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Two-component condensed silicone adhesive, composition forming same, and use thereof
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A silicone adhesive, condensation-type technology, applied in the direction of adhesives, polymer adhesive additives, non-polymer adhesive additives, etc., can solve the problems of fast curing, fast bonding performance, anti-aging performance and lack of elongation
Active Publication Date: 2020-07-03
富乐(苏州)新材料有限公司
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[0004] The main purpose of the present invention is to provide a two-component condensation type silicone adhesive, its composition and its application, so as to solve the problems of the existing condensation type two-component silicone rubber in fast curing, fast bonding performance, anti-aging, etc. There are still deficiencies in performance and elongation
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[0024] In a preferred embodiment, the preparation method of the hydrate of trialkoxysilane a and dialkoxysilane without amino group comprises: adding trialkoxysilane a and dialkoxysilane according to a predetermined ratio Put it into the reaction vessel, fill it with nitrogen for protection, stir evenly, control the temperature of the mixture at 20-30°C, add tin catalyst, stir rapidly, control the temperature of the system at 20-40°C, add deionized water dropwise within 1-1.5h Into the reaction system, the temperature was raised to reflux, kept for 2 hours, and the co-hydrolyzed product was obtained after cooling down. Preferably, the catalyst is used in an amount of 0.2-0.35%, more preferably 0.23%, 0.25%, and 0.3%, as a percentage of the total weight of trialkoxysilane and amino group-free dialkoxysilane.
[0025] Preferably, the amount of deionized water is 7-8%, more preferably 7.2%, 7.5%, 7.7%, based on the percentage of the total weight of trialkoxysilane and dialkoxysil...
Embodiment 1
[0091] (1) Preparation of the second component
[0092] 100 parts of 1000cp methyl silicone oil, 30 parts of hexamethyldisilazane-treated fumed silica, 20 parts of methyltrimethoxysilane, 25 parts of XL-1, 30 parts of P-1, dilauric acid 0.2 part of dibutyltin, mixed evenly in a planetary stirring kettle.
[0093] (2) Preparation of two-component condensation type silicone adhesive
[0094] The above-mentioned catalytic cross-linking agent (the second component) is mixed with the main agent A1 (the first component), and the weight ratio of the catalytic cross-linking agent / main agent is 1:10, and the two-component silicone rubber performance is tested. Test data As in Table 1.
Embodiment 2
[0096] (1) Preparation of the second component
[0097] 100 parts of 1000cp methyl silicone oil, 20 parts of fumed silica treated with hexamethyldisilazane, 10 parts of titanium dioxide, 25 parts of methyltriethoxysilane, 25 parts of XL-1, and 25 parts of P-2 25 parts, 0.3 part of dibutyltin dilaurate, mix them evenly in the planetary stirring kettle.
[0098] (2) Preparation of two-component condensation type silicone adhesive
[0099] The above-mentioned catalytic cross-linking agent (the second component) is mixed with the main agent A1 (the first component), and the weight ratio of the catalytic cross-linking agent / main agent is 1:10, and the two-component silicone rubber performance is tested. Test data As in Table 1.
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Abstract
The invention provides a two-component condensed type organic siliconadhesive, a composition for forming the two-component condensed type organic siliconadhesive and an application of the two-component condensed type organic siliconadhesive. The two-component condensed type organic silicon adhesive comprises a first component and a second component, the first component comprises polysiloxane with hydroxyl groups bonded to silicon atoms and water, the second component comprises a first diluent, a first co-hydrolysate, a second co-hydrolysate and a catalyst, the first co-hydrolysate is a co-hydrolysate of trialkoxysilane a and amino-free dialkoxysilane, and the second co-hydrolysate is a co-hydrolysate of an amino silanecoupling agent and trialkoxysilane b. The bi-component condensed type organic silicon adhesive prepared from the composition has the advantages of being high in curing speed, good in elongation, good in adhesive property within a short time, resistant to aging and thelike.
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