Diallyl terephthalate prepolymer and process for producing seam

Abstract

A diallyl terephthalate prepolymer consisting essentially of diallyl terephthalate monomer units, having (a) 10 or less of the monomer units in the carbon-carbon bonded molecular chain portion which is composed of the allyl groups of the monomer units, and either (b) an unsaturation in a range of from 40 to 70, as represented by an iodine value determined by the Wijs method, (c) a number-average molecular weight in a range of from 6,000 to 10,000 as polystyrene, and a weight-average molecular weight in a range of from 10,000 to 70,000 as polystyrene, both being determined by gel permeation chromatography, and (d) a melt viscosity in a range of from 30,000 to 90,000 CP at 170.degree. C., as determined by a Koka flow tester, or (b) an unsaturation in a range of from 50 to 80, as represented by an iodine value determined by the Wijs method, (c) a number-average molecular weight in a range of from 8,000 to 20,000 as polystyrene, and a weight-average molecular weight in a range of from 30,000 to 90,000 as polystyrene, both being determined by gel permeation chromatography, and (d) a melt viscosity in a range of from 20,000 to 90,000 CP at 130.degree. C., as determined by a Koka flow tester.

Dependencies are inferred from the claim text.