Following is a CAS database record representing a highly cited patent family.
|
CAS indexed 92 chemical substances from this document.
CAS subject entries for this document include: Coordination compounds; Polymerization catalysts; Aluminoxanes. | |
CAPLUS COPYRIGHT 2003 ACS
| TITLE:
| Constrained geometry addition polymerization catalysts, processes for their preparation, precursors therefor, methods of use, and novel polymers formed therewith |
| INVENTOR(S):
| Stevens, James C.; Timmers, Francis J.; Wilson, David R.; Schmidt, Gregory F.; Nickias, Peter N.; Rosen, Robert K.; Knight, George W.; Lai, Shih Yaw |
| PATENT ASSIGNEE(S):
| Dow Chemical Co., USA |
| SOURCE:
| Eur. Pat. Appl., 58 pp. CODEN: EPXXDW |
| LANGUAGE:
| English |
PATENT INFORMATION: PATENT NO. KIND DATE APPLICATION NO. DATE
--------------- ---- -------- --------------- --------
EP 416815 A2 19910313 EP 1990-309496 19900830
EP 416815 A3 19920311
EP 416815 B1 19970813
R: AT, BE, DE, ES, FR, GB, IT, NL, SE
CA 2024333 AA 19910301 CA 1990-2024333 19900830
CA 2024333 C 20010116
NO 9003797 A 19910301 NO 1990-3797 19900830
NO 176964 B 19950320
NO 176964 C 19950628
AU 9062039 A1 19910307 AU 1990-62039 19900830
AU 645519 B2 19940120
HU 59423 A2 19920528 HU 1990-5704 19900830
HU 209316 B 19940428
PL 166689 B1 19950630 PL 1990-286684 19900830
RU 2073018 C1 19970210 RU 1990-4831104 19900830
EP 764653 A2 19970326 EP 1996-119258 19900830
EP 764653 A3 19980211
EP 764653 B1 20020918
R: AT, BE, DE, ES, FR, GB, IT, NL, SE
EP 764664 A2 19970326 EP 1996-119354 19900830
EP 764664 A3 19980211
R: AT, BE, DE, ES, FR, GB, IT, NL, SE
EP 764654 A2 19970326 EP 1996-119394 19900830
EP 764654 A3 19980211
R: AT, BE, DE, ES, FR, GB, IT, NL, SE
EP 765888 A2 19970402 EP 1996-119603 19900830
EP 765888 A3 19980211
R: AT, BE, DE, ES, FR, GB, IT, NL, SE
EP 774468 A2 19970521 EP 1996-119530 19900830
EP 774468 A3 19980211
EP 774468 B1 20020918
R: AT, BE, DE, ES, FR, GB, IT, NL, SE
AT 156827 E 19970815 AT 1990-309496 19900830
ES 2106020 T3 19971101 ES 1990-309496 19900830
SG 81879 A1 20010724 SG 1996-4888 19900830
AT 224399 E 20021015 AT 1996-119258 19900830
AT 224400 E 20021015 AT 1996-119530 19900830
ES 2179145 T3 20030116 ES 1996-119258 19900830
ES 2179148 T3 20030116 ES 1996-119530 19900830
CN 1049849 A 19910313 CN 1990-107395 19900831
CN 1029850 B 19950927
JP 03163088 A2 19910715 JP 1990-228538 19900831
JP 2535249 B2 19960918
BR 9004460 A 19910910 BR 1990-4460 19900831
ZA 9006969 A 19920527 ZA 1990-6969 19900831
CZ 287606 B6 20010117 CZ 1990-4259 19900831
NO 9303289 A 19910301 NO 1993-3289 19930915
NO 179043 B 19960415
NO 179043 C 19960724
NO 9303290 A 19910301 NO 1993-3290 19930915
JP 07053618 A2 19950228 JP 1994-79125 19940314
JP 07070223 A2 19950314 JP 1994-79126 19940314
NO 9504469 A 19910301 NO 1995-4469 19951107
ZA 9608655 A 19980414 ZA 1996-8655 19961014
US 6075077 A 20000613 US 1997-958361 19971027
CZ 287632 B6 20010117 CZ 1999-2974 19990820
US 2002128403 A1 20020912 US 2001-37335 20011106
US 2003065203 A1 20030403 US 2001-37765 20011106
US 2003120004 A1 20030626 US 2002-270212 20021011
ABSTRACT:
Title catalysts are prepd. having structures I [M = metal; Cp = (substituted) cyclopentadienyl group bound in an .eta.5 bonded mode to M; Z = groups contg. B, S, O, etc., optionally Cp and Z together form a fused ring system; X = anionic or neutral Lewis base ligands having .ltoreq.30 non-H atoms; n = 0-4; Y = anionic or nonanionic ligands bonded to Z and M comprising N, P, O or S and having .ltoreq.20 non-H atoms, and optionally Y and Z together form a fused ring system. Addn. polymn. of, esp. ethylene with comonomers, using the metal complexes activated by cocatalysts gives highly elastic copolymers. Thus, 0.443 g ZrCl4 in 8 mL Et2O and 15 mL THF was slowly added with 0.500 g dilithium (tert-butylamido)dimethyl(tetramethylcyclopentadienyl)silane in 15 mL THF, and stirred for several days to give a (tert-butylamido)dimethyl(tetramethyl-.eta.5-cyclopentadienyl)silane zirconium dichloride which was used with Me aluminoxane cocatalyst in polymn. of C2H4 with 4-methyl-1-pentene or with hexene-1.
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