Back to results
US 10,472,460 B2Granted
Use of substituted benzyl alcohols in reactive epoxy systems
AssigneeEvonik Degussa GmbH
InventorsEmmanouil Spyrou, Martina Ortelt, Dirk Fuchsmann, Britta Kohlstruk, Elke Gollan, Andrea Henschke, Jens Hillen
Life of this patent
Estimating the term…
Abstract
The present invention relates to the use of substituted benzyl alcohols as modifiers in epoxy systems.
Claims20
A composition comprising:
- A) at least one resin having epoxy groups,
- B) at least one amine hardener,
- C) at least one modifier in the form of a benzyl alcohol further substituted on a carbon atom of the aromatic ring with a ring substituent, wherein the ring substituent is selected from the group consisting of an alkoxy group, a dialkylamino group, a linear alkyl having at least four carbon atoms, a, branched alkyl having at least four carbon atoms, and a cyclic alkyl group having at least four carbon atoms, and, optionally,
- D) at least one auxiliary,
- wherein said composition excludes an epoxy novolac, and,
- wherein in component C), only one other ring substituent is present alongside hydroxymethyl group of the benzyl alcohol.
3 more elements
A composition comprising:
- A) at least one resin having epoxy groups,
- B) at least one amine hardener,
- C) at least one modifier in the form of a benzyl alcohol further substituted on at least one carbon atom of the aromatic ring with at least one ring substituent, wherein the ring substituent(s) are selected from the group consisting of alkoxy group(s), dialkylamino group(s), linear alkyl having at least four carbon atoms, branched alkyl having at least four carbon atoms, and cyclic alkyl having at least four carbon atoms, and, optionally,
- D) at least one auxiliary,
- wherein said composition excludes an epoxy novolac, and
- wherein a boiling point of the at least one modifier is at least 240° C., and wherein the composition is capable of curing to produce a cured coating with a heat resistance of more than 30° C. after one day.
3 more elements
A coating composition, sealant, composite or adhesive, comprising:
- a composition, which comprises:
- A) at least one resin having epoxy groups,
- B) at least one amine hardener,
- C) at least one modifier in the form of a benzyl alcohol further substituted on at least one carbon atom of the aromatic ring with at least one ring substituent, wherein the ring substituent(s) are selected from the group consisting of alkoxy group(s), dialkylamino group(s), linear alkyl having at least four carbon atoms, branched alkyl having at least four carbon atoms, and cyclic alkyl groups having at least four carbon atoms, and, optionally,
- D) at least one auxiliary,
- wherein said composition excludes an epoxy novolac,
- wherein an amount of the at least one modifier C) is from 5 to 20% by weight, based on the sum of the masses of the compounds A), B) and C),
- wherein the coating composition, sealant, composite or adhesive has a curing temperature of from 5 to 260° C.,
- wherein a boiling point of the at least one modifier is at least 240° C., and
- wherein the composition is capable of curing to produce a cured coating with a heat resistance of more than 30° C. after one day.
7 more elements
Dependencies are inferred from the claim text.