A kind of rubber internal release agent and preparation method thereof
An internal release agent and rubber technology, applied in the field of rubber additives, can solve problems such as sticking and affecting the appearance properties of rubber products, and achieve the effect of good appearance quality and good internal lubrication and flow performance.
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[0032] A preparation method of a rubber internal mold release agent, comprising the following steps:
[0033] 1) Preparation of matrix component A: stearic acid, zinc compound, stearic acid amide and paraffin are respectively weighed according to their parts by weight; stearic acid is added to the reactor, heated and melted, and continuously stirred; then add The zinc compound is continued to be stirred; then the stearic acid amide and the paraffin are added in turn, and the stirring is continued to obtain a clear and translucent matrix component A;
[0034] 2) Preparation of modified component B: the modifier is added to the solvent, and then heated to 60-70 ° C, so that the modifier is completely dissolved; then add nano-calcium carbonate and emulsifier, and continue to stir until the dispersion is uniform. Active nano calcium carbonate emulsion, this is modified component B;
[0035] 3) Mix the matrix component A and the modified component B to prepare the rubber internal ...
experiment example
[0053] Use the rubber internal mold release agent prepared in Example 1 to Example 10 and Comparative Example 1 to Comparative Example 6 to be added to the rubber compound for use, and the addition amount is the rubber internal mold release agent: The rubber compound is 1: 100; Made into rubber strips, according to GB / T12829-2006, the strips were subjected to a tear strength test to judge their hot tear strength performance; the test results are shown in Table 3: Among them, Comparative Example 7 is the existing Rubber products normally used in technology;
[0054] Table 3 embodiment and the demoulding effect statistics table of comparative example
[0055]
[0056]
[0057] It can be seen from the experimental data in Table 3 that the rubber internal mold release agent of the present invention can be used in the rubber compound, which can effectively improve the tear strength of the rubber compound, thereby enhancing the hot tear strength performance of the rubber compo...
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