Release agent for reactive hot melt resin

A reactive, stripping agent technology, applied in the direction of adhesives, adhesive types, heat-activated films/sheets, etc., can solve the problems of substrates that cannot be reworked and peeled off, and achieve excellent reworkability

Active Publication Date: 2020-02-07
DIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, on the contrary, since it cannot be peeled off, there is a problem that the substrate cannot be reworked

Method used

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  • Release agent for reactive hot melt resin
  • Release agent for reactive hot melt resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0048] Hereinafter, the present invention will be described in more detail using examples.

Synthetic example 1

[0050]

[0051] In a four-necked flask equipped with a thermometer, a stirrer, an inert gas inlet, and a reflux cooler, add 15 parts by mass of polypropylene glycol (number average molecular weight: 1000), 15 parts by mass of polypropylene glycol (number average molecular weight: 2000), 10 parts by mass of crystalline polyester polyol (made by reacting 1,6-hexanediol with adipic acid, number average molecular weight: 2000), 10 parts by mass of crystalline polyester polyol (made by making 1,6- Hexylene glycol reacted with 1,12-dodecanedicarboxylic acid, number average molecular weight: 3500), 15 parts by mass of amorphous polyester polyol (6 moles of propylene oxide adduct of bisphenol A , sebacic acid and isophthalic acid, the number average molecular weight: 2000), 2.5 parts by mass of acrylic polyol (making butyl acrylate / methyl methacrylate / ethyl acrylate / 2-hydroxyethyl methacrylate Ester = 69.65 / 25 / 5 / 0.35 (mass ratio), number average molecular weight: 13000, glass transi...

Embodiment 1

[0084] On the PET film / adhesive layer of the obtained laminate, apply a release agent of 100% by mass tetrahydrofurfuryl alcohol using a cotton swab, leave it for 5 minutes in a temperature environment of 23°C, peel off the straight tip with tweezers, and then fix it A peelability test was performed by measuring the peel strength (N) with a popular digital force gauge ("DS2-200N" manufactured by Imada Corporation). In addition, the peelability test of the laminated body before applying a release agent was also performed together.

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Abstract

The present invention provides a release agent for a reactive hot melt resin, the release agent being characterized in that in the Hansen solubility parameter, the dispersion component ([delta]D) falls within the range 14.0-21.0 MPa0.5, the dipole-dipole force component ([delta]P) falls within the range 0-10.5 MPa0.5, and the hydrogen bonding component ([delta]H) falls within the range 0-13.5 MPa0.5. This adhesive for a reactive hot melt resin is preferably one or more solvents selected from the group consisting of benzoic acid esters, tetrahydrofurfuryl alcohol and tetrahydrofurfuryl (meth)acrylate. This reactive hot melt resin preferably contains an isocyanate group-containing urethane prepolymer, and the content of urethane bonds in the urethane prepolymer preferably falls within the range 0.1-3 mol / kg.

Description

technical field [0001] The present invention relates to a release agent used for reactive hot-melt resin. Background technique [0002] Adhesives containing reactive hot-melt resins are solvent-free, and have been studied as environmentally friendly adhesives, focusing on fiber bonding and building material lamination, and are widely used in the industry. [0003] In addition, in recent years, in bonding of optical components, hot-melt adhesives have been studied in place of acrylic adhesives which have been the mainstream until now, due to the increasing demand for weight reduction and thinning of optical components. [0004] As the above-mentioned adhesive, for example, an adhesive using a heat-and-moisture-resistant hot-melt adhesive composition characterized by a flow initiation temperature of 55° C. with respect to 100 parts by weight of (a) is disclosed. Above 110°C polyurethane resin, blended with (b) 5 to 150 parts by weight of saturated polyester resin with a Tg of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J5/00C09D9/00C09K3/00
CPCC09D9/00C09K3/00C09J175/04C08G2170/20C08G18/7671C08G18/4018C08G18/4063C08G18/12C08G18/4202C08G18/4216C08G18/4238C08G18/4255C08G18/4808C08G18/4825C08K5/05C08K5/1525C08G18/307C09J5/00C09J2301/304C09J2301/312C09J7/35C09J7/401C08G18/0852C08G18/0857C08G18/4222C08G18/6254C09J2475/00
Inventor 齐藤公惠二宫淳藤原丰邦
Owner DIC CORP
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