Removable adhesive comprising acrylic microballs, acrylic copolymer and cross-linker
First Claim
1. A removable adhesive composition comprising:
- about 100 parts by weight of a copolymer (A) which is tacky at ordinary temperature, and comprises;
from about 90 to about 99.9% by weight of a nonfunctional vinyl monomer (a) which comprises an acrylate or methacrylate ester having an alkyl group having from 2 to 12 carbon atoms, andfrom about 0.1 to about 10% by weight of a functional vinyl monomer (b) having at least one of a carboxyl group, a hydroxyl group, an amino group and an epoxy group;
from about 20 to about 1,000 parts by weight of a copolymer (B) having a glass transition point of at most about 10°
C. and being in the form of microballs having a mean particle diameter of from about 0.5 to about 300 μ
m, and comprising;
from about 90 to about 99.9% by weight of a nonfunctional vinyl monomer (a) which comprises an acrylate or methacrylate ester having an alkyl group having from 2 to 12 carbon atoms, andfrom about 0.1 to about 10% by weight of an α
-monoolefinic carboxylic acid (c); and
from about 0.01 to about 5 parts by weight of a polyfunctional cross-linking agent (C) which is capable of reacting with the functional groups of said components (b) and (c), wherein the surfaces of said copolymer (B) are substantially covered by said copolymer (A), and wherein the adhesive composition may be readily adhered to an adherend with a slight pressure and removed therefrom without damaging the surface of the adherend or leaving adhesive on the surface of the adherend.
0 Assignments
0 Petitions
Accused Products
Abstract
A removable adhesive composition comprising (i) 100 parts by weight of a copolymer (A) which is tacky at ordinary temperature, synthesized of 90 to 99.9% by weight of a nonfunctional vinyl type monomer (a) mainly composed of an acrylate or methacrylate ester having an alkyl group having 2 to 12 carbon atoms and 0.1 to 10% by weight of a functional vinyl type monomer (b) having one or more of a carboxyl group, a hydroxyl group, an amino group or an epoxy group in its molecule; (ii) 20 to 1,000 parts by weight of a copolymer (B) whose glass transition point is 10° C. or less and also having a mean particle diameter of 0.5 to 300 μm, synthesized of 90 to 99.9% by weight of a nonfunctional vinyl type monomer (a) mainly composed of acrylate or methacrylate ester having an alkyl group having 2 to 12 carbon atoms and 0.1 to 10% by weight of an α-monoolefinic carboxylic acid (c); and (iii) 0.01 to 5 parts by weight of a polyfunctional cross-linking agent (C) which is capable of reacting with the functional groups of said components (b) and (c), and the surfaces of said copolymer (B) being entirely covered with the copolymer (A).
The removable adhesive composition of this invention has excellent primary tack, adhesiveness and removability, and which, in particular, can be readily removed from an adherend without leaving any remanent adhesive composition on the adherend and also has excellent adhesiveness.
-
Citations
15 Claims
-
1. A removable adhesive composition comprising:
-
about 100 parts by weight of a copolymer (A) which is tacky at ordinary temperature, and comprises; from about 90 to about 99.9% by weight of a nonfunctional vinyl monomer (a) which comprises an acrylate or methacrylate ester having an alkyl group having from 2 to 12 carbon atoms, and from about 0.1 to about 10% by weight of a functional vinyl monomer (b) having at least one of a carboxyl group, a hydroxyl group, an amino group and an epoxy group; from about 20 to about 1,000 parts by weight of a copolymer (B) having a glass transition point of at most about 10°
C. and being in the form of microballs having a mean particle diameter of from about 0.5 to about 300 μ
m, and comprising;from about 90 to about 99.9% by weight of a nonfunctional vinyl monomer (a) which comprises an acrylate or methacrylate ester having an alkyl group having from 2 to 12 carbon atoms, and from about 0.1 to about 10% by weight of an α
-monoolefinic carboxylic acid (c); and
from about 0.01 to about 5 parts by weight of a polyfunctional cross-linking agent (C) which is capable of reacting with the functional groups of said components (b) and (c), wherein the surfaces of said copolymer (B) are substantially covered by said copolymer (A), and wherein the adhesive composition may be readily adhered to an adherend with a slight pressure and removed therefrom without damaging the surface of the adherend or leaving adhesive on the surface of the adherend. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
-
14. A removable adhesive composition consisting essentially of:
-
about 100 parts by weight of a copolymer (A) which is tacky at ordinary temperature, consisting essentially of; from about 90 to about 99.9% by weight of a nonfunctional vinyl monomer (a) which consists essentially of an acrylate or methacrylate ester having an alkyl group having from 2 to 12 carbon atoms, and from about 0.1 to about 10% by weight of a functional vinyl monomer (b) having at least one of carboxyl group, a hydroxyl group, an amino group and an epoxy group; from about 20 to about 1,000 parts by weight of a copolymer (B) having a glass transition point of at most about 10°
C. and having a mean particle diameter of from about 0.5 to about 300 μ
m, and comprising essentially of;from about 90 to about 99.9% by weight of a nonfunctional vinyl monomer (a) which consists essentially of an acrylate or methacrylate ester having an alkyl group having from 2 to 12 carbon atoms, and from about 0.1 to about 10% by weight of an α
-monoolefinic carboxylic acid (c); andfrom about 0.01 to about 5 parts by weight of a polyfunctional cross-linking agent (C) which is capable of reacting with the functional groups of said components (b) and (c), wherein the surfaces of said copolymer (A), and wherein the adhesive composition may be readily adhered to an adherend with a slight pressure and removed therefrom without damaging the surface of the adherend or leaving adhesive on the surface of the adherend.
-
-
15. A removable adhesive composition consisting essentially of:
-
about 100 parts by weight of a copolymer (A) which is tacky at ordinary temperature, consisting essentially of; from about 90 to about 99.9% by weight of a nonfunctional vinyl monomer (a) which consists essentially of an acrylate or methacrylate ester having an alkyl group having from 2 to 12 carbon atoms, and from about 0.1 to about 5% by weight of a functional vinyl monomer (b) having at least one of a carboxyl group, a hydroxyl group, an amino group and an epoxy group; from about 20 to about 500 parts by weight of a copolymer (B) having a glass transition point of at most about 10°
C. and being in the form of microballs having a mean particle diameter of from about 0.5 to about 300 μ
m, and consisting essentially of;from about 90 to about 99.9% by weight of a nonfunctional vinyl monomer (a) which consists essentially of an acrylate or methacrylate ester having an alkyl group having from 2 to 12 carbon atoms, and from about 0.5 to about 5% by weight of an α
-monoolefinic carboxylic acid (c); andfrom about 0.05 to about 3 parts by weight of a polyfunctional cross-linking agent (C) which is capable of reacting with the functional groups of said components (b) and (c), wherein the surfaces of said copolymer (B) are substantially covered by said copolymer (A), and wherein the adhesive composition may be readily adhered to an adherend with a slight pressure and removed therefrom without damaging the surface of the adherend or leaving adhesive on the surface of the adherend.
-
Specification