Heat-hardenable carrier-free foils

Abstract

Abstract THIS INVENTION RELATES TO A HEAT-HARDENABLE, CARRIER-FREE FOIL WHICH IS STABLE IN STORAGE, AND IMPACT-RESISTANT IN THE HARDENED CONDITION THEREOF, WHICH CONTAINS 0.05 TO 1% BY WEIGHT OF ACID CATALYST, AND (A) AN ELASTOMERIC COPOLYMERIZATE WHICH HAS A GLASS POINT OF NOT MORE THAN +10*C., AND WHICH IS OBTAINED BY POLYMERIZATION OF (A1) 70 TO 99% BY WEIGHT OF AN ACRYLIC ACID ALKYL ESTER WITH 1 TO 8 CARBON ATOMS IN THE ALKYL RESIDUE, AND (A2) 1 TO 20% BY WEIGHT OF AT LEAST ONE COMPOUND SELECTED FROM THE GROUP CONSISTING OF HYDROXYALKYL ESTER WITH 2 TO 4 CARBON ATOMS IN THE ALKYL RESIDUE AND AN ACID AMIDE OF ACRYLIC ACID OR METHACRYLIC ACID, WHEREIN THE SUM OF THE COMPONENT A1 AND A2 ADD UP TO 100% BY WEIGHT, AND (B) A HARD-BRITTLE COPOLYMERIZATE OBTAINED IN THE PRESENCE OF THE COPOLYMERIZATE A BY POLYMERIZATION OF (B1) 60 TO 80% BY WEIGHT OF AT LEAST ONE COMPOUND SELECTED FROM THE GROUP CONSISTING OF STYRENE AND A METHACRYLIC ACID ALKYL ESTER WITH 1 TO 20 CARBON ATOMS IN THE ALKYL RESIDUE, (B2) 1 TO 20% BY WEIGHT OF AN ACRYLIC ACID ALKYL ESTER WITH 1 TO 8 CARBON ATOMS IN THE ALKYL RESIDUE, (B3) 1 TO 20% BY WEIGHT OF AT LEAST ONE COMPOUND SELECTED FROM THE GROUP CONSISTING OF AN N-METHOXY-METHYL AMIDE OF ACRYLIC ACID OR METHACRYLIC ACID, (B4) 1 TO 20% BY WEIGHT OF A HYDROXY-ALKYL ESTER OF ACRYLIC ACID METHACRYLIC ACID WITH 2 TO 4 CARBON ATOMS IN THE ALKYL RESIDUE, AND (B5) 1 TO 20% BY WEIGHT OF ACRYLIC OR METHACRYLIC ACID AMIDE, WHEREIN THE MOLAR RATIO OF THE COMPONENT B3 TO THE SUM OF B4 AND B5 IS APPROXIMATELY 1:1 AND THE RATIO OF B4:B5 IS 4:1 TO 1:4, WHEREIN THE SUM OF THE COMPONENTS B1 TO B5 ADDS UP TO 100% BY WEIGHT, AND WHEREIN THE WEIGHT RATIO OF THE ELASTOMERIC COPOLYMERIZATE A TO THE HARD-BRITTLE COPOLYMERIZATE B IS 1:3 TO 1:20. THE INVENTION ALSO RELATES TO A PROCESS FOR THE PREPARATION OF THE HEATHARDENABLE CARRIER-FREE FOILS.

Inventors

• 👤 J Fock
• 👤 U Holtschmidt

Bibliographic Details