04908208 is referenced by 65 patents and cites 7 patents.

A matrix for delivery of active substances such as fragrances and pheromones into the atmosphere is provided which matrix is active substance permeable (including to hydrophilic substances) and is formed of a copolymer which can be softened sufficiently at temperature between 45.degree. C. and 160.degree. C. to incorporate the substances therein without damage caused by heat or chemical reactions, the matrix being formed of a substantially linear block copolymer which is a reaction product of a polydiorganosiloxane which forms soft segments in said reaction product and a diisocyanate which forms hard segments, said copolymer having a glass transition temperature between 45.degree. C. and 160.degree. C. said soft segments comprising from 70 to 99 percent by weight, based on the weight of said copolymer, the average molecular weight of the copolymer being between 15,000 and 500,000.

Title
Matrix for release of active ingredients
Application Number
7/184731
Publication Number
4908208
Application Date
April 22, 1988
Publication Date
March 13, 1990
Inventor
Gerald A Gornowicz
Midland
MI, US
Chi Long Lee
Midland
MI, US
Agent
Allan O Maki
Assignee
Dow Corning Corporation
MI, US
IPC
A01N 25/08
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