Solid composition

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...

Reexamination Certificate

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Details

C524S102000, C524S423000, C524S808000, C524S811000, C524S832000, C071S027000, C071S064010

Reexamination Certificate

active

06841599

ABSTRACT:
A solid, water-soluble or water-dispersible composition comprising a non film-forming material (such as a water-soluble agrochemical) supported by a film-forming polymer is prepared by (i) preparing a film-forming aqueous medium containing (a) a film-forming polymer which is a partially or fully charged homopolymer or a partially charged block copolymer or a homopolymer or block copolymer capable of ring-opening to form a partially charged homopolymer or block copolymer and (b) a water soluble material which is non film-forming (such as a glyphosate salt) and thereafter (ii) drying the film-forming aqueous medium to form the solid composition. The preferred film-forming polymer is alkyl vinylether maleic anhydride block co-polymer or a hydrolysed form thereof.

REFERENCES:
patent: 4045204 (1977-08-01), Matsunaga et al.
patent: 5378751 (1995-01-01), Deibig et al.
patent: 5766615 (1998-06-01), Narayanan
patent: 6528569 (2003-03-01), Oza et al.
patent: 2 095 558 (1982-10-01), None
patent: 9323999 (1993-12-01), None
patent: WO 9423573 (1994-10-01), None
patent: 9731528 (1997-09-01), None
patent: 9959407 (1999-11-01), None

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