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Sound equipment spray polyurea coating

A technology for audio equipment and coatings, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of mechanical properties, surface hardness and surface drying time difficult to meet actual requirements, coating cracking and wear resistance, etc., to achieve wear resistance. No scratches, good flexibility, improved wear resistance

Active Publication Date: 2016-12-07
KESHUN WATERPROOF TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention aims at the above-mentioned problems existing in the prior art, to provide a polyurea coating for audio equipment spraying, the NCO content is between 17%-19%, the hardness of the paint film after curing is as high as Shore A60-75, and the elongation at break The elongation rate reaches about 100%, the tear strength and tensile strength are high, and it shows very good flexibility. Without adding a catalyst, the curing speed is improved, and the rapid curing surface granulation produces pitting effect, and the wear resistance It is greatly improved and will not be scratched and can meet the protection requirements of polyurea coating and long-term use needs. It solves the problem of cracking and poor wear resistance of the surface coating with high hardness of polyurea coating sprayed on audio equipment in the prior art, mechanical properties, The surface hardness and surface dry time are difficult to meet the assembly line production requirements of the actual audio industry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A polyurea coating for audio equipment spraying, the coating is composed of equal volumes of components A and B, wherein the preparation method of component A is as follows: by mass percentage, 25% of polyoxypropylene polyol D3000, 10% Mix polyaspartic acid ester of brand F524 and 5% viscosity reducer of brand DINP, heat up to 90-110°C for 2-3 hours, cool down to 80-85°C and add 60% of MDI-50 React the isocyanate for 3-5 hours, lower the temperature, filter and package to obtain component A; the preparation method of component B is as follows: in terms of mass percentage, 35% of amino-terminated polyether, 15% of D2925 modified polytetrafluoroethylene Mix aspartic acid ester, 34% amine chain extender and 9% DINP viscosity reducer, heat up to 90-100°C for 1-2 hours, cool down to 60°C, add 1% liquid water remover , 0.5% defoamer and 0.5% dispersant, fully disperse, add 5% color paste, fully disperse evenly, filter and pack to get B component. The amino-terminated polyeth...

Embodiment 2

[0026]Referring to Example 1, the difference is that the polyisocyanate in component A is preferably a mixture of MID-100 and MDI-100LL in this embodiment, wherein the mass percent of MID-100 is 35%, and the mass percent of MDI-100LL It is 30%; Polyaspartic acid ester is preferably F420 in the present embodiment, and its mass percentage is 10%; Polyether polyol is preferably PCDL2000D in the present embodiment, and its mass percentage is 20%; Viscosity reducer is in this embodiment DOTP is preferred in the example, and its mass percentage is 5%; the amino-terminated polyether in component B is preferably polyetheramine D2000 in this embodiment, and its mass percentage is 40%; modified polyaspartic acid ester is used in this embodiment Among them, the mixture of D2970 and D2905 is preferred, the mass percentage of D2970 is 5%, and the mass percentage of D2905 is 5%; the amine chain extender is preferably dimethylthiotoluenediamine and N, N' dialkyl in this embodiment The mixtur...

Embodiment 3

[0029] With reference to Example 1, the difference is:

[0030] Polyisocyanate in component A is preferably a mixture of HDI and XDI in this embodiment, wherein the mass percentage of HDI is 35%, and the mass percentage of XDI is 20%; polyaspartic acid ester is preferably F520 in this embodiment , its mass percentage is 15%; Polyether polyol preferred PTMG2000D in the present embodiment, its mass percentage is 20%; Viscosity reducer preferred low viscosity chlorinated paraffin in the present embodiment, its mass percentage is 10%; B The amino-terminated polyether in the component is preferably polyetheramine D400 in this embodiment, and its mass percentage is 37%; the modified polyaspartic acid ester is preferably D2902 in this embodiment, and its mass percentage is 12%; amines In this embodiment, the chain extender is preferably a mixture of isophorone diamine and ClearlinkTM1000, the mass percentage of isophorone diamine is 30%, and the mass percentage of ClearlinkTM1000 is ...

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PUM

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Abstract

The invention discloses sound equipment spray polyurea coating. The coating is composed of a component A and a component B, the NCO content ranges from 17 wt% to 19 wt%, after paint film is cured, the hardness reaches up to Shore A 60 to Shore A 75, the elongation at break reaches about 100%, the tear strength and tensile strength are high, excellent flexibility is shown, no catalyst is added, the curing speed is increased, rapid curing and surface granulation are conducted, a pitted surface effect is produced, abrasion resistance is greatly improved, the coating cannot be scratched, and the requirements of polyurea coating protection and long-term use can be met; the problems that for sound equipment spray polyurea coating in the prior art, the high hardness surface coating is fractured, the abrasion resistance is poor, and the mechanical property, surface hardness and surface drying time have difficulty in meeting assembly line production requirements in actual audio industry are solved.

Description

Technical field: [0001] The invention relates to coatings, in particular to polyurea coatings sprayed on audio equipment. Background technique: [0002] Audio equipment is usually painted with phenolic paint, alkyd paint, nitro paint, acrylic paint, polyurethane paint, unsaturated polyester paint, etc. The wear resistance of the coating is difficult to meet the actual application. In the actual application process, special parts such as audio seams and corners will be deformed and cracked or even peeled off with the increase in the number of uses and the bumpy handling during outdoor use. In addition, in the disassembly and assembly process of audio equipment such as large-scale concerts and large-scale wedding outdoor activities, frequent friction and external impact can easily damage the paint film on the surface of the audio. This will not only affect the overall aesthetic effect of the speaker, but also shorten the service life. Polyurea has excellent performance and i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/02C08G18/65C08G18/66C08G18/40C08G18/48C08G18/50C08G18/64
CPCC08G18/4081C08G18/48C08G18/5021C08G18/6415C08G18/6529C08G18/6685C08G2150/50C09D175/02
Inventor 陈伟忠林焕章龚兴宇刘勤
Owner KESHUN WATERPROOF TECH CO LTD
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