

11. The method as claimed in claim 10, wherein the carbon material is one of a nano carbon tube material and a graphene material.

12. The method as claimed in claim 10, wherein the elastic material is one of a rubber and a silicone.

13. The method as claimed in claim 10, wherein the elastic material has a Young's modulus less than 1400 MPa.

14. The method as claimed in claim 10, wherein the mixing step is subject to at least one selected from the group consisting of a roller type ball-mixing dispersion, a blade shear stirring dispersion and a high-pressure homogeneous dispersion.

15. The method as claimed in claim 10, wherein the elastic material processing oil includes at least one selected from the group consisting of a high naphthenic processing oil, an environmentally friendly rubber-processing oil TDAE, a paraffinic rubber-processing oil and a silicone rubber-processing oil (silicone oil).

16. The method as claimed in claim 10, wherein the carbon material is subjected to a surface treatment in advance.

17. The method as claimed in claim 16, wherein the surface treatment includes one of a physical modification and a chemical modification.

18. The method as claimed in claim 10, wherein the carbon material and the elastic material processing oil are mixed uniformly

Description

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

[0010] The present invention will now be described more specifically with reference to the following embodiments. It is to be noted that the following descriptions of preferred embodiments of this invention are presented herein for the purposes of illustration and description only; they are not intended to be exhaustive or to be limited to the precise form disclosed.

[0011] The present invention relates to a method for manufacturing an anti-aging rubber or silicone. The reinforced composite is added in the manufacturing process of the rubber or silicone to make its product properties better. The nano carbon tube or graphene is added into the processing oil of rubber or silicone, and is fully mechanically dispersed, such as by a roller type ball-mixing dispersion, a blade shear stirring dispersion and a high-pressure homogeneous dispersion which are shear mechanical modes, to manufacture the reinforced composite containing nano carbon tube/graphene. The manufacturing process is heated from 30 to 100 C. The nano carbon tube or graphene can be subjected to a surface treatment, and the surface treatment is a physical modification or a chemical modification. The chemical modification (such as a chemical graft modification) can be done by adding a coupling agent (such as a silane coupling agent or a titanate coupling agent) to modify the carbon tube to increase the mechanical strength of the rubber or silicone material. The physical modification can be a plasma treatment. The rubber or silicone processing oil is a processing oil with different proportions of paraffin, naphthenic or aromatic. The type of processing oil is a high naphthenic processing oil, an environmentally friendly rubber-processing oil TDAE, a paraffinic rubber-processing oil or a silicone rubber-processing oil (silicone oil). In addition, in the manufacturing process of non-silicone rubber (such as synthetic rubber), a processing aid can be added, such as glycol (such as PEG) or plasticizer, so that the viscosity of the reinforced composite is higher than the commercial rubber or silicone processing oil, which ranges from 1000 cps to 300,000 cps. Then, the reinforced composite is mixed with a main rubber, a filler and a crosslinking agent. A ratio of the nano carbon tube or the graphene to the reinforced composite is 0.00130 wt %, preferably 0.15 wt %. The filler is a carbon black, a silica, a carbon fiber or a glass fiber.

[0012] The above mentioned reinforced composite makes the hardness value of the rubber or silicone product increase by less than 3 degrees, and it increases the values of tensile strength, tearing strength and elongation at the same time; or by making the hardness value increase by less than 3 degrees, it will improve the aging resistance of the rubber or silicone product at the same time. The reinforced composite is less than 20 parts per hundred of rubber (phr) when manufacturing the rubber or silicone, preferably less than 10 phr. The reinforced composite can make the rubber or silicone aging resistance higher, and it can make the product properties of tire tread (top and bottom) glue, tire (lateral) side glue and lining better. When the tread glue is added with the above mentioned reinforced composite, the aging resistance is increased to prolong the tire usage duration or the total amount of the tread glue can be reduced to make the tire weight lighter and the energy consumption lower while the tire is running, and thus the cost is reduced. In addition, adding the reinforced composite can increase the conductivity of the rubber or silicone slightly (resistivity is reduced within 100 folds). For example, the surface resistivity in Embodiment 1 is reduced from 3.610.sup.4 ohms/sq to 1.810.sup.4 ohms/sq.

Embodiment 1

[0013] SBR rubber mixed with10 phr high naphthenic rubber oil v.s. 10 phr reinforced composite (i.e. containing carbon tube and high naphthenic rubber-processing oil) (such as a gel form)

Test Formula

[0014]

TABLE-US-00001 Components formula 1 (phr) formula 2 (phr) SBR-1502 100 100 Zinc oxygen powder 40 40 Stearic acid 10 10 DM 7 7 CZ 7 7 RD old anti-agent 10 10 3C old anti-agent 10 10 S (sulfur) 18 18 N330 50 50 High naphthenic rubber oil 10 Reinforced composite 10 containing carbon tube and high naphthenic rubber-processing oil

Test Data

[0015]

TABLE-US-00002 Test formula formula 1 formula 2 Hardness 60 60 Power (Kg) 20.85 26.33 Tensile stress (Kg/cm.sup.2) 177.89 214.35 Elongation (%) 288.91 404.77 Tearing strength (Kg/cm) 69.84 84.81 Surface resistivity (ohms/sq) 3.6 10.sup.4 1.8 10.sup.4

Embodiment 2

[0016] SBR rubber mixed with10 phr environmentally friendly rubber-processing oil TDAE v.s. 10 phr reinforced composite (i.e. containing carbon tube and environmentally friendly rubber-processing oil TDAE)

Test Formula

[0017]

TABLE-US-00003 Components formula 3 (phr) formula 4 (phr) SBR-1502 100 100 Zinc oxygen powder 40 40 Stearic acid 10 10 DM 7 7 CZ 7 7 RD old anti-agent 10 10 3C old anti-agent 10 10 S (sulfur) 18 18 N330 50 50 TDAE processing oil 10 Reinforced composite 10 containing carbon tube and TDAE processing oil

Test Data

[0018]

TABLE-US-00004 Test formula formula 3 formula 4 Hardness 60 60 Power (Kg) 24.48 28.65 Tensile stress (Kg/cm.sup.2) 217.73 236.41 Elongation (%) 622.62 685.15 Tearing strength (Kg/cm) 70.1 80.1 Surface resistivity (ohms/sq) 1.17E+05 3.86E+04 Crack growth characteristics Start to crack after obviously crack after of the test 10,000 times; 80,000 times obviously crack after 30,000 times

[0019] The above crack growth test specification uses test specification-ASTM D813, the testing method is De Mattia Flexing machine, and the test conditions are 150 C., 5 Hz of frequency and 57 mm of folding trip. Starting to crack indicates the width of a split less than 0.1 mm, and obviously crack indicates the width of a split less than 0.2 mm.

Embodiment 3

[0020] SBR rubber mixed with10 phr environmental friendly rubber-processing oil TDAE v.s. 10 phr and 20 phr reinforced composites (i.e. containing graphene and environmental friendly rubber-processing oil TDAE)

[0021] Test formula:

TABLE-US-00005 formula 5 formula 6 formula 7 Components (phr) (phr) (phr) SBR-1502 100 100 100 Zinc oxygen powder 40 40 40 Stearic acid 10 10 10 DM 7 7 7 CZ 7 7 7 RD old anti-agent 10 10 10 3C old anti-agent 10 10 10 S (sulfur) 18 18 18 N330 50 50 50 TDAE processing oil 10 Reinforced composite 10 20 containing graphene and TDAE processing oil

Test Data

[0022]

TABLE-US-00006 Test formula formula 5 formula 6 formula 7 Hardness 60 60 60 Tensile stress (Kg/cm.sup.2) 217.73 251.97 255.65 Elongation (%) 622.62 627.03 704.46 Specific surface 1.17E+05 9.27E+03 4.74E+03 resistivity (ohms/sq)

[0023] From the above Embodiments 1-3, it is found that the rubber mixed with the reinforced composite of the present invention, no matter what kind of processing oil is added to the carbon tube or graphene, the tensile stress, elongation and tearing strength are increased, and the surface resistivity is reduced slightly, which represents increased physical properties, improved aging resistance and enhanced antistatic characteristics of the rubber. In Embodiment 2, it is further found that the formula of general TDAE starts to crack after 10,000 times and obviously cracks after 30,000 times in the crack growth characteristics of the test, but the formula added with the reinforced composite of the present application can delay the occurrence of crack until 80,000 times in the test.

Embodiment 4

Test Formula

[0024]

TABLE-US-00007 Rubber- Rubber- Rubber- reinforced reinforced reinforced composite composite composite containing containing containing carbon tube carbon tube carbon tube Original and TDAE and TDAE and TDAE material #1 #2 #3 SBR 76 76 76 76 BR 24 24 24 24 carbon black 85 85 85 85 Zinc oxygen 3 3 3 3 powder Stearic acid 1 1 1 1 Oil 12.5 10.5 7.5 0.5 Promoter 1.7 1.7 1.7 1.7 S (sulfur) 2 2 2 2 Rubber- 0 2 5 12 reinforced composite

[0025] SBR is an oil-filled SBR, such as SBR-1723, SBR-1712 oil-filled rubbers or SSBR rubber.

Test Data

[0026]

TABLE-US-00008 Rubber- Rubber- Rubber- reinforced reinforced reinforced composite composite composite containing containing containing carbon tube carbon tube carbon tube Original and TDAE and TDAE and TDAE material #1 #2 #3 The tensile properties made by rubber vulcanization under 165.Math. and 15 minutes: Hardness 68 68 68 66 Tensile stress 202 199 211 195 (Kg/cm.sup.2) Elongation (%) 529 528 523 692 300% M 100 99 105 68 Tearing strength 36 41 34 33 (Kg/cm) The tensile properties after aging process under 100.Math. and 48 hours: Hardness 74 74 74 71 Tensile stress 184 192 186 186 (Kg/cm.sup.2) Elongation (%) 393 417 390 532 300% M 135 136 142 94 Tearing strength 19 32 21 27 (Kg/cm) Tensile strength 91.09% 96.48% 88.15% 95.38% retention Elongation (%) 74.29% 78.98% 74.57% 77.02% retention

[0027] From Embodiment 4, it can be realized that when adding 2 phr, 5 phr and 12 phr reinforced composites, the reinforced composite with 2 phr has excellent performance in the aspects of tensile strength and tearing strength.

[0028] For Embodiments 1-4 in general terms, the addition of the reinforced composite can be less than 20 phr, preferably less than 10 phr.

Embodiments

[0029] 1. A method for manufacturing an anti-aging rubber, comprising the following steps: adding and mixing one of a carbon tube material and a graphene material into a rubber-processing oil consistently to obtain a rubber-reinforced composite; and mixing the rubber-reinforced composite with a main rubber, a filler and a crosslinking agent.

[0030] 2. The method as in Embodiment 1, wherein a ratio of one of the carbon tube material and the graphene material to the rubber-reinforced composite is 0.00130 wt %.

[0031] 3. The method as in Embodiments 1-2, wherein a ratio of one of the carbon tube material and the graphene material to the rubber-reinforced composite is 0.1-5 wt %.

[0032] 4. The method as in Embodiments 1-3, wherein a ratio of the filler to the main rubber is 1075%.

[0033] 5. The method as in Embodiments 1-4, wherein a ratio of the filler to the main rubber is 2550%.

[0034] 6. The method as in Embodiments 1-5, wherein the filler is one selected from a group from a carbon black, a silica, a carbon fiber and a glass fiber.

[0035] 7. A reinforced composite for an elastic material, comprising:

[0036] a carbon material; and an elastic material processing oil mixed with the carbon material, wherein the reinforced composite has a viscosity ranging from 1000 cps to 300,000 cps.

[0037] 8. The reinforced composite as in Embodiment 7, wherein the reinforced composite is less than 20 parts per hundred of rubber (phr) when manufacturing the elastic material.

[0038] 9. The reinforced composite as in Embodiments 7-8, wherein the reinforced composite is less than 10 parts per hundred of rubber (phr) when manufacturing the elastic material.

[0039] 10. A manufacturing method of a reinforced composite for an elastic material, comprising the following steps: providing a carbon material; providing an elastic material processing oil; and mixing the carbon material and the elastic material processing oil.

[0040] 11. The method as in Embodiment 10, wherein the carbon material is one of a nano carbon tube material and a graphene material.

[0041] 12. The method as in Embodiments 10-11, wherein the elastic material is one of a rubber and a silicone.

[0042] 13. The method as in Embodiments 10-12, wherein the elastic material has a Young's modulus less than 1400 MPa.

[0043] 14. The method as in Embodiments 10-13, wherein the mixing step is subject to at least one selected from the group consisting of a roller type ball-mixing dispersion, a blade shear stirring dispersion and a high-pressure homogeneous dispersion.

[0044] 15. The method as in Embodiments 10-14, wherein the elastic material processing oil includes at least one selected from the group consisting of a high naphthenic processing oil, an environmentally friendly rubber-processing oil TDAE, a paraffinic rubber-processing oil and a silicone rubber-processing oil (silicone oil).

[0045] 16. The method as in Embodiments 10-15, wherein the carbon material is subjected to a surface treatment in advance.

[0046] 17. The method as in Embodiments 10-16, wherein the surface treatment includes one of a physical modification and a chemical modification.

[0047] 18. The method as in Embodiments 10-17, wherein the carbon material and the elastic material processing oil are mixed uniformly

[0048] Based on the above, the present invention effectively solves the problems and drawbacks in the prior art, and thus it meets the demands of the industry and is of value.

[0049] While the invention has been described in terms of what is presently considered to be the most practical and preferred embodiments, it is to be understood that the invention need not be limited to the disclosed embodiments. On the contrary, it is intended to cover various modifications and similar arrangements included within the spirit and scope of the appended claims which are to be accorded with the broadest interpretation so as to encompass all such modifications and similar structures.