Flame retardant adhering sheet

An adhesive sheet, flame retardant technology, applied in the direction of adhesives, adhesive types, polyurea/polyurethane adhesives, etc., can solve problems such as harmful human environment, and achieve excellent flame retardancy and adhesion.

Active Publication Date: 2013-06-05
LINTEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, halogen-based flame retardants have problems such as harmful to human body and environment due to the generation of halogen-containing gas during combustion.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0176] The weight average molecular weight (Mw) shown in the description of the following examples is the value calculated|required in standard polystyrene conversion by measuring using Tosoh Corporation "HLC-8020" under the following conditions.

[0177] (measurement conditions)

[0178] Column: "TSK gel GMHXL (×2)" "TSK gel G2000HXL" (both manufactured by Tosoh Corporation)

[0179] Column temperature: 40°C

[0180] Developing solvent: tetrahydrofuran

[0181] Flow rate: 1.0mL / min

[0182] Detector: Differential refractometer

manufacture example 1

[0184] (Preparation of Acrylic Copolymer Solution)

[0185] 90 parts by mass of butyl acrylate and 10 parts by mass of acrylic acid as monomer components, 200 parts by mass of ethyl acetate as a solvent, and 0.2 parts by mass of azobisisobutyronitrile as a polymerization initiator were added to the reactor and mixed. After degassing with nitrogen for 4 hours, gradually raising the temperature to 60° C., and stirring for 24 hours, polymerization reaction was carried out to obtain an ethyl acetate solution (solid content concentration: 33% by mass) containing an acrylic copolymer having a weight average molecular weight of 650,000.

manufacture example 2

[0187] (Preparation of polyurethane resin solution (B-1))

[0188] 100 parts by mass of polypropylene glycol (weight average molecular weight: 2000) as polyol b1, 10.1 parts by mass of hexamethylene diisocyanate (NCO group / OH group (molar ratio) = 1.2) as b2 polyvalent isocyanate compound, dibutyltin dilaurate 0.01 parts by mass were mixed as a catalyst, and the temperature was gradually raised to 85° C., followed by stirring for 2 hours to obtain a polyurethane prepolymer having an isocyanate terminal.

[0189] After adding 110 parts by mass of toluene to the obtained isocyanate-terminated polyurethane prepolymer and cooling to room temperature, 0.48 parts by mass of 1,4-butanediol (b4) and 0.12 parts by mass of trimethylolpropane (b5) were added dropwise As the chain extender b3, after slowly raising the temperature to 70° C., stirring was performed for 2 hours to obtain a toluene solution of a polyurethane resin having a weight average molecular weight of 140,000 (B-1; soli...

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Abstract

The invention provides a thin film type flame retardant adhering sheet which is an adhering sheet characterized in that at least one face of a substrate of the adhering sheet is provided with an adhesive layer, the adhering sheet has enough adhering strength even if in a thin film adhesive layer of which an adhesive contains a flame retardant agent, and the adhering sheet has excellent flame retardant property and adhering strength. The flame retardant sheet is a flame retardant adhering sheet characterized in that at least one face of a substrate of the flame retardant adhering sheet is provided with an adhesive layer, the substrate has flame retardant property which conforms with the VTM-0 in a test based on the UL94 standard, each face of the adhesive layer is more than 0.6 [mu]m in thickness, and the total thickness of the adhesive layer is less than 7.0 [mu]m. An adhesive which the adhesive layer consists of contains a acrylic acid series copolymer A, a polyurethane resin B, and a flame retardant C, wherein the content of the flame retardant C in the adhesive is 0.1 to 40 mass%; when the content of flame retardant C in the adhesive is Wc (mass%) and the total thickness of the adhesive layer is T([mu]m), the value of T/Wc is 0.07 to 0.45.

Description

technical field [0001] The present invention relates to a flame-retardant adhesive sheet. Specifically, it relates to a film-type flame-retardant adhesive sheet having excellent flame retardancy and adhesive force. Background technique [0002] Flame retardancy is required for members used in various fields related to electronic components, electronic equipment, aircraft, and nuclear power plants. Accordingly, high flame retardancy of the VTM-0 class under the UL94 standard is also required for an adhesive tape or an adhesive sheet for fixing these members. [0003] In addition, in recent years, miniaturization of products related to electronic components and electronic equipment is desired, and related to this, adhesive tapes or adhesive sheet films for joining members used in the products or temporary bonding during processing are also desired. change. [0004] In order to improve the flame retardancy of an adhesive tape or an adhesive sheet, a method of containing vari...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/02C09J133/00C09J175/04C09J11/00
Inventor 大畠健二稻男洋一川田智史
Owner LINTEC CORP
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