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Preparation method of flame-retardant waterborne polyurethane coating and adhesive

A water-based polyurethane, flame-retardant technology, applied in adhesives, fire-resistant coatings, bonding methods, etc., can solve the environmental hazards of heavy metal tin and other issues

Active Publication Date: 2017-03-01
GUANGZHOU WEIDISHI AUTOMOBILE ARTICLE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Dibutyltin dilaurate is often used as a catalyst in the synthesis of polyurethane, but since the heavy metal tin is harmful to the environment with the degradation of polyurethane, screening efficient and non-toxic catalysts is a major problem in the synthesis of polyurethane

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach

[0018] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be further described below in conjunction with examples

example 1

[0020] (1) Stir 25g of phosphorus pentoxide and 16g of liquid paraffin at room temperature for 30 minutes to obtain a dispersion of phosphorus pentoxide; add 37.2g of tetrakisphosphine pentoxide and 58.8g of phosphorus pentoxide dispersion to the reaction system In the process, stir and heat up to 65°C, keep stirring and react for 3h to make it fully react to obtain product A; add 55.2g of ditrimethylolpropane to the product A system, stir for 4h, and the reaction temperature is 120°C to obtain product B ; Add 88.2g of maleic anhydride, 8g of hexachlorocyclotriphosphazene, 12g of tea saponin and 4.3g of dicyclyl zirconium hydrochloride to the product B system, stir and react for 5h, the temperature of the reaction system is 120°C, add sodium alginate 2g, react at 70°C for 1 hour to obtain transparent liquid C, which is intumescent flame retardant D;

[0021] (2) In a 500ml four-neck flask equipped with a stirring blade, a thermometer, and a condenser tube, mix 112g of polytetr...

example 2

[0024] (1) Stir 25g of phosphorus pentoxide and 16g of liquid paraffin at room temperature for 30 minutes to obtain a dispersion of phosphorus pentoxide; add 37.2g of tetrakisphosphine pentoxide and 58.8g of phosphorus pentoxide dispersion to the reaction system In the process, stir and heat up to 65°C, keep stirring and react for 3h to make it fully react to obtain product A; add 55.2g of ditrimethylolpropane to the product A system, stir for 4h, and the reaction temperature is 120°C to obtain product B ; Add 88.2g of maleic anhydride, 8g of hexachlorocyclotriphosphazene, 12g of tea saponin and 4.3g of dicyclyl zirconium hydrochloride to the product B system, stir and react for 5h, the temperature of the reaction system is 120°C, add sodium alginate 2g, react at 70°C for 1 hour to obtain transparent liquid C, which is intumescent flame retardant D;

[0025] (2) In a 500ml four-necked flask equipped with a stirring blade, a thermometer and a condenser tube, mix 112g of polytet...

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PUM

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Abstract

The invention discloses a preparation method for a flame-retardant waterborne polyurethane coating and adhesive. The preparation method comprises the following steps: mixing polytetramethylene ether glycol with isocyanate in a four-neck flask equipped with a stirring blade, a thermometer and a condenser tube and having a volume of 500 ml and carrying out a reaction at a temperature of 85 DEG C for 2.5 h in the presence of 0.26 g of a catalyst dibutyltin dilaurate so as to obtain a polyurethane perpolymer A; and adding a chain extender and an intumescent flame retardant D into the polyurethane perpolymer A, carrying out a reaction at a temperature of 85 DEG C for 2.5 h, carrying out addition of triethylamine and neutralization for 60 min, carrying out addition of water and emulsification for 1 h, then adding a fire retardant E, carrying out a reaction at a temperature of 75 DEG C for 1 h and adjusting the pH value of a system to be 7 to 8 so as to form the flame-retardant waterborne polyurethane coating and adhesive. The obtained polyurethane materials have the advantages of high flame resistance, environment friendliness and low price and can meet the need of the market for low cost.

Description

technical field [0001] The preparation method of polyurethane involved in the present invention particularly relates to the preparation method of flame-retardant waterborne polyurethane coating and adhesive. Background technique [0002] Waterborne polyurethane is a polyurethane resin containing hydrophilic groups in the molecular chain of polyurethane, which has a strong affinity with water. It can be dispersed in water and form a stable system by using a specific process. Water-based polyurethane is mainly used in leather finishing, textile printing and dyeing, papermaking, architectural coatings, adhesives, etc. Almost all of the materials involved are flammable materials. If these materials are not treated with flame retardant, they will inevitably become a fire hazard. . The flame retardancy of waterborne polyurethane is one of the important directions of functionalization of waterborne polyurethane. [0003] Nanomaterials that can improve the flame retardancy of mate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/08C09D5/18C09D7/12C09J175/08C09J5/00C09J11/06C08G18/66C08G18/48
Inventor 赖生伟左正云宋睛晴丁海燕
Owner GUANGZHOU WEIDISHI AUTOMOBILE ARTICLE CO LTD
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