Preparation method of rubber foaming material with bubble inner wall shell

A technology of rubber foam material and air bubbles, which is applied in the field of preparation of high-performance rubber foam materials, can solve the problems of industrial production difficulties, reduce the mechanical properties of foam materials, insufficient rigidity and dimensional stability of thermoplastic polymers, and achieve enhanced Dimensional stability and effect on mechanical properties

Pending Publication Date: 2020-09-25
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since the rigid strength of thermoplastic polymers that can be processed and foamed with rubber is not enough to solve the problem of dimensional stability
However, the introduction of a large numbe

Method used

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  • Preparation method of rubber foaming material with bubble inner wall shell

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preparation example Construction

[0019] The present invention relates to a kind of preparation method of rubber foaming material with bubble inner wall, comprising the following steps:

[0020] (1) The styrene-butadiene rubber / ethylene-vinyl acetate copolymer of 100 weight parts and the white carbon black of 5.0-20.0 weight parts, the solid paraffin of 3.0-6.0 weight parts and the stearic acid of 1.0-5.0 weight parts are in internal mixer Mix well and evenly;

[0021] (2) the zinc oxide of 5.0-15.0 weight part and the epoxy resin of 0.5-5.0 weight part are fully mixed in internal mixer again;

[0022] (3) Then add 0.5-5.0 parts by weight of foaming agent 4,4'-oxobisbenzenesulfonyl hydrazide, 0.1-1.5 parts by weight of dicumyl peroxide and 0.1-1.5 parts by weight of sulfur to the banburying In the machine, knead the mixture;

[0023] (4) Thinning the mixture obtained in step (3) on an open two-roller kneader several times and making a triangular bag to obtain a blended rubber;

[0024] (5) Heat the mold of ...

Embodiment 1

[0028] (1) The ethylene-vinyl acetate copolymer of 30.0 parts by weight, the styrene-butadiene rubber of 70.0 parts by weight, the white carbon black of 15.0 parts by weight, the paraffin wax of 5.0 parts by weight and the stearic acid of 3.0 parts by weight are fully The mixing is uniform, the banburying temperature is 100°C, the banburying time is 10min, and the rotation speed is 30rpm;

[0029] (2) fully mix the zinc oxide of 5.0 weight parts in internal mixer again;

[0030] (3) Then 2.0 parts by weight of blowing agent 4,4'-oxobisbenzenesulfonyl hydrazide, 0.8 parts by weight of dicumyl peroxide and 0.5 parts by weight of sulfur are added to the internal mixer, and mixed to obtain mixture;

[0031] (4) Pass the mixture obtained in step (3) repeatedly on an open double-roller mixer and make a triangular bag to obtain the blended rubber for subsequent use;

[0032] (5) Heat the vulcanizer mold to 175°C in advance, then put the prepared blended rubber into the mold, pressu...

Embodiment 2

[0035] (1) The ethylene-vinyl acetate copolymer of 30.0 parts by weight, the styrene-butadiene rubber of 70.0 parts by weight, the white carbon black of 15.0 parts by weight, the paraffin wax of 5.0 parts by weight and the stearic acid of 3.0 parts by weight are fully The mixing is uniform, the banburying temperature is 100°C, the banburying time is 10min, and the rotation speed is 30rpm;

[0036] (2) the zinc oxide of 5.0 parts by weight and the epoxy resin of 1.0 parts by weight are fully mixed evenly in internal mixer;

[0037] (3) Then 2.0 parts by weight of blowing agent 4,4'-oxobisbenzenesulfonyl hydrazide, 0.8 parts by weight of dicumyl peroxide and 0.5 parts by weight of sulfur are added to the internal mixer, and mixed to obtain mixture;

[0038] (4) Pass the mixture obtained in step (3) repeatedly on an open double-roller mixer and make a triangular bag to obtain the blended rubber for subsequent use;

[0039] (5) Heat the mold of the vulcanizer to 170°C in advance...

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Abstract

The invention relates to a preparation method of a rubber foaming material with a bubble inner wall shell. In order to improve the dimensional stability of the rubber foam material, a thermoplastic polymer and inorganic particles (including spheres, rods and sheets) are usually added into a foam matrix to construct a scaffold structure for hindering molecular chain recovery; since the rigid strength of the thermoplastic polymer that can be processed and foamed together with rubber is insufficient to solve the problem of its dimensional stability. A large number of inorganic particles are introduced, so that the mechanical property of the foaming material is reduced, and meanwhile, organic modification needs to be carried out, which brings difficulty to industrial production. According to the invention, styrene butadiene rubber and an ethylene-vinyl acetate copolymer are used as foaming matrixes, and a small amount of epoxy resin is introduced to regulate and control zinc oxide to be compactly and uniformly dispersed on the inner walls of bubbles to form a layer of inner shell structure; the size stability and the mechanical property of the foaming material are enhanced.

Description

technical field [0001] The invention relates to the preparation of a high-performance rubber foam material, in particular to a preparation method of a rubber foam material with bubble inner walls and shells. Background technique [0002] Rubber foam materials have the characteristics of low cost, light weight, high elasticity, softness and durability, and are widely used in industries such as sporting goods, soft decoration, construction and thermal insulation. Due to the inherent elasticity and low rigidity of rubber, its dimensional stability after foaming is poor. For example, the size of the product prepared in industrial production is 100*100cm, due to the high shrinkage rate, its size becomes 9*9cm, which will greatly reduce the yield and increase the cost. It has been found through research that the low dimensional stability of rubber foamed materials is caused by its difficulty in crystallization and the internal stress caused by stretched molecular chains and rapid...

Claims

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Application Information

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IPC IPC(8): C08L9/06C08L23/08C08L63/00C08L91/06C08K13/02C08K3/36C08K5/09C08K3/22C08K3/06C08K5/14C08J9/10
CPCC08J9/105C08J9/0095C08J9/0066C08J9/0061C08J9/0023C08J2309/06C08J2423/08C08J2463/00C08J2491/06C08K13/02C08K3/36C08K5/09C08K2003/2296C08K3/06C08K5/14C08J2203/04
Inventor 邵亮姬占有马建中王慧迪
Owner SHAANXI UNIV OF SCI & TECH
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