Polymers of pivaloyloxyalkyl methacrylates, method for their pre

Details Polymers of pivaloyloxyalkyl methacrylates, method for their pre Polymers of pivaloyloxyalkyl methacrylates, method for their pre

1977-03-31

1978-12-19

Hamrock, William F.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526 47, 526 49, 526173, 526181, 526232, 526328, 526329, C08F 2210, C08F 432, C08F 434

Patent

active

041307054

ABSTRACT:
The invention relates to polymers and copolymers of pivaloyloxyalkyl methacrylates which contain structural units of the general formula ##STR1## where R.sup.1 is (CH.sub.2).sub.n.sbsb.1 --O (n.sub.1 = 2 to 10) or (CH.sub.2 CH.sub.2 --O).sub.n.sbsb.2 (n.sub.2 = 1 to 4) and to the method of their preparation and modification. The polymerization and copolymerization can be initiated by free-radical initiators of the peroxy type or by anionic initiators, e.g., alkali metal alkoxides or butyllithium, and carried out in a solution, bulk or suspension process in the presence of a crosslinking agent or without it. Anionic polymerization may result in stereoregular polymers or may be used for preparation of block copolymers by the "living" polymer technique. The polymers and copolymers can be modified by the partial or toal conversion of the pivaloyloxyalkyl methacrylate units into hydroxyalkyl methacrylate units by selective hydrolysis, alcoholysis or other reaction.

REFERENCES:
patent: 3454446 (1969-07-01), Sakuragi et al.
patent: 3544505 (1970-12-01), Nagata et al.

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