Patent ID: 11919990
Assignee: HENKEL AG & CO. KGAA
Field: Pharmaceuticals (Chemistry)
Classification: CPC C  A | IPC A  C

Claim 1:
2. A one-pot process of making a single-phase silicone-acrylic hybrid composition comprising the steps of:
(a) making an acrylic polymer solution by polymerizing:
(i) a mixture of monomers, wherein at least one monomer comprises a hydrolyzable silane (meth)acrylic monomer and/or a siloxane (meth)acrylic macromer,
(ii) a free radical initiator,
(iii) an organic solvent,

wherein the reaction temperature is from about 50 to about 150° C., and reaction time is from about 2 to 24 hr;
(b) adding (i) a silicone polymer, and (ii) a catalyst into the acrylic polymer solution (a) and reacting at a reaction temperature of about 50 to about 150° C. for about 2 to 24 hours to form a silicone-acrylic hybrid solution;
(c) neutralizing the silicone-acrylic hybrid solution at a temperature of about room temperature to about 150° C. for about 2 to 24 hours; and
(d) filtering any solid precipitates from the silicone-acrylic hybrid solution to form a single-phase silicone acrylic hybrid composition in solution;
wherein the ratio of the silicone polymer and the acrylic polymer is from 50:1 to 1:50,
wherein the silicon-acrylic hybrid composition comprises —Si—O—Si— covalent bond linkages between the silicone polymer and the acrylic polymer;
wherein the one-pot process is conducted in a single reaction setting; and
wherein the silicon-acrylic hybrid composition remains as a single-phase for over six months.