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Rubber internal releasing agent and preparation method thereof

An internal release agent and rubber technology, applied in the field of rubber additives, can solve problems such as adhesion and affecting the appearance of rubber products, and achieve the effect of smooth surface, good internal lubrication and fluidity, and smooth and complete surface

Active Publication Date: 2021-01-26
ZHEJIANG WEIXIANG TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The publication number is that CN104693813A discloses a kind of fatty acid zinc soap rubber internal release agent in the patent application document, comprises stearic acid, zinc compound, stearic acid amide, paraffin and diethylene glycol ether; The problem of the mold, but it will cause slight adhesion during the demoulding process, which will affect the appearance of the rubber product

Method used

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  • Rubber internal releasing agent and preparation method thereof
  • Rubber internal releasing agent and preparation method thereof
  • Rubber internal releasing agent and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0032] A preparation method of a rubber internal mold release agent, comprising the following steps:

[0033] 1) Prepare matrix component A: weigh stearic acid, zinc compound, stearic acid amide and paraffin wax according to their parts by weight; add stearic acid into the reaction kettle, heat and melt, and continue to stir; then add The zinc compound continues to stir; then add stearic acid amide and paraffin in turn, and continue to stir to obtain a clear and translucent matrix component A;

[0034] 2) Preparation of modified component B: Add the modifier to the solvent, and then heat it to 60-70°C to dissolve the modifier completely; then add nano-calcium carbonate and emulsifier, and keep stirring until it is uniformly dispersed Active nanometer calcium carbonate emulsion, this is modified component B;

[0035] 3) Prepare the rubber internal release agent by mixing the base component A and the modified component B: slowly add the modified component B into the base compon...

experiment example

[0053] Use the rubber internal mold release agent made in embodiment 1 to embodiment 10 and comparative example 1 to comparative example 6 to join in the rubber compound and use, the addition is rubber internal mold release agent: rubber compound is 1: 100; made rubber strips, according to GB / T12829-2006, the strips are subjected to tear strength test, in order to judge its hot tear strength performance; the test results are as shown in table 3: wherein, comparative example 7 is the existing Rubber products for technical normal use;

[0054] Table 3 embodiment and the release effect statistical table of comparative example

[0055]

[0056]

[0057] As can be seen from the experimental data in Table 3, the rubber internal release agent of the present invention is 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 compound, so that the rubber compound Easie...

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Abstract

The invention provides a rubber internal releasing agent and a preparation method thereof. The rubber internal releasing agent is prepared from a matrix component A and a modified component B according to the mass ratio of 1: (0.4-0.6), wherein the matrix component A comprises 40-65 parts of stearic acid, 10-30 parts of a zinc compound, 35-45 parts of octadecanamide and 9-15 parts of paraffin; andthe modified component B is prepared from nano calcium carbonate, a solvent, a modifier and an emulsifier in a weight ratio of 1: 1: (0.4-0.6): (0.5-0.7). The matrix component A and the modified component B in the rubber internal release agent cooperate with each other, so that the fluidity of a rubber material can be improved, and the internal lubricating fluidity of the rubber material is good;the surface of the prepared rubber product has a self-cleaning effect, the rubber product can be conveniently demoulded and separated from a mould, and the demoulded rubber product is smooth and complete in surface and good in appearance quality.

Description

technical field [0001] The invention belongs to the field of rubber additives, in particular to a rubber internal release agent and a preparation method thereof. Background technique [0002] The release agent is a functional substance between the mold and the rubber product. Its function is to prevent the rubber product from sticking to the mold, causing serious appearance defects of the rubber product, and preventing the pollution of the vulcanized mold. The release agent can help the rubber product to be taken out of the mold smoothly, ensure the appearance of the product is qualified, reduce the loss of waste products, and improve production efficiency and economic benefits. [0003] The mold release agent can be divided into two types, one is the external spraying type, which is directly sprayed on the vulcanization mold. Due to the use of powder as a carrier, the environmental pollution of the workshop is serious and the cost is high; one is the release agent for rubb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L91/06C08K13/02C08K5/09C08K3/26C08K3/22
CPCC08K13/02C08K5/09C08K3/26C08K3/22C08K2201/011C08K2003/265C08K2003/2296C08L91/06
Inventor 张立王廷山戴圣佳陶莉
Owner ZHEJIANG WEIXIANG TECH GRP CO LTD