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US 5,330,840 AGranted
Polysiloxane containing polyurethane and coated articles useful as toner fusing members
AssigneeEastman Kodak Company
InventorsJiann H. Chen, Tsang J. Chen, Lawrence P. DeMejo
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Abstract
Toner fusing members with improved properties are formed with an outer layer comprising a melamine-cured block polyurethane coating composition. Such a (A-B).sub.n' block polyurethane is formed by polycondensation of a diisocyanate, an organopolysiloxane diol and a C.sub.2-20 diol.
Claims3
A coated article comprising:
- a substrate, and coated thereon a composition comprising a crosslinked .sub.n' block copolymer product of,
- a polyurethane block copolymer and
- a melamine resin;
- wherein,
- said polyurethane comprises the polycondensation product of a mixture of reactants comprising:
- about 25 to 60 weight percent based on total weight of said products of an organopolysiloxane diol of the formula I, ##STR7## wherein, R.sup.1 and R.sup.2 are independently C.sub.1-6 alkylene;
- R.sup.3 -R.sup.6 are independently C.sub.1-6 alkyl or phenyl;
- and
- n is 3 to 300;
- a C.sub.2-20 diol that contains not more than one ester or one ether group;
- and
- a monomeric diisocyanate of the formula,
- OCN-D-NCO
- wherein,
- D is a hydrocarbon bridging group.
12 more elements
Dependencies are inferred from the claim text.