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A polyurethane elastomer containing two kinds of heteroatoms in the hard segment, a modified polyurethane anti-corrosion peelable film and its preparation method and application

A polyurethane elastomer and heteroatom technology, applied in polyurea/polyurethane coatings, anti-corrosion coatings, coatings, etc., can solve the problems of inability to achieve anti-corrosion performance, inability to coat the film to prevent rust, etc., and achieve good peelability and Effects of anti-corrosion performance, excellent anti-corrosion, and excellent adsorption capacity

Active Publication Date: 2020-12-04
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Generally speaking, only through the isolation and shielding effect of the coating film, the coating film cannot prevent rust for a long time, because the physical shielding effect is to separate the metal surface from the environment, and usually polymer coatings have certain air permeability , and is closely related to its structure, and the impermeability of the coating is the key to the shielding effect of the coating, so only the shielding effect cannot achieve long-term anti-corrosion performance

Method used

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  • A polyurethane elastomer containing two kinds of heteroatoms in the hard segment, a modified polyurethane anti-corrosion peelable film and its preparation method and application
  • A polyurethane elastomer containing two kinds of heteroatoms in the hard segment, a modified polyurethane anti-corrosion peelable film and its preparation method and application
  • A polyurethane elastomer containing two kinds of heteroatoms in the hard segment, a modified polyurethane anti-corrosion peelable film and its preparation method and application

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preparation example Construction

[0034] refer to Figure 10 , a method for preparing a modified polyurethane anti-corrosion peelable film containing two kinds of heteroatoms in the hard segment of the present invention, comprising the following steps:

[0035]Step 1, in parts by mass, add 5-10 parts of organic acid to 95-190 parts of organic solvent absolute ethanol to prepare solution 1; add 5-10 parts of oxides with anti-corrosion function In the above solution 1, stir at 40-60°C for 4-8 hours at a stirring speed of 120-240r / min, filter and wash with organic solvent anhydrous ethanol several times, and dry at 30-100°C. The modified oxide is obtained; the added oxide is one or more of aluminum oxide, zinc oxide, iron oxide, ferric oxide, and silicon dioxide mixed in any proportion; the particle size of the modified oxide obtained is 200-800 mesh. The organic acid used is one or more of lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, arachidic acid and the like. Preferably, the amount ...

Embodiment 1

[0051] A method for preparing a modified polyurethane anti-corrosion peelable film containing two kinds of heteroatoms in the hard segment, comprising the following steps:

[0052] 1) In terms of parts by mass, add 5 parts of stearic acid to 95 parts of absolute ethanol to prepare solution 1; add 5 parts of alumina to the above solution 1, and stir at 60°C at 180r / min for 6h , filtered and washed several times with absolute ethanol, and dried at 60°C to obtain treated modified alumina;

[0053]2) In terms of parts by mass, add 50 parts of purified polytetrahydrofuran ether glycol 1000 to 40 parts of molten 4,4'-methylene bis(phenylisocyanate), at 80°C 75r / min stirring for 0.5h to prepare a prepolymer; add 5 parts of 2,2'-thiobis-ethanol and 5 parts of N-methyldiethanolamine to the prepolymer, stir at 75r / min at 80°C for 1h, and Aging treatment at 110°C for 6 hours to obtain a polyurethane elastomer containing sulfur and nitrogen in the hard segment;

[0054] 3) In terms of ...

Embodiment 2

[0056] A method for preparing a modified polyurethane anti-corrosion peelable film containing two kinds of heteroatoms in the hard segment, comprising the following steps:

[0057] 1) In terms of mass parts, add 10 parts of oleic acid to 190 parts of acetone to prepare solution 1; add 10 parts of zinc oxide to the above solution 1, stir at 180r / min at 60°C for 6h, and use acetone Suction filtration and washing several times, drying at 60°C to obtain treated modified zinc oxide;

[0058] 2) In terms of parts by mass, add 50 parts of purified polytetrahydrofuran ether glycol 1000 to 40 parts of molten 4,4'-methylene bis(phenylisocyanate), at 80°C 75r / Min stirring for 0.5h to prepare a prepolymer; add 5 parts of 2,2'-thiobis-ethanol and 5 parts of diethylene glycol to the prepolymer, stir at 75r / min at 80°C for 1h, and Curing at 110°C for 6 hours to obtain a polyurethane elastomer containing sulfur and oxygen in the hard segment;

[0059] 3) In terms of parts by mass, add 20 p...

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Abstract

The invention discloses a polyurethane elastomer containing two hetero atoms in a hard segment, modified polyurethane anti-corrosion peelable film, a preparation method and application thereof. An oxide with corrosion resistance modified by organic long-chain alkanoic acid is used as a filler; the polyurethane elastomer containing the two hetero atoms in the hard segment synthesized by using 50-75parts of oligomer diol, 24-40 parts of diisocyanate and 1-10 parts of chain extenders containing the hetero atoms as a raw material is used as a substrate. The preparation method of the modified polyurethane anti-corrosion peelable film is simple to operate and low in reaction energy consumption; the raw material source is wide, economical and easy to obtain, the method is suitable for industrialproduction, has good peelability, can be recycled and has no pollution to the environment, and the film can effectively protect metal products, and have good anti-corrosion effect especially in an acidic environment and a coastal environment.

Description

technical field [0001] The invention belongs to the technical field of metal material surface treatment, and in particular relates to a polyurethane elastomer whose hard segment contains two kinds of heteroatoms, a modified polyurethane anti-corrosion peelable film, a preparation method and application thereof. Background technique [0002] With the advancement and development of science and technology, metals have been used in various fields, and the problem of metal corrosion has become more and more serious, which has not only caused an extreme waste of resources, but also brought disasters. Corrosion easily occurs during the preparation, transportation and storage of metal products, resulting in damaged appearance and reduced performance. The anti-corrosion peelable film is a temporary protective material, which can not only effectively block the corrosion of metal materials by corrosion particles, but also can be quickly peeled off during use, and can be recycled and re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/32C08K9/04C08K3/36C08K3/22C09D5/08C09D5/20C09D175/08
CPCC08G18/3206C08G18/3275C08G18/3868C08G18/4829C08G18/4854C08G18/6674C08G18/6688C08K3/22C08K3/36C08K9/04C08K2003/2227C08K2003/2272C08K2003/2275C08K2003/2296C09D5/08C09D5/20C09D175/08
Inventor 张敏韩俊文李成涛
Owner SHAANXI UNIV OF SCI & TECH
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