Following is a CAS database record representing a highly cited patent family.
|
CAS indexed 83 chemical substances from this document.
CAS subject entries for this document include: Polymerization; Chain transfer agents. | |
CAPLUS COPYRIGHT 2004 ACS on STN
| TITLE:
| Polymerization with living characteristics with controlled dispersity, polymers prepared thereby, and chain-transfer agents used in the same |
| INVENTOR(S):
| Le, Tam Phuong; Moad, Graeme; Rizzardo, Ezio; Thang, San Hoa |
| PATENT ASSIGNEE(S):
| E. I. Du Pont de Nemours & Co., USA; Le, Tam Phuong; Moad, Graeme; Rizzardo, Ezio; Thang, San Hoa |
| SOURCE:
| PCT Int. Appl., 88 pp. CODEN: PIXXD2 |
| LANGUAGE:
| English |
PATENT INFORMATION: PATENT NO. KIND DATE APPLICATION NO. DATE
--------------- ---- -------- --------------- --------
WO 9801478 A1 19980115 WO 1997-US12540 19970703
W: AU, BR, CA, CN, IL, JP, KR, MX, NZ, US
RW: AT, BE, CH, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE
CA 2259559 AA 19980115 CA 1997-2259559 19970703
AU 9736033 A1 19980202 AU 1997-36033 19970703
AU 728717 B2 20010118
EP 910587 A1 19990428 EP 1997-932627 19970703
EP 910587 B1 20011212
R: AT, BE, CH, DE, DK, ES, FR, GB, GR, IT, LI, LU, NL, SE, MC, PT,
IE, FI
BR 9710219 A 19990810 BR 1997-10219 19970703
CN 1228787 A 19990915 CN 1997-197601 19970703
NZ 333277 A 20000929 NZ 1997-333277 19970703
JP 2000515181 T2 20001114 JP 1998-505398 19970703
AT 210684 E 20011215 AT 1997-932627 19970703
ES 2166092 T3 20020401 ES 1997-932627 19970703
TW 384292 B 20000311 TW 1997-86109745 19970801
KR 2000023688 A 20000425 KR 1999-700145 19990109
ABSTRACT:
This invention concerns a free radical polymn. process, selected chain transfer agents employed in the process and polymers made thereby, in which the process comprises prepg. polymers (ZCS2Qq)pR (I) or Z'(CS2QqR)m (II), comprising contacting: (i) a monomer having repeating units Q, selected from vinyl monomers of structure CH2:CUV, maleic anhydride, N-alkylmaleimide, N-arylmaleimide, dialkyl fumarate and cyclopolymerizable monomers; (ii) a thiocarbonylthio compd. selected from (ZCS2)pR (III) and Z'(CS2R)m (IV) having a chain transfer const. .gtoreq.0.1; and (iii) free radicals produced from a free radical source; and controlling the polydispersity of the polymer being formed by varying the ratio of the no. of mols of (ii) to the no. of mols of (iii); I being made by contacting (i), (ii), III and (iii) and II by contacting (i), (ii), IV, and (iii). Z = H, Cl, (un)substituted alkyl, aryl, heterocyclyl, alkylthio, alkoxycarbonyl, CO2R", CO2H, O2CR", CONR"2, cyano, P(O)OR"2, P(O)R"2, polymer chain formed by any mechanism; Z' = m-valent moiety derived from a member of the group consisting of (un)substituted alkyl, aryl, or polymer chain, where the connecting moieties are selected from aliph. or arom. carbon and S; Q is selected from -C(U)(V)CH2- and repeating units from maleic anhydride, N-alkylmaleimide, N-arylmaleimide, dialkyl fumarate, and cyclopolymerizable monomers; U = H, halogen, (un)substituted C1-4 alkyl, with substituents selected from OH, alkoxy, OR", carboxy, acyloxy, O2CR", CO2R"; V = R", CO2H, CO2R", COR", CN, CONH2, CONHR", CONR"2, O2CR", OR", halogen. R = (un)substituted alkyl, (un)satd. alkylthio, alkoxy, dialkylamino, organometallic, polymer chain; in III and IV, R.cntdot. = a free radical leaving group that initiates free radical polymn.; R" = (un)substituted C1-18 alkyl, C2-18 alkenyl, aryl, heterocyclyl, aralkyl, alkaryl; p, q .gtoreq.1; m .gtoreq.2; R' = p-valent moiety selected from (un)substituted alkyl, aryl, polymer chain. Polymg. 4 mL of a stock soln. from 15 mL Me methacrylate, 20 mg AIBN, and 60.7 mg 2-phenyl-2-Pr dithiobenzoate in 5 mL benzene, in a degassed and sealed ampule at 60.degree. for 2 (16) h gave Mn 9800 (56,200), Mw/Mn 1.27 (1.12), and % conversion 13.5 (95.0)%.
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