Appeal No. 2000-1448 8
Application No. 08/709,975
particularly important property for stabilizers which are trivalent phosphorous esters is their
non-hygroscopicity and resistance to hydrolysis in the presence of moisture in the
atmosphere during ambient storage.” See column 7, lines 50-54. We find that
“hydrolysis of the phosphorous ester stabilizers during storage frequently results in
compounds which are less effective.” See column 7, lines 57-60. The phosphorous
compounds disclosed by Spivack include those corresponding to Ph-11 of the claimed
subject matter. See column 2, lines 1-26. There is however, no disclosure or suggestion
of placing the composition in permanent contact with water.
GB ‘362 is likewise directed to processing stabilizer compositions containing
phosphites or phosphonites. We find that GB ‘362 is concerned with hydrolytically
decomposed phosphites and phosphonites being far less effective when used as stabilizers.
See page 1. An important advantage described is that phosphonites when incorporated
into polymers are also protected from the influence of moisture humidity and water so that
the properties of the polymers are not adversely affected. Id. We find that patentee is
concerned that the problem of the hydrolysis of phosphites is especially aggravated in
polyolefins. See page 2. We further find that the resistance of processing stabilizers like
phosphites and phosphonites is improved by the use of HALS, sterically hindered amine
light stabilizer, compounds. Id. We find that the phosphites disclosed include those
corresponding to the Ph-3 of the claimed subject matter. See Formula I, pages 4 and 5.
We find that the Table on page 33 discloses a polymeric HALS material in combination
Page: Previous 1 2 3 4 5 6 7 8 9 10 11 12 13 Next
Last modified: November 3, 2007