Epoxy-cyanate ester compositions that form interpenetrating networks via a Bronsted acid
AssigneeMinnesota Mining and Manufacturing Company
InventorsIlya Gorodisher, Michael C. Palazzotto
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Abstract
A polymerizable composition of matter comprises a cycloaliphatic epoxy resin, a cyanate ester resin, optionally a polyol, and, as initiator, a Bronsted acid. When cured, the compositions provide interpenetrating polymer networks (IPNs). The IPNs are useful as high temperature stable vibration damping materials, adhesives, binders for abrasives, and protective coatings.
Claims32
A polymerizable composition of matter comprising
- a cycloaliphatic epoxy resin,
- a cyanate ester resin, and
- as single initiator, a Bronsted acid.
A method of polymerizing monomers to provide an interpenetrating polymer network comprising the steps of:
- preparing a miscible mixture of cycloaliphatic epoxy resin, a cyanate ester resin, and as initiator a Bronsted acid, and
- polymerizing said monomers sequentially at temperatures differing by at least 20.degree. C., so as to provide said IPN.
A kit comprising a two-part composition, a first part comprising a cycloaliphatic epoxy resin and a cyanate ester resin, and a second part comprising as initiator a single Bronsted acid and optionally at least one of a polyol and a stabilizer.
A polymerizable composition of matter comprising
- a cycloaliphatic epoxy resin,
- a cyanate ester resin, and
- as a single initiator, a Bronsted acid, said composition being capable of producing a plurality of intermeshed polymers, each highly crosslinked, with essentially no cycloaliphatic epoxy-cyanate ester cross-reactions.
Dependencies are inferred from the claim text.