High-dispersity silica gel foaming agent and preparation method thereof
A high-dispersion silica gel and foaming agent technology, which is applied in the preparation of foaming agents, high-dispersion silica gel foaming agents and their preparation fields, can solve the problems of high risk, easy agglomeration, poor dispersibility, etc., and achieve safety Enhanced performance, fine cell structure, particle size reduction
Active Publication Date: 2020-01-17
浙江杰上杰新材料股份有限公司
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Problems solved by technology
[0014] The object of the present invention is to provide a kind of highly dispersible silica gel foaming agent, and this foaming agent is made by modification of azobisisobutyronitrile, to solve the high risk of azobisisobutyronitrile powder as foaming agent, Technical defects such as easy agglomeration and poor dispersion
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Embodiment 1-3
[0037] A kind of highly dispersed silica gel foaming agent, this foaming agent is made by mixing the components shown in Table 1:
[0038] Table 1 (unit: kg)
[0039]
[0040] The specific steps of the preparation method of highly dispersible silica gel blowing agent are as follows:
[0041] (1) Azobisisobutyronitrile and the release agent are mixed uniformly in a fluidized bed;
[0042] (2) Carry out deep crushing to the mixed powder in the step (1) with the jet pulverizer that nitrogen protection is housed, control median particle diameter to be 5-20 micron;
[0043] (3) The azobisisobutyronitrile ultrafine powder obtained in step (2) is passed into the fluidized bed from the bottom, and then the liquid dispersant is atomized and sprayed down from the top of the fluidized bed to obtain fully wetted and dispersed wet powder,
[0044] (4) Mix the wet powder obtained in step (3) and the silicone rubber evenly with a banbury mixer. The silicone rubber is a high-temperature v...
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Abstract
The invention relates to a preparation method of a foaming agent, in particular to a high-dispersity silica gel foaming agent and a preparation method thereof, and belongs to the technical field of rubber preparation. The high-dispersity silica gel foaming agent is prepared by mixing the following components of 100 parts of azodiisobutyronitrile, 1-20 parts of a separant and 5-20 parts of a liquiddispersant. Through the preparation method disclosed by the invention, the agglomeration and caking problems of the foaming agent after jet milling are greatly reduced by adding the separant into theazodiisobutyronitrile before the jet milling; and meanwhile, the mixing of the separant and the azodiisobutyronitrile after co-crushing is more uniform, the granularity of the separant is also greatly reduced, and the filling and reinforcing effects on high-temperature vulcanized silicone rubber by the separant are improved; and furthermore, the addition of the separant reduces the concentrationof the azodiisobutyronitrile, so that the safety of the foaming agent is improved to a certain extent.
Description
technical field [0001] The invention relates to a preparation method of a foaming agent, in particular to a highly dispersible silica gel foaming agent and a preparation method thereof, belonging to the technical field of rubber preparation. Background technique [0002] Silicone rubber is a linear organic compound composed of alternating silicon-oxygen bonds (Si-O) to form the main chain, and organic groups (such as methyl, ethyl, vinyl, phenyl, trifluoropropyl, etc.) to form side groups. Silicone polymer. Due to its special structure, silicone rubber has many excellent properties that many other materials can have at the same time, such as excellent high temperature and low temperature resistance, excellent oil resistance, solvent resistance, UV resistance, radiation resistance, and good aging resistance. , Excellent electrical insulation and chemical stability and physiological inertia. [0003] The silicone porous elastomer prepared after foaming is silicone rubber foa...
Claims
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IPC IPC(8): C08J9/10C08L83/04
CPCC08J9/102C08J2203/04C08J2383/04
Inventor 罗李华
Owner 浙江杰上杰新材料股份有限公司