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Preparation method for silicone adhesive

A technology of silicone rubber and nano-silicon carbide, which is applied in the field of silicone rubber, can solve the problems of poor tensile strength and shear strength, general performance of silicone rubber, etc., to achieve increased shear force, reduced appearance failure rate, The effect of accelerated curing time

Inactive Publication Date: 2018-02-23
安徽东耀建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the performance of the existing silicone rubber is relatively general, especially the tensile strength and shear strength are poor, which cannot meet the needs of the market.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A method for preparing silicone rubber, which is made of the following ingredients in parts by weight: dihydroxypolydimethylsiloxane 75, gelatinized starch 5, crosslinking agent 1.2, filler 10, polytetrahydrofuran ether glycol 2, ring Oxypropylene butyl ether 1, nano silicon carbide 3, plasticizer 2, polyoxypropylene glycol modified methacrylate 3, coupling agent 0.1.

[0016] Further, the preparation method of gelatinized starch is as follows: add water 5 times its mass to cornstarch, stir evenly, heat to 120°C, keep warm for 15min, then cool to 80°C, add 0.15% of its mass to cornstarch % maleic anhydride, stir well, keep warm for 2 hours, then dry to constant weight, pulverize, grind, and pass through 800 mesh sieve to obtain.

[0017] Further, the crosslinking agent is dibutyltin dilaurate.

[0018] Further, the filler is calcium carbonate, and the particle size of the calcium carbonate is 1250 mesh.

[0019] Further, the particle size of the nano-silicon carbide i...

Embodiment 2

[0024] A method for preparing silicone rubber, which is made of the following ingredients in parts by weight: 80 dihydroxy polydimethylsiloxane, 8 gelatinized starch, 1.5 crosslinking agents, 20 fillers, 5 polytetrahydrofuran ether glycols, and cyclic Oxypropylene butyl ether 4, nano silicon carbide 6, plasticizer 4, polyoxypropylene glycol modified methacrylate 8, coupling agent 0.3.

[0025] Further, the preparation method of gelatinized starch is as follows: add water 5 times its mass to cornstarch, stir evenly, heat to 120°C, keep warm for 15min, then cool to 80°C, add 0.15% of its mass to cornstarch % maleic anhydride, stir well, keep warm for 2 hours, then dry to constant weight, pulverize, grind, and pass through 800 mesh sieve to obtain.

[0026] Further, the crosslinking agent is dibutyltin dilaurate.

[0027] Further, the filler is calcium carbonate, and the particle size of the calcium carbonate is 1250 mesh.

[0028] Further, the particle size of the nano-silicon...

Embodiment 3

[0033] A method for preparing silicone rubber, which is made of the following ingredients in parts by weight: dihydroxy polydimethylsiloxane 78, gelatinized starch 6, crosslinking agent 1.3, filler 15, polytetrahydrofuran ether glycol 3, cyclo Oxypropylene butyl ether 2, nano silicon carbide 5, plasticizer 3, polyoxypropylene glycol modified methacrylate 6, coupling agent 0.2.

[0034] Further, the preparation method of gelatinized starch is as follows: add water 5 times its mass to cornstarch, stir evenly, heat to 120°C, keep warm for 15min, then cool to 80°C, add 0.15% of its mass to cornstarch % maleic anhydride, stir well, keep warm for 2 hours, then dry to constant weight, pulverize, grind, and pass through 800 mesh sieve to obtain.

[0035] Further, the crosslinking agent is dibutyltin dilaurate.

[0036] Further, the filler is calcium carbonate, and the particle size of the calcium carbonate is 1250 mesh.

[0037] Further, the particle size of the nano-silicon carbide...

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Abstract

The invention discloses a preparation method for a silicone adhesive, and relates to the technical field of silicone adhesives. The silicone adhesive is prepared from the following components: diyhydroxyl polydimethylsiloxane, gelatinized starch, a cross-linking agent, a filling material, polytetrahydrofuran glycol, epoxypropane butyl ether, nanometer silicon carbide, a plasticizer, polyoxypropylene glycol modified methacrylate and a coupling agent. The silicone adhesive prepared by using the preparation method provided by the invention has excellent performances in various aspects. Accordingto the invention, the polyoxypropylene glycol modified methylacrylate has actions of plasticizing, reducting the modulus of a colloid and increasing anti-displacement ability; through the interactionof the polyoxypropylene glycol modified methacrylate and the epoxypropane butyl ether, the viscosity of a base adhesive can be improved; and after addition of the nanometer silicon carbide, the resistance during stirring in production is increased, and the shear force is improved, so the nanometer silicone carbide is dispersed more uniformly, and the tensile strength and the shear strength of thesilicone adhesive are effectively improved.

Description

technical field [0001] The invention belongs to the technical field of silicone glue, and in particular relates to a preparation method of silicone glue. Background technique [0002] In modern building materials, environmentally friendly materials are used more and more widely, and the country has always encouraged the development of environmentally friendly materials to achieve sustainable development. As a sealing material, silicone glue is widely used in doors and windows, curtain wall structural engineering and various building joints. Silicone glue, part of the silicone product, is an ointment-like material that solidifies into a tough, rubber-like solid upon exposure to moisture in the air. Mainly divided into deacetate type, dealcohol type, deamination type, depropanization type. Glass glue is a common name for silicone glue, because users buy silicone sealant mainly for bonding and sealing of glass, so it is called glass glue. However, the performance of existing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J183/04C09J103/02C09J171/02C09J191/00C09J11/04C09J11/06C09J11/08
CPCC09J183/04C08K2003/265C08K2201/011C08L2205/025C08L2205/035C09J11/04C09J11/06C09J11/08C08L3/02C08L71/02C08L91/00C08K13/02C08K5/1515C08K3/34C08K3/26
Inventor 李爱珍
Owner 安徽东耀建材有限公司