Process for preparation of methacrylimide group containing polym

Details Process for preparation of methacrylimide group containing polym Process for preparation of methacrylimide group containing polym

1989-08-28

1991-06-11

Lipman, Bernard

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

Synthetic resins

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

5253299, 5253305, 525379, C08F 832

Patent

active

050233025

ABSTRACT:
A methacrylimide group-containing polymer having good optical characteristics, especially a resistance to coloration under heating and above to retain good light-transmitting characteristics for a long time even at a high temperature, is prepared by polymerizing methacrylic acid, a methacrylic acid ester, or a monomer mixture predominantly comprised of methacrylic acid or an ester thereof in the absence of a mercaptan chain transfer agent, and then imidizing the thus-prepared polymer. The resulting polymer is useful as the core component of a light-transmitting fiber having a core-sheath structure.

REFERENCES:
patent: 2146209 (1939-02-01), Graves
patent: 3234303 (1966-02-01), Bild et al.
patent: 3252950 (1966-05-01), Tereuzi et al.
patent: 3284425 (1966-11-01), Schroder et al.
patent: 4246374 (1981-01-01), Kopchik
patent: 4816524 (1989-03-01), Anzai et al.

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