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Thermoplastic rubber composition

A thermoplastic, rubber technology, applied in the field of rubber matrix composition

Inactive Publication Date: 2002-02-27
SYH TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] As far as the inventors are aware, there is no available system for reliably blending natural rubber with a wide variety of thermoplastics

Method used

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  • Thermoplastic rubber composition
  • Thermoplastic rubber composition
  • Thermoplastic rubber composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0123] Example 1-General steps for making composite materials

[0124] The following are general steps for manufacturing the composite material of the present invention. The amount of each component is given in the following specific examples.

[0125] Step: Pre-plasticize the natural rubber together with the first and second compatibilizers and peptizer (if necessary) in an internal mixer or open mill for about 5 minutes or less, although if open In the case of a mill, this process may take more than 10 minutes. The time depends on the viscosity of the rubber. The temperature during mixing or mastication should preferably not exceed 120°C. Any additives such as fillers can be added during the mastication process. After mixing, the raw materials are usually stable in viscosity, sliced ​​and cured with the polyethylene flakes between the pieces. The curing time can be 6-12 hours. The rubber matrix is ​​then cut into strips and added to a Branbury mixer or mixing extruder (such as a...

Embodiment 21

[0126] Example 2.1-Rubber thermoplastic composition containing nitrile first compatibilizer and polyamide thermoplastic

[0127] The composite materials listed in Table 1 were manufactured according to the steps of Example 1.

[0128] NR

NIR / N

BR

PA-6

PVA

Phenolic

Resin

Chlorination

Tin

Stearin

Zinc acid

HVA 2

DCP

Antioxidant

Chemical agent

5

25

70

5

5

0.5

1

0.75

0.05

1

10

30

60

5

5

0.5

1

0.75

0.06

1

20

30

50

5

5

0.5

1

0.75

0.07

1

30

30

40

5

5

0.5

1

0.75

0.08

1

40

30

30

5

5

0.5

1

0.75

0.09

1

[0129] Ethylene rubber o...

Embodiment 22

[0131] Example 2.2-Rubber thermoplastic composition containing nitrile first compatibilizer and polyolefin thermoplastic

[0132] The composite materials in Tables 2 and 3 are manufactured below.

[0133] Shaw

Hardness

NR

NBR

LLDPE

EVA

Engage

HVA 2

Peroxygen

Compound

MBTS

Stearin

Zinc acid

Antioxidant

Chemical agent

65A

15

30

10

35

10

0.75

0.07

0.25

1

1

60A

15

30

10

30

15

0.75

0.07

0.25

1

1

55A

15

30

5

25

20

0.75

0.075

0.25

1

1

50A

15

30

5

20

25

0.75

0.075

0.25

1

1

45A

15

30

5

10

30

0.75

0.08

0.25

1

1

40A

15...

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Abstract

A rubber matrix including a) 10-90 % (v / v) of natural rubber, b) one or more first compatabilisers selected from a group of polymers containing either i) a nitrile group, ii) a halogen, iii) an acetate group, iv) an epoxide, v) a styrene, or vi) an acrylate and c) one or more second compatabilisers which are interfacial copromoters selected from a group comprising either i) polyvinyl acetate, ii) ethylene vinyl acetate, iii) polyacrylonitrile or high nitrile resin, iv) acrylamide or polyacrylamide, v) a phenolic resin, vi) an acrylate polymer, vii) a halogenated polymer, viii) maleic anhydride or polymaleic anhydride, or ix) a bismaleimide. The rubber matrix may be mixed with one or more thermoplastics selected from a group comprising either i) polyurethanes, ii) polyesters, iii) polyamides, iv) acrylates, v) acrylonitrile butadiene styrene, vi) polyolefins, or vii) cellulose esters to form a rubber thermoplastics composite.

Description

[0001] The invention relates to a rubber matrix composition containing natural rubber and capable of producing thermoplastic composite materials in the range of thermoplastics. Background of the invention [0002] Natural rubber has been used for various purposes for a long time, but some of its properties make rubber more difficult to use in industrial processes and / or make it unsuitable for certain applications. These properties include high molecular weight, high viscosity, often mixed with naturally occurring protein impurities, and often high impurity content. In addition, commonly used rubber is crosslinked by vulcanization. These crosslinks are difficult to reverse, and as a result, the recycling of used rubber products is difficult to reach a satisfactory level. [0003] Compared with plastics and certain other rubbers, natural rubber also has some very useful properties. These properties include toughness, dynamic sealing, resilience, flexural fatigue life, low compression...

Claims

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Application Information

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IPC IPC(8): C08L7/00C08L75/04C08L77/00
CPCC08C19/06C08L75/04C08L9/02C08L7/00C08L23/0869C08L15/00C08L77/00C08L2666/04C08L2666/02
Inventor V·S·潘迪兰杰
Owner SYH TECH
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