WPINDEX Search Illustrating Left- and Right-Hand Truncation
From: PO1::"CHMINF-L@IUBVM.UCS.indiana.edu" "CHEMICAL INFORMATION SOURCES DISCUSSION LIST" 5-JAN-1994 13:55:09.40
To: Multiple recipients of list CHMINF-L
CC:
Subj: Dow Patent
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Sender: CHEMICAL INFORMATION SOURCES DISCUSSION LIST
Poster: "Ellen Mimnaugh enm83, ext 2061, room 2381A"
Subject: Dow Patent
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In regards to the Dow patent, a search of WPINDEX on STN reveals a patent
from July not April. Is this the one you want? This search was possible
because STN allows left hand truncation in the basic index of WPI.
Ellen Mimnaugh
Chemical Abstracts Service/STN International
enm83@cas.org
There was an article in CHEMICAL WEEK Dec. 22/29 1993 issue, page 10
DOW PLASTICS has received a US composition of matter patent on the structure
of polymers based on Insite metallocene technology. It says that the World
Patent Office published such a patent for DOW in April.
Now I tried locating this patent using US Patents FULLTEXT and
Derwent without much success. Can any one out there give me pointers to this
patent - patent number etc.
Thanks
Dr. S.Krishnan
National CHemical Lab.,
Pune 411 008
INDIA
e-mail: ncl@iucaa.ernet.in
**************************
Script from WPINDEX
s dow/pa
******************************
* *
L2 16916 DOW/PA * Search for Dow as patent *
* assignee; limit to patents *
=> ps l1 ran=(93-0,) * issued since 1993.Then look*
L3 617 DOW/PA * for any metallocenes using *
* left and right truncation. *
=> ps l3 and ?ocene? * *
1277 ?OCENE? ******************************
L4 1 L3 AND ?OCENE?
=> pd iall
L4 ANSWER 1 OF 1 COPYRIGHT 1994 DERWENT
ACCESSION NUMBER: 93-227283 [28] WPINDEX
DOC. NO. CPI: C93-101242
TITLE: Ethylene polymer prod. prepn. for prodn. of
ethylene alpha olefin interpolymer - by
polymerising homogeneous ethylene polymers
utilising activated constrained geometry catalyst
compsns. with differing reactivities, and
combining.
DERWENT CLASS: A17 F01
INVENTOR(S): CARDWELL, R S; KOLTHAMMER, B W S; PARIKH, D R
PATENT ASSIGNEE(S): (DOWC) ***DOW CHEM CO***
COUNTRY COUNT: 20
PATENT INFORMATION:
PATENT NO KIND DATE WEEK LA PG MAIN IPC
------------------------------------------------
WO9313143 A1 930708 (9328)* EN 33 C08F-010-02
RW: AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE
W: CA FI JP KR
APPLICATION DETAILS:
PATENT NO KIND APPLICATION DATE
-----------------------------------------------------
WO9313143 A1 92WO-US11269 921229
PRIORITY APPLN. INFO: 91US-0815716 911230
REFERENCE PATENTS: EP-128046; EP-416815; US-401345; US4937299
INT. PATENT CLASSIF.:
MAIN: C08F-010-02
SECONDARY: C08F-297-08
ABSTRACT:
WO 9313143 A UPAB: 931213
Prodn. involves (a) prepg. homogeneous ethylene (co)polymers (IIIA,
IIIB) with melt index 0.05-50 g/10, using differing activated
constrained geometry catalyst compsns. (IVA, IVB); and (b) combining
50-96 (wt.)% (IIIA) with 5-50% (IIB).
Pref. prodn. of ethylene copolymer (1-2), comprises
polymerising (IIIA) contg. 5-30% (II) and (IIIB) 2-10% (II).
Fabricated articles, esp. films, mouldings and fibres are pref.
made from (I-2).
Pref. (II) is 2-18C alpha-olefins, pref. ethylene, 1-propene,
isobutylene, 1-butene, 1-hexene, 4-methyl-1-pentene, and/or esp.
1-octene. (IVA) comprises a Ti complex and aluminoxane cocatalyst
(V); and (IVB) of a Zr complex, pref. a ***zirconocene***
complex, and (V); and (IVA) and/or (IVB) comprise Ti, V, Hf and/or
Zr complex(es). Pref. (IIIA) has m.pt. = 0-110 deg.C and (IIIB)
m.pt. = 115-130 deg.C and these are mixed to give (I-2) with Tc at
least 5 deg.C higher than that of (III) produced using the more
reactive (IV). (Tc = at least 110 deg.. Pref. (IIIA) and (IIIB) are
prepd. simultaneously in the same reactor, pref. by injecting a
mixt. of (IVA) and (IVB); or (IIIA) and (IIIB) are prepd. separately
in differing reactors, which may be operated in series or parallel.
USE/ADVANTAGE - (I) has a higher crystallisation onset temp. (Tc)
c.f. (IIIA) or (IIIB); and films have improved cling and low hexane
extractables. The optical properties (clarity, haze) and modulus of
thermo formed prods. are also improved
Dwg.0/2
FILE SEGMENT: CPI
FIELD AVAILABILITY: AB
MANUAL CODES: CPI: A02-A06; A04-G02A; A04-G02B; A07-A02D;
A11-A03; F01-D05
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