Single-component high temperature resistant deacidification type room-temperature vulcanized organosilicone sealant and preparation method thereof
A room temperature vulcanization, high temperature resistant technology, used in adhesives, non-polymer adhesive additives, adhesive additives, etc., can solve the problems of metal corrosion, high temperature degradation, etc., to achieve excellent high temperature resistance and degradation resistance, excellent high temperature resistance Anti-degradation properties, the effect of avoiding catalytic snap-off degradation
Inactive Publication Date: 2019-01-22
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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Problems solved by technology
The one-component room temperature vulcanizing silicone sealants currently used in my country's projects are deketoxime type, deacidification type and dealcoholization type. Among them, the deacidification type one-component room temperature vulcanization silicone sealant is bonded to substrate It has the best performance, high temperature resistance and storage stability, but there are also disadvantages in terms of metal corrosion and high temperature degradation
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[0021] Below in conjunction with embodiment technical solution of the present invention will be described in further detail:
[0022] The α, ω-dihydroxy liquid polysiloxane, crosslinking agent, reinforcing filler, high temperature degradation inhibitor, high temperature antioxidant, tackifier and catalyst used in the technical solution of the present invention and their consumption are as shown in Table 1 Show.
[0023] In the following, the technical solution of the present invention will be described in detail by taking the preparation of one-component high temperature resistant deacidification type room temperature vulcanizing silicone sealant with the components of No. 1 in Table 1 as an example. The method steps of preparation are as follows:
[0024] Weigh the components according to the ratio, first put 100 parts by mass of α,ω-dihydroxypolydimethylsiloxane and 5 parts by mass of methyltriacetoxysilane into a vacuum kneader, and heat to 60 ℃ ~ 70 ℃ and vacuumize to 0....
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Abstract
The invention relates to a one-component high temperature resistant deacidification type room-temperature vulcanized organosilicone sealant and a preparation method thereof. the sealant is prepared byusing alpha, omega-dihydroxy liquid polysiloxane as base rubber, an acyloxysilane crosslinking agent as a crosslinking agent, modified white carbon black as a reinforcing filler, amphoteric metal oxide as a high temperature degradation inhibitor, metallic oxide as a high temperature antioxidant, acyloxysilane or epoxy alkoxy silane or methacryloxysilane as a tackifier and a tin-based compound asa catalyst. The one-component high temperature resistant deacidification type room-temperature vulcanized organosilicone sealant has excellent resistance to high temperature and degradation, high elongation at break and storage stability, and has good bonding property to a metal substrate.
Description
technical field [0001] The invention relates to a single-component high temperature resistant deacidification type room temperature vulcanized silicone sealant and a preparation method thereof, belonging to the technical field of polymer materials and their production. Background technique [0002] One-component condensation type room temperature vulcanizing silicone sealant is the most common and most used room temperature vulcanizing silicone sealant. widely used. One-component condensation type room temperature vulcanizing silicone sealants can be divided into deketoxime type, deacidification type, dealcoholization type, acetone removal type and deamidation type according to different crosslinking agents. The one-component room temperature vulcanizing silicone sealants currently used in my country's projects are deketoxime type, deacidification type and dealcoholization type. Among them, the deacidification type one-component room temperature vulcanization silicone seala...
Claims
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IPC IPC(8): C09J183/04C09J11/04C09J11/06
CPCC08K2003/2213C08K2003/2227C08K2003/2241C08K2003/2251C08K2003/2272C08K2003/2296C09J11/04C09J11/06C09J183/04C08K13/06C08K3/36C08K3/22C08K5/5419C08K5/5425
Inventor 孙全吉王磊任河张鹏王利娜
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS