Back to results
US 5,880,235 AGranted
Copolymers useful for producing cast glass and thermally dimensionally stable molding materials
AssigneeAGOMER Gesellschaft mit beschrankter Haftung
InventorsHelmut Schwind, Dirk Hauch, Thomas Hasskerl, Klaus Dorn, Mathias Hopp
Life of this patent
Estimating the term…
Abstract
The invention relates to copolymers for producing cast glass or thermally dimensionally stable formed materials.
Claims24
A copolymer for producing cast glass or formed materials with elevated thermal dimensional stability, prepared by copolymerizing:
- A) at least one .alpha.-methylene-.gamma.-butyrolactone of formula II ##STR7## wherein R.sup.1 =H or CH.sub.3, and
- R.sup.2, R.sup.3, R.sup.4 and R.sup.5 are the same or different and are H, C.sub.1 -C.sub.7 -alkyl or halogen, independently of each other, and the C.sub.1 -C.sub.7 -alkyl groups are branched or linear, N, P, or S heteroatom-substituted, O-alkyl substituted, or can carry halogen substitution and/or carbonyl groups,
- and B) at least one vinylically unsaturated monomer,
- with the proviso that a) copolymers of .alpha.-methylene-.gamma.-butyrolactone with acrylonitrile, acrylic acid esters, butadiene, styrene, methylmethacrylate or bifunctional methacrylates, and b) copolymers of .alpha.-methylene-.delta.-valerolactone and styrene are excepted.
1 more element
A thermally dimensionally stable cast glass bodies obtained by mass polymerization of a syrup in a chamber kiln wherein the syrup comprises:
- A) At least one at least one .alpha.-methylene-.gamma.-butyrolactone of formula II ##STR8## wherein R.sup.1 =H or CH.sub.3, and
- R.sup.2, R.sup.3, R.sup.4 and R.sup.5 are the same or different and are H, C.sub.1 -C.sub.7 -alkyl or halogen, independently of each other, and the C.sub.1 -C.sub.7 -alkyl groups are branched or linear, N, P, or S heteroatom-substituted, O-alkyl substituted, or can carry halogen substitution and/or carbonyl groups,
- and B) at least one vinylically unsaturated monomer with the proviso that a) copolymers of .alpha.-methylene-.gamma.-butyrolactone with acrylonitrile, acrylic acid esters, butadiene, styrene, methylmethacrylate or bifunctional methacrylates, and b) copolymers of .alpha.-methylene-.delta.-valerolactone and styrene are excepted.
A copolymer for producing cast glass or formed materials with elevated thermal dimensional stability, prepared by copolymerizing:
- A) At least one exo-methylene lactone of the formula I ##STR9## wherein n=0 or 1,
- m=0 or 1 and the sum n+m is either 1 or 2;
- X.sup.1 and X.sup.2 each stand for .dbd.CH--R.sup.1 or two single-bonded substituents R.sup.2 and R.sup.3, and only one of X.sup.1 or X.sup.2 is .dbd.CH--R.sup.1, and where X.sup.1 is .dbd.CH--R.sup.1 the sum of n+m must be 1;
- and wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6 and R.sup.7 are the same or different and are H, C.sub.1 -C.sub.7 -alkyl or halogen, independently of each other,
- and the C.sub.1 -C.sub.7 -alkyl groups are branched or linear, N, P, or S heteroatom-substituted, O-alkyl substituted, or can carry halogen substitution and/or carbonyl groups,
- wherein a 5 or 6-member ring is formed in part with two of groups R.sup.1 to R.sup.7,
- with
- B) at least one vinylically unsaturated monomer, with the proviso that a) copolymers of .alpha.-methylene-.gamma.-butyrolactone with acrylonitrile, acrylic acid esters, butadiene, styrene, methylmethacrylate or bifunctional methacrylates, and b) copolymers of .alpha.-methylene-.delta.-valerolactone and styrene are excepted.
5 more elements
A copolymer for producing cast glass or formed materials with elevated thermal dimensional stability, prepared by copolymerizing:
- A) At least one .gamma.-methylene-.gamma.-butyrolactone of the formula III ##STR10## wherein R.sup.2, R.sup.3, R.sup.4 and R.sup.5 are the same or different and are H, C.sub.1 -C.sub.7 -alkyl or halogen, independently of each other, and the C.sub.1 -C.sub.7 -alkyl groups are branched or linear, N, P, or S heteroatom-substituted, O-alkyl substituted, or can carry halogen substitution and/or carbonyl groups,
- and wherein a 5 or 6-member ring is formed in part with two of groups R.sup.1 to R.sup.7
- with
- B) at least one vinylically unsaturated monomer, with the proviso that a) copolymers of .alpha.-methylene-.gamma.-butyrolactone with acrylonitrile, acrylic acid esters, butadiene, styrene, methylmethacrylate or bifunctional methacrylates, and b) copolymers of .alpha.-methylene-.delta.-valerolactone and styrene are excepted.
1 more element
A copolymer for producing cast glass or formed materials with elevated thermal dimensional stability, prepared by copolymerizing:
- A) At least one .alpha.-methylene-.delta.-butyrolactone of the formula IV ##STR11## wherein R.sup.2, R.sup.3, R.sup.4 and R.sup.5 are the same or different and are H, C.sub.1 -C.sub.7 -alkyl or halogen, independently of each other, and the C.sub.1 -C.sub.7 -alkyl groups are branched or linear, N, P, or S heteroatom-substituted, O-alkyl substituted, or can carry halogen substitution and/or carbonyl groups,
- and wherein a 5 or 6-member ring is formed in part with two of groups R.sup.1 to R.sup.7
- with
- B) at least one vinylically unsaturated monomer, with the proviso that a) copolymers of .alpha.-methylene-.gamma.-butyrolactone with acrylonitrile, acrylic acid esters, butadiene, styrene, methylmethacrylate or bifunctional methacrylates, and b) copolymers of .alpha.-methylene-.delta.-valerolactone and styrene are excepted.
1 more element
Dependencies are inferred from the claim text.