Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Compositions to be polymerized by wave energy wherein said...
Reexamination Certificate
2008-01-04
2011-11-08
McClendon, Sanza (Department: 1765)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Compositions to be polymerized by wave energy wherein said...
C522S097000, C522S090000, C522S174000, C522S074000, C522S071000, C522S077000, C528S044000, C528S071000, C528S075000, C528S076000, C524S507000, C524S591000, C524S839000, C524S840000, C525S123000, C525S127000, C525S452000, C525S455000, C525S457000, C525S458000, C525S460000, C427S388400, C427S508000, C428S423100
Reexamination Certificate
active
08053488
ABSTRACT:
An ambient temperature curable hydrophilic PU oligomer includes a PU pre-polymer having a hydrophilic center group and a curable terminated group. The ambient temperature curable hydrophilic PU oligomer includes the moisture-curable hydrophilic PU oligomer such as isocyanate-terminated PU pre-polymer and free-radical curable hydrophlic PU oligomer. The isocyanate-terminated PU pre-polymer is synthesized by mixing at least one multi-isocyanate, at least one polyol and one or more diol monomer with hydrophilic group. The acrylate-terminated PU oligomer is synthesized by adding 2-hydroxyethyl methacrylate (HEMA) into the isocyanate-terminated hydrophilic PU pre-polymer. Either acrylate- or isocyanate-terminated PU oligomer can be applied on a textile or a glass surface with a thin-layer coating technology. The curing reactions of these hydrophilic thin-layer coatings are carried out with moisture or UV-radiation, respectively, at ambient temperature. These moisture-cured or UV-radiation cured hydrophilic PU coating has water-resistant properties and the hydrophilic characters remain unchanged.
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Chen Kan-Nan
Chen Po-Cheng
Hwang Jing-Zhong
Wang Shih-Chieh
McClendon Sanza
Shih Chun-Ming
Tamkang University
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