Internally plasticized poly(vinyl chloride)

Details Internally plasticized poly(vinyl chloride) Internally plasticized poly(vinyl chloride)

1974-04-12

1976-04-06

Henderson, Christopher A.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260 75N, 260192, 260475P, 260860, 260899, C08L 2706, C08L 6700

Patent

active

039490157

ABSTRACT:
Macroazonitrile molecules formed of flexible poly(ethylene oxide) segments connected by azo linkages are heated in the presence of vinyl chloride to initiate the addition polymerization of the monomer onto the ends of the poly(ethylene oxide) segments. An ABA type block copolymer is formed wherein the A parts are poly(vinyl chloride) segments and B is a poly(ethylene oxide) block which was originally part of the macroazonitrile. The flexible poly(ethylene oxide) segments of this block serve as an internal (intramolecular) plasticizer such that the copolymer may be used in applications typically filled by externally plasticized poly(vinyl chloride). External plasticizers are still required but their concentrations may be reduced to a level where plasticizer migration problems are eliminated.

REFERENCES:
patent: 3752802 (1973-08-01), Sheppard
Furukawa, J. et al., Chem. Abst., 68, 96448(e), 1968.

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