A preparation method of flame-retardant water-based polyurethane for impregnation of microfiber base cloth

A water-based polyurethane and base fabric technology, used in textiles and papermaking, can solve the problems of easy migration of flame retardants and poor durability, achieve good toluene resistance synergy, improve poor compatibility, improve solidification rate and foam. The effect of porosity

Active Publication Date: 2021-12-31
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The flame-retardant water-based polyurethane is evenly distributed in the base fabric by impregnation, so that the entire base fabric has flame-retardant properties, and overcomes the shortcomings of externally added flame retardants such as easy migration and poor durability, thereby preparing excellent flame-retardant properties. Microfiber synthetic leather base cloth

Method used

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  • A preparation method of flame-retardant water-based polyurethane for impregnation of microfiber base cloth
  • A preparation method of flame-retardant water-based polyurethane for impregnation of microfiber base cloth
  • A preparation method of flame-retardant water-based polyurethane for impregnation of microfiber base cloth

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Preparation of flame retardant chain extender: Dissolve 21.6g of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) in ethanol, add 3.1g of formaldehyde dropwise, React at 70°C for 6 hours, wash, filter, and dry the resulting product; then dissolve 18.45g of cyanuric chloride in acetone, add 16.8g of sodium bicarbonate, and then add 24.6g of the product obtained in the previous step, at 20 ℃ for 4 hours, the obtained product was washed, filtered, and dried; the obtained product was added to acetonitrile together with 2-amino-2-methyl-1,3-propanediol, and 13.95 g of triethylamine was added, at 82 ℃ for 6 hours, and then the product was washed, filtered, and dried to obtain the desired flame retardant chain extender.

[0024] (2) Preparation of flame-retardant water-based polyurethane: After dehydrating and drying polybutylene adipate at 120°C under vacuum conditions, 60 parts of polyester polyol, 30 parts of diphenylmethane diisocyanate and 0.01 parts of Orga...

Embodiment 2

[0028] (1) Preparation of flame retardant chain extender: Dissolve 21.6g of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) in ethanol, add 3.1g of formaldehyde dropwise, React at 70°C for 6 hours, wash, filter, and dry the resulting product; then dissolve 18.45g of cyanuric chloride in acetone, add 16.8g of sodium bicarbonate, and then add 24.6g of the product obtained in the previous step, at 20 ℃ for 4 hours, the obtained product was washed, filtered, and dried; the obtained product was added to acetonitrile together with 2-amino-2-methyl-1,3-propanediol, and 13.95 g of triethylamine was added, at 82 ℃ for 6 hours, and then the product was washed, filtered, and dried to obtain the desired flame retardant chain extender.

[0029](2) Preparation of flame-retardant water-based polyurethane: After dehydrating and drying polycarbonate diol at 120°C under vacuum conditions, mix 80 parts of polyester polyol, 40 parts of toluene diisocyanate and 0.01 parts of organic bism...

Embodiment 3

[0033] (1) Preparation of flame retardant chain extender: Dissolve 21.6g of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) in ethanol, add 3.1g of formaldehyde dropwise, React at 70°C for 6 hours, wash, filter, and dry the resulting product; then dissolve 18.45g of cyanuric chloride in acetone, add 16.8g of sodium bicarbonate, and then add 24.6g of the product obtained in the previous step, at 20 ℃ for 4 hours, the obtained product was washed, filtered, and dried; the obtained product was added to acetonitrile together with 2-amino-2-methyl-1,3-propanediol, and 13.95 g of triethylamine was added, at 82 ℃ for 6 hours, and then the product was washed, filtered, and dried to obtain the desired flame retardant chain extender.

[0034] (2) Preparation of flame-retardant water-based polyurethane: After dehydrating and drying polyethylene adipate at 120°C under vacuum conditions, 100 parts of polyethylene adipate, 50 parts of diphenylmethane diisocyanate and 0.01 parts of...

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Abstract

The invention discloses a method for preparing flame-retardant water-based polyurethane for impregnating superfiber base cloth. It is characterized in that a reactive flame retardant chain extender is firstly synthesized, and then it is used as a flame retardant chain extender to prepare water-based polyurethane, which is used for impregnation of toluene-reduced microfiber base cloth to improve the flame retardant performance of the base cloth . The impregnated base is placed in the coagulation solution, and then the sea component in the sea-island fiber is removed through the toluene reduction process, and the superfiber synthetic leather with excellent flame retardancy can be obtained after sufficient washing, drying, coating and finishing. This method can effectively improve the disadvantages of poor compatibility and easy migration of the externally added flame retardant in the resin matrix. At the same time, the reactive flame retardant chain extender has little effect on the mechanical properties of polyurethane, and its comprehensive performance is better. Water-based polyurethane is used to replace traditional solvent-based polyurethane, which is ecological and environmentally friendly, and improves the market competitiveness of products. (Structural formula of reactive flame retardant chain extender).

Description

technical field [0001] The invention relates to the field of manufacturing high-performance synthetic leather, in particular to a method for preparing a superfiber leather base cloth with a flame-retardant function. Background technique [0002] Microfiber synthetic leather is a composite material developed based on dissolved island-in-the-sea superfine fibers, which are composed of superfine fibers and polyurethane. Microfibers are bundled, and their fineness and structure are similar to collagen fibers. The microfibers are three-dimensionally intertwined in the superfine fiber synthetic leather, which acts as a support for the skeleton; the polyurethane distributed around the fibers makes the entire synthetic leather base fabric form an organic whole, which not only has filling properties in the base fabric , And form a circular, fingerprint-shaped or honeycomb cell structure, these cell structures are interlaced and connected, so that the microfiber synthetic leather has...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/66C08G18/42C08G18/44C08G18/32C08G18/10D06N3/00D06N3/14
CPCC08G18/6633C08G18/4238C08G18/44C08G18/3889C08G18/10D06N3/146D06N3/147D06N3/0011D06N3/0004D06N2209/126D06N2209/067D06N2211/28
Inventor 范浩军高强陈意向均颜俊崔梦杰
Owner SICHUAN UNIV
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