3-Dodecen → Dicyclopentadiene

In a nitrogen atmosphere, 50 parts of tetracyclo [4.4.12,8,17,10,0]-dodeca-3-ene (hereinafter abbreviated to “TCD”) and 50 parts of tricyclo[4.3.12,5,01,6]-deca-3,7-diene (trivial name: dicyclopentadiene; hereinafter abbreviated to “DCPD”) were copolymerized by using a knows metathesis ring-opening polymerization catalyst, and the copolymer was hydrogenated by a known procedure to give a hydrogenated TCD/DCPD ring-opened copolymer. The hydrogenated ring-opened copolymer had a number average molecular weight (Mn) of 28,004, a hydrogenation percentage of at least 99.8%, Tg of 135° C., and a melt flow rate of 3 g/10 min. To 100 parts of a pellet of the hydrogenated ring-opened copolymer, 0.05 part of pentaerythrityl-tetrakis[3(3,5-di-tert.-butyl-4-hydroxyphenyl)prapionate] was incorporated and the mixture was kneaded by e twin-screw extruder to give a pellet-form molding material. The pellet was heat-pressed at a resin temperature of 200° C. under a load of 300 kgf/cm2 for 3 minutes into a plate having a size of 20 mm×15 mm×3.0 mm (thickness). The plate was transparent and exhibited a minimum light transmittance of 90.0% at a wavelength of 400 nm to 700 nm.

1. customcopolymerized
2. customa knows metathesis ring-opening polymerization catalyst

ORD record

ord-f487385adabf4611957cf927cc0ed06e

Source dataset

uspto-grants-2003_04

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US06544610B1