C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
402/166, 402/250
C08G 65/26 (2006.01) C08F 8/32 (2006.01) C08G 59/50 (2006.01)
Patent
CA 1120643
ABSTRACT Novel, versatile aminolysis products are obtained by aminolyzing, with a polyamine of aliphatic nature, an oligomeric homopolymer of an alkyl methacrylate in which the alkyl group contains from 1 to 6 carbon atoms or an oligomeric copolymer of at least two alkyl methacrylates, such oligomers being produced from monomeric alkyl methacrylates by anionic polymerization to provide number average molecular weights in the range of 600 to 10,000 and preferably in the range of 1,000 to 5,000. Alternatively, an anionically polymerized homo-oligomer of a (C1-C6)- alkyl acrylate or co-oligomer of at least two alkyl acrylates in which the alkyl in at least one monomer has from 1 to 6 carbon atoms in the co-oligomer, and the alkyl in the comonomers may have from 1 to 18 or more carbon atoms, are aminolyzed with a polyamine of aliphatic nature. Instead of oligomers obtained by anionic polymeriza- tion of esters of acrylic acid or of esters of methacrylic acid, there may be used in the aminolysis, oligomers of cor- responding low molecular weight obtained by free radical poly- merization, and in this version there may also be included copolymers (not obtainable by anionic polymerization) of an ester of methacrylic acid with an ester of acrylic acid and also copolymers of one or more such esters with monomers not of ester type, such as styrene. The aminolysis products have outstanding utility in the coatings field, particularly as the hardener for curing epoxy resins.
294333
Emmons William D.
Stevens Travis E.
Gowling Lafleur Henderson Llp
Rohm And Haas Company
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