Appeal No. 1997-2072
Application No. 08/261,544
Claim 1 is representative of the subject matter on appeal
and reads as follows:
1. In a process for preparing a Class A surface, fiber
reinforced molded article comprising
(A) providing a mold, having a cavity therein for forming the
fiber reinforced molded article, wherein at least a portion of
the mold cavity defines a mold cavity surface against surface
the article is to be molded,
(B) laying one or more fiber surfacing veils against the mold
cavity surface,
(C) laying one or more layers of fiber reinforcing mat over
said surfacing veil,
(D) laying one or more fiber surfacing veils over said fiber
mat,
(E) closing the mold,
(F) injecting a reaction mixture via the RIM process into said
mold cavity,
(G) allowing the reaction mixture to fully react, and removing
the resultant molded product from the mold,
the improvement wherein said reaction mixture comprises
(1) one or more polymethylene poly(phenyl isocyanates) (i)
having a diisocyanate content of from 25 to less than 50% by
weight, (ii) containing less than 2% by weight of 2,4'-
methylene bis(phenyl isocyanate), and (iii) containing less
than 0.5% by weight of 2,2'-methylene bis(phenyl isocyanate),
and
(2) a blend of active hydrogen containing compounds
comprising:
2
Page: Previous 1 2 3 4 5 6 7 8 9 10 11 12 13 Next
Last modified: November 3, 2007