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Moisture-curable polyurethane hot-melt adhesive, laminates made with the same, and moisture-permeable film

A moisture-curable, hot-melt adhesive technology, used in polyurea/polyurethane adhesives, adhesive types, adhesives, etc., to achieve excellent moisture permeability, excellent abnormal bond strength and water-resistant bond strength, Use high-value effects

Active Publication Date: 2009-09-30
DIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] However, the production method of the aforementioned thin film has been regarded as a problem in recent years in that a large amount of energy is required to volatilize the solvent.

Method used

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  • Moisture-curable polyurethane hot-melt adhesive, laminates made with the same, and moisture-permeable film
  • Moisture-curable polyurethane hot-melt adhesive, laminates made with the same, and moisture-permeable film
  • Moisture-curable polyurethane hot-melt adhesive, laminates made with the same, and moisture-permeable film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0132] Embodiment 1 "moisture curing type polyurethane hot melt adhesive A"

[0133] In a 1-liter 4-neck flask, add: polyester polyol (a-1 -1) 15 parts by mass; 14.4 parts by mass of neopentyl glycol, 34.5 parts by mass of 1,6-hexanediol and 51 parts by mass of adipic acid are obtained by reacting 20 parts by mass of crystalline polyester polyol (a-2-1) with a number average molecular weight of 2000 in 15 mass % of methyl-1,3-propylene; and polyethylene glycol ( a-3-1) 65 parts by mass. It heated under reduced pressure at 120 degreeC, and dehydrated until the water content in the flask became 0.05 mass %.

[0134] Next, the temperature in the aforementioned flask was cooled to 70°C, and then 18 parts by mass of 4,4'-diphenylmethane diisocyanate was added, and reacted at 90°C for 3 hours until the NCO content became constant, thereby obtaining a moisture-curable polyurethane Hot melt adhesive A. The viscosity of the adhesive A at 125°C was measured with a cone-plate viscome...

Embodiment 2～7 and comparative example 1～9

[0141] Except that the compositions of the polyol and polyisocyanate were changed to the following Tables 1 to 3, the moisture-curing polyurethane hot melt adhesives B to P, laminates B1 to P1, and moisture-permeable films B2 to P2.

[0142] [Evaluation methods for moisture permeability, normal state adhesive strength, water resistant adhesive strength, and hand feeling]

[0143] [Measurement method of moisture permeability of laminated body and moisture-permeable film]

[0144] Measurement was performed based on JIS L1099 (A-1: calcium chloride method).

[0145] A laminate and a moisture-permeable film having a moisture permeability of approximately 6,000 or more can be said to have practically sufficient moisture permeability.

[0146] [Measuring method of normal adhesive strength]

[0147] On the surface of the moisture-permeable polyurethane film 1 constituting each laminate, a 1-inch-wide hot-melt fabric tape (manufactured by Sun Chemical Co., Ltd.) was attached at 130...

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Abstract

A moisture-curable polyurethane hot-melt adhesive containing a urethane prepolymer obtained by reacting a polyol (A) which comprises a polyester polyol (a-1) obtained by reacting a polyol prepared by the addition of bisphenol A with an alkylene oxide with both an aliphatic polycarboxylic acid and an aromatic polycarboxylic acid, a crystalline polyester polyol (a-2), and a polyoxyethylene glycol (a-3) having a number-average molecular weight of 2000 to 25000 with a polyisocyanate (B); and a moisture-permeable film, which are suitable for the production of sport wear, raincoats, shoes, fireman uniforms, military uniforms, and so on.

Description

technical field [0001] The present invention relates to a moisture-curable polyurethane hot-melt adhesive, a laminate, and a moisture-permeable film that can be used in various applications such as the production of moisture-permeable waterproof clothing such as sportswear. Background technique [0002] Sportswear such as mountaineering clothing generally requires excellent moisture permeability in addition to flexibility and lightness when worn. Moisture permeability is an important characteristic in that, for example, it is possible to suppress discomfort caused by evaporation due to retention of moisture generated from the body such as perspiration in clothing. [0003] As clothing excellent in the aforementioned moisture permeability, there is known, for example, a heat-retaining and moisture-permeable waterproof cloth that uses a reactive hot-melt adhesive of a moisture-curable urethane resin to reflect moisture-permeable urethane resin containing water-expandable ureth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/04B32B5/24B32B27/00B32B27/40C08G18/42
CPCC08G18/7671C08G18/7642C08G18/4255C08G18/4238C08G2250/00C08G18/4018C08G2170/90C08G18/4833C08G2170/20C08G18/4202C09J175/04Y10S526/935Y10T428/24826Y10T428/24843Y10T428/31551Y10T428/31554B32B7/12B32B27/12B32B27/322B32B27/40C09J175/06
Inventor 金川善典鹰嘴实
Owner DIC CORP
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