Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Reexamination Certificate
2011-06-14
2011-06-14
Reddy, Karuna P (Department: 1764)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
C524S504000, C524S500000, C524S601000, C524S589000, C524S502000
Reexamination Certificate
active
07960468
ABSTRACT:
An aqueous coating composition, comprisingA) at least one water-dilutable hydroxy-functional binder andB) at least one polyisocyanate crosslinking agent with free isocyanate groups,wherein component A) comprisesA1) 40-95 wt. % of at least one water-dilutable hydroxy-functional (meth)acrylic copolymer with a hydroxyl value of 60-250 mg of KOH/g and an acid value of 5-50 mg of KOH/g, which is obtained by free-radical copolymerization performed in a non-aqueous phase, wherein the ratio of primary hydroxyl groups to secondary hydroxyl groups in the (meth)acrylate copolymer A1) is 1:0.1 to 1:1.2 and at least 80% of the secondary hydroxyl groups result from reaction products of a monoepoxy ester and an unsaturated acid-functional monomer, andA2) 5-60 wt. % of at least one water-dilutable polyester oligomer, wherein the total of the weight percentages of component A1) and A2) add up to 100 wt. % and wherein the free-radical polymerization for the production of component A1) is performed at least in part in the presence of component A2) and/or wherein component A2) is added during polymerization or after completion of polymerization.
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The PCT International Search Report and the Written Opinion of the International Searching Authority, No. PCT/US2005/035080, mailed Feb. 13, 2006.
Becker Wiebke
Duecoffre Volker
Flosbach Carmen
Kleuser Birgit
Desbmukh Sudhir G.
E.I. Du Pont de Nemours and Company
Reddy Karuna P
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