| 摘要 |
A compound having at least one 2-hydroxy-1,3-propylidene, 2-acetoxy-1,3-propylidene, or 2-alkoxy-1,3-propylidene moiety between two benzocyclobutene end moieties is prepared by (a) contacting a diepoxide species with a benzocyclobutene species containing a functionality capable of reacting with an epoxy group, (b) contacting an epoxy-containing benzocyclobutene species with a species containing two functionalities capable of reacting with an epoxy group, (c) contacting an epoxy-containing benzocyclobutene species with a benzocyclobutene species containing a functionality capable of reacting with an epoxy group, (d) contacting epichlorohydrin with benzocyclobutene species capable of reacting with an epoxy group, or (e) contacting epihalohydrin with benzocyclobutene species and difunctional species, wherein both species contain functionalities capable of reacting with epoxy groups. Each benzocyclobutene moiety is attached to the 2-hydroxy-1,3-propylidene moiety at the six-membered ring through oxygen or sulfur atoms, carboxyl, N-alkylimino, or 1,3-dioxyphenylene units. The unit linking the two benzocyclobutene moieties optionally contains aromatic moieties. The polymers prepared from the compounds are suitable for use in composites, coatings, adhesives, and binders. The polymers have outstanding processability and are mainly non-crystalline materials with low melt viscosities prior to the onset of curing.
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