Thermoplastic polyurethane (TPU) thin film used for automobile surface protection, and preparation method of self-repair coating of TPU thin film

A self-repairing technology for the surface of automobiles, which is applied in the direction of surface coating liquid devices, coatings, special surfaces, etc., which can solve the problems of inability to protect the surface of the automobile, no anti-static function, high cost of thermotropic liquid crystal epoxy resin, etc. Problems, to achieve the effect of widely popularizing and applying, maintaining clean and beautiful appearance, and good protection effect

Inactive Publication Date: 2017-11-07
DONGGUAN DINGLI FILM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The material has self-healing function, but has no antistatic function. The cost of thermotropic liquid crystal epoxy resin used is relatively high, and the process plan is not carried out by means of coating process. According to the plan method and formula, it is used for automobile surface coating Layer use, unable to effectively and stably protect the surface of the car

Method used

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  • Thermoplastic polyurethane (TPU) thin film used for automobile surface protection, and preparation method of self-repair coating of TPU thin film

Examples

Experimental program
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Effect test

Embodiment 1

[0042] Example 1: see figure 1 , the embodiment of the present invention provides a TPU film for automobile surface protection, which includes a PE protective layer 1, a self-repairing coating 2, an antifouling layer 3, an elastic TPU layer 4, an adhesive layer 5, a release layer 6 and a PET Layer 7, the PE protective layer 1, self-healing coating 2, antifouling layer 3, elastic TPU layer 4, adhesive layer 5, release layer 6 and PET layer 7 are laminated sequentially from top to bottom.

[0043]Specifically, the self-healing coating includes the following raw materials in parts by weight: 1000 parts of isocyanate substances, 1100 parts of polyols containing conjugated structures, 18 parts of catalysts, 130 parts of chain extenders, 1300 parts of solvents, and 80 parts of dispersants Parts, 60 parts of defoamer.

[0044] Wherein, the isocyanate substance is a mixture of conjugated butadiene isocyanate and modified epoxy isocyanate in a ratio of 1:3; the polyol containing a con...

Embodiment 2

[0053] Embodiment 2: a kind of TPU film and its self-repairing coating preparation method for automobile surface protection provided by the present embodiment, it is basically consistent with implementation 1, and difference is in the following differences:

[0054] The self-healing coating includes the following raw materials in parts by weight: 1100 parts of isocyanate substances, 1200 parts of polyols containing conjugated structures, 16 parts of catalysts, 150 parts of chain extenders, 1100 parts of solvents, 70 parts of dispersants, Foam agent 45 parts.

[0055] Among them, the PE protective layer is preferably a PE medium-adhesive film with a thickness of 18 μm, its peel strength is 20g / cm, and the elongation rate is 420%, which can resist the corrosion of the self-repairing layer by the external environment; preferably, the self-repairing coating is coated The thickness of the cloth film is 6µm, which meets the function of self-repairing of automobiles; the self-repairi...

Embodiment 3

[0063] Embodiment 3: a kind of TPU film and its self-repairing coating preparation method for automobile surface protection provided by the present embodiment, it is basically consistent with implementation 1, and difference is in the following differences:

[0064] The self-healing coating includes the following raw materials in parts by weight: 900 parts of isocyanate substances, 1000 parts of polyols containing conjugated structures, 12 parts of catalysts, 100 parts of chain extenders, 500 parts of solvents, 60 parts of dispersants, Foam agent 40 parts.

[0065] Wherein, the isocyanate substance is selected from modified epoxy isocyanate; the polyol containing conjugated structure is selected from 1,3 conjugated butadienyl propyl acrylate pentanediol and phenyl butadienyl Butanediol is composed of a mixture of 1::1; preferably, the chain extender is ethylenediamine; wherein, the solvent is white electric oil and isopropanol, methyl ethyl ketone and tetrahydrofuran in the or...

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Abstract

The invention discloses a thermoplastic polyurethane (TPU) thin film used for automobile surface protection. The TPU thin film comprises a polyethylene (PE) protective layer, a self-repair coating, an antifouling layer, an elastic TPU layer, an adhesive layer, a release layer and a polyethylene terephthalate (PET) layer which are sequentially stuck from top to bottom; the invention also discloses a preparation method of the self-repair coating. The TPU thin film used for automobile surface protection is ingenious and reasonable in structural design; in a process of production and processing and before use, the PE protective layer can effectively protect the self-repair coating; the self-repair coating can prevent the situation that traces are left on the surface of an automobile since the surface of the automobile is scratched, thus enabling the whole attractiveness of the automobile not to be influenced; the self-repair coating can realize self repair in temperature changes, thus achieving the effect of effectively protecting the surface of the automobile; the antifouling layer can prevent dust absorption so as to maintain the surface of the automobile to be clean and attractive; the elastic TPU layer is used as a carrier of the antifouling layer and the self-repair coating, is aging-resistant, not yellowed, mould-proof and damp-proof, and has a function of protecting a paint layer of the surface of the automobile. The TPU thin film used for automobile surface protection is good in comprehensive performance, excellent in protection effect and beneficial to extensive promotion and application.

Description

technical field [0001] The invention relates to the technical field of protective films, in particular to a TPU film used for automobile surface protection and a preparation method for a self-repairing coating thereof. Background technique [0002] With the development of the times and the progress of the society, the car has become a must-have item for the common people to travel. In order to better protect the surface of the car, a layer of paint is generally applied to the surface of the car. The method of applying paint with glitter on the surface of the car, after a period of time, the glitter will lose its luster, and repainting this kind of paint also has the disadvantages of troublesome process and not durable, and the paint itself is not reflective. Effect. Attaching an elastic TPU film on the surface of the car that is not only beautiful in color but also durable, self-repairing, anti-fouling and scratch-resistant is a fashion and trend of car film in the future, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/40B32B27/08B32B27/32B32B27/36B32B7/10B32B7/06B32B33/00C09D175/04C09D7/12C09D7/00C08G18/73C08G18/77C08G18/67C08G18/32C08G18/64C08G18/65B05D5/00B05D7/04B60R13/00
CPCB32B27/40B05D5/00B05D7/04B05D7/58B05D2451/00B05D2502/00B05D2503/00B05D2504/00B05D2508/00B05D2518/00B32B7/06B32B7/10B32B27/08B32B27/32B32B27/36B32B33/00B32B2255/10B32B2255/20B32B2255/24B32B2255/26B32B2255/28B32B2307/552B32B2307/70B32B2307/7145B32B2307/7265B32B2605/08B60R13/00C08G18/675C08G18/73C08G18/771C08L2205/025C08L2205/03C08L2205/035C09D175/04C08G18/6529C08G18/64C08G18/3228C08L5/00C08L71/02C08K5/42B05D2420/01B05D2420/03B05D2420/04
Inventor 彭权邓浩鹏
Owner DONGGUAN DINGLI FILM TECH
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