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A kind of deoximation type room temperature curing silicone rubber produced without butanone oxime and its preparation method
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A room temperature curing, butanone oxime-free technology, which is applied in the field of silicone rubber production, can solve the problems of high bonding strength on the sprayed surface, and achieve the effects of excellent comprehensive performance, simple preparation method and strong bonding performance.
Active Publication Date: 2021-01-05
ZHEJIANG QUZHOU GUIBAO CHEM
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Problems solved by technology
[0004] Aiming at the problem that the existing ketoxime type room temperature curing rubber produces harmful butanone oxime by-products during vulcanization, the purpose of the present invention is to provide a deoxime type room temperature curing silicone rubber without butanone oxime. The by-product produced during vulcanization of cured silicone rubber is acetone oxime, which is mild in nature and has no risk of carcinogenicity. Moreover, the deoxime-type room-temperature-cured silicone rubber has good bonding performance and has a large bond strength to the sprayed surface.
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preparation example Construction
[0024] The preparation method of the deoximation type room temperature curing silicone rubber produced without butanone oxime of the present invention comprises the following steps:
[0025] (1) Weigh the hydroxyl-terminated polysiloxane, plasticizer, filler, and pigment respectively, add them into a planetary mixer or a kneader, and stir in a vacuum for 30 to 60 minutes;
[0026] (2) Weigh the acetoxime silane and add it, and continue vacuum stirring for 30 to 60 minutes;
[0027] (3) Weighing the silane coupling agent and adding the catalyst, stirring in vacuum for 30-60 minutes, and packing under the protection of nitrogen to obtain a room temperature curing silicone rubber compound.
Embodiment 1
[0029] Deoxime type room temperature curing silicone rubber produced without butanone oxime, its formula consists of 40g of hydroxyl-terminated polysiloxane, 3g of crosslinking agent, 1g of silane coupling agent, 5g of plasticizer, 0.1g of catalyst, 10g of filler, pigment 1g is obtained by mixing, wherein the crosslinking agent is methyltriacetoneximosilane in acetoneximosilane, the silane coupling agent is aminosilane coupling agent, the plasticizer is silicone oil, the catalyst is organotin catalyst, and the filler is carbonic acid A mixture of calcium and silica. Its preparation method is as follows:
[0030] (1) Add the hydroxyl-terminated polysiloxane, plasticizer, filler and pigment into a planetary mixer or kneader, and stir in vacuum for 30 minutes;
[0031] (2) Take methyl triacetone oximino silane and add, continue vacuum stirring for 30 minutes;
[0032] (3) Weighing the silane coupling agent and adding the catalyst, stirring in vacuum for 30 minutes, and packing ...
Embodiment 2
[0034] The deoxime-type room-temperature-curing silicone rubber produced without butanone oxime is different from Example 1 in that the acetoxime silane used is vinyltriacetone xime silane.
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Abstract
The invention relates to the technical field of production of silicone rubber, in particular to an oxime-removal type room-temperature curing silicone rubber without production of diacetylmonoxime anda preparation method thereof. The oxime-removal type room-temperature curing silicone rubber is prepared by mixing the following components in parts by weight according to a formula: 40 to 60 parts of hydroxy-terminated polysiloxane, 3 to 6 parts of crosslinking agent, 1 to 5 parts of silane coupling agent, 5 to 15 parts of plasticizer, 0.1 to 1 part of catalyst, 10 to 30 parts of filler, and 1 to 10 parts of pigment, wherein the crosslinking agent is acetoxime-based silane; the hydroxy-terminated polysiloxane, the plasticizer, the filler and the pigment are stirred under the vacuum condition, and are sequentially added with the acetoxime-based silane, the silane coupling agent and the catalyst, so as to obtain the room-temperature curing silicone rubber. The oxime-removal type room-temperature curing silicone rubber has the advantages that the produced acetoxime in the vulcanizing process basically has no odor, so that the poison and pollution are avoided, and the related regulationsof European Union on control of harmful matters are met; the adhering property is strong, the comprehensive property is excellent, the preparation method is simple, and the operation is easy.
Description
technical field [0001] The invention relates to the technical field of silicone rubber production, in particular to a deoxime-type room temperature curing silicone rubber without butanone oxime and a preparation method thereof. Background technique [0002] Room temperature curing silicone rubber, also known as room temperature vulcanizing silicone rubber, is based on hydroxyl-terminated polysiloxane, and is mixed with fillers, crosslinking agents, coupling agents, plasticizers, catalysts, pigments, etc. under dry conditions. The rubber material is then packaged, sealed, and stored. When in use, a crosslinking reaction can occur through contact with moisture at room temperature to form an elastomer. Room temperature curing silicone rubber can be divided into acetic acid type, ketoxime type, alcohol type, amine type, amide type and acetone type according to the by-products released during vulcanization. Among them, the ketoxime type room temperature curing silicone rubber is...
Claims
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Application Information
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