公开(公告)号：DE19605154A1

公开(公告)日：1997-08-14

申请号：DE19605154

申请日：1996-02-13

Applicant: DEGUSSA

Inventor： DORN KLAUS DR ,  SCHWIND HELMUT DR ,  HASKERL THOMAS DR ,  HOEPP MATHIAS DR ,  SCHOELA EGBERT DR ,  AUER ERICH ,  MOLNAR GERALD

IPC: C08F220/14 ,  C08F265/06 ,  A61N5/06 ,  C08F224/00 ,  C08J5/18 ,  C09K15/06

Abstract: In the preparation of methyl methacrylate copolymers with improved long-term UV-A transparency by copolymerisation of a monomer mixture in the presence of free-radical initiators and a sterically hindered amine, the monomer mixture comprises (a) 80-99.5 wt.% methyl methacrylate (MMA), 0-19.5 wt.% alkyl acrylate, (c) 0-10 wt.% alkyl methacrylate with more than 2 carbon (C) atoms in the alkyl group, styrene, vinyl acetate and/or monomers with 2 or more polymerisable double bonds and (d) 0.5-10 wt.% alpha -methylene- psi -butyrolactone(s) of formula (I); in which R = hydrogen (H); R , R , R , R = H, 1-7 C alkyl or halogen, in which the alkyl groups may be branched or linear, may contain nitrogen (N), phosphorus (P) and sulphur (S) hetero-atoms and may have O-alkyl and/or halogen substituents and/or contain carbonyl groups; and R or R with R or R may complete a 5- or 6-membered ring to form a bicyclic compound. Also claimed are acrylic 'glass' plates with improved long-term UV-A transparency, that can be obtained by bulk polymerisation of this composition.

公开(公告)号：DE19501182A1

公开(公告)日：1996-07-18

申请号：DE19501182

申请日：1995-01-17

Applicant: DEGUSSA

Inventor： SCHWIND HELMUT DR ,  HAUCH DIRK ,  HASKERL THOMAS DR ,  DORN KLAUS DR ,  HOEPP MATHIAS DR

IPC: C08F2/02 ,  C08F24/00 ,  C08F218/00 ,  C08F224/00

Abstract: Copolymers (CP) for the prodn. of cast glass or for moulding materials with high heat distortion temp. are obtd. by copolymerisation of (A) exo-methylene-lactone(s) of formula (I); with (B) unsatd. vinyl monomer(s) or different exo-methylene-lactones of formula (I). The claim does not include copolymers of alpha -methylene- gamma -butyrolactone with acrylonitrile, styrene, MMA or difunctional methacrylates, or copolymers of alpha -methylene- delta -valerolactone and styrene. Also claimed are (i) cast glass with low heat distortion, obtd. by bulk polymerisation of a syrup contg. (A) and (B) in an oven-type furnace; and (ii) mouldings with a high heat distortion pt., contg. copolymers (CP). In (I), n = 0 or 1; m = 0 or 1; n+m = 1 or 2; X and X are each =CH-R or two single-bonded gps. R and R ; one of the X gps. must be =CH-R and, if X is =CH-R , the sum of n+m must be 1; and R -R are each H, halogen or 1-7C alkyl (linear or branched, opt. contg. N, P or S hetero atoms and opt. substd. with alkoxy, halogen and/or carbonyl gps.), two of these R gps. may form a 5- or 6-membered ring.

公开(公告)号：GR3031083T3

公开(公告)日：1999-12-31

申请号：GR990402166

申请日：1999-08-26

Applicant: DEGUSSA

Inventor： SCHWIND HELMUT DR ,  HAUCH DIRK ,  HASSKERL THOMAS DR ,  DORN KLAUS DR ,  HOEPP MATHIAS DR

IPC: C08F2/02 ,  C08F24/00 ,  C08F218/00 ,  C08F224/00

Abstract: Copolymers (CP) for the prodn. of cast glass or for moulding materials with high heat distortion temp. are obtd. by copolymerisation of (A) exo-methylene-lactone(s) of formula (I); with (B) unsatd. vinyl monomer(s) or different exo-methylene-lactones of formula (I). The claim does not include copolymers of alpha -methylene- gamma -butyrolactone with acrylonitrile, styrene, MMA or difunctional methacrylates, or copolymers of alpha -methylene- delta -valerolactone and styrene. Also claimed are (i) cast glass with low heat distortion, obtd. by bulk polymerisation of a syrup contg. (A) and (B) in an oven-type furnace; and (ii) mouldings with a high heat distortion pt., contg. copolymers (CP). In (I), n = 0 or 1; m = 0 or 1; n+m = 1 or 2; X and X are each =CH-R or two single-bonded gps. R and R ; one of the X gps. must be =CH-R and, if X is =CH-R , the sum of n+m must be 1; and R -R are each H, halogen or 1-7C alkyl (linear or branched, opt. contg. N, P or S hetero atoms and opt. substd. with alkoxy, halogen and/or carbonyl gps.), two of these R gps. may form a 5- or 6-membered ring.