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Moisture-permeable film, process for producing the same, and layered product including the same

A film and moisture-permeable technology, applied in other household appliances, chemical instruments and methods, applications, etc., can solve the problems of reduction, fluffing surface quality, poor peelability and other problems on the surface of the moisture-permeable film, and achieve a soft feel, excellent moisture permeability, excellent The effect of water resistance

Active Publication Date: 2010-06-16
DIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, the above-mentioned winding on the roll is often performed before the above-mentioned moisture-curable polyurethane hot-melt resin composition is completely cured. Therefore, when the winding is unwound, the above-mentioned moisture-curable polyurethane hot-melt resin composition When the release property of the moisture-permeable film formed by the material and the back surface of the release film in contact with it is poor, there is a problem that the surface of the moisture-permeable film will be fluffed and its surface quality will be lowered during peeling.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0146] Hereinafter, the present invention will be further specifically described through examples and comparative examples.

[0147] [Measurement method of number average molecular weight (Mn) of reactive polyurethane prepolymer]

[0148] The number average molecular weight (Mn) was calculated in terms of polystyrene by gel filtration chromatography (GPC) measurement.

[0149] [Measurement method of melt viscosity of reactive polyurethane prepolymer]

[0150] The melt viscosity (mPa·s) of the reactive polyurethane prepolymer was measured using a cone-plate viscometer (manufactured by ICI Corporation, measurement temperature: 125° C.).

[0151] [Measuring method of glass transition temperature (Tg) of reactive polyurethane prepolymer]

[0152] The glass transition temperature (Tg) of the reactive polyurethane prepolymer is: the reactive polyurethane prepolymer is coated to a thickness of 30 μm, aged for 5 days at an ambient temperature of 23°C and a relative humidity of 65%, ...

Synthetic example 1

[0153] [Manufacture of reactive polyurethane prepolymer (D'-1)]

[0154] In a 1-liter 4-necked flask, make 15 parts by mass of polyester polyol (a-1-1) of number average molecular weight 2000, 20 parts by mass of polyester polyol (a-2) of number average molecular weight 2000 at normal temperature solid. -1) and 65 parts by mass of polyethylene glycol (a-3-1) with a number average molecular weight of 4000 are heated under reduced pressure at 120°C and mixed to dehydrate until the moisture content becomes 0.05% by mass. Alcohol (a-1-1) is obtained by reacting polyether polyol obtained by adding 6 moles of propylene oxide to bisphenol A with sebacic acid and isophthalic acid, polyester polyol (a- 2-1) Obtained by reacting neopentyl glycol with 1,6-hexanediol and adipic acid.

[0155] Then, 18 parts by mass of 4,4'-diphenylmethane diisocyanate was added to the aforementioned mixture cooled to 70°C, and reacted at 90°C for 3 hours until the content of isocyanate groups was consta...

Synthetic example 2

[0156] Production of reactive polyurethane prepolymer (D-1)

[0157] In 100 parts by mass of the aforementioned reactive polyurethane prepolymer (D'-1) heated to 110°C, add 1.02 parts by mass of 2-hydroxyethyl acrylate and 0.01 part by mass of tin octoate to react to obtain a reactive polyurethane prepolymer Polymer (D-1). The ratio ([HEA / NCO]×100) of the number of isocyanate groups reacted from the hydroxyl group of 2-hydroxyethyl acrylate to the total amount of isocyanate groups contained in the reactive polyurethane prepolymer (D-1) is 15% .

[0158] In addition, ([HEA / NCO]×100) of the aforementioned reactive polyurethane prepolymer (D-1) was obtained based on the following method: adding excess dibutylamine to the reactive polyurethane prepolymer (D-1) , the remaining isocyanate group in the reactive polyurethane prepolymer (D-1) reacts with dibutylamine, and then, the amount of remaining dibutylamine is obtained by back titration using hydrochloric acid, thereby obtain...

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PUM

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Abstract

Provided is a moisture-permeable film having excellent moisture permeability and flexibility which render the film usable in producing a textile product. The film is less apt to cause fluffing and the resultant decrease in surface quality. The moisture-permeable film is one obtained by curing a reactive polyurethane hot-melt resin composition comprising: a reactive urethane prepolymer (D) obtained by reacting a hydroxylated (meth)acrylate (C) with 10-90% by number of the isocyanate groups of a urethane prepolymer obtained by reacting a polyisocyanate (B) with polyols (A) comprising a polyester polyol (a-1) obtained by reacting a polycarboxylic acid with a polyol which is an adduct of bisphenol A with an alkylene oxide, a polyester polyol (a-2) which is solid at ordinary temperature, and a polyoxyethylene glycol (a-3) having a number-average molecular weight of 1,000-25,000; a (meth)acrylate (E); and a photopolymerization initiator (F).

Description

technical field [0001] The present invention relates to a film that can be used in the manufacture of moisture-permeable waterproof clothing such as sportswear, and can be used in films for adhesive plasters, films for disposable diapers, and humidity-controlling building material films for wall materials and roofs, etc. moisture-permeable film. Background technique [0002] Sportswear such as mountaineering clothing is generally required to have excellent moisture permeability, water resistance, etc. in addition to ease of handling and light weight when worn. Among them, moisture permeability is an important characteristic for suppressing discomfort caused by stuffy heat caused by moisture generated from the body due to perspiration or the like staying in clothing. [0003] It is known that the moisture permeability of the aforementioned clothes can be improved by using a moisture-permeable film as a material for making the clothes. As said moisture-permeable film, the po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18B32B27/12C08G18/10C08G18/67C08F290/06
CPCC08J2375/16C08F290/067C08G18/4238C08G18/672C08G18/4252C08J5/18C08F290/06B32B7/12C08G18/4018C08G18/4833C09J175/16C08G2170/20B32B5/022B32B5/024B32B5/026B32B7/06B32B7/14B32B27/08B32B27/10B32B27/12B32B27/18B32B27/20B32B27/22B32B27/285B32B27/304B32B27/308B32B27/32B32B27/322B32B27/40B32B2307/50B32B2307/546B32B2307/724B32B2307/7265B32B2307/748B32B2419/00B32B2419/06B32B2437/00B32B2535/00B32B2555/02B32B2607/02Y10T428/249985C08G18/40
Inventor 金川善典鹰嘴实
Owner DIC CORP
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