US 5,308,887 A · Pressure-sensitive adhesives

Abstract

The present invention provides a silicone/acrylic based pressure-sensitive adhesive composition, adhesive, and adhesive tapes prepared therefrom. The adhesive composition comprises: (a) from about 5 parts to about 95 parts by weight of acrylic monomer wherein the acrylic monomer comprises: (i) from about 50 to about 100 parts by weight of alkyl acrylate monomer, the alkyl groups of which have an average of 4 to 12 carbon atoms; and (ii) correspondingly from about 50 parts to about 0 parts by weight of a monoethylenically unsaturated copolymerizable modifier monomer; wherein the amounts of (i) and (ii) are selected such that the total amount of (i) plus (ii) equals 100 parts by weight of the acrylic monomer; (b) correspondingly from about 95 parts to about 5 parts by weight of silicone pressure-sensitive adhesive wherein the amounts of (a) and (b) are selected such that the total amount of (a) plus (b) equals 100 parts by weight; (c) about 0 part to about 5 parts by weight of a photoinitiator based upon 100 parts by weight of the acrylic monomer; and (d) about 0 to about 5 part by weight of a crosslinker based upon 100 parts by weight of (a) plus (b).

Claims29

Dependent claims

A radiation curable pressure-sensitive adhesive composition comprising:

(a) from about 5 parts to about 95 parts by weight of acrylic monomer wherein said acrylic monomer comprises:
(i) from about 50 to about 100 parts by weight of alkyl acrylate monomer, the alkyl groups of which have an average of 4 to 12 carbon atoms;
and
(ii) correspondingly from about 50 parts to about 0 parts by weight of a monoethylenically unsaturated copolymerizable modifier monomer;
wherein said amounts of (i) and (ii) are selected such that the total amount of (i) plus (ii) equals 100 parts by weight of said acrylic monomer;
(b) correspondingly from about 95 parts to about 5 parts by weight of silicon pressure-sensitive adhesive;
wherein the amounts of (a) and (b) are selected such that the total amount of (a) plus (b) equals 100 parts by weight;
(c) about 0 part to about 5 parts by weight of a photoinitiator based upon 100 parts by weight of said acrylic monomer;
and
(d) about 0 to about 5 parts by weight of a crosslinker based upon 100 parts by weight of (a) plus (b);
wherein the pressure-sensitive adhesive composition contains less than about 1 weight percent of a solvent based upon the total weight of the pressure-sensitive adhesive composition.

8 more elements

A pressure-sensitive adhesive comprising a radiation cured pressure-sensitive adhesive composition, wherein said pressure-sensitive adhesive composition comprises:

(a) from about 5 parts to about 95 parts by weight of acrylic monomer wherein said acrylic monomer comprises:
(i) from about 50 to about 100 parts by weight of alkyl acrylate monomer, the alkyl groups of which have an average of 4 to 12 carbon atoms;
and
(ii) correspondingly from about 50 parts to about 0 parts by weight of a monoethylenically unsaturated copolymerizable modifier monomer;
wherein said amounts of (i) and (ii) are selected such that the total amount of (i) plus (ii) equals 100 parts by weight of said acrylic monomer;
(b) correspondingly from about 95 parts to about 5 parts by weight of silicon pressure-sensitive adhesive wherein the amounts of (a) and (b) are selected such that the total amount of (a) plus (b) equals 100 parts by weight;
(c) about 0 part to about 5 parts by weight of a photoinitiator based upon 100 parts by weight of said acrylic monomer;
and
(d) about 0 to about 5 parts by weight of a crosslinker based upon 100 parts by weight of (a) plus (b);
wherein the pressure-sensitive adhesive composition contains less than about 1 weight percent of a solvent based upon the total weight of the pressure-sensitive adhesive composition.

7 more elements

A pressure-sensitive adhesive comprising a radiation cured pressure-sensitive composition, wherein said pressure-sensitive adhesive composition comprises:

(a) from about 25 parts to about 75 parts by weight of acrylic monomer wherein said acrylic monomer comprises:
(i) from about 50 to about 100 parts by weight of an alkyl acrylate monomer selected from the group consisting of isooctyl acrylate, 2-ethyl hexyl acrylate, butyl acrylate, and mixtures thereof;
and
(ii) correspondingly from about 50 parts to about 0 parts by weight of a monoethylenically unsaturated copolymerizable monomer selected from the group consisting of acrylic acid, acrylamide, isobornyl acrylate, N-vinyl-2-pyrrolidone, N-vinyl caprolactam, and mixtures thereof;
wherein said amounts of (i) and (ii) are selected such that the total amount of (i) plus (ii) equals 100 parts by weight of said acrylic monomer;
(b) correspondingly from about 75 parts to about 25 parts by weight of silicon pressure-sensitive adhesive wherein the amounts of (a) and (b) are selected such that the total amount of (a) plus (b) equals 100 parts by weight;
(c) about 0 part to about 5 parts by weight of a photoinitiator based upon 100 parts by weight of said acrylic monomer;
and
(d) about 0 to about 5 parts by weight of a crosslinker based upon 100 parts by weight of (a) plus (b);
wherein the pressure-sensitive adhesive composition contains less than about 1 weight percent of a solvent based upon the total weight of the pressure-sensitive adhesive composition.

7 more elements

Dependencies are inferred from the claim text.

Pressure-sensitive adhesives

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Pressure-sensitive adhesives

Life of this patent

Abstract

Claims29