C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
C08F 2/24 (2006.01) C08F 2/22 (2006.01) C08F 212/00 (2006.01) C08F 220/00 (2006.01) C08F 220/12 (2006.01) C09D 133/08 (2006.01)
Patent
CA 2064081
2064081 9102007 PCTABS00003 A polymeric emulsion comprising a (i) polymer, (ii) water, and (iii) a surfactant is useful for producing a water-resistant film. The polymer comprises about 25 to about 90 weight percent of a soft monomer whose homopolymer has a Tg of less than about -20 ·C, about 10 to about 75 weight percent of a hard monomer whose homopolymer has a Tg of greater than about 30 ·C, about 1 to about 5 weight percent of an olefinic carboxylic acid, and about 0.5 to about 5 weight percent of a cross-linking agent. Typically, the polymer comprises less than about 1 weight percent surfactant and has a Tg of about -50· to about 50 ·C and an average particle size of less than about 250 nm. The emulsion generally comprises at least about 40 weight percent solids and has a surface tension of at least about 45 dynes/cm.
Biale John
Gowling Lafleur Henderson Llp
Rohm And Haas Company
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