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Reactive polyurethane hot-melt adhesive for mobile phone round hole shading and preparation method thereof

A polyurethane hot-melt adhesive and reactive technology, applied in the direction of polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve problems such as large spaces, located on both sides or directly above the mobile phone screen, and achieve a good initial stage Effect of strength, good aging resistance

Active Publication Date: 2022-07-29
WUXI WANLI ADHESION MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The front cameras and earpieces of conventional and narrow-frame mobile phones are usually located on both sides or directly above the mobile phone screen, occupying a large space

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] Embodiment 1 of the present invention specifically provides a reactive polyurethane hot-melt adhesive for mobile phone round hole light-shielding. The raw materials of the polyurethane hot-melt adhesive include, in parts by weight, 52 parts of polyol, 17 parts of tackifying resin, Oxygen agent 0.7 parts, sunscreen agent 10 parts, aromatic isocyanate 18.5 parts, catalyst 0.05 parts, silane coupling agent 1.55 parts.

[0072] The polyol is a mixture of polyester polyol and polyether polyol, and the weight ratio of the polyester polyol and polyether polyol is 1.36:1; the polyester polyol is a crystalline polyester polyol; the The average molecular weight of the crystalline polyester polyol is 3000; the average molecular weight of the polyether polyol is 1000; the crystalline polyester polyol is Evonik Dynacoll 7360; the polyether polyol is DOW VORANOL 2000LM.

[0073] The tackifying resin is 2978 from Japan's Mitsubishi.

[0074] The antioxidant is antioxidant 1010.

[0...

Embodiment 2

[0082] Embodiment 2 of the present invention specifically provides a reactive polyurethane hot-melt adhesive for mobile phone round hole light-shielding. The raw materials of the polyurethane hot-melt adhesive include, in parts by weight, 49 parts of polyol, 18 parts of tackifying resin, Oxygen agent 0.8 parts, sunscreen agent 10 parts, aromatic isocyanate 18.9 parts, catalyst 0.05 parts, silane coupling agent 1.45 parts.

[0083] The polyol is a mixture of polyester polyol and polyether polyol, and the weight ratio of the polyester polyol and polyether polyol is 1.57:1; the polyester polyol is a crystalline polyester polyol; the The average molecular weight of the crystalline polyester polyol is 6000; the average molecular weight of the polyether polyol is 2500; the crystalline polyester polyol is Evonik Dynacoll 7360; the polyether polyol is DOW VORANOL 2000LM.

[0084] The tackifying resin is 2978 from Japan's Mitsubishi.

[0085] The antioxidant is antioxidant 1010.

[0...

Embodiment 3

[0093] Embodiment 3 of the present invention specifically provides a reactive polyurethane hot-melt adhesive for shading of mobile phone round holes. The raw materials of the polyurethane hot-melt adhesive include, in parts by weight, 55 parts of polyol, 19 parts of tackifying resin, Oxygen agent 0.8 parts, sunscreen agent 10 parts, aromatic isocyanate 18 parts, catalyst 0.05 parts, silane coupling agent 1.4 parts.

[0094] The polyol is a mixture of polyester polyol and polyether polyol, and the weight ratio of the polyester polyol and polyether polyol is 1.5:1; the polyester polyol is a crystalline polyester polyol; the The average molecular weight of the crystalline polyester polyol is 4000; the average molecular weight of the polyether polyol is 2000; the crystalline polyester polyol is Evonik Dynacoll7360; the polyether polyol is DOW VORANOL 2000LM.

[0095] The tackifying resin is 2978 from Japan's Mitsubishi.

[0096] The antioxidant is antioxidant 1010.

[0097] The ...

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Abstract

The invention relates to the technical field of reactive polyurethane hot-melt adhesives, in particular to reactive-type polyurethane hot-melt adhesives for shading mobile phone round holes and a preparation method thereof. The raw materials of the polyurethane hot melt adhesive include, in parts by weight, 30-65 parts of polyol, 10-40 parts of tackifying resin, 0.1-1 part of antioxidant, 5-15 parts of sunscreen, and 10-15 parts of aromatic isocyanate. 35 parts, 0.01-0.1 parts of catalyst, 1-2 parts of silane coupling agent. The hot melt adhesive provided by the invention has good light-shielding property and aging resistance.

Description

technical field [0001] The invention relates to the technical field of reactive polyurethane hot-melt adhesives, in particular to reactive-type polyurethane hot-melt adhesives for shading mobile phone round holes and a preparation method thereof. Background technique [0002] Nowadays, full-screen mobile phones have become mainstream, and major mobile phone manufacturers are trying their best to expand the screen ratio of the screen and improve the new full-screen design. hole screen" etc. The front camera and handset of conventional bezel and narrow bezel mobile phones are usually located on both sides or directly above the screen of the mobile phone, occupying a large space. In order to expand the screen ratio, it is necessary to reduce the space occupied by the camera and the earpiece, and less glue is needed to bond the camera and block the light. Such a thin layer of glue requires a certain degree of adhesion, light shading and aging resistance. SUMMARY OF THE INVENT...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J175/04C09J11/04C09J11/06C09J11/08
CPCC09J175/04C09J11/04C09J11/06C09J11/08C08K2201/011C08L2203/20C08L33/066C08K13/02C08K3/04C08K5/1345C08K5/5435C08K5/5425C08K5/053
Inventor 徐彬彬
Owner WUXI WANLI ADHESION MATERIALS
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