Pressure-sensitive adhesive sheet and pressure-sensitive adhesive composition
AssigneeNitto Denko Corporation
InventorsRyo Kanno, Kiyoe Shigetomi
Life of this patent
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Abstract
Provided is a pressure-sensitive adhesive composition including: an acrylic polymer (A) having a glass transition temperature lower than 0 C.°; and a polymer (B) containing, as monomer units, both a monomer (B1) having a polyorganosiloxane skeleton and a monomer (B2) whose homopolymer has a glass transition temperature of 40 C.° or higher. The acrylic polymer (A) contains, as a monomer unit, at least one monomer selected from the group consisting of N-vinyl cyclic amides represented by the following general formula (M1): wherein R1 is a divalent organic group.
Claims12
A pressure-sensitive adhesive composition comprising:
- an acrylic polymer (A) having a glass transition temperature lower than 0 C.°;
- and
- a polymer (B) containing, as monomer units, both a monomer (B1) having a polyorganosiloxane skeleton and a monomer (B2) whose homopolymer has a glass transition temperature of 40 C.° or higher;
- wherein the acrylic polymer (A) contains, as a monomer unit, at least one monomer selected from the group consisting of N-vinyl cyclic amides represented by the following general formula (M1):
- wherein R1 is a divalent organic group.
A pressure-sensitive adhesive sheet comprising a pressure-sensitive adhesive layer made of a pressure-sensitive adhesive composition, wherein
- the pressure-sensitive adhesive composition includes:
- an acrylic polymer (A) having a glass transition temperature lower than 0 C.°;
- and
- a polymer (B) containing, as monomer units, both a monomer (B1) having a polyorganosiloxane skeleton and a monomer (B2) whose homopolymer has a glass transition temperature of 40 C.° or higher;
- wherein the acrylic polymer (A) contains, as a monomer unit, at least one monomer selected from the group consisting of N-vinyl cyclic amides represented by the following general formula (M1).
- wherein R1 is a divalent organic group.
A pressure-sensitive adhesive composition comprising:
- an acrylic polymer (A) having a glass transition temperature lower than 0 C.°;
- and
- a polymer (B) containing, as monomer units, both a monomer (B1) having a polyorganosiloxane skeleton and a monomer (B2) whose homopolymer has a glass transition temperature of 40 C.° or higher;
- wherein the acrylic polymer (A) contains, as a monomer unit, at least one monomer selected from the group consisting of N-vinyl cyclic amides represented by the following general formula (M1):
- wherein R1 is a divalent organic group;
- wherein a content of the monomer selected from the group consisting of N-vinyl cyclic amides is 0.01% by mass to 40% by mass, based on the total monomer components of the polymer (A),
- the total monomer components of the polymer (B) comprise:
- 15% by mass or more but 30% by mass or less of the monomer (B1), and
- 10% by mass or more but 80% by mass or less of a (meth)acrylic monomer whose homopolymer has a glass transition temperature of 80 C.° or higher, as the monomer (B2),
- the monomer (B2) comprises both a (meth)acrylic monomer whose homopolymer has a glass transition temperature of 80 C.° or higher and a (meth)acrylic monomer whose homopolymer has a glass transition temperature of 40 C.° or higher but lower than 80 C.°.
Dependencies are inferred from the claim text.