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Phosphorus-containing waterborne polyurethane resin transparent fireproof coating and preparation method

A technology of water-based polyurethane and fire-resistant coatings, which is applied in the direction of fire-resistant coatings, etc., which can solve the problems of lack of flame-retardant fire protection, decreased coating transparency, and inability to be used in places that require transparent coating, so as to improve flame-retardant protection and improve flame-retardant performance effect

Inactive Publication Date: 2015-04-22
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For waterborne polyurethane transparent coatings, the common method of adding a large amount of flame retardants will lead to a decrease in the transparency of the coating, which cannot be used in places requiring transparent finishing. Therefore, the flame retardant modification of transparent polyurethane coatings should start with the flame retardant of the resin. The element is introduced into the polymer chain to synthesize the intrinsic flame retardant polyurethane resin, which improves the flame retardant oxygen index of the material, so that it cannot play the role of flame retardant and fire prevention under fire conditions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0018] (1) The preparation steps of phosphorus-containing polyester polyol are:

[0019] Add adipic acid, 6-oxo-6H-dibenzo(c,e)(1,2)oxophosphorin-6-one in a container equipped with a stirrer, thermometer, condenser, and water separator -Succinic acid (DOPOMA), ethylene glycol, 1,2-propanediol, xylene, p-toluenesulfonic acid, heat up slowly; after all the solids are melted, start stirring, continue to slowly heat up to 140°C~150°C for 1 hour, then Continue to raise the temperature to 150-160°C for 1 hour, and finally raise the temperature, controlling the maximum temperature not to exceed 210°C until the acid value <10mgKOH / g to stop the reaction to obtain phosphorus-containing polyester polyol.

[0020] (3) The preparation steps of the phosphorus-containing waterborne polyurethane resin transparent fireproof coating are:

[0021] Transfer the formulated amount of phosphorus-containing polyester polyol into a container equipped with a stirrer, a condenser, and a thermometer, h...

Embodiment 1

[0029] Add 15.00g of adipic acid, 52.00g of DOPOMA, 15.00g of ethylene glycol, 6.50g of 1,2-propanediol, 10.00g of xylene, and 1.50g of p-toluenesulfonate in a container equipped with a stirrer, a thermometer, a condenser, and a water separator Acid, heat up slowly; after all the solids are melted, start stirring, continue to slowly heat up to 140°C~150°C for 1 hour, then continue to heat up to 150~160°C for 1 hour, and finally raise the temperature, control the maximum temperature not to exceed 210°C until the acid value Stop reaction when <10mgKOH / g, obtain phosphorus-containing polyester polyol.

Embodiment 2

[0031] Transfer 15.00g of phosphorus-containing polyester polyol into a container equipped with a stirrer, a condenser, and a thermometer, heat up to 45°C, slowly add 10.00g of TDI dropwise, stir for 30min and then raise the temperature to 65°C, at the same time, dropwise add React 0.30g of dibutyltin dilaurate for 2 hours; heat up to 70°C, add 2.30g of 2,2-dimethylolbutyric acid for hydrophilic chain extension reaction for 2 hours, and react until the content of isocyanate groups is stable within 30 minutes; cool down to At 35°C, add 2.40g of triethylamine and 70.00g of deionized water for high-speed stirring and emulsification to obtain a phosphorus-containing waterborne polyurethane resin transparent fireproof coating with a solid content of about 30%.

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Abstract

The invention relates to a preparation method of a phosphorus-containing waterborne polyurethane resin transparent fireproof coating. The phosphorus-containing waterborne polyurethane resin transparent fireproof coating comprises the following components in percentage by mass: 12-18% of phosphorus-containing polyester polyol, 8-12% of TDI, 0.24-0.36% of dibutyltin dilaurate, 1.68-2.52% of 2,2-bis(hydroxymethyl) butanoic acid, 1.68-2.52% of triethylamine and 70% of deionized water. The preparation method comprises the following steps of adding phosphorus-containing polyester polyol into a container equipped with a stirrer, a condenser and a thermometer and placing in a water-bath pot of 45 DEG C, slowly dropwise adding metered TDI with a constant-temperature funnel, stirring for 30 minutes, heating to 65 DEG C, simultaneously dropwise adding dibutyltin dilaurate and reacting for 2 hours; heating to 70 DEG C, adding a certain amount of 2,2-bis(hydroxymethyl) butanoic acid for performing hydrophilic chain-extending reaction for 2 hours until the content of the isocyanate group reaches a predetermined theoretical value; cooling to 35 DEG C, adding triethylamine and deionized water and carrying out high-speed stirring and emulsifying to obtain the waterborne polyurethane resin transparent fireproof coating.

Description

technical field [0001] The invention relates to a preparation method of a phosphorus-containing waterborne polyurethane resin transparent fireproof coating, and belongs to the technical field of polymer chemistry, polymer coatings and compositions thereof. Background technique [0002] Polyurethane resin has the characteristics of high strength, tear resistance and wear resistance. It is widely used in the fields of polymer materials such as plastics, rubber, fibers, coatings, and adhesives. Water-based polyurethane transparent coatings can play a good role in protecting wood coatings. It does not cover the natural texture of wood at the same time, because it does not contain organic solvents, which can reduce resource consumption and reduce the damage to operators and the environment during preparation and construction. However, after the film-forming substance is cured and formed, because the polyurethane resin is an organic polymer material, its limiting oxygen index is l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/06C09D5/18C08G18/66C08G18/46C08G18/32C08G18/34C08G63/692
CPCC09D175/06C08G18/3206C08G18/348C08G18/4684C08G18/664C08G18/6659C08G63/6926C08L2201/02C08L2201/10C09D5/18
Inventor 郭军红谢吉仁崔锦峰杨保平包雪梅周应萍郭永亮赵秋萍慕波李敏睿张鹏中王心远
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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