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Anironic polyurethane modifying paste and preparing method and use thereof

An anionic, polyurethane technology, applied in polyurea/polyurethane coatings, coatings, etc., to achieve the effects of small slump, good solvent resistance, and high adhesive performance

Inactive Publication Date: 2004-04-14
上海高分子材料研究开发中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention in order to solve the above problems, greatly improved its water resistance by introducing a crosslinked structure in the macromolecule of anionic polyurethane aqueous dispersion; , Easy-to-apply paste, no uneven thickness and sagging when used on non-horizontal base surfaces

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0010] Below in conjunction with example the present invention is described in detail, and the manufacture technology of this chemical product is relatively clear to the people of this specialty.

[0011] The specific formula of anionic polyurethane modification paste is: TDI-100: 120g; HDI: 10g; Seike: 10g; PPG-210: 70g; PPG220: 200g; ethylene glycol: 20g; DMPA: 20g; TEA: 16g; : 100g; DMF: 20g; ethyl acetate: 20g; deionized water: 500g; lightweight porous material: 200g.

[0012] The specific preparation method of anionic polyurethane modification paste is as follows:

[0013] Part or all of the aliphatic or aromatic diisocyanate (A) and the treated polyol (B) (C) are prepolymerized at a molar ratio of NCO / OH(NH)=1.5-2.5 at 40-80°C React for 1 to 6 hours. After the prepolymerization is completed, add (D) accounting for 2 to 20% of the total amount of the polymer and add a low molecular weight diol or diol with a molar ratio of 0.5 to 0.95:1 to the remaining isocyanate. The ...

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PUM

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Abstract

The present invention relates to an anionic type polyurethane finishing paste, its preparation method and application. It is characterized by that it is made up by using the components of (A) diisocyanate, (B) macromolecular or low-molecular compound with active amino-group and hydroxide radical, (C) dtribasic alcohol compound, (D). carboxy group containing dibasic alcohol, (E) neutralizing agent and (F) a light porous material through a certain reaction and synthesis process. As compared with existent technology said invented product has higher hardness, good solvent resistance, water-proofing property, higher adhesive property and smaller caving degree, after it is film-formed, said film has micropore structure.

Description

[technical field] [0001] The invention relates to the technical field of chemical industry, in particular to an anionic polyurethane modification paste, its preparation method and application. [technical background] [0002] A common weakness of water-dispersed materials is poor water resistance, especially for single-component water-dispersed materials, and polyurethane water dispersions also have the weakness of poor water resistance, which brings great challenges to the application of polyurethane water dispersions. In addition, the usual anionic polyurethane aqueous dispersion is mostly liquid, with low solid content and easy flow. It is easy to cause uneven thickness when used on a non-horizontal base surface, and it also produces sagging, which affects the application effect. [Content of the invention] [0003] The purpose of the present invention in order to solve the above problems, greatly improved its water resistance by introducing a crosslinked structure in the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/00C09D175/04
Inventor 白子文
Owner 上海高分子材料研究开发中心