E.i. Dupont De Nemours and Company

Dwight A Holtzen

Patricia Ann Tooley

Joseph Anthony Musiano

Peter Dwight Spohn

James Francis Hunt

Robert Sterrett Jenkins

James Thomas Walnock

Austin Henry Reid, Jr

John Nicholas Birmingham

John N Birmingham, Jr

White-pigmented polymers (particularly polyolefins such as polyethylene) containing white pigments treated with at least one silane or a mixture of at least one silane and at least one polysiloxane are disclosed to improve processibility in compounding and improve performance properties such as lacing resistance in a polymeric matrix.

Processibility and lacing resistance when silanized pigments are

White-pigmented polymers (particularly, polyolefins such as polyethylene) containing white pigments treated with at least one silane or a mixture of at least one silane and at least one polysiloxane are disclosed to improve processibility in compounding and improve performance properties such as lacing resistance in a polymeric matrix.

Laser marking of pigmented fluoropolymer substrates is enhanced by using titanium dioxide pigment coated with organo silane.

Laser marking of fluoropolymer composition

An improved inorganic pigment (e.g., TiO.sub.2), process for treating such pigment and polymer (e.g., polyethylene, polypropylene or polystyrene) incorporating such pigment wherein the inorganic pigment is coated with maleic, malonic, benzoic, fumaric, or phthalic acid or mixtures thereof. The coated pigments exhibit excellent resistance to polymer yellowing or discoloration and do not appear to degrade polymer properties.

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Newark, DE, United States of America

Dwight A Holtzen