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Polyester protective film for cellphones and preparation method thereof

A protective film and polyurethane technology, applied in the field of polyurethane protective film for mobile phones and its preparation, can solve the problems of brittleness, poor light transmittance, easy aging, etc., and achieve the effects of strong chemical stability and low cost

Inactive Publication Date: 2019-04-05
耿佃勇
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, most of the mobile phone protective films on the market are made of PP, PVC, tempered film, etc. PP has good stress crack resistance and high bending fatigue life, but it has post-shrinkage phenomenon, easy to aging, Brittle, easy to deform, poor light transmission
The PVC film is relatively soft and easy to paste, but it is relatively thick and the light transmission performance is not very good
The tempered film is made of PET, which has good light transmission, but it is easy to leave fingerprints and is fragile when used.

Method used

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  • Polyester protective film for cellphones and preparation method thereof
  • Polyester protective film for cellphones and preparation method thereof
  • Polyester protective film for cellphones and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The polyurethane protective film for mobile phones is made of the following raw materials in parts by mass:

[0034]

[0035]

[0036] Among them: Zibo Dexin Federal Chemical Industry Co., Ltd. is the manufacturer of polyether polyol DDL-1000D and polyether polyol DDL-700.

[0037] The preparation method is as follows:

[0038] (1) Mix the measured polyether polyol DDL-1000D and polyether polyol DDL-700 evenly and vacuum dehydrate at 100°C for 1.5 hours;

[0039] (2) Add metered HMDI after cooling to 50° C., and heat up to 75° C. to synthesize a prepolymer with an NCO content of 4 wt %;

[0040] (3) After cooling down to 55°C, add 1,4-butanediol to the prepolymer obtained in step (2) and mix evenly, then pour it into the mold and vulcanize for 30 minutes before demoulding;

[0041] (4) Then, vulcanize at 80° C. for 10 hours to obtain a polyurethane protective film for mobile phones with a thickness of 0.15 mm.

Embodiment 2

[0043] The polyurethane protective film for mobile phones is made of the following raw materials in parts by mass:

[0044]

[0045] Among them: Zibo Dexin Federal Chemical Industry Co., Ltd. is the manufacturer of polyether polyol DDL-1000D and polyether polyol DDL-700.

[0046] The preparation method is as follows:

[0047] (1) Mix the measured polyether polyol DDL-1000D and polyether polyol DDL-700 evenly and vacuum dehydrate at 110°C for 2.0 hours;

[0048] (2) Add metered HMDI after cooling to 50° C., and heat up to 80° C. to synthesize a prepolymer with an NCO content of 5 wt %;

[0049] (3) After cooling down to 55°C, add 1,4-butanediol and ethylene glycol to the prepolymer obtained in step (2) and mix evenly, then pour it into the mold and vulcanize for 30 minutes before demoulding;

[0050] (4) Then, vulcanize at 80° C. for 11 hours to obtain a polyurethane protective film for mobile phones with a thickness of 0.15 mm.

Embodiment 3

[0052] The polyurethane protective film for mobile phones is made of the following raw materials in parts by mass:

[0053]

[0054]

[0055] Among them: Zibo Dexin Federal Chemical Industry Co., Ltd. is the manufacturer of polyether polyol DDL-1000D and polyether polyol DDL-700.

[0056] The preparation method is as follows:

[0057] (1) Mix the measured polyether polyol DDL-1000D and polyether polyol DDL-700 evenly and vacuum dehydrate at 120°C for 1.5 hours;

[0058] (2) Add metered HMDI after cooling down to 45°C, and heat up to 70°C to synthesize a prepolymer with an NCO content of 3.5wt%;

[0059] (3) After cooling down to 55°C, add 1,3-propanediol to the prepolymer obtained in step (2) and mix evenly, then pour it into the mold and vulcanize for 30 minutes before demoulding;

[0060] (4) Then, vulcanize at 90° C. for 12 hours to obtain a polyurethane protective film for mobile phones with a thickness of 0.15 mm.

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Abstract

The invention belongs to the technical field of synthesis of organic polymers and particularly relates to polyester protective film for cellphones and a preparation method thereof. The polyester protective film for cellphones is made from, by mass, 60-90 parts of polyether polyol A, 10-40 parts of polyether polyol B, 20-50 parts of HMDI (hexamethylene diisocyanate), and 2-7 parts of a curing agent; the polyether polyol has two degrees of functionality and molecular weight of 800-1500; the polyether polyol B has two degrees of functionality and molecular weight of 500-800. The polyester protective film for cellphones has good shatter-proof performance, wear resistance, dustproof performance, water resistance, anti-fingerprint performance, light transmittance, and toughness. The preparationmethod is simple to perform, scientific and reasonable, low in cost, and free of pollution.

Description

technical field [0001] The invention belongs to the technical field of organic polymer synthesis, and in particular relates to a polyurethane protective film for mobile phones and a preparation method thereof. Background technique [0002] With the development of the economy, people are becoming more and more inseparable from mobile phones. Mobile phones have become a part of people's lives, but the screens of mobile phones are not scratch-resistant, which affects the service life of mobile phones. Therefore, mobile phone protective films have become a necessity. , the mobile phone protective film is a kind of cold lamination film that can be used to mount the surface of the mobile phone body, screen and other tangible objects. There are many types. The function of the protective film is to protect. Stain-resistant effect. [0003] At present, most of the mobile phone protective films on the market are made of PP, PVC, tempered film, etc. PP has good stress crack resistance...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08G18/32C08G18/42C08G18/48C08G18/66C08G18/75
CPCC08G18/3206C08G18/4018C08G18/42C08G18/48C08G18/6607C08G18/758C08J5/18C08J2375/06C08J2375/08
Inventor 荆晓东
Owner 耿佃勇
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