Appeal No. 2004-2031
Application No. 09/773,286
17. A method of improving a molded polyurea
polymer’s blister resistance, said method comprising:
(A) adding an effective amount of a fatty acid
ester to a polyisocyanate and an isocyanate-reactive
material to prepare a polyurea-polymer mixture, said
fatty-acid ester being jojoba oil; and
(B) molding said mixture to prepare a molded
polyurea polymer, wherein said molded mixture is
substantially free of blisters and has improved
blister resistance, as compared to a molded mixture
that is substantially free of jojoba oil, when exposed
to moisture and a temperature of at least about 390ºF
(199ºC), said molded polyurea polymer being exposed to
said temperature for at least 20 minutes and no longer
than 60 minutes.
18. The method of claim 17, wherein said mixture
has an isocyanate index between 1.05 and 1.40.
19. The method of claim 17, wherein said mixture
further comprises a polyepoxide.
24. The method of claim 17, wherein said molded
mixture is substantially free of blisters and has
improved blister resistance, as compared to a molded
mixture that is substantially free of jojoba oil, when
exposed to a temperature of at least about 400ºF
(204ºC).
The examiner relies upon the following references as
evidence of unpatentability:
Barron et al. (Barron) 5,525,681 Jun. 11, 1996
Muenstermann WO 96/22182 Jul. 25, 1996
Claims 17, 18, 21-25, and 35 stand rejected under 35 U.S.C.
§ 102(b) as being anticipated Muenstermann.
Claims 19, 33, 34, and 36-45 stand rejected under 35 U.S.C.
§ 103 as patentable over Muenstermann in view of Barron.
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