Appeal No. 1999-2534
Application No. 08/577,915
Usifer relates to urethane (meth)acrylate compositions that can be cured with
ultraviolet radiation. (Usifer at col. 2, ll.28–30.) According to Usifer, such monomers
are useful as adhesives for a variety of materials. (Id. at col. 1, l.64, through col. 2, l.2.)
Usifer teaches that organofunctional silanes may be added to the inventive
compositions as adhesion promoters. (Id. at col. 5, ll.27–48.) Free-radical forming
agents such as peroxides or azonitriles may be added to facilitate secondary thermal
curing of the adhesive compositions. (Id. at col. 5, ll.21–26.) Usifer does not teach
reacting the silanes with the urethane containing monomers prior to further reaction, nor
does Usifer teach impregnation of foams or similar materials with the inventive
compositions.
Berger
Berger relates to curable isocyanate prepolymers in which all or some of the
isocyanate groups have been reacted with a secondary amine-containing silane
monomer having two trialkoxysilane groups. (Berger abstract; col. 2, l.10, to col. 3, l.3.)
According to Berger, the multiplicity of hydrolyzable –Si(OR)3 groups permits a large
number of sites for bonding to substrates through the resultant hydroxyl groups as well
as reinforced bonding via bridging between the –Si(OR)3 groups. (Id. at col. 13,
ll.47–55; col. 2, ll.1–3.) Berger characterizes the examples as “moisture curable”
sealants that cure under ambient conditions. (Id. at cols. 7–13.)
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