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Preparation method of fire retardant coating

A technology of flame-retardant coatings and montmorillonite, which is applied in the field of preparation of flame-retardant coatings, can solve the problem of less cellulose and achieve excellent mechanical properties

Active Publication Date: 2013-11-06
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Among the published patents, there are relatively few literature reports on the use of cellulose for flame retardancy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Step (1). 90 grams of polyethylene glycol, 15 grams of ammonium polyphosphate, and 15 grams of montmorillonite were mixed and stirred for 3 hours, and then 100.2 grams of isophorone diisocyanate, 18 grams of dimethylol propionic acid, 0.15 gram of dibutyltin dilaurate, reacted for 5 hours at 60°C to obtain a prepolymer;

[0020] Step (2). Add 8.4 grams of 1,4-butanediol to the prepolymer and react at 60°C for 3 hours to obtain a neutralized body;

[0021] Step (3). The neutralizer is cooled to 40° C., 13.8 grams of triethylamine are added to react for 2 hours, then the aqueous solution of nano-microcrystalline cellulose is added through the dispersion treatment, and stirred for 2 hours at a stirring speed of 1000 r / min to obtain Emulsion;

[0022] Wherein the nano-microcrystalline cellulose aqueous solution is obtained by adding 9 grams of nano-microcrystalline cellulose into deionized water and stirring at a stirring speed of 1000r / min for 4 hours;

[0023] Step (4)....

Embodiment 2

[0025] Step (1). Mix and stir 162 gram polypropylene glycol, 15 gram ammonium polyphosphate, 10 gram montmorillonite for 4 hours, then add 118.2 gram dicyclohexylmethane diisocyanate, 12 gram dimethylol propionic acid, 0.3 gram octanoic acid Stannous, reacted at 80°C for 3 hours to obtain a prepolymer;

[0026] Step (2). Add 8.4 grams of 1,4-butanediol to the prepolymer and react at 80°C for 1 hour to obtain a neutralized body;

[0027] Step (3). The neutralizer is cooled to 50° C., 9 grams of triethylamine is added to react for 1 hour, and then the nano-microcrystalline cellulose aqueous solution after dispersion treatment is added, and stirred for 1 hour at a stirring speed of 1500 r / min to obtain Emulsion;

[0028] Wherein the nano-microcrystalline cellulose aqueous solution was obtained by adding 9 grams of nano-microcrystalline cellulose into deionized water and stirring at a stirring speed of 1500r / min for 3 hours;

[0029] Step (4). Transfer the emulsion to the templa...

Embodiment 3

[0031] Step (1). 99 grams of castor oil, 12 grams of ammonium polyphosphate, and 12 grams of montmorillonite were mixed and stirred for 3.5 hours, and then 112.8 grams of diphenylmethane diisocyanate, 12 grams of dimethylol propionic acid, 0.2 grams of diisocyanate were added. Dibutyltin laurate, reacted at 70°C for 4 hours to obtain a prepolymer;

[0032] Step (2). Add 8.4 grams of 1,4-butanediol to the prepolymer and react at 70°C for 2 hours to obtain a neutralized body;

[0033] Step (3). The neutralization body was cooled to 45° C., 9 grams of triethylamine was added to react for 2 hours, and then the aqueous solution of nano-microcrystalline cellulose was added after dispersion treatment, and stirred for 1.5 hours at a stirring speed of 1200 r / min to obtain Emulsion;

[0034] Wherein the nano-microcrystalline cellulose aqueous solution was obtained by adding 9 grams of nano-microcrystalline cellulose into deionized water and stirring at a stirring speed of 1200r / min for...

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Abstract

The invention relates to a preparation method of a fire retardant coating. The preparation method comprises the following steps of: firstly, mixing polyalcohol, ammonium polyphosphate and montmorillonite for stirring; adding diisocyanate, dimethylolpropionic acid and a catalyst into the obtained mixture; after reaction, obtaining a prepolymer; adding 1, 4-butanediol into the prepolymer, carrying out reaction and obtaining a neutral body; cooling the neutral body and then adding triethylamine into the cooled neutral body for reaction; adding nano-microcrystalline cellulose water solution treated by dispersion into the reaction product, stirring and obtaining emulsion; and transferring the emulsion into a template, molding and obtaining the fire retardant coating. According to the method, polyurethane is taken as a film forming matter, the nano-microcrystalline cellulose is taken as a carbonizing agent, the ammonium polyphosphate is taken as an acid source and a gas source, and the montmorillonite has the reinforcement function. The fire retardant coating prepared by the invention is free from pollution, is safe and reliable, is good in mechanical performance, and does not emit corrosive gases such as hydrogen halide and the like when being decomposed by heating.

Description

technical field [0001] The invention relates to a preparation method of a flame-retardant coating, in particular to a preparation method of an intumescent waterborne polyurethane flame-retardant coating. Background technique [0002] At present, the amount of wood materials and paints used in interior decoration is increasing year by year. Due to the flammability and flammability of wood materials and some paints, there must be fire hazards. In recent years, due to the extensive use of decorative materials, such fires are on the rise. The preparation of new non-combustible, flame-retardant and low-toxic decorative materials has been highly valued by relevant state departments. [0003] Water-based polyurethane materials use water as a solvent, which has the advantages of no pollution, safety and reliability, excellent mechanical properties, good compatibility, and easy modification. It has excellent performance and has a promising future in coating applications, but polyure...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/08C09D5/18C09D7/12C08G18/10C08G18/12
Inventor 朱荧科李娟许亮丁文鹏顾群
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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