Patent DE-102008018905-A1 (DE)
Title: Polyionic copolymer, which is made of cyclic ketene acetal e.g. 2-methylen-1,3-dioxepan, methacrylic acid derivative e.g. 2-methyl-methacryalte compound and methacrylic acid derivative e.g. acrylonitrile, useful e.g. as adhesives
Inventor: AGARWAL SEEMA
IPC: C08G63/42
Filed: 2008-04-14
Abstract: Hydrolytically degradable polyionic copolymer, which is made of 10-55 mol.% of cyclic ketene acetal (A), 5-90 mol.% of methacrylic acid derivative (B), 0-80 mol.% of methacrylic acid derivative (C), is claimed; where: (A) is e.g. 2-methylen-1,3-dioxepane and 5,6-benzo-2-methylen-1,3-dioxepane; (B) is e.g. 2-methyl-methacryalte compound (VII) and 2-(2-methyl-1-methylen-allyloxy)ethyl-ethane sulfonate compound (VIII); and (C) is e.g. vinyl acetate and acrylonitrile. Hydrolytically degradable polyionic copolymer, which is made of 10-55 mol.% of cyclic ketene acetal (A), 5-90 mol.% of methacrylic acid derivative (B), 0-80 mol.% of methacrylic acid derivative (C), is claimed; where: (A) is 2-methylen-1,3-dioxepane, 5,6-benzo-2-methylen-1,3-dioxepane, 2-methylen-1,3-dioxane, 5,6-dialkyl-2-methylen-1,3-dioxepane compound of formula (IV), 2-methylen-1,3-dioxolane or 4,5-dimethyl-2-methylen-1,3-dioxolane compound of formula (VI); (B) is 2-methyl-methacryalte compound of formula ((CH 2=C(CH 3)-C(=O)-O ->) (M +>)) (VII), [2-(2-methyl-1-methylen-allyloxy)ethyl]-ethane sulfonate compound of formula ((C(=CH 2)(CH 3)-C(=O)-O-CH 2-CH 2-S(=O) 2-O ->) (M +>)) (VIII), [2-(2-methyl-1-methylen-allyloxy)ethyl]-phosphonate compound of formula ((C(=CH 2)(CH 3)-C(=O)-O-CH 2-CH 2-P(=O)(O ->)(O ->)) (2M +>)) (IX), or N,N-dimethylaminoethylmethacrylic acid compound of formula (C(=CH 2)(CH 3)-C(=O)-O-CH 2-CH 2-N(CH 3) 2) (Xa) (where 45-95% of (Xa) exists in ionized form of a quaternary amine compound of formula ((C(=CH 2)(CH 3)-C(=O)-O-CH 2-CH 2-N +>(R 3>)(CH 3) 2) (X ->)) (Xb)); and (C) is a carboxyl group containing compound of formula (C(=CH 2)(CH 3)-C(=O)(R 4>)) (XII), vinyl acetate, acrylonitrile, 2-hydroxyethylmethacrylate, N-vinylformamide, N-vinylacetamide, N-methyl-N-vinylacetamide, N-vinylcaprolactam, N-vinylpyrrolidone, N-2-hydroxypropylmethacrylamide, N-3-hydroxypropylmethacrylamide, N,N-dimethylacrylamide, styrene or N,N-dimethylaminostyrene. R 1>, R 2>1-12C-alkyl group; M +>Li, Na, P, ammonium or tretraalkylammonium cations; R 3>1-12C-alkyl or a benzyl group of formula (XI); n : 0-12; X ->F, Cl or Br; R 4>OCH 3, N(CH 3) 2, oligoethylene glycol of formula (-O-(CH 2-CH 2-O) m-H), omega -methoxy-olioethylene glycol of formula (-O-(CH 2-CH 2-O) m-CH 3); and m : 1-12. Independent claims are included for: (1) the preparation of the cationic copolymer comprising free radical copolymerization of the components (A), (Xa) and (C) in the presence of a radical initiator, purifying the obtained neutral copolymers, reacting the neutral copolymers with a quaternizing reagent, so that 45-95% of (Xa) is quaternized and purifying the obtained ionic copolymers; and (2) the preparation of an anionic copolymer comprising polymerizing the components (A), (B) and (C) in the presence of a radical initiator under inert gas atmosphere and subsequently purifying the obtained ionic copolymer. [Image] [Image].