Appeal No. 2000-1448 2
Application No. 08/709,975
THE INVENTION
The invention is directed to a process for stabilizing a thick walled polyolefin
molding and placing said molding in permanent contact with water. The stabilizer
comprises three specific components including a phosphite, a sterically hindered phenolic
compound, and a sterically hindered amine having a molecular weight greater than 1000.
Additional limitations are disclosed in the following illustrative claim.
THE CLAIM
Claim 35 is illustrative of appellants’ invention and is reproduced below:
35. A process for stabilizing and using a thick-walled polyolefin molding, which
comprises incorporating into, or applying to said thick-walled polyolefin molding, a
mixture of from about 0.02 to about 0.6%, based on weight of polyolefin, of
component (b); from about 0.02 to about 0.5%, based on weight of polyolefin, of
component (c); and from about 0.02% to about 1.0%, based on weight of
polyolefin, of component (d), wherein:
component (b) is selected from the group consisting of tris(2,4-di-tert-butylphenyl)
and compou
nds of formulas
Ph-3 and Ph-
11;
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