PURPOSE: To obtain a monofunctional polyacrylic ester useful as a chain-stopping agent in the production of aromatic polycarbonates by subjecting a specific mercaptosilane and a specific (meth)acrylic ester to quasi-ionic polymn. reaction.
CONSTITUTION: This monofunctional polyacrylic acid ester is represented by formula 1 (wherein X is a single bond, a 1-8C alkylene, S or O, etc.; (n) is 0 or 1; R1 is H, CH3 or CN; R2 is a 1-12C alkyl, a 5-6C cycloalkyl or a 7-15C aralkyl and these alkyl groups may be perfectly or partially fluorinated and (m) is an integer of 30-500) and has a number average mol.wt. Mn of 3000-50000 and <1.5 polydispersion D. This monofunctional polyacrylic ester is produced by subjecting a mercaptosilane represented by formula II (wherein X and (n) are same to those in formula 1; R is a 1-16C alkyl or a 5-6C cycloalkyl) and a (meth)acrylic ester represented by formula III (R1 and R2 are same to those in the formula 1) to quasi-ionic polymn. reaction.
GERUTO RENAA
KARURUUERUBIN PIIJIKO
BURUUNO BEEMAA
ARUFUREETO YUNGU
BERUNAA NOUFUERUTONE
Next Patent: COATING COMPOSITION