Environment-friendly organosilicone pressure-sensitive adhesive and preparation method thereof

A silicone pressure-sensitive adhesive and silicone rubber technology, which is applied in adhesives and other directions, can solve the problems of poor solubility of silicone pressure-sensitive adhesives, surface defects of pressure-sensitive tapes, and poor transparency, and achieve excellent transparency, smooth surface, and avoid Effects of Environmental Pollution

Inactive Publication Date: 2017-02-15
湖北新四海化工股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above silicone pressure-sensitive adhesives use solvents with low molecular weight or lower boiling point, which have poor solubility for silicone pressure-sensitive adhesives. When the adhesive tape is glued and then cured, the solvent volatilizes and there is no volatility gradient. Pressure-sensitive tapes are prone to surface blemishes, poor transparency, and easy adhesive residue

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The environment-friendly silicone pressure-sensitive adhesive of the present embodiment has a raw material formula as follows:

[0025] Vinyl MQ resin 0.5kg, wherein, vinyl mass percentage is 5%, MQ ratio is 0.95

[0026] Hydroxyl-terminated polydimethylsiloxane with a molecular weight of 400,000 1kg

[0027] PMA0.5kg

[0028] Butyl acetate 0.5kg

[0029] Dibutyltin dilaurate 0.01kg

[0030] γ-Aminopropyltriethoxysilane 0.001kg.

[0031] The preparation process is as follows:

[0032] S1, put the vinyl MQ resin and hydroxyl-terminated polydimethylsiloxane into the reaction kettle, add PMA and butyl acetate to fully dissolve the vinyl-based MQ resin and hydroxyl-terminated polydimethylsiloxane, and set the temperature at 40°C Keep warm for 0.5 hours;

[0033] S2, add dibutyltin dilaurate, stir evenly, heat up to 90°C, and react under reduced pressure and reflux for 2 hours;

[0034] S3, the temperature is lowered to 60° C., γ-aminopropyltriethoxysilane is added, a...

Embodiment 2

[0036] Vinyl MQ resin 1.5kg, wherein, vinyl mass percentage is 2.5%, MQ ratio is 0.75

[0037] Hydroxy-terminated polydimethylsiloxane with a molecular weight of 600,000 1kg

[0038] DBE 0.6kg

[0039] Butyl acetate 1.4kg

[0040] Dibutyltin acetate 0.1kg

[0041] 3-Glycidyl etheroxypropylmethyldimethoxysilane 0.01kg.

[0042] The preparation process is as follows:

[0043] S1, Put vinyl MQ resin and hydroxyl-terminated polydimethylsiloxane into the reaction kettle, add DBE and butyl acetate to fully dissolve vinyl-based MQ resin and hydroxyl-terminated polydimethylsiloxane. Keep warm for 1.5 hours;

[0044] S2, add dibutyltin acetate, stir evenly, heat up to 110°C, and react under reduced pressure and reflux for 3 hours;

[0045] S3, the temperature was lowered to 80° C., 3-glycidyl etheroxypropylmethyldimethoxysilane was added, and the reaction was maintained for 1.5 hours to obtain the final product.

Embodiment 3

[0047] Vinyl MQ resin 2.5kg, wherein, vinyl mass percentage is 0.5%, MQ ratio is 0.55

[0048] Hydroxyl-terminated polydimethylsiloxane with a molecular weight of 800,000 1kg

[0049] EGDA0.71kg

[0050] Butyl acetate 1.79kg

[0051] Stannous octoate 0.5kg

[0052] Vinyltrimethoxysilane 0.1kg.

[0053] The preparation process is as follows:

[0054] S1, put vinyl MQ resin and hydroxyl-terminated polydimethylsiloxane into the reaction kettle, add DBE to fully dissolve the vinyl-based MQ resin and hydroxyl-terminated polydimethylsiloxane, and keep warm at 70°C for 2 hours;

[0055] S2, add stannous octoate, stir evenly, heat up to 120°C, and react under reduced pressure and reflux for 5 hours;

[0056] S3, the temperature is lowered to 90° C., vinyltrimethoxysilane is added, and the reaction is maintained for 2 hours to obtain the final product.

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PUM

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Abstract

The invention provides an environment-friendly organosilicone pressure-sensitive adhesive and a preparation method thereof. PMA, DBE, EGDA, n-butyl acetate and other environment-friendly solvent are adopted, are free of toxin to human bodies, and avoid the environment pollution; in addition, through the cooperation of PMA, DBE, EGDA and n-butyl acetate, the combination of high-boiling-point solvent and low-boiling-point solvent is formed, the solubility of the organosilicone pressure-sensitive adhesive is better, the proper volatile gradient of the solvent is formed when the adhesive is applied and cured in the adhesive tape manufacturing process, and the prepared pressure-sensitive adhesive tape is more smooth in surface and more excellent in transparency and prevents adhesive residues.

Description

technical field [0001] The invention relates to the technical field of silicone pressure-sensitive adhesives, in particular to an environment-friendly silicone pressure-sensitive adhesive and a preparation method thereof. Background technique [0002] Silicone pressure-sensitive adhesives have excellent shear strength, peel strength, cohesive strength and adhesiveness. Silicone pressure-sensitive adhesives not only have good adhesive strength, initial tack, and holding The surface material has good adhesion, and it also has good bonding performance for untreated difficult-to-stick materials; in addition, it also has high temperature and low temperature resistance, and can be used for a long time between -70 and 280 ° C; good resistance Chemical properties, while having outstanding solvent resistance and electrical properties. Traditional silicone pressure-sensitive adhesives are cured at 180°C with peroxide as a crosslinking agent. However, addition-type silicone pressure-s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J183/07C09J183/06C09J11/00
CPCC08L2205/02C09J11/00C09J183/04C09J183/06C08L83/04C08L83/06
Inventor 龚家全陈华玲杨开柱
Owner 湖北新四海化工股份有限公司
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