Process for chlorinating ethylene polymers

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...

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20415918, 526 22, 526 44, C08F 2703

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active

RE0293504

ABSTRACT:
A process for chlorinating solid, finely-divided ethylene polymers is disclosed, wherein the resulting chloropolyethylene has a statistical or hybridical distribution of chlorine in the polymer. The polymer is mixed with 10 - 100% by weight of water, based on the weight of the ethylene polymer, and the polymer is chlorinated with chlorine at a temperature which is above the crystalline melting point of the ethylene polymer during [at least 70%] a portion of the chorination period. The chlorination pressure is such that the boiling point of water at that pressure is at least equal to the chlorination temperature. The amount of water in the ethylene polymer is maintained at a level of at least 10% by weight based on starting ethylene polymer until the chlorination has proceeded at least to the point where the chlorine content of the polymer is 15% by weight.
The resulting chloropolyethylenes are useful in applications wherein previous chloropolyethylenes have been used, such as for mixing with synthetic polymers to improve the properties thereof.

REFERENCES:
patent: 3454544 (1969-07-01), Young et al.
patent: 3467640 (1969-09-01), Kaupp et al.
patent: 3563974 (1971-02-01), Eckardt et al.
patent: 3759888 (1973-02-01), Nose et al.
patent: 3935181 (1976-01-01), Schoen

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