Non-corrosive ketoxime-type room-temperature-cured silicone rubber and preparation method
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A room temperature curing, non-corrosive technology, applied in the field of ketoxime room temperature curing silicone rubber and its preparation, to achieve the effects of easy operation, good comprehensive performance and simple preparation method
Active Publication Date: 2018-04-20
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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[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-cured silicone rubber, specifically to non-corrosive ketoxime-type room-temperature-cured silicone rubber and a preparation method. Theketoxime-type room-temperature-cured silicone rubber is made by mixing, by weight, 40-60 parts of hydroxyl-terminated polysiloxane, 3-6 parts of methyl isobutylketoxime silane, 1-5 parts of a silicane coupling agent, 5-15 parts of a plasticizer, 0.1-1 part of a catalyst, 10-30 parts of a filling material, and 1-10 parts of pigment. The preparation method comprises mixing hydroxyl-terminated polysiloxane, the plasticizer, the filling material and pigment, performing vacuum stirring, adding methyl isobutylketoxime silane, the silicane coupling agent and the catalyst, and performing vacuum stirring to obtain a material of the room-temperature-cured silicone rubber. Methylisobutylketone produced in a vulcanization process of ketoxime-type room-temperature-cured silicone rubber is non-corrosive to a polyurethane material. The requirement to the ketoxime-type room-temperature-cured silicone rubber is met in automobile and electronic industries. The tensile strength of rubber is high, the bonding property of the rubber material is great, 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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Application Information
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