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
2008-01-01
2008-01-01
Gulakowski, Randy (Department: 1712)
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...
C525S454000, C525S455000
Reexamination Certificate
active
07314899
ABSTRACT:
This invention describes a process to synthesize water based coating composition having polyurethane and vinyl polymers in the same backbone, which can be used as topcoat in leather. Polyurethane having iniferter groups are synthesized which is then used to incorporate vinyl monomers. The ionic groups are incorporated into PU by selecting vinyl monomers having carboxyl group. The controlled addition of the vinyl monomers is successfully achieved. Finally, it is dispersed in water to obtain the PU dispersion. The suitability of the product for coating application is evaluated on leather. The coating meets desirable protective and aesthetic demands.
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Gupta Sanjeev
Narasimhan Vijayalakshmi
Radhakrishnan Ganga
Ranganathan Rajaraman
Sundar Saimani
Council of Scientific & Industrial Research
Figueroa John J
Gulakowski Randy
RatnerPrestia
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