Poly(5-imidazolone) and process therefor
AssigneeW. R. Grace & Co.-Conn.
InventorShiow C. Lin
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Abstract
This invention relates to novel polymers, i.e., poly(5-imidazolones) and a process for preparing same from the reaction of a diazlactone with a primary diamine and thereafter dehydrating the resultant polyamide product. The polymers have good thermal properties and can be used as a composite matrix with a refinforcing agent such as fiber glass.
Claims6
A poly(5-imidazolone) having recurring structural units selected from the formula group consisting of:
- ##STR9## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are each independent organic moieties.
A composition comprising 1 to 70 percent by volume of reinforcing agent with the balance being a poly(5-imidazolone) having recurring structural units selected from the formula group consisting of ##STR10## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are each independent organic moieties.
A process of forming a poly(5-imidazolone) which comprises reacting an azlactone from the formula group consisting of ##STR11## wherein R.sub.1, R.sub.2 and R.sub.4 are independent organic moieties with a primary diamine at a temperature in the range of about 30.degree.-200.degree. C. to form a polyamide and thereafter dehydrating the thus formed polyamide at a temperature in the range 140.degree.-300.degree. C. to form the poly(5-imidazolone).
Dependencies are inferred from the claim text.