Solutions in organic solvents of copolymers of acrylic or methacrylic esters

Claim 2

A composition comprising a solution in an organic solvent having a boiling temperature of from 55* to 165* C. of from 15 to 30 percent by weight (with reference to the solution) of a solution copolymer of A. from 60 to 97 percent by weight of at least one ester selected from the group consisting of acrylic esters and methacrylic esters of alkanols containing from four to 10 carbon atoms; B. from 0.15 to 3 percent by weight of (a) least one monoester of an Alpha , Beta -olefinically unsaturated monocarboxylic acid containing from three to five carbon atoms and a glycol selected from the group consisting of alkanediols containing from two to eight carbon atoms, cycloalkanediols containing from six to eight carbon atoms and monochloroalkanediols containing from three to six carbon atoms; and (b) at least one N-alkoxymethylamide of a carboxylic acid selected from the group consisting of Alpha , Beta -olefinically unsaturated moncarboxylic and dicarboxylic acids containing from three to five carbon atoms and containing from one to four carbon atoms in the alkoxy group, the amount of the monoester (a) being at least 0.1 percent by weight and the amount of the N-alkoxymethylamide (b) being at least 0.05 percent by weight; and C. from 0 to 39 percent by weight of at least one other monolefinically unsaturated monomer; said solution polymer having a glass temperature of from -60* C. to 0* C.

Claim 3

A composition as claimed in claim 2 wherein said solvent is selected from the group consisting of esters of acetic acid with alkanols containing from one to four carbon atoms, liquid aromatic hydrocarbons having boiling temperatures of from 78* to 160* C., liquid chloroparaffins having boiling temperatures of from 60* to 165* C., liquid aliphatic and cycloaliphatic ethers having from four to eight carbon atoms, and dimethylformamide.

Claim 4

A composition as claimed in claim 3 wherein said solvent is selected from the group consisting of esters of acetic acid with alkanols containing from one to four carbon atoms, liquid aromatic hydrocarbons having boiling temperatures of from 78* to 160 * C,. liquid chloroparaffins having boiling temperatures of from 60* to 165* C., liquid saturated aliphatic hydrocarbons having boiling temperatures of from 60* to 165* C., liquid aliphatic ketones having boiling temperatures of from 55* to 160* C., aliphatic and cycloaliphatic ethers having from four to Eight carbon atoms, and dimethylformamide.

Claim 5

A composition as claimed in claim 3 wherein said solvent is a mixture of from 50 to 80 percent by weight of gasoline having a boiling temperature of from 60* to 120* C. and from 20 to 150 percent by weight of acetone.

Claim 6

A composition as claimed in claim 3 wherein said solvent is a mixture of from 50 to 75 percent by weight of cyclohexane and 25 to 50 percent by weight of toluene.

Claim 7

A composition as claimed in claim 3 wherein said solvent is ethyl acetate.

Claim 8

A contact adhesive comprising a solution in an organic solvent having a boiling temperature of from 55* to 165* C. of I. from 15 to 30 percent by weight, with reference to the solution of a solution polymer of A. from 60 to 97 percent of at least one ester selected from the group consisting of acrylic and methacrylic esters of alkanols containing from four to ten carbon atoms, B. from 0.15 to 3 percent by weight of (a) at least one monoester of an Alpha Beta -olefinically unsaturated monocarboxylic acid containing from three to five carbon atoms and a glycol containing from two to eight carbon atoms and (b) at least one N-alkoxymethylamide of a corboxylic acid containing from three to five carbon atoms whose alkoxy group contains from one to four carbon atoms, the amount of the monoester (a) being at least 0.1 percent by weight and the amount of the N-alkoxymethylamide (b) being at least 0.05 percent by weight, and C. from 0 to 39 percent of at least one other monoolefinically unsaturated monomer, said solution polymer having a glass temperature of from -60* C. to 0* C.; and II. from 5 to 50 percent by weight, with reference to the solution polymer (I), of another polymer selected from the group consisting of polyisobutylenes, modified colophony resins in which colophony or hydrogenated colophony is esterified with a monohydric to tetrahydric alcohol of one to ten carbon atoms, and polycondensates of cyclohexanone or methylcyclohexanones.

Claim 9

A contact adhesive as claimed in claim 9 wherein said solvent is a mixture of from 50 to 80 percent by weight of gasoline having a boiling temperature of from 60* to 120* C. and from 20 to 150 percent by weight of acetone.

Claim 10

A contact adhesive as claimed in claim 9 wherein said solvent is a mixture of from 50 to 70 percent of cyclohexane and from 25 to 50 percent by weight of toluene.