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Photocured adhesive for key pad silicon rubber component binding and its production method

A silicone rubber and adhesive technology, which is used in the synthesis of acrylate copolymers, light-curable adhesives, and polyurethane acrylates. It can solve the problems of limited application, whitening, etc., and achieve the problem of whitening and good adhesion. The effect of knot strength, fast curing ability

Inactive Publication Date: 2007-07-11
QUANZHOU SICONG NEW MATERIAL DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high vapor pressure of α-cyanoacrylate adhesive, α-cyanoacrylate adhesive forms a white film on the surface of the base layer, which will cause whitening during the use of mobile phones, which limits its application.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Heat 44.4g of isophorone diisocyanate to 65°C, slowly add 100g of polytetrahydrofuran diol (1000) solution with 0.58g of dibutyltin dilaurate dropwise under stirring, and after 3 hours of reaction, the temperature rises to 75°C , added dropwise 28.80 g of hydroxypropyl methacrylate to react for 4 hours.

[0023] Prepare a light-curing adhesive for bonding silicone rubber parts of the keyboard according to the ratio in the table below. Take 40.00g of isobornyl methacrylate, 1.10g of Deqian 1121 adhesion promoter, 3.00g of phosphate methacrylate, and add white carbon Black 30.40g, after dispersing evenly, add 1.70g of 2,6-di-tert-butyl-4-methylphenol, 9.80g of 2,4,6-trimethylbenzoyldiphenylphosphine oxide, dissolve and add the prepared 114.080 g of urethane acrylate was ground by a three-roll mill at room temperature for 1 hour and mixed evenly to obtain a silicone rubber bonding light-curing adhesive.

[0024] components

Embodiment 2

[0026] Polyurethane acrylate was prepared according to Example 1.

[0027] Prepare a light-curing adhesive for bonding silicone rubber parts of the keyboard according to the ratio in the table below. Take 50.40 g of isobornyl methacrylate, 4.00 g of dodecafluoroheptyl methacrylate, and 2.60 g of Deqian 1121 adhesion promoter. Add 2.50g of white carbon black, 1.90g of hydroquinone and 5.00g of dimethoxyphenylacetophenone are added after the dispersion is uniform, and 133.60g of the prepared polyurethane acrylate is added after dissolving, and ground for 1 hour at room temperature by a three-roll mill Mix evenly to obtain a silicone rubber bonding light-curing adhesive.

[0028] components

Embodiment 3

[0030] Polyurethane acrylate was prepared according to Example 1.

[0031] Prepare the light-curing adhesive for the bonding of keyboard silicone rubber parts according to the ratio in the table below. Qian 1121 adhesion promoter 1.00g, add 1.60g of p-hydroxyanisole, 5.60g of diethyl 2,4,6-trimethylbenzoylphosphonate, dissolve and add 107.80g of polyurethane acrylate with a molecular weight of 48,000 , mixed at room temperature with a high-speed shear mixer for 1.5 hours to obtain a silicone rubber bonding light-curing adhesive.

[0032] components

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PUM

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Abstract

The invention discloses an optical solidifying adhesive to bind keyboard silicon rubber piece of handset, PC or ABS, which comprises the following parts: 22. 00 -75. 00% polyurethane acrylate, 20.0-50.0% (methyl) acrylate, 0.00-20.00% white carbon black, 0.50-4. 00% adhesion accelerant, 0.01-1. 00% stabilizer and 0.50-5. 00% optical initiator.

Description

technical field [0001] The present invention relates to an adhesive based on a copolymer having one or more unsaturated aliphatic compounds, in particular to an acrylate copolymer; in addition, it also relates to a photocurable adhesive. Simultaneously, the present invention also relates to the synthesis technology of polyurethane acrylate. Background technique [0002] Silicone rubber is a kind of linear polymer elastomer polymerized by dimethylsiloxane monomer and other organosilicon monomers in the presence of acid or alkaline catalysts. Another characteristic of the chemical structure of silicone rubber is high saturation , has high thermal stability, excellent aging resistance and excellent low-temperature performance, and is an ideal shock-absorbing material. With the wide application in national defense science and technology and industrial construction, the bonding of silicone rubber to plastics and metals has become an increasingly important research field. At pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/14C09J4/00G06F3/02
Inventor 刘彦军赵欣
Owner QUANZHOU SICONG NEW MATERIAL DEV
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