Method of chlorinating methyl groups of methyl vinyl aromatic po

Details Method of chlorinating methyl groups of methyl vinyl aromatic po Method of chlorinating methyl groups of methyl vinyl aromatic po

1986-07-03

1987-12-15

Schofer, Joseph L.

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

Synthetic resins

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

521 53, 521 55, 5253334, 5253591, 5253596, 525367, C08F 820

Patent

active

047134232

ABSTRACT:
A method for chlorinating the pendant methyl groups of poly(p-methylstyrene) with aqueous sodium hypochlorite (e.g., laundry or swimming pool bleach) and a phase transfer catalyst (e.g., benzyltriethylammonium chloride) to provide chloromethyl-substituted polystyrenes. Conversions of up to 20 percent of methyl to chloromethyl groups were achieved with no detectable formation of dichloromethyl groups. Conversions of up to 61 percent of methyl to chloromethyl groups occur with less than 4.4 percent concomitant formation of dichloromethyl groups. The method has been applied to soluble, 1 percent cross-linked, and macroporous 20 percent cross-linked polymers.

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