Radiation-curable silicone elastomers and pressure sensitive adhesives

A composition which is curable to an elastomer comprising:

• (a) a polymer or mixture of polymers of the formula ##STR32## wherein X are monovalent moieties having ethylenic unsaturation which can be the same or different;
• Y are divalent linking groups which can be the same or different;
• m is an integer of 0 to 1;
• D are monovalent moieties which can be the same or different selected from the group consisting of hydrogen, an alkyl group of 1 to about 10 carbon atoms, aryl, and substituted aryl;
• R are divalent hydrocarbon groups which can be the same or different;
• R.sup.1 are monovalent moieties which can be the same or different selected from the group consisting of alkyl, substituted alkyl, aryl, and substituted aryl;
• R.sup.2 are monovalent moieties which can be the same or different selected from the group consisting of alkyl, substituted alkyl, aryl, and substituted aryl;
• R.sup.3 are monovalent moieties which can be the same or different selected from the group consisting of alkyl, substituted alkyl, vinyl, aryl, and substituted aryl;
• and
• R.sup.4 are monovalent moieties which can be the same or different selected from the group consisting of alkyl, substituted alkyl, vinyl, aryl, and substituted aryl;
• and
• n is an integer of about 300 to about 700;
• (b) a polymer or mixture of polymers of the formula ##STR33## wherein:
• p is an integer of about 35 to about 270;
• and
• X, Y, m, D, R, R.sup.1, R.sup.2, R.sup.3, and R.sup.4 are as defined above, including sufficient polar solvent to compatibilize the polymers;
• and
• (c) a silicone macromonomer or mixture of silicone macromonomers of the formula ##STR34## wherein:
• q is an integer of 0 to 1;
• s is an integer of 1 to 3;
• r is an integer of about 35 to about 700;
• R.sup.7 are monovalent moieties which can be the same or different selected from the group consisting of alkyl, substituted alkyl, alkoxy, alkyl amino, hydroxyl, aryl, and substituted aryl;
• and
• X, Y, m, D, R, R.sup.2, R.sup.3, and R.sup.4 are as defined above.

A method of preparing a silicone macromonomer of the formula ##STR38## wherein:

• q ia an integer of 0 to 1;
• s is an integer of 1 to 3;
• r is an integer of about 35 to about 700;
• R.sup.7 are monovalent moieties which can be the same or different selected from the group consisting of alkyl, substituted alkyl, alkoxy, alkyl amino, hydroxyl, aryl, and substituted aryl;
• X is a monovalent moiety having ethylenic unsaturation;
• Y is a divalent linking group;
• m is an integer of 0 or 1;
• D is a monovalent moiety selected from the group consisting of hydrogen, an alkyl group of 1 to about 10 carbon atoms, aryl, and substituted aryl;
• R is a divalent hydrocarbon group;
• R.sup.2 are monovalent moieties which can be the same or different selected from the group consisting of alkyl, substituted alkyl, aryl, and substituted aryl;
• R.sup.3 are monovalent moieties which can be the same or different selected from the group consisting of alkyl, substituted alkyl, vinyl, aryl, and substituted aryl;
• and
• R.sup.4 are monovalent moieties which can be the same or different selected from the group consisting of alkyl, substituted alkyl, vinyl, aryl, and substituted aryl;
• which comprises the step of:
• reacting a fluorosilane terminating agent represented by the formula ##STR39## wherein:
• X, Y, m, D, q, R, R.sup.2 and s are as defined above, with a solution of living polymeric siloxanolate in a suitable non-hydroxylic solvent in order to form said silicone macromonomer.