Thermoplastic PVC molding compositions

Details Thermoplastic PVC molding compositions Thermoplastic PVC molding compositions

1985-02-04

1986-09-02

Seccuro, Carman J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

524179, 524180, 524504, 524517, 525 71, 525 74, 525207, C08L 2706, C08L 2508, C08L 5104

Patent

active

046097015

ABSTRACT:
Blends of (a) a vinyl chloride polymer having a relative viscosity as measured at a concentration of 1 gram per 100 grams of cyclohexanone at 25.degree. C. falling within the range of about 1.50 to about 1.85; (b) a copolymer of a vinyl aromatic compound and an .alpha.,.beta.-unsaturated cyclic anhydride in which the relative proportions of said compound and said anhydride fall within the range of about 91 to about 70 weight percent of said compound and about 9 to about 30 weight percent of said anhydride; and (c) a tin-containing stabilizer and an impact modifier for vinyl chloride polymers. These blends contain 60 to 40 weight percent of (a) and 40 to 60 weight percent of (b) and have an Izod impact strength (ASTM D 256, Method A) of at least 0.5 foot pound per inch; a heat deflection temperature (ASTM D 648) at 66 psi of at least 75.degree. C.; and a dynamic thermal stability of at least 10 minutes.

REFERENCES:
patent: 3626033 (1971-12-01), Keskkula et al.
patent: 3632839 (1972-01-01), Young et al.
patent: 3720734 (1973-03-01), Kopachi et al.
Journal of Polymer Science-Fava et al., vol. 21, pp. 791-796 (1977).

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