Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1994-10-06
1996-07-16
Smith, Jeffrey T.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525157, 525165, 525471, C08L 6100
Patent
active
055367844
ABSTRACT:
This invention relates to improved water-based polymeric dispersions having suitability for coatings and other applications which are based upon polymers having a plurality of acetoacetate functional groups and a crosslinkable component comprising a plurality of aromatic aldimine. The basic acetoacetate/benzaldimine containing system comprises an aqueous polymeric dispersion wherein the polymer has a plurality of acetoacetate groups and an effective amount of a curing agent having a plurality of benzaldimine functional groups. The improvement in providing for water-stable polymeric dispersions suitable for coatings and other applications comprises an aqueous dispersion comprising a polymeric component preferably derived from a plurality of polymerizable ethylenically unsaturated monomer units having pendant araldimine or heterocyclic aldimine functionality. Acetoacetate containing monomers generally are used in forming the polymer and a preferred monomer acetoacetoxyethymethacrylate. The polymer incorporating a plurality of benzaldimine functionality generally is formed by emulsion or suspension polymerization and the adimine functionality is benzaldimine.
REFERENCES:
patent: 3668183 (1972-06-01), Hoy et al.
patent: 4743668 (1988-05-01), Fong et al.
patent: 5288804 (1994-02-01), Kim et al.
Kim, Kyu-Jun and Roy C. Williams, "Utilization of the Novel Acetoacetate Chemistry in Solvent and Water Borne Coatings" presented at Water-Borne, Higher Solids and Powder Coatings Symposium, Feb. 24-26, 1993.
Chen Ning
Mao Chung-Ling
Tien Chao-Fong
Air Products and Chemicals Inc.
Brewer Russell L.
Leach Michael
Marsh William F.
Smith Jeffrey T.
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