| Patent Number |
Title Of Patent |
Date Issued |
| 4078148 |
Polyether esters |
March 7, 1978 |
| Polyether ester polymers of tetrahydrofuran and .gamma.-butyrolactone or hexamethyleneoxide and .gamma.-butyrolactone. The polymers are prepared by contacting the mentioned monomers in the presence a fluoride or chloride of antimony or a chloride of tin or titanium. The polymers can be u |
| 4031163 |
Hardenable resins based upon allyl compounds |
June 21, 1977 |
| A cross-linked polymer having units of a residue of a chlorinated xylyleneglycolbisallylether, units of a residue of maleic acid anhydride and units of a residue of an epoxy compound; an improvement in a process for the preparation of a cross-linked hardenable resin wherein a composi |
| 3976623 |
Copolymers of 1,2-dimethoxy-ethylene and .beta.-lactones or cyclic six-membered ring carbonates |
August 24, 1976 |
| A copolymer of 1,2-dimethoxy ethylene and a cyclic compound having an oxygen atom as a component of the chain, said copolymer having the formula: ##EQU1## wherein Y is a straight bond or --CH.sub.2 --O--, R.sup.1 and R.sup.2 are independently hydrogen or alkyl of 1-4 carbon atoms |
| 3947402 |
Process for the manufacture of polyimide products |
March 30, 1976 |
| In a process for the manufacture of a polyimide from a polyamide carboxylic acid solution by cyclodehydration of the polyamide carboxylic acid, the improvement which comprises carrying out said cyclodehydration in the presence of a nitrogen containing compound selected from the group |
