Polymerization with living characteristics

Details Polymerization with living characteristics Polymerization with living characteristics

2007-05-25

2010-02-16

Powers, Fiona T (Department: 1626)

Organic compounds -- part of the class 532-570 series

Organic compounds

Esters having the thiocarboxylate group, -cx-, wherein the...

C558S396000

Reexamination Certificate

active

07662986

ABSTRACT:
This invention concerns a free radical polymerization process, selected chain transfer agents employed in the process and polymers made thereby, in which the process comprises preparing polymer of general Formula (A) and Formula (B) comprising contacting: (i) a monomer selected from the group consisting of vinyl monomers (of structure CH2═CUV), maleic anhydride, N-alkylmaleimide, N-arylmaleimide, dialkyl fumarate and cyclopolymerizable monomers; (ii) a thiocarbonylthio compound selected from Formula (C) and Formula (D) having a chain transfer constant greater than about 0.1; and (iii) free radicals produced from a free radical source; the polymer of Formula (A) being made by contacting (i), (ii) C and (iii) and that of Formula (B) by contacting (i), (ii) D, and (iii); and (iv) controlling the polydispersity of the polymer being formed by varying the ratio of the number of molecules of (ii) to the number of molecules of (iii); wherein Q, R, U, V, Z, Z′, m, p and q are as defined in the text.

REFERENCES:
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patent: 4594150 (1986-06-01), Levesque et al.
patent: 6765078 (2004-07-01), Husemann et al.
patent: 7332552 (2008-02-01), Benicewicz et al.
patent: 1282493 (1972-07-01), None
Kuliev et al., Chemical Abstracts, 107:201642, 1987.
Kuliev et al., Alkyl Dithiobenzoates as Additives For Lubricating Oils, Khimiya i Tekhnologiya Topliv i Masel, 9, 26-27, 1987.
English Translation of Kuliev et al., “Thiobenzoyl Alkyl Sulfides As Additives For Lubricating Oils”, Khimiya i Tekhnologiya Topliv i Masel, 9, 26-27, 1987.

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