Patent ID: 11859043
Assignee: MOMENTIVE PERFORMANCE MATERIALS INC.
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C  B | IPC B  C

Claim 18:
19. The process of claim 18 wherein the yttrium-containing catalyst (viii) of formula
(IV) is such that R1, R2 and R3 are each independently selected from hydrogen, methyl group, ethyl group, vinyl group, n-propyl group, isopropyl group, 1-propenyl group, allyl group, n-butyl group, s-butyl group, isobutyl group, t-butyl group, n-pentyl group, 1-methyl butyl group, 2-methyl butyl group, 3-methyl butyl group, 1,1-dimethyl propyl group, 1,2-dimethyl propyl group, 2,2-dimethylpropyl group, hexyl group, heptyl group, octyl group, nonyl group, decyl group, undecyl group, dodecyl group, cyclohexyl group, methyl cyclohexyl group, ethyl cyclohexyl group, phenyl group, benzyl group, tolyl group, phenethyl group, and trifluoromethyl group.