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Moisture-curing polyurethane hot-melt resin composition and laminate

A resin composition, polyurethane prepolymer technology, applied in the direction of polyurea/polyurethane adhesives, synthetic resin layered products, chemical instruments and methods, etc., can solve the problems of low peel strength, poor washing resistance, etc., and achieve excellent The effect of moisture permeability, excellent texture, excellent peel strength

Active Publication Date: 2020-09-29
DIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, when a large amount of highly hydrophilic oxyethylene groups are included, there are problems of low peel strength and poor washing resistance

Method used

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  • Moisture-curing polyurethane hot-melt resin composition and laminate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0086] Add 47 parts by mass of polyethylene glycol (number-average molecular weight: 3,000, hereinafter abbreviated as "PEG3000"), aromatic polyester polyol ( Formed by reacting neopentyl glycol, diethylene glycol and phthalic anhydride, number average molecular weight: 1,000, hereinafter abbreviated as "aromatic PEs-1") 17.5 parts by mass, crystalline aliphatic polyester polyol (made of hexyl Formed by reacting diol with sebacic acid, number average molecular weight: 3,500, hereinafter abbreviated as "crystalline PEs-1") 17.5 parts by mass, polyoxypropylene triol ("T-700" manufactured by Mitsui Chemicals, Ltd., Number average molecular weight: 700, hereinafter abbreviated as "T-700") 1 part by mass and mixed, heated under reduced pressure at 100° C., and dehydrated until the water content in the flask became 0.05% by mass or less.

[0087] Next, the inside of the flask was cooled to 90°C, 22 parts by mass of 4,4'-diphenylmethane diisocyanate (hereinafter abbreviated as "MDI")...

Embodiment 2～3、 comparative example 1～6

[0089]A polyurethane prepolymer was obtained in the same manner as in Example 1, except that the type and amount of polyol and the amount of polyisocyanate were changed as shown in Table 1.

[0090] [How to make a laminate]

[0091] The polyurethane prepolymers obtained in Examples and Comparative Examples were melted at 120° C. for 1 hour, and then heated to 120° C. with a gravure roll of 40 lines / inch in the form of a grid, on a moisture-permeable polyurethane film (made by DIC Corporation). Solvent-based polyurethane resin composition "Crisvon S-525", polyurethane film produced with a film thickness of 12 μm) at 20 g / m 2 Apply intermittently in dots. Next, a 40-denier nylon taffeta was bonded to the coated surface as a base fabric, and left to stand under conditions of a temperature of 23° C. and a relative humidity of 65% for 3 hours to obtain a laminate.

[0092] [Evaluation method of moisture permeability]

[0093] The water vapor transmission rate of the obtained lam...

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Abstract

The present invention provides a moisture-curable hot-melt urethane resin composition characterized by comprising an isocyanate-group-containing urethane prepolymer that is a product of the reaction of (B) a polyisocyanate with (A) polyols which comprise (a1) a polyethylene glycol and / or a polyoxyethylene-polyoxypropylene glycol, (a2) an aromatic polyester polyol obtained using phthalic acid as a starting material, and (a3) a crystalline aliphatic polyester polyol and which have an oxyethylene structure content in the range of 5-18 mol / kg. The present invention further provides a laminate which includes (i) a cured object of the moisture-curable hot-melt urethane resin composition and (ii) base fabric. The problem to be solved by the present invention is to provide an adhesive which combines excellent moisture permeability with excellent peel strength and gives a laminate having excellent texture.

Description

technical field [0001] The present invention relates to a moisture-curable polyurethane hot-melt resin composition that can be used particularly as an adhesive when producing a moisture-permeable waterproof fabric and synthetic leather that require moisture permeability. Background technique [0002] Mountaineering clothing, sportswear, etc. are generally required to have excellent moisture permeability, water resistance, etc. in addition to ease of movement and lightness when worn. Among them, moisture permeability is an important characteristic from the viewpoint of suppressing the uncomfortable feeling caused by the stuffy heat caused by the stagnation of moisture generated in the body such as perspiration in the clothing. [0003] As a moisture-permeable waterproof fabric or the like having the above-mentioned moisture permeability, fabrics in which a base fabric and a moisture-permeable material are bonded together with an adhesive are generally used (for example, refer...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/12B32B5/24B32B27/40C08G18/40C09J175/06
CPCB32B5/24B32B27/40C08G18/12C08G18/40C09J175/06C08G18/4018C08G18/4202
Inventor 竹田伸吾藤原丰邦
Owner DIC CORP