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Blocked polyisocyanate water dispersion, fiber processing agent composition, and fabric

A polyisocyanate, fiber treatment agent technology, applied in fiber treatment, liquid repellent fibers, polyurea/polyurethane coatings, etc., can solve problems such as water repellency reduction, achieve excellent mechanical stability, high coating film strength, Good water dispersion stability

Active Publication Date: 2014-06-25
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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  • Blocked polyisocyanate water dispersion, fiber processing agent composition, and fabric
  • Blocked polyisocyanate water dispersion, fiber processing agent composition, and fabric

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

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

[0150] (1) Viscosity measurement:

[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℃

[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 concentration: 1.0% by mass

[0164] Injection ...

manufacture example 1

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

[0222] A 4-necked flask equipped with a stirrer, a thermometer, a reflux condenser, and a nitrogen blowing tube 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 triol were put into the flask. Next, the temperature in the reactor was maintained at 90°C for 1 hour to carry out urethanization. After that, the temperature of the reaction solution was maintained at 60° C., the isocyanuration catalyst tetramethylammonium caprylate was added, and phosphoric acid was added when the conversion rate reached 48% to stop the reaction. Then, after filtering the reaction liquid, the unreacted HDI was removed by a thin film distillation apparatus.

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

manufacture example 2

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

[0225] A 4-necked flask equipped with a stirrer, a thermometer, a reflux condenser, a nitrogen blowing tube, and a dropping funnel was made into a nitrogen atmosphere, 1000 parts by mass of HDI was put into it, and the temperature in the reactor was kept at 70°C under stirring. Add isocyanuration catalyst tetramethylammonium caprylate, add phosphoric acid when the yield reaches 40%, and stop the reaction. After filtering the reaction liquid, use a thin film evaporator to remove unreacted HDI.

[0226] The obtained polyisocyanate had a viscosity of 2700 mPa·s at 25°C, an isocyanate content of 21.7%, a number average molecular weight of 660, and an average number of isocyanate functional groups of 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 the following 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 a blocked polyisocyanate, a fiber treatment agent composition containing the same, and a fabric treated with the fiber treatment agent composition. Background technique [0002] In order to impart various functions to the fiber, a fiber treatment agent is used. Examples of its functions include: water and oil repellent for preventing the adhesion of water and oil; a texture that makes the feeling comfortable when wearing clothes; and prevention of deformation of sewing products. [0003] Among them, as a fiber treatment agent for imparting water repellency, a composition containing a fluororesin having a perfluoroalkyl group having a carbon number of 8 or more was used. However, it has been pointed out that fluororesins having perfluoroalkyl groups with a carbon number of 8 or more have the following possibility when they are discharged into the environment: they will decompose to produce perfluorooct...

Claims

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Application Information

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IPC IPC(8): C08G18/80C08L75/04D06M15/564C09D5/02C09D7/12C09D175/04
CPCC09D175/04D06M15/572D06M15/576C08G18/285C08G18/1875C08G18/706C08G18/283C08G18/8025D06M15/277D06M2200/12D06M15/568C08G18/792C08G18/022
Inventor 三轮祐一朝比奈芳幸
Owner ASAHI KASEI KK
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