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Polyurethane resin,water polyurethane resin,hydrophilic modifier,moisture resin and process for producing polyurethaneresin

A technology of polyurethane resin and water-based polyurethane, which is applied in the field of manufacturing polyurethane resin, water-based polyurethane resin, hydrophilic modifier, moisture-permeable resin and polyurethane resin. Endows problems such as hydrophilicity and poor compatibility, and achieves excellent compatibility, excellent water swelling, and moisture-permeable and water-repellent processing

Inactive Publication Date: 2005-03-09
MITSUI CHEMICALS POLYURETHANES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, the aqueous dispersion described in Japanese Unexamined Patent Publication No. 11-228808 has poor stability, and even if it is blended into a water-based resin, poor compatibility occurs, and a coating with uniform hydrophilicity cannot be obtained even if it is formed into a film. , as a result, virtually no hydrophilicity can be imparted
[0011] In addition, the moisture-permeable waterproof processing method described in Japanese Patent Publication No. 60-47954 uses a large amount of polar organic solvents, which is not desirable in terms of toxicity, air pollution, and energy efficiency.

Method used

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  • Polyurethane resin,water polyurethane resin,hydrophilic modifier,moisture resin and process for producing polyurethaneresin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0113] Preparation of polyurethane prepolymer

[0114] 8.3 parts by weight of 1,3-bis(isocyanatomethyl)cyclohexane (1,3-bis(isocyanatomethyl)cyclohexane) (trade name: タケネ-ト 600, Mitsui Takeda) are charged into the stirred reactor. Chemikar Corporation), 1.2 parts by weight ethylene glycol, 0.7 parts by weight dimethylolpropionic acid (trade name: Nichikama-PA, manufactured by Nippon Chemical Corporation), 2.5 parts by weight acetonitrile, and the reaction temperature is adjusted at 70 to 75 °C, react until the reaction rate is greater than or equal to 99%, and obtain a polyurethane prepolymer having anionic groups in the molecular side chains and free isocyanate groups in the molecular terminals. The carboxylic acid was 49 milliequivalents per 100 g of the polyurethane prepolymer.

[0115] Preparation of waterborne polyurethane resin

[0116] The polyurethane prepolymer obtained above was cooled to 30° C., 0.5 parts by weight of triethylamine was added, and the mixture was s...

Embodiment 2～5

[0118] According to the formula shown in Table 1, through the same operation as Example 1, waterborne polyurethane resin was obtained.

Synthetic example 1

[0150] Synthesis of Waterborne Resins

[0151]11.75 parts by weight of 4,4'-methylene bis(cyclohexyl isocyanate), 31.39 parts by weight of polyoxytetramethylene ethylene glycol with a molecular weight of 2000 (number average molecular weight) are charged into the stirred reactor. Diol (trade name: PTG2000SN, manufactured by Hodo Ke Valley Chemical Co.), 2.37 parts by weight dimethylol butyric acid (trade name: ニッカマ-BA, manufactured by Nippon Chemical Corporation) and 20.4 parts by weight acetone, the temperature of the reaction solution is adjusted at 53 ~55°C, as a reaction catalyst, add a small amount of stannous octoate (trade name: スタノクト, manufactured by Co., Ltd. API コ-ポレ-ション), and the reaction is carried out until the reaction rate is greater than or equal to 99%. Polyurethane prepolymers with free isocyanate groups at molecular ends.

[0152] This polyurethane prepolymer was cooled to 30° C., 1.46 parts by weight of triethylamine (carboxylic acid neutralization ratio: ...

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Abstract

The present invention provides a polyurethane resin, aqueous polyurethane resin, aqueous modifier, moisture permeating resin and a method for making the polyure thane resin. To provide an aqueous polyurethane resin which can endow excellent hydrophilicity to the aqueous resin because of excellent compatibility and water swellability in the formed film, or the aqueous polyurethane resin composed of polyurethane resin and the hydrophilic modifier comprising the aqueous polyurethane resin, a moisture permeating resin comprising the polyurethane resin, and a method for preparing the polyurethane resin, in the invention at least the polyurethane prepolymer comprising anionic group is reacted with the polyamine containing polyoxyethylene group to obtain polyurethane resin. The polyurethane resin is dispersed and / or dissolved into the water and the aqueous polyurethane resin is obtained, and the moisture permeating resin can be obtained by assorting the aqueous modifier composed of the aqueous polyurethane resin in the aqueous resin.

Description

technical field [0001] The present invention relates to polyurethane resins, water-based polyurethane resins, hydrophilic modifiers, moisture-permeable resins, and methods for producing the polyurethane resins. , moisture permeability, water retention, water swelling, antistatic properties, etc., modified polyurethane resin, or a water-based polyurethane resin composed of the polyurethane resin, and a hydrophilic modifier containing the water-based polyurethane resin , and a moisture-permeable resin containing these polyurethane resins, and a method for producing the polyurethane resin. Background technique [0002] So far, water-swellable polymers are also called water-absorbent polymers, which maintain high water retention by utilizing the hydrophilicity and cross-linked network of the polymer itself, and are used alone or in combination with other resins, where water permeability is required Or moisture permeability, water retention, water swelling, antistatic properties...

Claims

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Application Information

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IPC IPC(8): C08G18/10C08G18/20C08G18/48
Inventor 清水兵卫矶部雅博白木宽之平田文明
Owner MITSUI CHEMICALS POLYURETHANES INC
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