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A kind of silicone prepolymer modified by polyurethane acrylate and preparation method thereof

A technology of polyurethane acrylate and silicone, applied in the field of silicone, to achieve the effects of improving curing efficiency, easy availability of raw materials, and improving miscibility

Active Publication Date: 2020-12-08
深圳市中源鸿福科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the shortcomings of the existing silicone materials and polyurethane acrylate prepolymers when used alone, the invention provides a polyurethane acrylate modified silicone prepolymer and a preparation method thereof

Method used

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  • A kind of silicone prepolymer modified by polyurethane acrylate and preparation method thereof
  • A kind of silicone prepolymer modified by polyurethane acrylate and preparation method thereof
  • A kind of silicone prepolymer modified by polyurethane acrylate and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The preparation of embodiment 1 intermediate P1-1

[0035] Add 66.5g of isophorone diisocyanate and 0.1g of dibutyltin dilaurate into a four-necked round-bottomed flask equipped with a thermometer, a stirrer, a constant pressure dropping funnel and a nitrogen tube, and add 34.8g of it dropwise at 40°C. For the mixed solution of hydroxyethyl acrylate and 0.08g p-hydroxyanisole, measure the NCO value every 20 minutes, and reach the theoretical calculation value of 12.4wt%, that is, the intermediate P1-1 with a terminal NCO and terminal acrylate double bond is obtained , sealed for later use.

Embodiment 2

[0036] The preparation of embodiment 2 intermediate P1-2

[0037] Add 52.1g of toluene diisocyanate, 52.1g of toluene and 0.1g of dibutyltin dilaurate to a four-neck round bottom flask equipped with a thermometer, stirrer, constant pressure dropping funnel and nitrogen tube, and add 39.0 g of dibutyltin dilaurate dropwise at 40°C. The mixed solution of g hydroxypropyl acrylate and 0.08g p-hydroxyanisole, measure the NCO value once every 20 minutes, reach the theoretical calculation value 8.8wt%, promptly obtain the intermediate P1- 2. Sealed for later use.

Embodiment 3

[0038] The preparation of embodiment 3 intermediate P1-3

[0039] Add 66.5g of isophorone diisocyanate and 0.1g of dibutyltin dilaurate to a four-neck round bottom flask equipped with a thermometer, stirrer, constant pressure dropping funnel and nitrogen tube, and add 43.2g of it dropwise at 40°C The mixed solution of hydroxybutyl acrylate and 0.08g p-hydroxyanisole, the NCO value is measured once every 20 minutes, reaches the theoretical calculation value of 11.4wt%, promptly obtains the intermediate P1-3 with a terminal NCO and terminal acrylate double bond , sealed for later use.

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Abstract

The invention relates to a polyurethane acrylate modified organosilicone prepolymer and a preparation method of the organosilicone prepolymer. The organosilicone prepolymer has a structural formula shown in a formula I, and the formula I is described in the description. According to the modified organosilicone prepolymer designed by the invention, Polyurethane and acrylate groups are introduced into a molecular chain, so that the miscibility in the formula is improved; the acrylate group in the molecular chain of the prepolymer can be subjected to an efficient polymerization reaction when being irradiated under ultraviolet light, so that the curing efficiency is increased; the alkoxy silane group in the molecular chain avoids the defect of poor adhesion caused by excessive bubbles generated in a moisture curing reaction; therefore, the modified organosilicone prepolymer provided by the invention has a ultraviolet light curing function and a moisture curing function at the same time.

Description

technical field [0001] The invention relates to a silicone prepolymer and a preparation method thereof, in particular to a polyurethane acrylate-modified silicone prepolymer and a preparation method thereof, belonging to the technical field of silicone. Background technique [0002] Due to its unique macromolecular structure, silicone materials have excellent high and low temperature resistance, electrical insulation, weather resistance and chemical stability, etc. These properties make silicone materials widely used in various military, industrial and civilian fields middle. [0003] Most of the adhesives, coatings or filling materials prepared from silicone raw materials have the above-mentioned excellent properties through moisture curing, but moisture curing takes a long time, although the curing time can be shortened by heating, but for some heat Sensitive precision parts are not suitable. In addition, the molecules of silicone raw materials have relatively low polari...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/61C08G18/67
CPCC08G18/61C08G18/672
Inventor 张盈曲荣君崔亨利
Owner 深圳市中源鸿福科技有限公司