High-stability rubber composition and preparation method thereof

A rubber composition, high stability technology, applied in the field of rubber, can solve the problem of insufficient reinforcement effect of natural rubber, and achieve the effect of good physical and mechanical properties, stable product size, and high elasticity

Active Publication Date: 2020-05-15
AGRI PRODS PROCESSING RES INST CHINESE ACAD OF TROPICAL AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent CN201310518013.3 uses clay as a filler, and uses a coupling agent to connect the clay bridge to the crosslinked network of rubber to prepare a clay-natural rubber composite material. Although the dispersion of clay in the rubber matrix has been improved to a certain extent, the Its reinforcing effect on natural rubber is still not obvious enough, and the tensile strength of the prepared clay-natural rubber composite only fluctuates in the range of 25-28MPa

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0031] In a preferred embodiment, the preparation method of the filler comprises the following steps:

[0032] (a) After mixing clay and thionyl chloride, add N,N-dimethylformamide and react at 80-90°C for 20-30h. After the reaction, excess thionyl chloride is distilled off under reduced pressure to obtain mixture 1 ;

[0033] (b) After mixing the mixture 1, polyethylene glycol and toluene, add a catalyst, react at 0°C for 20-40min, then react at 110-130°C for 1-2h, and finally filter, wash and dry to obtain .

[0034] In a more preferred embodiment, the preparation method of the filler comprises the following steps:

[0035] (a) After mixing clay and thionyl chloride, add N,N-dimethylformamide, react at 85° C. for 25 hours, and distill off excess thionyl chloride after the reaction to obtain mixture 1;

[0036] (b) After mixing the mixture 1, polyethylene glycol, and toluene, add 2 drops of catalyst dibutyltin dilaurate, react at 0°C for 30min, then react at 120°C for 1h, ...

Embodiment 1

[0072] Embodiment 1 of the present invention provides a kind of high stability rubber composition, by weight, comprises 100 parts of natural latex in dry rubber, 5 parts of epoxidized natural latex in dry rubber, 10 parts of filler, 2 parts multifunctional coupling agent.

[0073] The natural rubber latex is concentrated natural rubber latex with a total solid content of 60% after centrifugal concentration.

[0074] The epoxidized natural rubber latex is epoxidized natural rubber latex prepared by concentrating natural rubber latex through epoxidation reaction.

[0075] The epoxidized natural rubber latex has an epoxidation degree of 25% and a total solid content of 20%.

[0076] The preparation method of described filler comprises the following steps:

[0077] (a) After mixing clay and thionyl chloride, add N,N-dimethylformamide, react at 85° C. for 25 hours, and distill off excess thionyl chloride after the reaction to obtain mixture 1;

[0078] (b) After mixing the mixtu...

Embodiment 2

[0092] Embodiment 2 of the present invention provides a kind of high-stability rubber composition, by weight, comprises 97 parts of natural latex in dry rubber, 3 parts of epoxidized natural latex in dry rubber, 8 parts of fillers, 1 part multifunctional coupling agent.

[0093] The natural rubber latex is concentrated natural rubber latex with a total solid content of 60% after centrifugal concentration.

[0094] The epoxidized natural rubber latex is epoxidized natural rubber latex prepared by concentrating natural rubber latex through epoxidation reaction.

[0095] The epoxidized natural rubber latex has an epoxidation degree of 25% and a total solid content of 20%.

[0096] The preparation method of described filler comprises the following steps:

[0097] (a) After mixing clay and thionyl chloride, add N,N-dimethylformamide, react at 85° C. for 25 hours, and distill off excess thionyl chloride after the reaction to obtain mixture 1;

[0098] (b) After mixing the mixture 1...

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Abstract

The invention relates to the technical field of rubber, in particular to a high-stability rubber composition and a preparation method thereof. According to the invention, the rubber composition is prepared from specific rubber components, fillers and a multifunctional coupling agent, the tensile strength of a vulcanized rubber sheet of the prepared rubber composition is greater than or equal to 35MPa, the elongation at break is greater than or equal to 990%, the 300% stress at definite elongation is greater than or equal to 9MPa, the tearing strength is greater than or equal to 70kN / m, the Akron abrasion volume is less than or equal to 0.2cm<3> / 1.61 km, and the tensile strength reduction rate is less than or equal to 8% and the weight gain rate of the vulcanized rubber sheet is less than or equal to 5% after soaking in 100 DEG C oil for 72 hours. The rubber composition prepared by the invention has high stability and high elasticity, maintains good physical and mechanical properties, also has high wear resistance and hot oil aging resistance, high breaking strength, good edge tearing effect and stable product size, and has a wide application prospect.

Description

technical field [0001] The invention relates to the technical field of rubber, and more specifically, the invention relates to a high-stability rubber composition and a preparation method thereof. Background technique [0002] Rubber (Rubber) refers to a highly elastic polymer material with reversible deformation. It is elastic at room temperature, can produce large deformation under a small external force, and can return to its original shape after the external force is removed. Rubber is a completely amorphous polymer, its glass transition temperature (Tg) is low, and its molecular weight is often large, greater than hundreds of thousands. Rubber is divided into natural rubber and synthetic rubber. Natural rubber (NR) is a natural polymer compound with cis-1,4-polyisoprene as the main component, and 91% to 94% of its components are rubber hydrocarbons (cis-1,4-polyisoprene Diene), and the rest are non-rubber substances such as protein, fatty acid, ash, sugar, etc. Natur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L7/02C08L15/00C08K9/04C08K9/02C08K3/34C08K9/06C08K3/06C08K3/22C08K5/39
CPCC08L7/02C08L2201/08C08K2201/011C08K2003/2296C08L15/00C08K9/04C08K9/02C08K3/346C08K9/06C08K3/06C08K3/22C08K5/39
Inventor 曾宗强张福全李高荣龙华倩孙中锐王兵兵廖禄生彭政
Owner AGRI PRODS PROCESSING RES INST CHINESE ACAD OF TROPICAL AGRI SCI
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