초록 ▼

High thermal stabilities are achievable in linear or multidimensional sulfone, solvent resistant oligomers by incorporating oxazole, thiazole, or imidazole linkages into the oligomer backbone. Blended oligomers of crosslinking oligomers and noncrosslinking compatible polymers are also described. The

High thermal stabilities are achievable in linear or multidimensional sulfone, solvent resistant oligomers by incorporating oxazole, thiazole, or imidazole linkages into the oligomer backbone. Blended oligomers of crosslinking oligomers and noncrosslinking compatible polymers are also described. The oligomers include residues of four-functional compounds of the formula: [Figure] (or isomers thereof) wherein M=－CO－, －S－, －O－, －SO2－or －(CF3)2C－; and Y=－OH, －SH, or －NH2. In an improved method, the reactants are condensed at or below ambient temperature in the presence of pyridine in a suitable solvent such as N,N′-dimethylacetamide (DMAC).

대표청구항 ▼

An oligomer comprising the product of simultaneously reacting in a suitable solvent in the presence of pyridine under an inert atmosphere a mixture including: (a) 2 moles of a phenylimide acid chloride having the general formula: [Figure] (b) n moles of a linear hydrocarbon moiety having terminal ac

An oligomer comprising the product of simultaneously reacting in a suitable solvent in the presence of pyridine under an inert atmosphere a mixture including: (a) 2 moles of a phenylimide acid chloride having the general formula: [Figure] (b) n moles of a linear hydrocarbon moiety having terminal acid chloride functionalities and a plurality of aryl rings wherein at least two aryl rings are connected by a linkage selected from the group consisting of －SO2－, －S－, －CO－, and －(CF3)2C－; and (c) n+1 moles of at least one four-functional compound selected from the group consisting of: [Figure] wherein R is selected from the group consisting of radicals of the general formula: [Figure] M=－CO－, －S－, －O－, －SO2－, or －(CF3)2C－; Z is selected from the group consisting of －OH, －SH, or －NH2; Ph=phenyl; i=1 or 2; n is selected so that the oligomer has a formula weight of between about 500 and about 30,000; Q is selected from the group consisting of: [Figure] [Figure] R1=lower alkyl, aryl, substituted aryl, lower alkoxy, or mixtures thereof; G=－SO2－, －S－, －O－, or －CH2－; j=0, 1, or 2; Me=methyl; and T=allyl or methallyl.