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A two-component adhesive, curing speed technology, applied in the direction of adhesives, non-polymer adhesive additives, adhesive additives, etc. The effect of improvement, adhesion performance improvement, and light transmittance improvement
Active Publication Date: 2021-04-30
GUANGZHOU GLORYSTAR CHEM
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However, due to the two-component ratio of the ratio, the user must accurately adopt a ratio of 10:1 to achieve the best mechanical and adhesive properties. However, when the temperature changes with the environmental conditions, the catalytic activity of the catalyst changes with the temperature. As a result, the vulcanization speed of silicone rubber changes with environmental changes. When the ratio of component A and component B needs to be adjusted with temperature changes to adjust the construction progress, the mechanical and adhesive properties of the two-component adhesive will change. Poor, therefore, room for improvement
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Embodiment 1
[0061] A two-component adhesive with adjustable curing speed, including A component and B component, wherein, A component
[0063] In component A, the plasticizer is a compound of dimethyl silicone oil and benzyl silicone oil;
[0064] The crosslinking agent is a compound of dodecyltrimethoxysilane and phenyltributanoximinosilane;
[0065] The filler is a compound of fumed white carbon black, activated calcium carbonate, and fused silica powder;
[0066] The coupling agent is a compound of aminopropyltrimethoxysilane and aminopropyltriethoxysilane.
[0067] The B component includes catalyst and plasticizer.
[0068] In component B, the catalyst is 2,2,2-nitrilotriethyl titanate;
[0069] The plasticizer is a compound of dimethyl silicone oil and benzyl silicone oil.
[0070] In Examples 1-3, the addition amount of each component is shown in Table 1 (in kg).
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Embodiment 4
[0079] Compared with Example 3, the only difference is that the catalyst is butyl tin trichloride.
Embodiment 5
[0081] Compared with Example 3, the only difference is that the catalyst is n-octyltin.
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Abstract
The invention relates to the field of silicone rubber, and particularly discloses a curing-speed-adjustable two-component adhesive which comprises a component A and a component B. The component A and the component B are mixed in any proportion, and the component A comprises the following components in parts by mass: 100 parts of alpha,omega-dihydroxy polydimethylsiloxane, 30-40 parts of a plasticizer, 2.5-5 parts of a cross-linking agent, 100-120 parts of a filler, and 2-6 parts of a coupling agent, wherein the viscosity range of the alpha,omega-dihydroxy polydimethylsiloxane at the temperature of 25 DEG C is 10,000 mPa*s to 50,000 mPa*s; the component B comprises the following components in parts by mass: 10-15 parts of a plasticizer, and 0.1-1 part of a catalyst. The preparation method disclosed by the invention has the advantage of reducing the influence of a user on the mechanical property of silicone rubber when the vulcanization speed of the silicone rubber is adjusted.
Description
technical field [0001] This application relates to the field of silicone rubber, more specifically, it relates to a two-component adhesive with adjustable curing speed. Background technique [0002] Room temperature vulcanized silicone rubber is a new type of silicone elastomer that came out in the 1960s. Because this rubber can be cured in situ without heating or pressure at room temperature, it is extremely convenient to use. Therefore, room temperature vulcanized rubber has become a silicone product. important parts of. [0003] Two-component room temperature vulcanized silicone rubber is the most popular type of room temperature vulcanized rubber. The existing formula of two-component room temperature vulcanized silicone rubber includes A component and B component with a mass ratio of 10:1. Among them, A group Divided into base rubber, component B is catalyst, crosslinking agent, coupling agent and other additives. In the actual use process, due to the temperature diff...
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