Method for producing modified polyphenylene oxides

Details Method for producing modified polyphenylene oxides Method for producing modified polyphenylene oxides

1980-03-31

1981-08-11

Ziegler, J.

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

Synthetic resins

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

260 8, 260 17A, 260 172, 260 292R, 260 296NR, 260 37R, 525132, 525391, 525397, 525905, C08F28308

Patent

active

042835119

ABSTRACT:
A method for producing a modified polyphenylene oxide which comprises polymerizing 69 to 25 parts by weight of a mixture of 97 to 45% by weight of a styrene monomer and 3 to 55% by weight of a polar vinyl mononer at 90.degree. to 190.degree. C. using 0.3 to 10 parts by weight of a radical initiator in an aqueous dispersion containing a dispersion stabilizer alone or in combination with at least one of a surfactant and an adhesion-preventing agent in the presence of 31 to 75 parts by weight of a polyphenylene oxide having a unit structure of the formula, ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are each a hydrogen or halogen atom, or a hydrocarbon, substituted hydrocarbon, cyano, hydrocarbonoxy, substituted hydrocarbonoxy, nitro or amino group.

REFERENCES:
patent: 3781382 (1973-12-01), Izawa et al.
patent: 3862263 (1975-01-01), Maruta et al.

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