Closed-cell two-step foamed material prepared from styrene butadiene rubber, natural rubber, butadiene rubber and high styrene resin, and preparation method of closed-cell two-step foamed material

Abstract

The invention relates to the technical field of foam materials and provides a closed-cell two-step foamed material prepared from styrene butadiene rubber, natural rubber, butadiene rubber and high styrene resin, and a preparation method of the closed-cell two-step foamed material. The closed-cell two-step foamed material retains the relatively good elasticity, wear resistance, fracturing resistance and slippery resistance of the styrene butadiene rubber; the addition of the natural rubber improves the rebound resilience, elongation, tensile strength and tear strength of the material; the cold resistance, wear resistance and elasticity of the material are particularly excellent and heat generated under live load is less due to the addition of butadiene rubber; the use of the high styrene resin improves the mechanical rigidity, hardness and stiffness of products, and makes up the cold flow property of the butadiene rubber at normal temperature. The produced product is remarkable in properties such as cold resistance (the lowest temperature reaches -100 DEG C), embossing and the like, and is free of toxicity, odorless and pollution. During the preparation, firstly, the natural rubber is masticated separately, and the high styrene resin and the natural rubber are blended in a ratio of 1:1; and then the two premixed rubbers are blended with styrene butadiene rubber and butadiene rubber, and the process of rolling and standing is carried out, so that the difficulty that the three types of rubber resins are poor in compatibility is overcome.

Description

technical field [0001] The invention relates to the technical field of foaming materials, in particular to a closed-cell secondary foaming material combined with styrene-butadiene rubber, natural rubber, butadiene rubber and high-styrene resin and a preparation method thereof. Background technique [0002] With the maturity of domestic production technology, styrene-butadiene rubber has been widely used in various industries. It has good elasticity, wear resistance, crack resistance, wet skid resistance and price advantages and has become the mainstream rubber type. Low strength, chemical and weather resistance, poor embossing and shaping; natural rubber has good resilience, elongation, tensile strength, and tear strength, but in terms of shortcomings, embossing and plasticity are not good. Good, basically similar to styrene-butadiene rubber; butadiene rubber has very excellent cold resistance (-100°C) elasticity and wear resistance, but poor processability alone, and has a ...

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Problems solved by technology

[0002] With the maturity of domestic production technology, styrene-butadiene rubber has been widely used in various industries. It has good elasticity, wear resistance, crack resistance, wet skid resistance and price advantages and has become the mainstream rubber type. Low strength, chemical and weather resistance, poor embossing and shaping; natural rubber has good resilience, elongation, tensile strength, and tear strength, but in terms of shortcomings, embossing and plasticity are not good. Good, basically similar to styrene-butadiene rubber; butadiene rubber has very excellent cold resistance (-100°C) elasticity and wear resistance, but poor processability alone, and has a tendency to cold flow; high styrene resin has excellent mechanical stiffness in recent years , wear resistance, etc. are widely used in the field of shoe material foaming materials, but high styrene resin products also have the disadvantages of poor softness and large shrinkage, and they are all one-time vulcanized products with low technological level. In terms of solubility, since the first three belong to rubber materials, while the latter is a thermoplastic elastomer, it is a big difficulty for foamed materials to have poor dispersion after processing and integration. How to improve the process to improve dispersion is good, low cost, and low cost. Good cold resistance, high resilience, high tensile strength, high tear strength, product embossing and other surface treatment wear-resistant, anti-slip comprehensive physical properties, so as to broaden the scope of application, a breakthrough is needed

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