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Catalyst-free acid gel and development method thereof

A catalyst and acid glue technology, applied in adhesives, adhesive additives, non-polymer adhesive additives, etc., can solve the problem that titanium catalysts are prone to yellowing, cannot be used in contact with food, and affect the use effect of silicone rubber sealants, etc. problem, to achieve good curing effect, good curing effect and good sealing effect

Pending Publication Date: 2021-04-09
广东长鹿新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There is an obvious disadvantage in the application of non-toxic, contactable silicone rubber used in medical devices and food, because this type of silicone rubber uses organotin compounds as catalysts, so it cannot be used in the field of food contact. Some researchers have used The reactants of inorganic oxide powders such as white carbon black, quartz powder, titanium dioxide, iron oxide and titanium compounds are used as catalysts to change the method of directly using organotin compounds as catalysts to prepare non-toxic sealants that can directly contact food
However, this type of catalyst needs to go through complicated pretreatment steps, and the titanium catalyst used is prone to problems such as yellowing during the treatment process, which affects the use effect of silicone rubber sealants

Method used

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  • Catalyst-free acid gel and development method thereof
  • Catalyst-free acid gel and development method thereof
  • Catalyst-free acid gel and development method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] A catalyst-free acid gel. The raw materials are prepared in parts by weight, including: 100 parts of α, ω-dihydroxy polydimethylsiloxane, 6 parts of fumed white carbon black, 0.5 parts of di-tert-butoxydiacetoxysilane 1 part, 1 part of methyltriacetoxysilane, 4 parts of vinyltriacetoxysilane.

[0067] α, ω-Dihydroxypolydimethylsiloxane, CAS No. 31692-79-2, purchased from Dow Corning; Fumed silica, purchased from Cabot; Methyltriacetoxysilane, purchased from Purchased from Jingzhou Jianghan Fine Chemical Co., Ltd.; Vinyltriacetoxysilane was purchased from Jingzhou Jianghan Fine Chemical Co., Ltd.

[0068] A method for developing catalyst-free acid gel, comprising the following steps:

[0069] S1: Add α,ω-dihydroxy polydimethylsiloxane to the vacuum planetary mixer, stir for 2 minutes, then add methyltriacetoxysilane and vinyltriacetoxysilane and stir for 20 minutes;

[0070] S2: Add fumed silica and di-tert-butoxydiacetoxysilane to the step S1, and stir for 10 minutes ...

Embodiment 2

[0072] A catalyst-free acid gel. The raw materials are prepared in parts by weight, including: 100 parts of α, ω-dihydroxy polydimethylsiloxane, 6 parts of fumed white carbon black, 0.5 parts of di-tert-butoxydiacetoxysilane Parts, 2 parts of methyltriacetoxysilane, 3 parts of vinyltriacetoxysilane.

[0073] α, ω-Dihydroxypolydimethylsiloxane, CAS No. 31692-79-2, purchased from Dow Corning; Fumed silica, purchased from Cabot; Methyltriacetoxysilane, purchased from Purchased from Jingzhou Jianghan Fine Chemical Co., Ltd.; Vinyltriacetoxysilane was purchased from Jingzhou Jianghan Fine Chemical Co., Ltd.

[0074] A method for developing a catalyst-free acid gel refers to Example 1.

Embodiment 3

[0076] A catalyst-free acid gel. The raw materials are prepared in parts by weight, including: 100 parts of α, ω-dihydroxy polydimethylsiloxane, 6 parts of fumed white carbon black, 0.5 parts of di-tert-butoxydiacetoxysilane Parts, 3 parts of methyltriacetoxysilane, 2 parts of vinyltriacetoxysilane.

[0077] α, ω-Dihydroxypolydimethylsiloxane, CAS No. 31692-79-2, purchased from Dow Corning; Fumed silica, purchased from Cabot; Methyltriacetoxysilane, purchased from Purchased from Jingzhou Jianghan Fine Chemical Co., Ltd.; Vinyltriacetoxysilane was purchased from Jingzhou Jianghan Fine Chemical Co., Ltd.

[0078] A method for developing a catalyst-free acid gel refers to Example 1.

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Abstract

The invention belongs to the technical field of silicone rubber, and particularly relates to catalyst-free acid gel and a development method thereof. The catalyst-free acid gel is prepared from the following raw materials in parts by weight: 80 to 120 parts of polysiloxane, 1 to 10 parts of a filler, 0.1 to 2 parts of an auxiliary agent and 1 to 6 parts of a cross-linking agent. The results of a large number of creative experiments prove that a traditional catalyst is replaced by compounding of vinyltriacetoxysilane and methyltriacetoxysilane, good catalytic activity is achieved, the use of an organic metal catalyst is avoided, safety and environmental protection are achieved, curing effect is better, and the catalyst-free acid gel is suitable for the fields of medical treatment, food and the like and has good cohesiveness.

Description

technical field [0001] The invention belongs to the technical field of silicone rubber, and more specifically relates to a catalyst-free acid rubber and a preparation method thereof. Background technique [0002] With the development of RTV silicone rubber sealant, its application has penetrated more and more in all aspects of life. There is an obvious disadvantage in the application of non-toxic, contactable silicone rubber used in medical devices and food, because this type of silicone rubber uses organotin compounds as catalysts, so it cannot be used in the field of food contact. Some researchers have used The reactants of inorganic oxide powders such as white carbon black, quartz powder, titanium dioxide, iron oxide and titanium compounds are used as catalysts to change the method of directly using organotin compounds as catalysts to prepare non-toxic sealants that can directly contact food. However, this type of catalyst needs to go through complicated pretreatment ste...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J183/04C09J11/06C09J11/04
CPCC09J183/04C09J11/06C09J11/04
Inventor 张剑张震宇曾武何晓军梁真福褚颖宏
Owner 广东长鹿新材料科技有限公司
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