C - Chemistry – Metallurgy – 08 – K
Patent
C - Chemistry, Metallurgy
08
K
C08K 13/02 (2006.01)
Patent
CA 2331052
The invention provides compositions and methods for imparting a translucent optical effect to transparent thermoplastic polymers. The compositions comprise the thermoplastic polymer and 0.01 to 15 parts per hundred by weight (preferably 0.1 to 6, more preferably 0.2 to 5 parts by weight, even more preferably 0.5 to 2 parts by weight, and most preferably 0.5 to 1.5 parts by weight) of at least one particulate, light diffusing material in the form of powders, fibers, whiskers, platelets, flakes, aggregates, agglomerates, and mixtures of these, comprising a average maximum particle size of from about 0.1 microns to about 200 microns (preferably from about 1 to about 100 microns). A first embodiment of the invention comprises a one step method for imparting the translucent optical effect. A second embodiment comprises a two step method, including the use of a concentrate; composition. The translucent optical effects are obtainable in a continuum of very smooth to very grainy, depending on the type and concentration of the particles employed. 39
Polyone Corporation
Sim & Mcburney
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