Toughened two-component epoxy composition
AssigneeSika Technology AG
InventorsChristoph Mayer, Tobias Meier
Life of this patent
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Abstract
A two-component epoxy resin composition includes a first component K1 including at least one epoxy resin A that contains on average more than one epoxy group per molecule; and a second component K2 including a hardener B for epoxy resins; wherein the two-component epoxy resin composition contains between 2 and 35 wt.-%, based on the total weight of the composition, of at least one impact modifier I in either one or both of components K1 and K2; wherein the impact modifier I is a reaction product of at least one polymeric diol, at least one polyisocyanate, and cardanol. The two-component epoxy resin composition exhibits excellent toughness and impact peel strength.
Claims11
A two-component epoxy resin composition, comprising
- a first component K1 comprising at least one epoxy resin A that contains on average more than one epoxy group per molecule;
- and
- a second component K2 comprising a hardener B for epoxy resins;
- wherein the two-component epoxy resin composition contains between 2 and 35 wt.-%, based on the total weight of the composition, of at least one impact modifier I in either one or both of components K1 and K2;
- wherein the impact modifier I is a reaction product of at least one polymeric diol selected from the group consisting of polyoxypropylenediol and polyoxyethylene-polyoxypropylene copolymer diol, at least one polyisocyanate selected from the group consisting of to 4,4′-diphenylmethane diisocyanate, 2,4′-diphenylmethane diisocyanate, 2,2′-diphenylmethane diisocyanate and arbitrary mixtures thereof, and cardanol.
A method of manufacturing a two-component epoxy resin composition, the method comprising:
- introducing a reaction product of at least one polymeric diol selected from the group consisting of polyoxypropylenediol and polyoxyethylene-polyoxypropylene copolymer diol, at least one polyisocyanate selected from the group consisting of to 4,4′-diphenylmethane diisocyanate, 2,4′-diphenylmethane diisocyanate, 2,2′-diphenylmethane diisocyanate and arbitrary mixtures thereof, and cardanol as an impact modifier or a toughener into a two-component epoxy resin composition, wherein
- two-component epoxy resin composition comprises a first component K1 comprising at least one epoxy resin A that contains on average more than one epoxy group per molecule, and a second component K2 comprising a hardener B for epoxy resins.
Dependencies are inferred from the claim text.