Polyplastics Co., Ltd.

Masamichi Mitsuuchi

Tsuyoshi Minamisawa

Hiroshi Kitamura

Hideo Kakizaki

Exceptional whiteness of glass-filled thermoplastic resin compositions is achieved by incorporating a white-pigmenting effective amount of the anatase form of titanium dioxide. The anatase form of titanium dioxide surprisingly improves the whiteness of glass-filled thermoplastic resin materials while also improving its physical properties (e.g., tensile strength and tensile elongation properties).

Glass-reinforced thermoplastic resin compositions containing the anatase

Melt-stable polyacetal molding compositions include a polyacetal base resin, and a carbon black-impregnated ethylenic carrier polymer in amounts to yield between about 0.1 to 30 parts by weight of carbon black. The ethylenic carrier polymer is preferably present in an amount between 0.3 to 8 times by weight of the carbon black impregnated therewithin. The compositions of this invention further contain a co-stabilization package which includes a first stabilizer selected from nitrogen-containing compounds, fatty acid ester compounds, and metal-containing compounds which contain a hydroxide, an inorganic acid salt or a carboxylic acid salt of an alkali metal or an alkaline earth metal, and a second stabilizer which is a hindered phenolic compound. Preferably, the first and second stabilizers are each used in amounts between 0.01 to 5 parts by weight, based on 100 parts by weight of the polyacetal base resin.

Melt-stable recyclable carbon black-laden polyacetal resin molding

Polyester compositions exhibiting decreased distortion (warpage), improved processability and productivity are produced by melt-blending a thermoplastic polyester resin with between 3 to 65% by weight of a fibrous reinforcement medium, and between 3 to 65% by weight of binder-agglomerated glass granules.

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Shizuoka, Japan

Masamichi Mitsuuchi