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US3689592A Expired / Lapsed US ⏱️ 0.0 years remaining

Heat-hardenable, foil containing polymerizate with pendent glycidyl groups

Assignee: Evonik Operations GmbH
•
Filing: 1970-11-23
•
Granted: 1972-09-05
•
Expires: 1990-11-23
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Abstract

Abstract This invention relates to a heat-hardenable foil and process for the preparation thereof, the foil comprising a mixture of copolymerizates (A) and (B) in a weight ratio of 1:20 to 1:3, A. being an elastomeric copolymerizate obtained by polymerization of A. 70 TO 99 PER CENT BY WEIGHT OF AN ACRYLIC ACID ALKYL ESTER, WHOSE ALKYL RESIDUE HAS ONE TO EIGHT CARBON ATOMS, AND B. 1 TO 30 PER CENT BY WEIGHT OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF AN UNSATURATED MONOCARBOXYLIC ACID OR AN ANHYDRIDE OF AN UNSATURATED DICARBOXYLIC ACID, AND B. being a hard-brittle copolymerizate obtained by polymerization of A 60 TO 70 PER CENT BY WEIGHT OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF STYRENE OR A METHACRYLIC ACID ALKYL ESTER WHOSE ALKYL RESIDUE HAS ONE TO FOUR CARBON ATOMS, B 1 TO 20 PER CENT BY WEIGHT OF A GLYCIDYL ESTER OF ACRYLIC OR METHACRYLIC ACID, AND C. 1 TO 20 PER CENT BY WEIGHT OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF AN UNSATURATED MONOCARBOXYLIC ACID OR AN UNSATURATED DICARBOXYLIC ACID.

Inventors

  • 👤 Jurgen Fock
  • 👤 Ulrich Holtschmidt

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-02 13:53
CPC Classifications
C; C08; C08L; C08L25/00; C08L25/02; C08L25/04; C08L25/08; C08L25/14; C08F; C08F265/00; C08F265/04; C08L33/00; C08L33/04; C08L33/06; C08L33/08; C08L35/00; C08L35/06; C08L33/10; C08L33/12

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 23 words
A heat-hardenable foil according to claim 1 in which component (A) contains up to 20 per cent by weight of a vinyl monomer.
Claim 2
Dependent Claim 23 words
A heat-hardenable foil according to claim 2 in which the vinyl monomer is selected from the group consisting of styrene, acrylonitrile or methylmethacrylate.
Claim 3
Dependent Claim 34 words
A heat-hardenable foil according to claim 1 in which component (A) contains up to 2 per cent by weight of a cross-linking monomer having at least 2 reactive non-conjugated double bonds in the molecule.
Claim 4
Dependent Claim 23 words
A heat-hardenable foil according to claim 1 in which component (B) contains up to 20 per cent by weight of a vinyl monomer.
Claim 5
Dependent Claim 23 words
A heat-hardenable foil according to claim 5 in which the vinyl monomer is selected from the group consisting of styrene, acrylonitrile or methylmethacrylate.
Claim 6
Dependent Claim 21 words
A heat-hardenable foil according to claim 1 in which component (B) contains up to 3 per cent by weight of vinylpyridine.
Claim 7
Dependent Claim 59 words
A process for preparing a heat-hardenable foil which comprises polymerizing the monomers forming copolymerizates (A) and (B), as defined in claim 1, in separate batches in the form of an emulsion, separating the copolymerizates from the aqueous phase, dissolving them in a solvent, intermixing them in a desired mixing ratio, and forming the foil by evaporation of the solvent.
Claim 8
Dependent Claim 48 words
A process for preparing a heat-hardenable foil which comprises polymerizing the monomers forming copolymerizates (A) and (B), as defined in claim 1, in separate batches in the form of a solution, intermixing the solutions in a desired mixing ratio, and forming the foil by evaporation of the solvent.
Claim 9
Dependent Claim 71 words
A process for preparing a heat-hardenable foil which comprises first polymerizing the monomers forming copolymerizate (A), as defined in claim 1, in an emulsion, then adding the monomers forming copolymerzate (B), as defined in claim 1, to the emulsion of copolymerizate (A) and polymerizing the monomers of copolymerizate (B), separating the copolymerizate mixture from the aqueous phase, dissolving it in a solvent, and forming the foil by evaporation of the solvent.
Claim 10
Dependent Claim 57 words
A process for preparing a heat-hardenable foil which comprises first polymerizing the monomers forming copolymerizate (A), as defined in claim 1, in solution, then adding the monomers forming copolymerizate (B), as defined in claim 1, to the solution of copolymerizate (A) and polymerizing the monomers of copolymerizate (B), and forming the foil by evaporation of the solvent.

References Cited (Backward Citations)

US2849418A Cited
GB1106083A Cited
US3505128A Cited
US3580972A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1975-09-05 1976-03-06 1976-09-05 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-09-05 1980-03-06 1980-09-05 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-09-05 1984-03-06 1984-09-05 $7700.00 Window Closed / Lapsed

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