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A dual-cure, silicone technology, applied in the direction of adhesive additives, non-polymer adhesive additives, adhesives, etc., can solve problems such as difficult and fast deep curing, and worrying storage stability
Active Publication Date: 2017-12-29
富乐(苏州)新材料有限公司
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For example, patent CN105348813A proposes a moisture-heat-curable one-component silicone, but it is difficult to
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Embodiment 1
[0031] Component A consists of 100 parts of vinyl-terminated polydimethylsiloxane with a viscosity of 10000mPa·s and a vinyl content of 0.15%, and 10 parts of a silicon hydrogen group-containing polydimethylsiloxane with a viscosity of 1000mPa·s and a hydrogen content of 0.2%. Methyl polysiloxane, 50 parts of light calcium carbonate, 8 parts of methyltrimethoxysilane, 1 part of bis(3-trimethoxysilylpropyl)amine.
[0032] Component B consists of 100 parts of hydroxyl-terminated polydimethylsiloxane with a viscosity of 3000mPa·s, 10 parts of carbon black, 0.5 parts of ethynyl cyclohexanol, and 4 parts of tetramethyldichloroplatinic acid with a platinum content of 2000ppm. Vinyl disiloxane complex, 0.5 part moisture.
[0033] The weight ratio of A component and B component is 1.1:1, and the volume ratio is 1:1.
[0034] The mixture is heated at 100°C for 10 minutes to form a silicone rubber elastomer and bond simultaneously. It has cohesive bonding failure for aluminum alloy and...
Embodiment 2
[0039] Component A consists of 100 parts of vinyl-terminated polydimethylsiloxane with a viscosity of 20000mPa·s and a vinyl content of 0.10%, and 20 parts of a silicon hydrogen-containing polydimethylsiloxane with a viscosity of 5000mPa·s and a hydrogen content of 0.15%. Methylpolysiloxane, 100 parts of alumina powder, 6 parts of ethyltrimethoxysilane, 1 part of N-n-butylaminopropyltrimethoxysilane.
[0040] Component B consists of 100 parts of hydroxyl-terminated polydimethylsiloxane with a viscosity of 5000mPa·s, 50 parts of heavy calcium carbonate, 0.4 parts of 2-ethyn-1-ol, and 8 parts of chloroplatinic acid with a platinum content of 2000ppm Tetramethyldivinyldisiloxane complex, 1 part moisture.
[0041] The weight ratio of A component and B component is 2.3:1, and the volume ratio is 2:1.
[0042] The mixture is heated at 120°C for 5 minutes to form a silicone rubber elastomer, which has cohesive bonding failure to aluminum alloy, stainless steel and other metal materi...
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Abstract
The invention provides a dual-component dual-curing organic silicon composition which consists of a component A and a component B. The component A comprises vinyl-containing poly dimethyl organosiloxane, silicon hydrogen radical-containing methylpolysilicone and a cross-linking agent, and the component B comprises hydroxyl-terminated polydimethylsiloxane and a platinum catalyst, wherein the weight ratio of the component A to the component B is from (1:1) to (10:1). A dual-component dual-vulcanization silicone rubber composition provided by the invention can be rapidly vulcanized into a silicone rubber elastomer in a heating condition, can have excellent bonding force to a base material so as to realize cohesive failure, and the bonding strength is greater than or equal to 1.0MPA; the dual-component dual-vulcanization silicone rubber composition also has a vulcanized speed equal to dual-component room temperature vulcanized silicone rubber and forms bonding force quickly. The proportion of the component A and the component B is changeable within a certain scope to adjust the vulcanized speed, and the proportion can be adjusted according to the on-site working condition requirement of customers so as to adapt to customer requirement.
Description
technical field [0001] The invention belongs to the field of adhesives, in particular to an organosilicon compound. Background technique [0002] Silicone rubber is divided into condensation type and addition type according to the vulcanization reaction mechanism; condensation type silicone rubber is divided into deacidification type, deoxime type, dealcoholization type, deamination type, deamidation type and deacetone type according to the type of vulcanization reaction products. And many other varieties. Addition-type silicone rubber does not generate small molecular substances during the vulcanization reaction. Condensed silicone rubber is divided into one-component room temperature vulcanized silicone rubber and two-component room temperature vulcanized silicone rubber; the vulcanization time of one-component room temperature vulcanized silicone rubber depends on the vulcanization system, temperature, humidity and the thickness of the silicone rubber layer. The tempera...
Claims
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