Hydrophobic substrate which is able to release a chemical substance
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United States of America Patent
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-
Aug 11, 1981
Grant Date -
N/A
app pub date -
Aug 15, 1979
filing date -
Aug 25, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Hydrophobic substrate which can release at least one chemical substance, wherein it comprises a hydrophobic polymer matrix in which are homogeneously distributed inclusions of polymerized compounds of a different type to the said hydrophobic polymer and inclusions of the said substance, the polymerized compound inclusions forming in the said matrix a stable and continuous system in contact with the inclusions of the said substance. Process for the preparation of a hydrophobic substrate able to release a chemical substance, wherein it comprises forming inclusions of polymerized compounds in a hydrophobic polymer powder by grafting onto the latter a monomer of a different type to the said hydrophobic polymer, homogeneously mixing the grafted powder obtained in this way with a powder of the said substance and bringing the mixture into the form of a substrate by hot shaping it.
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