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Brominated polyisobutylene-p-methylstyrene rubber composition, preparation method thereof and vulcanized rubber

A technology of p-methyl styrene and brominated polyisobutylene, applied in brominated polyisobutylene-p-methyl styrene-based rubber composition and preparation thereof, and the field of vulcanizate, can solve the problem of reducing the degree of rubber crosslinking and increasing the interface phase. Compatibility and other issues to achieve the effect of improving the degree of vulcanization, improving interfacial compatibility, and low hardness

Active Publication Date: 2021-09-24
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, brominated polyisobutylene-p-methylstyrene-based rubber and amino-terminated nylon or carboxyl-terminated nylon will undergo grafting reactions, which will reduce the degree of crosslinking of the rubber while increasing interfacial compatibility.

Method used

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  • Brominated polyisobutylene-p-methylstyrene rubber composition, preparation method thereof and vulcanized rubber
  • Brominated polyisobutylene-p-methylstyrene rubber composition, preparation method thereof and vulcanized rubber
  • Brominated polyisobutylene-p-methylstyrene rubber composition, preparation method thereof and vulcanized rubber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] The basic composition and weight of the selected raw materials are as follows:

[0066] Brominated polyisbutylene - methylstyrene rubber (grade 3745,

[0067] Exxon Mobil, BR content is 2.3 wt%, Menny viscosity is ml

[0068]

[0069]

[0070] According to the above formulation, the nylon is advanced, the blocking agent, catalyst, and antioxidants, and nylon are blended at 220 ° C for 8 minutes in the mesh; then carry out rubber and plastic premixing, polybutylene-pair Base-based rubber plastic is uniform, and then mixed with the nylon after 220 ° C for 10 min in the mesenchym, and then cool to room temperature, add a vulcanization system, mix well to obtain a brominated polyisbutylene - pair Base-based rubber composition;

[0071] Finally, dynamic vulcanization is performed, and the resulting brominated polyisobutylene is placed in a twin-screw extruder in a twin screw extruder, and the vulcanization temperature is 220 ° C, the rotational speed is 400 rpm, and the dyna...

Embodiment 2

[0074] The basic composition and weight of the selected raw materials are as follows:

[0075] Brominated polyisbutylene - methylstyrene rubber (grade 3745,

[0076] Exxon Mobil, BR content is 2.3 wt%, Menny viscosity is ml

[0077]

[0078]

[0079] The implementation steps are different from Example 1, and different is different amounts of the sealing agent octadecyl glycerol ether.

Embodiment 3

[0081] The basic composition and weight of the selected raw materials are as follows:

[0082] Brominated polyisbutylene - methylstyrene rubber (grade 3745,

[0083] Exxon Mobil, BR content is 2.3 wt%, Menny viscosity is ml

[0084]

[0085] The implementation steps are different from Example 1, and different is different amounts of the sealing agent octadecyl glycerol ether.

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Abstract

The invention discloses a brominated polyisobutylene-p-methylstyrene rubber composition, a preparation method thereof and vulcanized rubber. The rubber composition is prepared from the following raw materials: brominated polyisobutene-p-methylstyrene rubber, polyamide, an antioxidant, zinc oxide, magnesium oxide, stearic acid, an accelerant, an end-capping reagent and a catalyst. The preparation method comprises the following steps: blending the end-capping reagent, the catalyst, the antioxidant and polyamide for end capping, uniformly plastifying brominated polyisobutylene-p-methylstyrene rubber, blending with the mixture, adding a vulcanization system, uniformly mixing to obtain a rubber composition, and putting the rubber composition into a double-screw extruder for dynamic vulcanization to obtain the thermoplastic vulcanized rubber. According to the invention, a nylon pre-blocking treatment method is adopted, so that the reaction between a nylon end group and rubber is shielded, the vulcanization degree of the rubber and the interfacial compatibility of rubber and plastic phases are improved, and the prepared thermoplastic vulcanized rubber has a fine microscopic phase structure, excellent physical and mechanical properties and high-temperature-resistant and high-gas-barrier properties.

Description

Technical field [0001] The present invention relates to the field of polymer materials, and is further referred to, and is a brominated polyisobutylene - a methylstyrene rubber composition and a preparation method thereof and a sulfide. Background technique [0002] Thermoplastic sulfide is mainly composed of a small amount of thermoplastic resin (20 to 40%) and a large number of highly crosslinked rubber (60 to 80%), and the vulcanized crosslinked rubber particles are dispersed in a continuous resin, and the rubber micro-region provides elasticity, resin. Provides plastic flow at melting temperatures. Butyl rubber (IIR) and nylon (PA) mixed with dynamic vulcanized IIR / PA thermoplastic elastomers (DVA), with good physical mechanical properties and excellent airtight properties, can be repeatedly processed, and the processing is diverse. It is mainly used in the airtight layer of the tire. [0003] For butyl rubber and nylon system, the compatibility of the rubber and plastic ph...

Claims

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Application Information

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IPC IPC(8): C08L23/28C08L77/06C08K3/22C08K5/09C08K5/40C08K5/47C08G69/48
CPCC08L23/283C08G69/48C08K2003/2296C08K2003/222C08L2201/08C08L2201/14C08L77/06C08K3/22C08K5/09C08K5/40C08K5/47Y02T10/86
Inventor 田明王富港宁南英张立群张世甲田洪池
Owner BEIJING UNIV OF CHEM TECH
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