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US 12,522,689 B2Granted
Mannich base epoxy curative, cured epoxy resins thereof and methods of preparing the same
OwnerPaul Jonesinventor
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Abstract
The invention relates to a Mannich base useful as an epoxy curative agent. In particular, the present invention is directed to a Mannich base derived from furfuryl alcohol, or a homopolymer or co-polymer thereof, an epoxy resin curative composition comprising the Mannich base, a cured epoxy resin obtainable using the composition, processes for preparing the Mannich base and uses thereof. An example of a Mannich base derived from furfuryl alcohol in accordance with the present invention is shown below (Structure I):
Claims17
A method of preparing a Mannich base for use as an epoxy resin curative, said method comprising:
- i) contacting a) a furfuryl alcohol component selected from the group consisting of polyfurfuryl alcohol, and a co-polymer of furfuryl alcohol, wherein the co-polymer of furfuryl alcohol comprises a phenol species, with b) an amine component selected from the group consisting of a primary monoamine, a secondary monoamine, a polyamine having primary amino groups, a polyamine having secondary amino groups, and a polyamine having primary and secondary amino groups;
- wherein the amine component is a saturated or unsaturated aliphatic amine and the molar range of amine component to furfuryl alcohol component range from 0.01:1 to 10:1;
- and
- ii) obtaining a Mannich base;
- and
- wherein step i) is performed in the presence of an aldehyde.
3 more elements
Dependencies are inferred from the claim text.