Nitrile rubber/polyvinyl chloride blends

Details Nitrile rubber/polyvinyl chloride blends Nitrile rubber/polyvinyl chloride blends

1996-09-27

2000-03-28

Warzel, Mark L.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525192, 525195, 525233, 525234, 525235, 525238, 525239, 524525, 524527, 524565, 524567, C08L 902, C08L 2706

Patent

active

060433183

ABSTRACT:
Disclosed is a process for the making a polyvinylchloride/acrylonitrile-butadiene rubber blend by a) coating a polyvinylchloride resin with a stabilizer to form a precoated PVC; b) blending said precoated PVC with one or more acrylonitrile-butadiene rubbers to form a prestabilized NBR/PVC blend; and c) applying heat and pressure to intimately blend said prestabilized NBR/PVC blend into a fluxed NBR/PVC blend. Another aspect is a novel polyvinylchloride/acrylonitrile-butadiene rubber blend having a stabilizer homogeneously and uniformly distributed throughout the microscopic polyvinylchloride domains.

REFERENCES:
patent: 3505274 (1970-04-01), Kolberg
patent: 4008193 (1977-02-01), Scheidl et al.
patent: 4614756 (1986-09-01), Veldiserri
patent: 5021491 (1991-06-01), Abeler
patent: 5194498 (1993-03-01), Stevenson et al.
R.D. DeMarco et al. "Processing of Powdered PVC-NBR Polyblend Compounds" Rubber Chemistry and Technology, vol. 45. No. 4, Jun. 1972. at pp. 1111-1124, XP002048453 see p. 1119, last paragraph see p. 1114.
"Standard Test Methods for Rubber--Evaluation of NBR (Acrylonitrile-Butadiene Rubber).sup.1 ", American Society for Testing Materials, pp. 473-476.
"Heat Stabalizers", Encyclopedia of Chemical Technology, Jacqueline I. Kroschwitz; Mary Howe-Grant--4th ed., vol. 12, pp. 1071-1091.

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