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Aqueous dispersion of blocked polyisocyanate, fiber treatment agent composition and fabric

A technology of polyisocyanate and diisocyanate, applied in the field of water dispersion of blocked polyisocyanate, can solve problems such as water repellency reduction, and achieve the effects of excellent mechanical stability, good water dispersion stability and high coating film strength

Active Publication Date: 2016-05-18
ASAHI KASEI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, fluororesins having a perfluoroalkyl group having 6 or less carbon atoms may lower performance such as water repellency after repeated washing compared to fluororesins having a carbon number of 8 or more, and it is urgently desired to maintain the performance

Method used

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  • Aqueous dispersion of blocked polyisocyanate, fiber treatment agent composition and fabric
  • Aqueous dispersion of blocked polyisocyanate, fiber treatment agent composition and fabric

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0149] Although the present invention will be specifically described with reference to the following examples and the like, the present invention is not limited thereto.

[0150] (1) Viscosity determination:

[0151] The viscosity was measured using the following device.

[0152] Device: RE-80R (manufactured by Toki Sangyo Co., Ltd.)

[0153] Rotor: cone plate 1°34'×R24

[0154] Measuring temperature: 25°C

[0155] (2) Determination of number average molecular weight:

[0156] The number average molecular weight is a polystyrene standard number average molecular weight measured by gel permeation chromatography using the following apparatus.

[0157] Device: HLC-802A (manufactured by Tosoh Corporation)

[0158] Column: G1000HXL×1 (manufactured by Tosoh Corporation)

[0159] G2000HXL×1 (manufactured by Tosoh Corporation)

[0160] G3000HXL×1 (manufactured by Tosoh Corporation)

[0161] Carrier gas: tetrahydrofuran

[0162] Flow rate: 0.6mL / min

[0163] Sample concentrat...

manufacture example 1

[0221] (Production example 1: Production of polyisocyanate)

[0222] A 4-neck flask equipped with a stirrer, a thermometer, a reflux condenser, and a nitrogen blowing pipe was made into a nitrogen atmosphere, and 1000 parts by mass of HDI and 22 parts by mass of trimethylolpropane (molecular weight: 134) as a trihydric alcohol were added, and stirred The temperature in the reactor was maintained at 90° C. for 1 hour to perform urethanization. Thereafter, the temperature of the reaction solution was kept at 60° C., an isocyanuration catalyst tetramethylammonium caprylate was added, and when the conversion rate reached 48%, phosphoric acid was added to stop the reaction. Thereafter, after filtering the reaction liquid, unreacted HDI was removed by a thin film distillation apparatus.

[0223] The obtained polyisocyanate had a viscosity at 25° C. of 25,000 mPa·s, an isocyanate group content of 19.9% ​​by mass, a number average molecular weight of 1080, and an isocyanate average f...

manufacture example 2

[0224] (Production example 2: Production of polyisocyanate)

[0225] A nitrogen atmosphere was made in a 4-necked flask equipped with a stirrer, a thermometer, a reflux condenser, a nitrogen blowing pipe, and a dropping funnel, and 1000 parts by mass of HDI was put in, and the temperature in the reactor was kept at 70° C. under stirring. An isocyanurate catalyst tetramethylammonium octanoate was added, and when the yield reached 40%, phosphoric acid was added to stop the reaction. After filtering the reaction solution, unreacted HDI was removed using a thin film evaporator.

[0226] The viscosity of the obtained polyisocyanate at 25°C was 2700 mPa·s, the content of isocyanate was 21.7%, the number average molecular weight was 660, and the average number of functional groups of isocyanate was 3.4.

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Abstract

The purpose of the present invention is to provide: a blocked polyisocyanate water dispersion having favorable water dispersion stability, capable of achieving high coating strength, exhibiting excellent mechanical stability as a fluorine-doped fiber processing agent, and capable of producing a fabric having high washability; and a fiber processing agent composition containing the same. The blocked polyisocyanate water dispersion contains water and a blocked polyisocyanate at least having component units (1-3), and has an average dispersed particle diameter of the blocked polyisocyanate of phi=1-250nm. 1) A polyisocyanate unit having at least one type of diisocyanate monomer unit selected from a group consisting of aliphatic diisocyanate monomers and alicyclic diisocyanate monomers. 2) A polyethylene oxide unit having a hydroxyl group on one end. 3) A blocking agent unit.

Description

technical field [0001] The present invention relates to an aqueous dispersion of blocked polyisocyanate, a fiber treatment composition containing the same, and a fabric treated with the fiber treatment composition. Background technique [0002] Fiber treatment agents are used to impart various functions to fibers. Examples of its functions include: water and oil repellency for preventing adhesion of water and oil; texture for making clothes comfortable to wear; and prevention of deformation of sewn products. [0003] Among these, a composition containing a fluororesin having a perfluoroalkyl group having 8 or more carbon atoms was used as a fiber treatment agent for imparting water repellency. However, it has been pointed out that fluororesins having a perfluoroalkyl group having 8 or more carbon atoms may decompose and produce perfluorooctanoic acid, which is concerned about its accumulation and harmfulness, when discharged into the environment. Therefore, it is being act...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/80C08L75/04D06M15/564C09D5/02C09D7/12C09D175/04
CPCC08G18/706C08G18/022C08G18/1875C08G18/283C08G18/285C08G18/792C08G18/8025C09D175/04D06M15/277D06M15/568D06M15/572D06M15/576D06M2200/12
Inventor 三轮祐一朝比奈芳幸
Owner ASAHI KASEI KK
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