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Preparation method of bio-based polyurethane flame-retardant coating

A flame retardant coating, polyurethane technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of poor thermal stability and poor water resistance of phytic acid, and achieve good synergy, excellent comprehensive performance, and broad Apply space effects

Active Publication Date: 2016-07-13
JINHU JINLING NEW MATERIAL SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, phytic acid itself has poor thermal stability and is easily soluble in water, so its thermal performance does not match the decomposition of polymers, and it has the problem of poor water resistance when used as a coating.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: Prepare bio-based polyurethane flame retardant coating according to the following steps

[0022] Step (1), disperse 100g layered bishydroxyl compound in 0.5L water, stir rapidly at 60oC for 1h; add 1L (90oC, 500g / L) phytic acid aqueous solution dropwise into the layered bishydroxyl compound aqueous solution, dropwise complete Continue to react for 5 hours; wash with deionized water for 3 times, and dry at 80°C for 10 hours to obtain a layered dihydroxy compound treated with phytic acid;

[0023] Step (2), mix 100g of polyethylene glycol, 20g of ammonium polyphosphate and 20g of the treated layered bishydroxy compound of step (1) for 2h; then add 40g of toluene diisocyanate, 20g of dimethylol propionic acid and 0.1 g dibutyltin dilaurate, react at 60°C for 5h to obtain a prepolymer;

[0024] Step (3), adding 16g of 1,4-butanediol into the prepolymer, reacting at 80°C for 3h to obtain a neutralized body; after cooling down to room temperature at 25°C, addin...

Embodiment 2

[0026] Embodiment 2: Prepare bio-based polyurethane flame retardant coating according to the following steps

[0027] Step (1), disperse 50g of layered bishydroxyl compound in 0.25L of water, stir rapidly at 60oC for 1h; add 0.5L (50℃, 400g / L) phytic acid aqueous solution dropwise to the layered bishydroxyl compound aqueous solution, add dropwise After completion, continue to react for 4 hours; wash with deionized water for 3 times, and dry at 90°C for 8 hours to obtain a layered dihydroxy compound treated with phytic acid;

[0028] Step (2), mix 300g of polypropylene glycol, 100g of ammonium polyphosphate and 50g of the layered bishydroxy compound of step (1) for 2h; then add 150g of ophthalmic diisocyanate, 100g of dimethylol propionic acid and 0.5g of Stannous octoate was reacted at 90°C for 3 hours to obtain a prepolymer;

[0029] Step (3), adding 40g of 1,4-butanediol into the prepolymer, reacting at 90°C for 1 hour to obtain a neutralized body; after cooling down to roo...

Embodiment 3

[0031] Embodiment 3: Prepare bio-based polyurethane flame retardant coating according to the following steps

[0032] Step (1), disperse 200g of layered bishydroxyl compound in 1L of water, stir rapidly at 60oC for 1h; add 2L (60°C, 300g / L) phytic acid aqueous solution to the layered bishydroxyl compound aqueous solution, and continue React for 5 hours; wash with deionized water for 3 times, and dry at 100oC for 2 hours to obtain a layered dihydroxy compound treated with phytic acid;

[0033] Step (2), mix 800g of polyoxypropylene diol, 300g of ammonium polyphosphate and 100g of the layered bishydroxy compound in step (1) for 2h; then add 400g of dicyclohexylmethane diisocyanate, 200g of dimethylol Propionic acid, 1g of dibutyltin dilaurate and 1g of stannous octoate were reacted at 80°C for 4 hours to obtain a prepolymer;

[0034] Step (3): Add 90g of 1,4-butanediol to the prepolymer, react at 90°C for 1 hour to obtain a neutralized body; cool down to room temperature at 25°...

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PUM

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Abstract

The invention discloses a preparation method of a bio-based polyurethane flame-retardant coating. The bio-based polyurethane flame-retardant coating is prepared from the raw materials polyalcohol, diisocyanate, ammonium polyphosphate (APP), phytic acid, layered dihydroxyl compound, dimethylolpropionic acid, 1,4-butanediol and triethylamine by the steps of prepolymerization, neutralization, emulsifying and forming. In the invention, the phytic acid and layered dihydroxyl compound are pretreated and serve as flame-retardant additives which cooperate with an intumescent flame retardant APP for flame retardance of waterborne polyurethane so as to obtain the bio-based polyurethane flame-retardant coating with excellent comprehensive properties.

Description

technical field [0001] The invention relates to a preparation method of a flame-retardant coating, in particular to a preparation method of a bio-based polyurethane flame-retardant coating. Background technique [0002] At present, the amount of various decorative materials is increasing, and the base materials are mainly wood, bamboo or artificially synthesized polymer materials. Most of these materials are flammable. Coating a layer of flame retardant coating on the surface of these materials or impregnating the flame retardant into the material by impregnation method is a main method to improve its flame retardant performance. Polyurethane-based water-based paint is a kind of paint with good comprehensive performance and has a wide range of uses. However, polyurethane itself is also a flammable material, so it is an important direction for its development to introduce appropriate flame retardants to endow it with excellent flame retardant properties. [0003] Phytic ac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/08C09D7/12C08G18/48C08G18/66C08G18/12
CPCC08G18/12C08G18/4808C08G18/4812C08G18/6692C08K3/32C08K3/346C08K9/04C08K2003/323C09D7/61C09D7/62C09D175/08C08G18/3206
Inventor 李娟龙金林侯琳熙王文钦易思利
Owner JINHU JINLING NEW MATERIAL SCI & TECH
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