TITANIUM DIOXIDE-CONTAINING POLYESTER COMPOSITION AND PREPARATION THEREOF

Japanese Patent JP3563626

B2

PROBLEM TO BE SOLVED: To provide a titanium dioxide-containing polyester composition which has good dispersibility and decreases metal wearability, obtained by adding certain amounts of the titanium dioxide which have specified average particle diameters and are certain amounts or below of coarse particles of each specified diameter, certain P2O5 and K2O contents, certain ignition loss ratios, certain crystalline particle size and no Fe contents.
SOLUTION: A polyester composition contains titanium dioxide of 5.0-70.0 wt.% on the basis of the total weight of the composition, said titanium dioxide being conducted prescribed surface treatment to control its solid state properties. The titanium dioxide is satisfied with each factor that an average particle diameter is 0.1-0.5 μm, coarse particles of at least 3 μm of a particle diameter are 15,000 number/mg or below, coarse particles of at least 4 μm of a particle diameter are 7,500 number/mg or below, P2O5 is contained by 0.4-0.6 wt.% on the basis of total weight of titanium dioxide, K2O is contained by 0.1-0.3 wt.% ignition loss ratios are by 0.4 wt.% or below, the values that the weight of rutile type, crystalline state is divided by that of anatase type are by 9×10-3 or below, crystalline size is 10-150 nm and Fe is substantially not contained.

Toru Takase
Tomoyoshi Yamamoto
Takuo Nakao
Eisuke Kurihara

JP5235699A

September 08, 2004

March 01, 1999

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TEIJIN FIBERS LIMITED

C08J3/20; C08J3/205; C08K3/22; C08L67/02; (IPC1-7): C08L67/02; C08J3/205; C08K3/22

JP63105059A
JP10017753A
JP9057929A
JP62054723A

Hideko Mihara

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