Peelable and biodegradable polyurethane protective film, preparation method and application thereof

A biodegradable polyester and biodegradable technology, which is applied in the field of peelable biodegradable polyurethane protective film and its preparation, can solve the problems of poor mechanical properties, volatilization of organic solvents, and a large amount of waste, and achieve good anti-corrosion performance and durability. Effect of degradability, high elasticity and tensile strength, good biodegradability

Active Publication Date: 2016-08-31
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a large amount of waste is generated during the application of the product, which will cause environmental pollution
[0003] However, most of the existing peelable protective films are prepared by the solvent method, and the addition of solvents during the preparation process causes the volatilization of organic solvents, causing pollution to the environment
At present, the film-forming material of this kind of protective film is single and the cost is high, the mechanical properties are not good, especially the elasticity and anti-collision aspects need to be improved, and the formula is complicated, the construction is inconvenient, and some even contain toxic substances, which cannot meet all the current metal raw materials and materials. The need for surface protection of semi-finished products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The present invention adopts polyester polyurethane as the method for the preparation of peelable biodegradable protective film of film-forming substrate, comprises the following steps:

[0028] The strippable biodegradable protective film of the present invention, its composition and each component weight portion are as follows: thermoplastic polyurethane 40g, biodegradable polyester (polylactic acid) 10g, corrosion inhibitor 0.5g (amino acid), filler 1g (silicon Alite), plasticizer 5g (glycerin, glyceryl citrate).

[0029] The preparation method of the strippable biodegradable protective film of the present invention comprises:

[0030] 1) material selection: select materials according to the composition specified in the above formula and the parts by weight of each component;

[0031] 2) Put thermoplastic polyurethane, biodegradable polyester, plasticizer, filler, and corrosion inhibitor into an internal mixer, control the temperature at 140°C, and stir and mix for ...

Embodiment 2

[0036] Polyester polyurethane is the preparation method of the strippable biodegradable protective film of film-forming substrate, and its production steps are:

[0037] The strippable biodegradable protective film of the present invention, its composition and the parts by weight of each component are as follows: thermoplastic polyurethane 50g, biodegradable polyester (polybutylene succinate) 15g, corrosion inhibitor 0.35g (amino acid) , filler 2g (diatomaceous earth), plasticizer 15g (glycerin, glyceryl citrate).

[0038] The preparation method of the strippable biodegradable protective film of the present invention comprises:

[0039] 1) material selection: select materials according to the composition specified in the above formula and the parts by weight of each component;

[0040] 2) Put thermoplastic polyurethane, biodegradable polyester, plasticizer, filler, and corrosion inhibitor into the internal mixer, control the temperature at 150°C, stir and mix for 9 minutes un...

Embodiment 3

[0045] Polyester polyurethane is the preparation method of the strippable biodegradable protective film of film-forming substrate, and its production steps are:

[0046] The strippable biodegradable protective film of the present invention has the following composition and parts by weight of each component: thermoplastic polyurethane 65g, biodegradable polyester (polycaprolactone) 20g, corrosion inhibitor 0.25g (amino acid), filler 3g (diatomaceous earth), plasticizer 20g (glycerin, glyceryl citrate).

[0047] The preparation method of the strippable biodegradable protective film of the present invention comprises:

[0048] 1) material selection: select materials according to the composition specified in the above formula and the parts by weight of each component;

[0049] 2) Put thermoplastic polyurethane, biodegradable polyester, plasticizer, filler, and corrosion inhibitor into the internal mixer, control the temperature at 160°C, stir and mix for 11 minutes until all comp...

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PUM

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Abstract

The invention discloses a peelable and biodegradable polyurethane protective film, a preparation method and application thereof. The protective film comprises the following raw materials by weight: 40-70 parts of thermoplastic polyurethane, 10-30 parts of biodegradable polyester, 0.01-0.5 part of a corrosion inhibitor, 1-10 parts of filler and 5-30 parts of a plasticizer. The preparation method comprises: 1) selecting materials according to the composition and weight part of each component prescribed in the formula; 2) putting the raw materials into a banbury mixer, performing stirring at 140-180DEG C for 5-15min till uniform mixing melting; 3) carrying out extrusion granulation and cooling to obtain an anti-bump and anti-corrosion protective film particle semi-finished product, during use, heating the semi-finished product to 160DEG C to melt it into liquid, then spraying the liquid on a metal component surface, and conducting cooling so as to form a 3-5micrometer protective film. The peelable and biodegradable polyurethane protective film provided by the invention has a simple formula and no pollution, and is especially suitable for temporary protection of metal raw materials and semi-finished products. The peelable and biodegradable polyurethane protective film is convenient to make and use, has no residual protective film after peeling, and can be biodegradable after abandonment.

Description

【Technical field】 [0001] The invention belongs to the field of polymer material production, and in particular relates to a peelable and biodegradable polyurethane protective film and its preparation method and application. 【Background technique】 [0002] In order to avoid damage and short-term corrosion of metal raw materials and semi-finished products during transportation and storage, a peelable protective film is used to protect their appearance and performance, which can be completely peeled off during subsequent processing or assembly of metal materials and semi-finished products to achieve quick unpacking . However, a large amount of waste is generated during the application of the product, which will cause environmental pollution. [0003] However, most of the existing peelable protective films are prepared by the solvent method, and solvents are added during the preparation process to cause volatilization of organic solvents and cause pollution to the environment. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/06C09D167/04C09D167/02C09D5/20C09D5/08C09D5/16C09D7/12
CPCC08L2201/06C08L2205/02C08L2205/03C09D5/08C09D5/16C09D5/20C09D7/61C09D7/63C09D175/06C08L67/04C08K13/02C08K3/36C08K5/053C08K5/11C08L67/02
Inventor 张敏张璐李成涛李艺晨
Owner SHAANXI UNIV OF SCI & TECH
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