Environment-friendly polyurethane waterproof coating

A polyurethane waterproof and environmentally friendly technology, applied in the field of waterproof coatings and polyurethane waterproof coatings, can solve the problem of high formulation difficulty and achieve the effects of good curing effect, uniform dispersion and excellent spreading performance.

Active Publication Date: 2016-10-12
SICHUAN SHUYANG WATERPROOF MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since one-component polyurethane waterproof coatings have particularly high requirements for process and formula difficulty, and when MDI is used to produce polyurethane waterproof coatings, the requirements for process and formula are higher than those of TDI, so there are almost no MDI-type one-component environmentally friendly polyurethane waterproof coatings in the market

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) According to the amount of substances, mix 7 parts of hexanediol and 5 parts of adipic acid evenly and raise the temperature to 100°C, add 0.03 parts of n-tetrabutoxytitanium and raise the temperature to 180°C at a heating rate of 2°C / min After reacting at this temperature for 0.5h, add 0.01 part of n-tetrabutoxytitanium, raise the temperature to 200°C at a heating rate of 1°C / min, and react for 0.5h to obtain a crystalline polyester polyol with an average molecular weight of 1800. DSC test shows obvious crystal melting peak;

[0019] (2) In parts by mass, mix 5 parts of the above-mentioned crystalline polyester polyol with 10 parts of polyurethane resin, 1 part of 4,4'-diphenylmethane diisocyanate (MDI), 10 parts of chlorinated paraffin-42, 5 parts of PPG2000, 10 parts of light calcium with a particle diameter of 300 meshes, 10 parts of heavy calcium with a particle diameter of 500 meshes, 0.5 parts of S-150 aromatic oil, and 0.05 parts of T-12 catalyst are mixed t...

Embodiment 2

[0021] (1) According to the amount of substances, mix 8 parts of hexanediol and 5 parts of dodecyl dicarboxylic acid evenly and raise the temperature to 120°C, add 0.04 parts of n-tetrabutoxytitanium at a heating rate of 2°C / min Raise the temperature to 180°C, react at this temperature for 1 hour, then add 0.01 part of n-tetrabutoxytitanium, raise the temperature to 210°C at a heating rate of 1°C / min, and react for 1 hour to obtain a crystalline polyester with an average molecular weight of 3500. Alcohol, DSC test shows obvious crystalline melting peak;

[0022] (2) In parts by mass, mix 10 parts of the above-mentioned crystalline polyester polyol with 20 parts of polyurethane resin, 5 parts of 4,4'-diphenylmethane diisocyanate (MDI), 20 parts of chlorinated paraffin-42, 15 parts of PTMG650, 20 parts of particle diameter are 600 mesh light calcium, 15 parts of particle diameter are 900 mesh heavy calcium, 2 parts of S-150 aromatic hydrocarbon oil, 0.1 part of T-12 catalyst are...

Embodiment 3

[0024] (1) According to the amount of substances, mix 8 parts of hexanediol and 6 parts of decanyl dicarboxylic acid evenly and raise the temperature to 110°C, add 0.03 parts of n-tetrabutoxytitanium and raise the temperature at a heating rate of 2°C / min to 170°C, react at this temperature for 1 hour, then add 0.01 part of n-tetrabutoxytitanium, raise the temperature to 200°C at a rate of 1°C / min, and react for 0.5 hours to obtain a crystalline polyester multi-component with an average molecular weight of 2500. Alcohol, DSC test shows obvious crystalline melting peak;

[0025] (2) In parts by mass, mix 8 parts of the above-mentioned crystalline polyester polyol with 15 parts of polyurethane resin, 3 parts of 4,4'-diphenylmethane diisocyanate (MDI), 15 parts of chlorinated paraffin-52, 10 parts of PPG400, 15 parts of light calcium with a particle diameter of 500 meshes, 12 parts of heavy calcium with a particle diameter of 800 meshes, 1 part of S-150 aromatic oil, and 0.1 part ...

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Abstract

The invention discloses an environment-friendly polyurethane waterproof coating. The environment-friendly polyurethane waterproof coating comprises the following components: 10-20 parts of polyurethane resin, 1-5 parts of diphenyl-methane-diisocyanate, 10-20 parts of chlorinated paraffin, 5-15 parts of polyether polyol, 5-10 parts of crystalline polyester polyol, 10-20 parts of light calcium carbonate, 10-20 parts of heavy calcium carbonate, 0.5-2 parts of aromatic hydrocarbon and 0.05-0.1 part of a catalyst. The obtained polyurethane waterproof coating does not use high-toxicity TDI, and is environment-friendly. The obtained polyurethane waterproof coating is less than or equal to 7 h in surface drying time, less than or equal to 22 h in hard drying time, more than 1.1 Mpa in bonding strength, more than 580% in elongation at break and more than 25 N / mm in tearing strength.

Description

technical field [0001] The invention relates to the technical field of waterproof coatings, in particular to the technical field of polyurethane waterproof coatings. Background technique [0002] Traditional polyurethane waterproof coatings mostly use toxic toluene diisocyanate TDI as the main raw material. TDI has lower requirements for process control in the production process and the performance of the produced polyurethane waterproof coatings is relatively stable, but TDI itself has great toxicity. , In the production process, the toxicity of itself cannot be reacted, so the produced polyurethane waterproof coating is toxic. From the perspective of the development trend of waterproof coatings, environmentally friendly waterproof coatings are becoming more and more popular. In view of the higher toxicity of TDI, diphenylmethane diisocyanate MDI can be used to replace the toxic toluene diisocyanate, and the prepolymer is prepared by using basically non-toxic MDI, without ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/06C09D175/08C09D175/04C09D191/06C09D191/00C09D7/12C08G18/76C08G18/48C08G18/42
CPCC08G18/4018C08G18/7671C08K2201/014C08L2205/02C08L2205/035C09D175/06C09D175/08C09D7/61C08L75/04C08L91/06C08L91/00C08K2003/265
Inventor 骆晓彬
Owner SICHUAN SHUYANG WATERPROOF MATERIAL
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