Epoxy resin-based composition modified for impact resistance
AssigneeHenkel AG & Co. KGaA
InventorsRainer Schoenfeld, Emilie Barriau, Stefan Kreiling, Pablo Walter
Life of this patent
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Abstract
A resin component for a one- or two-component adhesive, a matrix resin, or a structural foam, comprising: C1) at least one epoxy resin, having an average of more than one epoxy group per molecule, that does not correspond to the definition of component C2); C2) at least one oligomeric or polymeric urethane-group-free polyether compound. A one- or two-component epoxy adhesive, structural foam, or matrix material for composites, comprising the aforesaid resin components.
Claims22
A resin component for a one- or two-component adhesive or a structural foam, comprising
- C1) at least one epoxy resin, having an average of more than one epoxy group per molecule, that does not correspond to the definition of component C2);
- C2) at least one oligomeric or polymeric urethane-group-free polyether compound encompassing one or more structural elements of the general formula (I)
- where n is a number from 5 to 10,000;
- each residue Ra in each repeating unit denotes, mutually independently, a divalent connecting group that encompasses 1 to 100 carbon atoms;
- and each residue A in each repeating unit is selected, mutually independently, from K or L, K denoting a divalent residue of aromatic dihydroxy compounds after removal of the two hydroxyl groups, and L denoting a divalent residue of polyethers after the removal of two terminal hydroxyl groups, with the provision that, based on the total number of all residues A in the oligomeric urethane-group-free polyether compound, 20 to 80% of all residues A denote K, and 20 to 80% of all residues A denote L, and
- having terminal epoxy groups and having an epoxy equivalent weight of between 1000 and 3000 g/mol, with continuously connected polypropylene oxide blocks of 5 to 18 C3H6O repeating units and aromatic blocks which contain at least one phenylene structural unit.
A resin component for a one- or two-component adhesive or a structural foam, comprising
- C1) at least one epoxy resin, having an average of more than one epoxy group per molecule, that does not correspond to the definition of component C2);
- C2) at least one oligomeric or polymeric urethane-group-free polyether compound encompassing one or more structural elements of the general formula (I)
- where n is a number from 5 to 10,000;
- each residue Ra in each repeating unit denotes, mutually independently, a divalent connecting group that encompasses 1 to 100 carbon atoms;
- and each residue A in each repeating unit is selected, mutually independently, from K or L, K denoting a divalent residue of aromatic dihydroxy compounds after removal of the two hydroxyl groups, and L denoting a divalent residue of polyethers after the removal of two terminal hydroxyl groups, with the provision that, based on the total number of all residues A in the oligomeric urethane-group-free polyether compound, 20 to 80% of all residues A denote K, and 20 to 80% of all residues A denote L, and that is the reaction product of polypropylene oxide diglycidyl ether having an epoxy equivalent weight between 170 and 400 g/mol, bisphenol A, and a diglycidyl ether of bisphenol A or bisphenol F having an epoxy equivalent weight between 156 and 550 g/mol and an epoxy equivalent weight of the reaction product between 1000 and 3000 g/mol.
Dependencies are inferred from the claim text.