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Method for preparing waterborne polyurethane coating with high heat resistance and flame retardance

A water-based polyurethane, high heat resistance technology, used in fire-resistant coatings and other directions, can solve the problems of unsatisfactory flame retardant effect, disappearance of mechanical properties, poor thermal stability, etc., to improve thermal stability and oxidation resistance, improve water resistance, The effect of improving flame retardancy

Inactive Publication Date: 2018-09-14
安徽大松树脂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the flame-retardant polyurethane currently sold in the market in my country has the defects of high cost and unsatisfactory flame-retardant effect. In addition, the thermal stability of polyurethane itself is poor, and its mechanical properties basically disappear in the environment of 80-90 ° C, and the temperature of 200 ° C Thermal degradation occurs immediately on the surface, thus limiting the application of polyurethane coatings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A kind of preparation method of the water-based polyurethane coating of high heat resistance flame retardant that the present invention proposes, comprises the following steps:

[0019] S1. Add 75 parts of 2-methyl-1,3-propanediol and 0.3 parts of boron trichloride ethyl ether to 400 parts of toluene, raise the temperature to 65°C, add 330 parts of epichlorohydrin dropwise, and stir the reaction after the dropwise addition 30min, then raise the temperature to 125°C, continue to stir and react for 2h, add dropwise an aqueous solution containing 28 parts of sodium hydroxide to the system after the reaction, stir for 30min, let stand to separate layers, remove the water layer, wash with deionized water until neutral , adding 160 parts of diethyl phosphate and 0.2 parts of triphenylphosphine to it, raising the temperature to 80°C for 2 hours, washing with water until neutral after the reaction, distilling off toluene, drying to obtain a flame-retardant polyether diol;

[00...

Embodiment 2

[0023] A kind of preparation method of the water-based polyurethane coating of high heat resistance flame retardant that the present invention proposes, comprises the following steps:

[0024] S1. Add 85 parts of 2-methyl-1,3-propanediol and 0.7 parts of boron trichloride ethyl ether to 500 parts of toluene, raise the temperature to 70°C, add 350 parts of epichlorohydrin dropwise, and stir the reaction after the dropwise addition 60min, then raise the temperature to 130°C, continue to stir and react for 3h, add dropwise an aqueous solution containing 33 parts of sodium hydroxide to the system after the reaction, stir for 40min, let stand to separate layers, remove the water layer, wash with deionized water until neutral , add 180 parts of diethyl phosphate and 0.5 parts of triphenylphosphine to it, raise the temperature to 85°C for 4 hours, wash with water until neutral after the reaction, distill off toluene, dry to obtain flame retardant polyether diol;

[0025] S2. Mix 10 p...

Embodiment 3

[0028] A kind of preparation method of the water-based polyurethane coating of high heat resistance flame retardant that the present invention proposes, comprises the following steps:

[0029]S1. Add 79 parts of 2-methyl-1,3-propanediol and 0.5 parts of boron trichloride ethyl ether to 450 parts of toluene, raise the temperature to 65°C, add 338 parts of epichlorohydrin dropwise, and stir the reaction after the dropwise addition 40min, then raised the temperature to 125°C, continued to stir and react for 2.5h, added dropwise an aqueous solution containing 30 parts of sodium hydroxide to the system after the reaction, stirred for 35min, stood to separate layers, removed the water layer, and washed with deionized water to medium Add 170 parts of diethyl phosphate and 0.4 parts of triphenylphosphine to it, raise the temperature to 80°C for 2.5 hours, wash with water until neutral after the reaction, distill off toluene, dry to obtain flame retardant polyether diol ;

[0030] S2....

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Abstract

The invention discloses a method for preparing waterborne polyurethane coating with high heat resistance and flame retardance, and relates to the technical field of polyurethane coating. The method includes carrying out reaction on 2-methyl-1, 3-propylene glycol, epichlorohydrin and diethyl phosphate to prepare flame-retardant polyether polyol; preparing waterborne polyurethane emulsion from the flame-retardant polyether polyol, polypropylene glycol 2000, isophoron diisocyanate, dihydromethyl propionic acid, 3, 3'-dichloro-4, 4'-methylene diphenylamine, aminoethyl hepta-polyphenyl POSS, composite fillers, chlorinated paraffin and the like. The 2-methyl-1, 3-propylene glycol is used as a raw material. The flame-retardant polyether polyol is used as a polyurethane synthesis raw material. Themethod has the advantages that the flame-retardant polyether polyol is synthesized, chlorine and phosphorus are successfully led into polyurethane molecular chains, and accordingly good flame-retardant effects can be realized; the glass transition temperatures of polyurethane materials can be increased by the aminoethyl hepta-polyphenyl POSS in components of the waterborne polyurethane coating, the heat stability and the oxidation resistance of the materials can be improved, the flame retardance of the waterborne polyurethane coating further can be improved, and the waterborne polyurethane coating prepared by the aid of the method is non-toxic and non-pollution and is excellent in flame retardance, water resistance, heat stability and weather resistance.

Description

technical field [0001] The invention relates to the technical field of polyurethane coatings, in particular to a preparation method of a water-based polyurethane coating with high heat resistance and flame retardancy. Background technique [0002] Polyurethane has good wear resistance, water resistance, solvent resistance and excellent mechanical properties. At present, it has been widely used in elastomers, foam plastics, coatings, adhesives and biomedical materials. Polyurethane coatings are usually used in leather finishing, textile printing and dyeing, papermaking, architectural coatings, adhesives, cast steel coatings and other fields. In these fields, almost all flammable materials are involved. If these materials are used without flame retardant Disposal will inevitably become a fire hazard. The flame retardancy of polyurethane coatings is one of the important directions of polyurethane functionalization. However, the flame-retardant polyurethane currently sold in t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/08C09D5/18C08G18/75C08G18/48C08G18/32C08G18/34C08G18/12C08G65/335C08G65/26C08G65/337
CPCC09D175/08C08G18/12C08G18/4825C08G18/755C08G65/2609C08G65/335C08G65/3353C08G65/337C09D5/18C08G18/348C08G18/3814
Inventor 朱立芳
Owner 安徽大松树脂有限公司