Polymeric compositions and methods of producing them

Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Biocides; animal or insect repellents or attractants

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424409, 424438, 424485, 424487, 424489, 424497, 424501, 424 946, 5147726, 42840224, 428407, 264 41, 25217412, 42721331, 42721336, A01N 2510, A61K 916

Patent

active

057441529

ABSTRACT:
Release of an active ingredient can be controlled and the active ingredient can be protected from the environment during storage, by distributing it throughout a matrix containing a relatively large amount of polymeric material that is soluble and swellable in aqueous alkali but less soluble and swellable at a lower pH value and which is in the form of a dried oil-in-water emulsion of the polymer or a relatively insoluble partial salt of the polymer with a volatile amine, the full salt of the polymer being relatively soluble. The composition is of particular value for the protection of detergent enzymes.

REFERENCES:
patent: 3492398 (1970-01-01), Marco et al.
patent: 3584113 (1971-06-01), Takebe et al.
patent: 3629392 (1971-12-01), Banker et al.
patent: 3691090 (1972-09-01), Kitajima et al.
patent: 4021364 (1977-05-01), Speiser et al.
patent: 4037040 (1977-07-01), Trapasso et al.
patent: 4411754 (1983-10-01), Kaetsu et al.
patent: 4670501 (1987-06-01), Dymond et al.
patent: 5387622 (1995-02-01), Yamamoto

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