Appeal No. 2003-1625
Application No. 09/341,669
wherein a molding of 100 mm thickness prepared from
said molding composition has a transmission of 89-92%, and
wherein the yellow index according to DIN 6167
(D65/10E) or according to ASTM D 1925 of a molding of 100 mm
thickness prepared from said molding composition is at least
40% lower than a molding of 100 mm thickness prepared from
said molding composition without said one or more reducing
inorganic phosphorus compounds.
28. A method for producing a molding composition
consisting essentially of a polymer and one or more reducing
inorganic phosphorus compounds, comprising:
adding to said polymer, wherein said polymer is
comprised of 80-100 weight-percent of methyl methacrylate
monomer units and 0-20 weight-percent of C1- to C4-alkyl
ester of acrylic acid monomer units, 0.0005 to 0.005 weight-
percent, based on the weight of said polymer, said one or
more reducing inorganic phosphorus compounds selected from
the group consisting of phosphinic acid, phosphonic acid,
alkali metal salts of phosphinic acid, alkali metal salts of
phosphonic acid, alkaline earth salts of phosphinic acid,
alkaline earth salts of phosphonic acid, aluminum salts of
phosphinic acid, aluminum salts of phosphonic acid, ammonium
salts of phosphinic acid, and ammonium salts of phosphonic
acid, wherein the ammonium salts may be substituted with up
to four C1- to C4-alkyl and/or C5- to C8-cycloalkyl groups.
32. A method for producing a molding composition
consisting essentially of a polymer which is not a
core/shell polymer and which is comprised of 80-100 weight-
percent of methyl methacrylate monomer units and 0-20
weight-percent of C1- to C4-alkyl ester of acrylic acid
monomer units and a reducing inorganic phosphorus compound,
wherein the method comprises:
adding to said polymer 0.0005 to 0.005 weight-percent,
based on the weight of said polymer, of one or more reducing
inorganic phosphorus compounds selected from the group
consisting of phosphinic acid, phosphonic acid, alkali metal
salts of phosphinic acid, alkali metal salts of phosphonic
acid, alkaline earth salts of phosphinic acid, alkaline
3
Page: Previous 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Next
Last modified: November 3, 2007