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
A high-styrene resin and natural rubber technology, applied in the field of foaming materials, can solve chemical weather resistance, poor embossing and shaping, low tensile and tear strength, embossing, poor plasticity, etc. problems, to achieve the effect of wide cold resistance, outstanding performance and low cost
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[0044] The material source specifications used in Example 1 and Example 2 are shown in Table 1 below:
[0045]
[0046] Table 1. Specifications of each raw material source
[0047] Example 1
[0048] The preparation method of the closed-cell secondary foaming material of styrene butadiene rubber, natural rubber, butadiene rubber and high styrene resin includes the following steps:
[0049] (1) Mixing rubber G mastication: Put 100PHR of high styrene resin, 100PHR of natural rubber, and 0.2PHR of stearic acid into a 75L diamond-shaped shaft W type heavy hammer internal mixer, pressurize to 7 kg, and knead Mix for 8 minutes, and continue to fill with cold water to cool down during the kneading process. When the temperature reaches 110℃, the material is discharged to obtain compound G; put compound G into an 18-inch automatic turning mill, the temperature is controlled at 80℃, 2mm turning Material for 180 seconds, the thickness of 2mm is fluttered and cut into the corresponding weight, r...
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[0058] Example 2
[0059] The preparation method of the closed-cell secondary foaming material of styrene butadiene rubber, natural rubber, butadiene rubber and high styrene resin includes the following steps:
[0060] (1) Mixing rubber G mastication: Put 100PHR of high styrene resin, 100PHR of natural rubber, and 0.1PHR of stearic acid into a 75L diamond-shaped shaft W type heavy hammer internal mixer, pressurize to 7 kg, and knead Mix for 8 minutes, and continue to fill with cold water to cool down during the kneading process. When the temperature reaches 115℃, the material is discharged to obtain compound G; put compound G into an 18-inch automatic turning mill, the temperature is controlled at 85℃, 2mm turning Material for 180 seconds, the thickness of 2mm is fluttered and cut into the corresponding weight, respectively, stand for treatment;
[0061] (2) Natural rubber mastication: Put 100PHR of natural rubber and 0.1PHR of stearic acid into a 75L diamond-shaped shaft W-type hea...
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