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Highly flexible ultraviolet curing coating for surface protection of silicon rubber products

A curing coating and high elasticity technology, applied in the field of coatings, can solve the problems of insufficient efficiency, energy saving, cleaning and environmental protection of coatings, poor mechanical properties of silicone rubber, and difficulty in obtaining good adhesion, etc., to achieve fast curing, improved chemical resistance, and high efficiency. Effect

Active Publication Date: 2009-12-30
GUANGDONG ZHICHENG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Silicone rubber has the advantages of good elasticity, good weather resistance, and is not easy to age. It is a good material for making buttons of mobile phones and electrical products. Fonts, patterns, etc. can be obtained through printing and coating to make it a functional product, but the mechanical properties of silicone rubber are relatively low. Poor, the font and pattern on the surface of the button are easy to wear, so it is necessary to coat a layer of wear-resistant paint for protection
At present, traditional thermosetting coatings are generally coated on the surface of silicone rubber. Traditional thermosetting coatings generally need to be baked at a temperature of 150°C to 180°C for 1 hour, which takes a long time to cure, and the coating is not efficient, energy-saving, clean and environmentally friendly.
In addition, since silicone rubber is a very inert material, it is difficult to obtain good adhesion on the surface of traditional heat-curing coatings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A kind of silicone rubber product surface protection high elastic ultraviolet light curing coating, its preparation steps are as follows:

[0026] step one:

[0027] Polyester polyol and hexamethylene diisocyanate were mixed at an equivalent ratio of 2:1, and reacted for 4 hours under nitrogen protection at a temperature of 40° C. to obtain silicone-modified polyurethane polyol. In the preparation process of organosilicon-modified polyurethane polyol, an organic salt catalyst of zinc can be added.

[0028] Step two:

[0029] Mix hydroxyethyl acrylate and hexamethylene diisocyanate at an equivalent ratio of 1:2, and react for 4 hours under nitrogen protection at a temperature of 60°C to prepare an acrylic isocyanate prepolymer.

[0030] Step three:

[0031] Mix the silicone-modified polyurethane polyol prepared in the above two steps with the acrylic isocyanate prepolymer in an equivalent ratio of 1:1, and react for 4 hours under the protection of nitrogen at a temper...

Embodiment 2

[0035] A kind of silicone rubber product surface protection high elastic ultraviolet light curing coating, its preparation steps are as follows:

[0036] step one:

[0037] Propylene glycol and diphenylmethylene diisocyanate were mixed in an equivalent ratio of 2:1, and reacted for 4.5 hours under the protection of nitrogen at a temperature of 60° C. to obtain a silicone-modified polyurethane polyol. In the preparation process of organosilicon-modified polyurethane polyol, bismuth organic salt catalyst can be added.

[0038] Step two:

[0039] Hydroxypropyl acrylate and toluene diisocyanate were mixed at an equivalent ratio of 1:2, and reacted for 4.5 hours under the protection of nitrogen at a temperature of 80° C. to prepare an acrylic isocyanate prepolymer.

[0040] Step three:

[0041] Mix the silicone-modified polyurethane polyol prepared in the above two steps with the acrylic isocyanate prepolymer in an equivalent ratio of 1:1, and react for 5 hours under nitrogen pr...

Embodiment 3

[0045] A kind of silicone rubber product surface protection high elastic ultraviolet light curing coating, its preparation steps are as follows:

[0046] step one:

[0047] Triethylene glycol and diphenylmethylene diisocyanate were mixed in an equivalent ratio of 2:1, and reacted for 5 hours under the protection of nitrogen at a temperature of 80° C. to obtain a silicone-modified polyurethane polyol. In the preparation process of organosilicon-modified polyurethane polyol, barium organic salt catalyst can be added.

[0048] Step two:

[0049] Hydroxypropyl acrylate and toluene diisocyanate were mixed at an equivalent ratio of 1:2, and reacted for 5 hours under nitrogen protection at a temperature of 90° C. to prepare an acrylic isocyanate prepolymer.

[0050] Step three:

[0051] Mix the silicone-modified polyurethane polyol prepared in the above two steps with the acrylic isocyanate prepolymer in an equivalent ratio of 1:1, and react for 5.5 hours under nitrogen protection...

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PUM

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Abstract

The invention belongs to the coating technical field and particularly relates to a highly flexible ultraviolet curing coating for the surface protection of silicon rubber products; the coating is prepared by mixing the following components by weight percent: 40%-60% of high-molecular-weight linear silicone modified polyurethane acrylic resin, 20%-40% of activated monomers, 1%-5% of initiator, 2% of flatting agent, 1% of defoaming agent and 0-1% of assistant; the highly flexible ultraviolet curing coating of the invention has fast curing, high efficiency, low energy consumption, clean and environmental ability and good adhesion; the silicon rubber treated through flame treatment can be coated with the coating so that the surface wear resistance, the stain resistance and chemical resistanceof the silicon rubber can be improved.

Description

Technical field: [0001] The invention belongs to the technical field of coatings, and in particular relates to a high-elastic ultraviolet light curing coating for surface protection of silicone rubber products. Background technique: [0002] Silicone rubber has the advantages of good elasticity, good weather resistance, and is not easy to age. It is a good material for making buttons of mobile phones and electrical products. Fonts, patterns, etc. can be obtained through printing and coating to make it a functional product, but the mechanical properties of silicone rubber are relatively low. Poor, the fonts and patterns on the surface of the keys are easy to wear, so it is necessary to coat a layer of wear-resistant paint for protection. At present, traditional thermosetting coatings are generally coated on the surface of silicone rubber. Traditional thermosetting coatings generally need to be baked at a temperature of 150°C to 180°C for 1 hour, which takes a long time to cur...

Claims

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Application Information

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IPC IPC(8): C09D175/14
Inventor 李志民
Owner GUANGDONG ZHICHENG CHEM
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