Poly4-methyl-1-pentene/silicone rubber thermoplastic elastomer, preparation and application thereof

A thermoplastic elastomer and silicone rubber technology, applied in the field of dynamic vulcanized thermoplastic elastomers, can solve the problems of low heat resistance and poor heat resistance, and achieve high heat resistance, high production efficiency, and high release properties

Active Publication Date: 2020-10-16
拓烯科技(衢州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patent documents of US6013715, CN102040841A and CN107325404A report the preparation of polyolefin / silicone rubber thermoplastic elastomers by dynamic vulcanization method, but the polyolefins reported in the above patents are polyethylene, polypropylene, polybutadiene, polyisobutylene, polyisoprene Less heat-resistant species such as olefins, resulting in poor heat resistance of polyolefin / silicone thermoplastic elastomers

Method used

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  • Poly4-methyl-1-pentene/silicone rubber thermoplastic elastomer, preparation and application thereof
  • Poly4-methyl-1-pentene/silicone rubber thermoplastic elastomer, preparation and application thereof
  • Poly4-methyl-1-pentene/silicone rubber thermoplastic elastomer, preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-7

[0024] The raw material compositions of Examples 1-7 are shown in Table 1, and the amounts of each component in Table 1 refer to parts by mass.

[0025] The raw materials used in Table 1 are described as follows: poly-4-methyl-1-pentene is a copolymer containing 4-methyl-1-pentene structural unit, its Vicat softening point is 140-169 ° C, and the melt index is 20 -220g / 10min (5kg, 260°C). The silicone rubber is methyl vinyl silicone rubber, and the vinyl molar content in the methyl vinyl silicone rubber is 0.2%. The sulfiding agent was Karstedt's catalyst with a platinum concentration of 500 ppm. White carbon black is fumed white carbon black. The structure control agent is hydroxy silicone oil. Hydrogen silicone oil is high hydrogen silicone oil.

[0026] Preparation steps: (1) Mix the methyl vinyl silicone rubber, fumed silica, structure control agent hydroxyl silicone oil, and high hydrogen silicone oil in the formula in Table 1 in an internal mixer to obtain the mixed ...

Embodiment 8

[0045] The materials used, proportioning and preparation steps are the same as in Example 2, except that poly-4-methyl-1-pentene is a homopolymer, its Vicat softening point is 160-180°C, and the melt index is 20-180g / 10min ( 5kg, 260°C).

Embodiment 9

[0047] The materials, proportions and preparation steps used are the same as those in Example 2, except that the silicone rubber is phenylvinyl silicone rubber, and the vinyl molar content in the phenylvinyl silicone rubber is 0.2%.

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Abstract

The invention discloses a poly4-methyl-1-pentene/silicone rubber thermoplastic elastomer. The thermoplastic elastomer is prepared from the following raw materials: poly4-methyl-1-pentene, silicone rubber, a vulcanizing agent, filler, a structure control agent and hydrogen-containing silicone oil. The invention also discloses a preparation method of the poly4-methyl-1-pentene/silicone rubber thermoplastic elastomer. The poly4-methyl-1-pentene with high heat resistance is adopted and subjected to dynamic vulcanization processing with silicone rubber in a melt blending state, and the poly4-methyl-1-pentene/silicone rubber thermoplastic elastomer is prepared. The thermoplastic elastomer has high heat resistance, high release property, weather resistance and chemical resistance, is suitable fora release film in a flexible printed circuit board production process, and can also be widely applied to the fields of electronics, food, medical treatment and the like.

Description

technical field [0001] The invention relates to a dynamically vulcanized thermoplastic elastomer, in particular to a poly 4-methyl-1-pentene / silicone rubber thermoplastic elastomer and its preparation and application. Background technique [0002] Poly-4-methyl-1-pentene is a polyolefin plastic with the lowest density. It has excellent heat resistance, chemical resistance, impact resistance, gas permeability and peelability, and is widely used in peeling materials. , food containers, medical equipment and other fields. However, its disadvantages are poor weather resistance, easy oxidation, and easy degradation and yellowing after being exposed to light radiation. [0003] The main chain of silicone rubber is composed of silicon atoms and oxygen atoms arranged alternately, and the side groups of silicon atoms are organic groups. Therefore, silicone rubber has both organic and inorganic properties, good weather resistance, excellent high and low temperature resistance, extre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/20C08L83/07C08L83/04C08L83/05C08K7/26C08K5/40C08K3/34C08K5/544
CPCC08L23/20C08L83/04C08L2203/16C08L2203/20C08L2201/08C08L2205/025C08L2205/035C08K7/26C08K5/40C08K3/34C08K5/544
Inventor 王果戴静
Owner 拓烯科技(衢州)有限公司
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