Method for producing prepolymers based on vinyl monomers

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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526 75, 526216, 526224, 526227, 526232, 526328, 5263295, 526346, 5263292, C08F 200, C08F 434, C08F22014

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042398754

ABSTRACT:
The present invention relates to a method for producing prepolymers based on vinyl monomers such as methacrylic acid esters, or a mixture of esters of methacrylic and acrylic acids, or styrene, or a mixture of styrene with methacrylic acid esters. The method consists in conducting mass polymerization of said vinyl monomers at a temperature of 90.degree. to 160.degree. C. in air, or in oxygen-enriched air, or in an inert gas medium in the presence of an initiating system. The system is made of a mixture consisting of:

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