Polymer resulting from the cure of a preformed chromene-containi

Details Polymer resulting from the cure of a preformed chromene-containi Polymer resulting from the cure of a preformed chromene-containi

1990-06-01

1992-10-13

Henderson, Christopher

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526247, C08F22400

Patent

active

051551969

ABSTRACT:
This invention relates to a solvent process for the conversion of aromatic propargyl ethers into chromenes. The process can be catalyzed with copper or zinc salts. The preferred salt is cuprous chloride. The most preferred solvent is a dichlorobenzene. The invention also relates to chromene products formed using the process and to the polymerization of that chromene product and its polymerized product, the latter product having substantially improved flexural modulus and flexural strength properties. The polymerized product is also moisture insensitive.

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