Silicone acrylate hybride composition and method of making same
AssigneeDow Corning Corporation
InventorsGary Loubert, Timothy P. Mitchell, Xavier Thomas
Life of this patent
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Abstract
A silicone acrylate hybrid composition includes the reaction product of a silicon-containing pressure sensitive adhesive composition, an ethylenically unsaturated monomer, and an initiator. The silicon-containing pressure sensitive adhesive composition includes acrylate or methacrylate functionality. A method of making the hybrid composition includes polymerizing the ethylenically unsaturated monomer and the silicon-containing pressure sensitive adhesive composition in the presence of the initiator.
Claims24
A silicone acrylate hybrid composition comprising the reaction product of:
- A. a silicon-containing pressure sensitive adhesive composition comprising acrylate or methacrylate functionality and the condensation reaction product of;
- a silicone resin,
- a silicone polymer, and
- a silicon-containing capping agent which provides said acrylate or methacrylate functionality, wherein said silicon-containing capping agent is of the general formula XYR′2SiZ wherein
- X is a monovalent radical of the general formula AE- where E is —O— or —NH— and A is an acryl group or a methacryl group,
- Y is a divalent alkylene radical having from 1 to 6 carbon atoms,
- R′ is a methyl or a phenyl radical, and
- Z is a monovalent hydrolyzable organic radical or a halogen;
- wherein the silicone resin and silicone polymer are reacted to form a pressure sensitive adhesive, wherein the silicon-containing capping agent is introduced prior to, during, or after the silicone resin and silicone polymer are reacted, and wherein:
- the silicon-containing capping agent reacts with the pressure sensitive adhesive after the silicone resin and silicone polymer have been condensation reacted to form the pressure sensitive adhesive;
- or
- the silicon-containing capping agent reacts in-situ with the silicone resin and silicone polymer;
- B. an ethylenically unsaturated monomer;
- and
- C. an initiator.
A silicone acrylate hybrid composition comprising the reaction product of:
- A. a silicon-containing pressure sensitive adhesive composition comprising acrylate or methacrylate functionality and the condensation reaction product of;
- a silicone resin,
- a silicone polymer, and
- a silicon-containing capping agent which provides said acrylate or methacrylate functionality;
- B. an ethylenically unsaturated monomer;
- and
- C. an initiator;
- blended with a non-hybrid pressure sensitive adhesive composition selected from the group of silicone pressure sensitive adhesive compositions, acrylic pressure sensitive adhesive compositions, polyurethane pressure sensitive adhesive compositions, natural rubber pressure sensitive adhesive compositions, synthetic rubber pressure sensitive adhesive compositions, and blends thereof.
A method of making a silicone acrylate hybrid composition comprising the steps of:
- providing a silicon-containing pressure sensitive adhesive composition comprising acrylate or methacrylate functionality by condensation reacting a silicone resin, a silicone polymer, and a silicon-containing capping agent which provides the acrylate or methacrylate functionality, wherein said silicon-containing capping agent is of the general formula XYR′2SiZ wherein
- X is a monovalent radical of the general formula AE- where E is —O— or —NH— and A is an acryl group or a methacryl group,
- Y is a divalent alkylene radical having from 1 to 6 carbon atoms,
- R′ is a methyl or a phenyl radical, and
- Z is a monovalent hydrolyzable organic radical or a halogen;
- wherein the silicone resin and silicone polymer are reacted to form a pressure sensitive adhesive, wherein the silicon-containing capping agent is introduced prior to, during, or after the silicone resin and silicone polymer are reacted, and wherein:
- the silicon-containing capping agent reacts with the pressure sensitive adhesive after the silicone resin and silicone polymer have been condensation reacted to form the pressure sensitive adhesive;
- or
- the silicon-containing capping agent reacts in-situ with the silicone resin and silicone polymer;
- and
- polymerizing an ethylenically unsaturated monomer and the silicon-containing pressure sensitive adhesive composition in the presence of an initiator.
A method of making a hybrid composition as set forth in 14 wherein the silicon-containing capping agent is reacted after the silicone resin and the silicone polymer have been condensation reacted.
A method of making a hybrid composition comprising the steps of:
- providing a silicon-containing pressure sensitive adhesive composition comprising acrylate or methacrylate functionality by condensation reacting a silicone resin, a silicone polymer, and a silicon-containing capping agent which provides the acrylate or methacrylate functionality;
- and
- polymerizing an ethylenically unsaturated monomer and the silicon-containing pressure sensitive adhesive composition in the presence of an initiator
- at a temperature of from 50 to 100° C.
A transdermal drug delivery system comprising:
- I. an active agent for controlled transdermal delivery to a substrate;
- and
- II. a silicone acrylate hybrid composition for maintaining contact with the substrate, said hybrid composition comprising the reaction product of:
- A. a silicon-containing pressure sensitive adhesive composition comprising acrylate or methacrylate functionality and the condensation reaction product of:
- a silicone resin,
- a silicone polymer, and
- a silicon-containing capping agent which provides said acrylate or methacrylate functionality;
- B. an ethylenically unsaturated monomer;
- and
- C. an initiator.
Dependencies are inferred from the claim text.