A kind of non-corrosive ketoxime type room temperature curing silicone rubber and its preparation method
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A room temperature curing, non-corrosive technology, which is applied in the field of ketoxime type room temperature curing silicone rubber and its preparation, achieves the effects of simple preparation method, good comprehensive performance and easy operation.
Active Publication Date: 2021-05-11
ZHEJIANG QUZHOU GUIBAO CHEM
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[0004] Aiming at the problem that the existing ketoxime type room temperature curing silicone rubber is vulcanized, butanone oxime by-products corrode polyurethane and affect the application, the purpose of the present invention is to provide a non-corrosive ketoxime type room temperature curing silicone rubber, which can avoid Butanone oxime is used as a by-product, and the vulcanization by-product produced is non-corrosive and will not cause cracking of polyurethane materials, which meets the application of ketoxime-type room temperature curing silicone in the fields of automobiles and electronics, and avoids the production of butanone during vulcanization of silicone rubber. The carcinogenic risk brought by oxime, and the comprehensive performance of the ketoxime room temperature curing silicone rubber is good
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preparation example Construction
[0024] The preparation method of above-mentioned ketoxime type room temperature curing silicone rubber 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 30-60 minutes;
[0026] (2) Weigh methyl isobutyl ketoxime base silane and add, continue vacuum stirring for 30-60 minutes;
[0027] (3) Weighing the silane coupling agent and adding the catalyst, stirring in vacuum for 30-60 minutes, and packing under nitrogen protection to obtain a room temperature curing silicone rubber compound.
Embodiment 1
[0029] Non-corrosive ketoxime type room temperature curing silicone rubber, its formula consists of 40g of hydroxyl-terminated polysiloxane, 3g of methyl isobutyl ketoxime silane, 1g of silane coupling agent, 5g of plasticizer, 0.1g of catalyst, filler 10g and 1g of pigment are mixed to obtain, wherein methyl isobutyl ketoxime base silane is methyl tris(methyl isobutyl ketoxime base) silane, silane coupling agent is aminosilane coupling agent, plasticizer is silicone oil, and catalyst is Organic tin catalyst, the filler is a mixture of calcium carbonate and white carbon black. 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 tri(methyl isobutyl ketoxime base) silane and add, continue vacuum stirring for 30 minutes;
[0032] (3) Weigh the silane coupling agent and add the catalyst, stir in vacuum for 30 minu...
Embodiment 2
[0034] The non-corrosive ketoxime type room temperature curing silicone rubber is different from Example 1 in that the selected methyl isobutyl ketoxime silane is vinyl tris(methyl isobutyl ketoxime) silane.
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Abstract
The invention relates to the technical field of room temperature curing silicone rubber, in particular to a non-corrosive ketoxime type room temperature curing silicone rubber and a preparation method. The formula of ketoxime type room temperature curing silicone rubber consists of 40-60 parts by weight of hydroxyl-terminated polysiloxane, 3-6 parts of methyl isobutyl ketoximosilane, 1-5 parts of silane coupling agent, plasticizer 5 to 15 parts, 0.1 to 1 part of catalyst, 10 to 30 parts of filler, and 1 to 10 parts of pigment are obtained by mixing hydroxyl-terminated polysiloxane, plasticizer, filler and pigment, and then adding methyliso butanone oximino silane, a silane coupling agent, a catalyst, and vacuum stirring to obtain a room-temperature-cured silicone rubber compound. The methyl isobutyl ketone oxime produced during the vulcanization process of the ketoxime type room temperature curing silicone rubber is non-corrosive to polyurethane materials, and meets the needs of the automobile and electronics industries for ketoxime type room temperature curing silicone rubber. The colloid has high tensile strength, In addition, the bonding performance of the rubber material is strong, and the preparation method is simple.
Description
technical field [0001] The invention relates to the technical field of room temperature curing silicone rubber, in particular to a non-corrosive ketoxime type room temperature curing silicone rubber and a preparation method. 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 has g...
Claims
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