IPC분류정보
| 국가/구분 |
United States(US) Patent
등록
|
| 국제특허분류(IPC7판) |
|
| 출원번호 |
US-0514430
(1990-04-25)
|
| 우선권정보 |
JP-0109771 (1989-04-28); JP-0129576 (1989-05-22) |
|
발명자
/ 주소 |
- Suzuki Hideaki (Nara JPX) Hosoyama Kenji (Kobe JPX) Takeda Shuichiro (Kobe JPX) Kamikura Rinzo (Sakai JPX)
|
| 출원인 / 주소 |
- Kanzaki Paper Manufacturing Co., Ltd. (Tokyo JPX 03)
|
| 인용정보 |
피인용 횟수 :
39 인용 특허 :
0 |
초록
▼
Disclosed are an adhesive sheet comprising a release sheet base material, an undercoat layer formed on the release sheet base material, a release agent layer formed on the undercoat layer, an adhesive layer formed on the release agent layer and a surface sheet formed on the adhesive layer, the adhes
Disclosed are an adhesive sheet comprising a release sheet base material, an undercoat layer formed on the release sheet base material, a release agent layer formed on the undercoat layer, an adhesive layer formed on the release agent layer and a surface sheet formed on the adhesive layer, the adhesive sheet being characterized in that the undercoat layer comprises a water-dispersible acrylate or methacrylate copolymer resin having an emulsifier content of about 2 to about 10 wt. % based on the total amount of the monomers used for preparing the copolymer and which resin has a glass transition temperature of about -60°to about 20°C., and that the release sheet base material having the undercoat layer formed thereon, as a whole, has a bulk density of up to 1.0 g/cm3, and a process for preparing a release sheet comprising a release sheet base material, an undercoat layer and a relase agent layer.
대표청구항
▼
An adhesive sheet comprising a release sheet base material, an undercoat layer formed on said release sheet base material, a release agent layer formed on said undercoat layer, an adhesive layer formed on said release agent layer and a surface sheet formed on said adhesive layer, the adhesive sheet
An adhesive sheet comprising a release sheet base material, an undercoat layer formed on said release sheet base material, a release agent layer formed on said undercoat layer, an adhesive layer formed on said release agent layer and a surface sheet formed on said adhesive layer, the adhesive sheet being characterized in that said undercoat layer comprises a mixture of a first copolymer and a second copolymer, said first and second copolymers comprising acrylate or methacrylate copolymers, said first copolymer comprising a copolymer prepared by emulsion polymerization of a first monomer mixture in the presence of a first emulsifier having a molecular weight of about 1,000 to about 10,000, said first emulsifier being used in an about of 2 to 10 wt. % based on the total amount of said first monomer mixture, said first copolymer having a glass transition of -60 to 0°C., said first monomer mixture comprising (a) about 1 to about 20 wt. % of a first ethylenically unsaturated carboxyl-containing monomer, (b) about 40 to about 90 wt. % of a first C4-C18 alkyl ester monomer of acrylic or methacrylic acid and (c) 0 to about 40 wt. % of at least one first other monomer copolymerizable with said ethylenically unsaturated carboxyl containing monomer and said C4-C18 alkyl ester of acrylic or methacrylic acid, said second copolymer comprising a copolymer prepared by emulsion polymerization of a second monomer mixture in the presence of a second emulsifier having a molecular weight of about 1,000 to about 10,000, said second emulsifier being used in an amount of about 2 to about 10 wt. % based on the total amount of said second monomer mixture, and said second copolymer having a glass transition temperature of 45 to 100°C., said second monomer mixture comprising (d) about 1 to about 20 wt. % of a second ethylenically unsaturated carboxyl-containing monomer, (e) about 5 to about 40 wt. % of a second C4-C18 alkyl ester monomer of acrylic or methacrylic acid, and (f) about 50 to about 90 wt. % of at least one second other monomer copolymerizable with said second ethylenically unsaturated carboxyl-containing monomer and said second C4-C18 alkyl ester monomer of acrylic or methacrylic acid, said release sheet base material and said undercoat layer, as a whole, having a bulk density of up to 1.0 g/cm3.
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