Beneficiated talcs

Details Beneficiated talcs Beneficiated talcs

1987-01-14

1989-04-11

Schofer, Joseph L.

Compositions: coating or plastic

Materials or ingredients

Pigment, filler, or aggregate compositions, e.g., stone,...

424 69, 524451, 524377, 524385, 427221, 523205, C04B 1400

Patent

active

048203475

ABSTRACT:
Means are disclosed for rendering talcs such as Montana talc or like talcs hitherto considered incompatible or unsuitable as fillers for thermoplastic resinous compositions, and particularly polypropylene molding resins, suitable for this use. Such talcs, which in their unbeneficiated state strongly discolor the resinous matrix and affect its long-term heat stability, are beneficiated in accordance with this invention, generally at low cost, while improving or at least not unacceptably diminishing other significant physical properties, particularly yellowness index, flexural modulus and impact strength, of the resulting molded article. This is accomplished by admixing Montana talc or the like with an effective amount of a combination of:

REFERENCES:
patent: 3553158 (1971-01-01), Gilfillan
patent: 3803065 (1974-04-01), Arai et al.
patent: 4116897 (1978-09-01), Huszar et al.
patent: 4255303 (1981-03-01), Keogh
patent: 4263050 (1981-04-01), Yamanaka et al.
patent: 4411704 (1983-10-01), Galeski et al.
Bragg et al, Plastics Engineering, vol. 30, No. 9, pp. 30-32 (Sep. 1974).
Radosta, Plastics Compounding, Sep./Oct. 1979, pp. 23, 24, 26-28 & 30.
Mathur et al, in Society of Plastics Engineers Technical Papers, vol. 25, pp. 663-667 (1979).
Shimizu et al, in Japanese Kokai 75 8,098, published Apr. 2, 1975 (Chem. Abst. 83: 98595j (1975)).
Tsunetsugu et al, Japanese Kokai 75 109,239, published Aug. 28, 1975 (Chem. Abst. 83: 207145k (1975)).
Rusznak et al, Muanvag Gumi, vol. 16, No. 9, pp. 257-261 (Hung. 1979; Chem. Abst. 92: 42775m (1980)).
Tokuyama Soda's, Japanese Kokai 80 142,039, published Nov. 6, 1980 (Chem. Abst. 94: 122583d (1981)).
Matsumoto et al, Japanese Kokai 78 65,346, published Jun. 10, 1978 (Chem. Abst. 89: 147656q (1978)).
Goel et al, Polym. Eng. Sci., vol. 20, No. 3, pp. 198-201 (1980) (Chem. Abst. 92: 129772g (1980)).
Research Disclosure, vol. 173, No. 19 (1978) (Chem. Abst. 89: 180758x (1978)).
Hughes, "Deactivation of Catalysts"; New York: Academic Press; 1984; pp. 9-12.

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