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Method for preparing flame-retardant waterproof and low-VOC polyurethane coating

A technology of polyurethane coatings and polytetrahydrofuran ether glycol, which is applied in the direction of polyurea/polyurethane coatings, fireproof coatings, coatings, etc., and can solve problems such as heavy metal tin hazards

Active Publication Date: 2016-12-14
HEBEI CHENYANG INDAL & TRADE GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Dibutyltin dilaurate is often used as a catalyst for the polymerization of polyurethane, but since the heavy metal tin is harmful to the environment with the degradation of polyurethane, how to fix the residual tin catalyzed by dibutyltin dilaurate and reduce the impact of polyurethane coating residues on the environment The degree of harm has become a technical problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0036] (1) Preparation of modified manganese hypophosphite: Add 11.2 g of manganese hypophosphite, 25.6 g of boric acid, 28 g of diethanolamine, 7.2 g of hexaphenoxycyclotriphosphazene and Phloridzin 2.8g and water 65g, adjust the pH to 4, heat to 80°C, stir for 2 hours, add 1.6g of dipotassium edetate, stir for 1 hour at 70°C to obtain modified manganese hypophosphite;

[0037] (2) Add 0.25g of dibenzyl azodicarboxylate, 72g of polytetrahydrofuran ether glycol and 18g of hexamethylene diisocyanate into a 250ml three-necked flask equipped with a stirrer, condenser and thermometer, and react at 70°C 1h, to obtain polyurethane prepolymer A, the molecular weight of the polytetrahydrofuran ether glycol is 500;

[0038] (3) Add 0.68g of hexahydro-striazaborane and 8.8g of methyl ethyl ketone to prepolymer A, react at 70°C for 3.0h, add 1g of modified manganese hypophosphite prepared in step (1), 3.2g4 -Carboxyphenylboronic acid and N-hydroxysulfosuccinimide 3.5g, reaction temperat...

example 2

[0040] (1) Preparation of modified manganese hypophosphite: Add 5.2g of manganese hypophosphite, 8g of boric acid, 18g of diethanolamine, 14g of diphenylglycolic acid and 4-hydroxyphenylethyl ether in a 250ml three-necked bottle equipped with a stirrer and a thermometer 2.9g of amine and 70g of water, adjust the pH to 4, heat to 60°C, stir for 2h, add 1.6g of dipotassium ethylenediaminetetraacetate, stir for 2h at 70°C to obtain modified manganese hypophosphite;

[0041] (2) Add 0.74g of tetramethylammonium chloride, 70g of polytetrahydrofuran ether glycol and 30g of hexamethylene diisocyanate into a 500ml three-necked flask equipped with a stirrer, condenser and thermometer, and react at 80°C 4h, to obtain polyurethane prepolymer A, the molecular weight of the polytetrahydrofuran ether glycol is 1000;

[0042] (3) Add 3.5g of trimethylsilanol and 16.8g of methyl ethyl ketone to prepolymer A, react at 75°C for 3.5h, add 7.2g of modified manganese hypophosphite prepared in step...

example 3

[0044] (1) Preparation of modified manganese hypophosphite: Add 8.2g of manganese hypophosphite, 26.4g of boric acid, 22.6g of diethanolamine, 13g of hexamethylolmelamine and diphenyl Glycolic acid 2.8g and water 55g, adjust pH to 4, heat to 80°C, stir for 1 hour, dipotassium ethylenediaminetetraacetic acid 0.9g, stir for 2 hours at 60°C to obtain modified manganese hypophosphite;

[0045] (2) Add 0.52g of stearyl trimethylammonium chloride, 80g of polytetrahydrofuran ether glycol and 36g of hexamethylene diisocyanate into a 500ml three-necked flask equipped with a stirrer, a condenser and a thermometer. Reaction at ℃ for 2 hours to obtain polyurethane prepolymer A, the molecular weight of the polytetrahydrofuran ether diol is 1000;

[0046] (3) Add 2.6g of nitrilotriacetic acid and 21.4g of methyl ethyl ketone to prepolymer A, react at 80°C for 2.5h, add 7.9g of modified manganese hypophosphite and 4-carboxyphenylboronic acid prepared in step (1) 4.8g and 3.6g of diphenylmet...

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PUM

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Abstract

The invention discloses a method for preparing a flame-retardant waterproof and low-VOC polyurethane coating. The method comprises the following steps: adding 3.5 g of trimethyl hydroxysilane and 16.8 g of methyl ethyl ketone into a prepolymer A, enabling the components to react for 3.5 hours at 75 DEG C, adding 7.2 g of modified manganese hypophosphite, 3.6 g of 4-carboxyl phenylboronic acid and 2.8g of nitrilotriacetic acid which are prepared in step (1), enabling the components to react for 1 hour at the reaction temperature of 85 DEG C, adding 14.5 g of nitrilotriacetic acid, performing neutral reaction for 60 minutes, adding 2.8 g of 4,8-di-hydroxyquinoline-2-formic acid and 110 g of water, and performing stirring emulsification for 1 hour to obtain the flame-retardant waterproof and low-VOC polyurethane coating. The prepared flame-retardant waterproof and low-VOC polyurethane coating is environment-friendly and low in price, can be widely applied to surfaces of walls, furniture and metal tools, and can be used as an adhesive of plastic, glass, paper and textile.

Description

technical field [0001] The invention relates to a preparation method of a polyurethane coating, in particular to a preparation method of a flame-retardant, waterproof and low-VOC polyurethane coating. Background technique [0002] Polyurethane is mainly used in leather finishing, textile printing and dyeing, paper making, architectural coatings and adhesives and other fields. Because the coatings and paints sprayed on the surface of internal and external walls, furniture or metal appliances are in direct or indirect contact with humans, toxic and harmful coatings are always threatening people's health. In addition, because the field of use is often exposed to sunlight, and the sun's rays contain a large amount of ultraviolet light harmful to colored objects, with a wavelength of about 290-460nm, these harmful ultraviolet rays cause the color of the paint to change through chemical oxidation and reduction. Variety. [0003] Dibutyltin dilaurate is often used as a catalyst f...

Claims

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Application Information

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IPC IPC(8): C09D175/08C09D5/18C08G18/10C08G18/73C08G18/66C08G18/48C08G18/16C08G18/22C08K9/02C08K9/04C08K3/32
CPCC08G18/0823C08G18/10C08G18/168C08G18/222C08G18/225C08G18/4854C08G18/73C08G18/833C08G18/838C08K3/32C08K9/02C08K9/04C09D5/18C09D175/08C08G18/345C08G18/3897C08G18/3893C08G18/3821
Inventor 段宝荣翟智宇
Owner HEBEI CHENYANG INDAL & TRADE GROUP CO LTD