Preparation method of anti-yellowing TPU and TPU protective film

A technology of yellowing resistance and protective film, applied in the field of TPU, can solve the problems of poor yellowing resistance, residual glue on the car paint surface, scratches on the car paint surface, etc., to enhance heat resistance, good protection effect, reduce The effect of dust adhesion

Active Publication Date: 2021-12-31
东莞市米儿塑胶原料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The environmental protection and aging problems of PVC have not been effectively solved. Due to its poor yellowing resistance, it needs to be replaced after about 2 years of use.
In addition, during the replacement process, it is not uncommon to scratch the car paint surface due to the operation of removing glue
[0004] Although the TPU protective films on the market can basically achieve the effect of anti-yellowing, most of them do not meet the standard environmental protection requirements of fluorine-free
In addition, most TPU protective films have no antistatic function, so they must be dusted frequently after a period of use, and after the protective film is removed, there will often be residual glue on the paint surface of the car

Method used

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  • Preparation method of anti-yellowing TPU and TPU protective film
  • Preparation method of anti-yellowing TPU and TPU protective film
  • Preparation method of anti-yellowing TPU and TPU protective film

Examples

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preparation example Construction

[0038] The present invention provides a kind of preparation method of anti-yellowing TPU, the preparation method of this anti-yellowing TPU comprises:

[0039] Step a1, put the isocyanate and the dihydroxy water repellent into the reaction vessel, raise the temperature to 85-95°C and stir for more than 0.5h;

[0040] Step a2, putting polyglycol, 1,4 butanediol, graphene, anti-yellowing agent, antioxidant and catalyst into the reaction vessel, and stirring for more than 1 hour;

[0041] Step a3, put the monohydroxyl water repellant into the reaction vessel, and stir for more than 0.5h;

[0042] Step a4. Bake the stirred material at a temperature of 75-85° C. for more than 10 hours to form an anti-yellowing TPU.

[0043] Among them, in step a1, the dihydroxy water-repellent agent participates in part of the chain extension, the purpose of which is to ensure that the main chain of TPU has sufficient water-repellent function; the addition of a single-hydroxyl water-repellent agen...

Embodiment 1

[0080] The present embodiment provides a kind of preparation method of TPU protective film, and this preparation method comprises:

[0081] The first stage, preparation of anti-yellowing TPU:

[0082] The weight of each component of anti-yellowing TPU is as follows:

[0083]

[0084] Step a1, put IPDI and PDS 1000 into the reaction vessel, raise the temperature to 90°C and stir for 1h;

[0085] Step a2, put PC 2000, 1,4-butanediol, graphene, UV-328, 1010 antioxidant and stannous octoate into the reaction vessel, and stir for 2 hours;

[0086] Step a3, put PMS 500 into the reaction vessel, and stir for 1 hour;

[0087] Step a4, baking the stirred material at a temperature of 80° C. for 14 hours to form an anti-yellowing TPU.

[0088] The second stage, preparation of anti-yellowing pressure-sensitive adhesive:

[0089] Prepare the first pressure-sensitive adhesive raw material, the weight of each component is:

[0090]

[0091] Step c1, put polypropylene glycol 2000, ...

Embodiment 2

[0103] The present embodiment provides a kind of preparation method of TPU protective film, and this preparation method comprises:

[0104] The first stage, preparation of anti-yellowing TPU:

[0105] The weight of each component of anti-yellowing TPU is as follows:

[0106]

[0107] Step a1, H 12 Put MDI and PDS 1000 into the reaction vessel, raise the temperature to 90°C and stir for 1h;

[0108] Step a2, put PTMEG 2000, 1,4-butanediol, graphene, UV-328, 1010 antioxidant and stannous octoate into the reaction vessel, and stir for 2 hours;

[0109] Step a3, put PMS 500 into the reaction vessel, and stir for 1 hour;

[0110] Step a4, baking the stirred material at a temperature of 80° C. for 14 hours to form an anti-yellowing TPU.

[0111] The second stage, preparation of anti-yellowing pressure-sensitive adhesive:

[0112] Prepare the first pressure-sensitive adhesive raw material, the weight of each component is:

[0113]

[0114] Step c1, put polypropylene glyco...

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Abstract

The invention relates to an anti-yellowing TPU and a preparation method of a TPU protective film; the preparation method of the anti-yellowing TPU comprises the following steps: a1, putting isocyanate and a dihydroxy water repellent into a reaction container, heating to 85-95 DEG C, and stirring for more than 0.5 h; a2, putting polydihydric alcohol, 1,4-butanediol, graphene, an anti-yellowing agent, an antioxidant and a catalyst into a reaction container, and stirring the material for more than 1 hour; a3, putting a monohydroxy water repellent into the reaction container, and stirring the material for more than 0.5 h; a4, baking the stirred material at the temperature of 75-85 DEG C for more than 10 hours to form the yellowing-resistant TPU. The pressure-sensitive adhesive is sprayed on the yellowing-resistant TPU, so that the TPU protective film can be formed. By adding the graphene, the antistatic function is achieved, dust attachment is reduced, the heat resistance is enhanced, and a better protection effect can be achieved.

Description

technical field [0001] The invention relates to the field of TPU, in particular to a preparation method of an anti-yellowing TPU and a TPU protective film. Background technique [0002] In order to protect the body paint of the car, some users will stick a protective film on the car body. Some protective films can also achieve the purpose of decorating the car body, and can be easily removed at any time. It is different from traditional sealing glaze, coating, spray paint and other paint surfaces. The chemical changes are in stark contrast. The materials used to make car protective films mainly include PVC and TPU. [0003] The environmental protection and aging problems of PVC have not been effectively solved. Due to its poor yellowing resistance, it needs to be replaced after about 2 years of use. In addition, during the replacement process, it is not uncommon to scratch the car paint surface due to the operation of removing glue. [0004] Although the TPU protective fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/44C08G18/48C08G18/61C08G18/32C08G18/28C08K3/04C09J7/25C09J7/38
CPCC08G18/6637C08G18/6674C08G18/44C08G18/4854C08G18/61C08G18/3206C08G18/289C08K3/042C08J5/18C09J7/25C09J7/38C09J2301/124C09J2301/302C09J2475/006C09J2475/00
Inventor 贺平
Owner 东莞市米儿塑胶原料有限公司
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