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Most Cited Patent Families 1999-Chemistry and Related

Following is a CAS database record representing a highly cited patent family.

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CAS indexed 12 chemical substances from this document. CAS subject entries for this document include: Polymerization; 1,3-Butadiene 4polymer with ethenylbenzene, functionally-terminated ; 1,3-Butadiene 2-methyl- $homopolymer, functionally-terminated ; and 5 additional concepts.

CAPLUS COPYRIGHT 2001 ACS

TITLE:	Graft copolymers
INVENTOR(S):	Milkovich, Ralph; Chiang, Mutong T.; Schulz, Gerald O.
PATENT ASSIGNEE(S):	CPC International Inc.
SOURCE:	Ger. Offen., 162 pp. CODEN: GWXXBX
LANGUAGE:	German

PATENT INFORMATION:

PATENT NO.       KIND  DATE           APPLICATION NO.  DATE
---------------  ----  --------       ---------------  --------
DE 2318809        A1   19731031       DE 1973-2318809  19730413
DE 2318809        C2   19870806
US 3832423        A    19740827       US 1972-244205   19720414
US 3786116        A    19740115       US 1972-282099   19720821
GB 1432782        A    19760422       GB 1973-14516    19730326
GB 1432783        A    19760422       GB 1975-34683    19730326
ZA 7302134        A    19740227       ZA 1973-2134     19730328
CA 1037636        A1   19780829       CA 1973-167581   19730330
US 3862267        A    19750121       US 1973-347040   19730402
SE 417101         B    19810223       SE 1973-5227     19730412
SE 417101         C    19810611
BE 798165         A1   19730731       BE 1973-2052684  19730413
NL 7305190        A    19731016       NL 1973-5190     19730413
NL 164866         B    19800915NL 164866         C    19810216
FR 2197908        A1   19740329       FR 1973-13452    19730413
FR 2197908        B1   19790209
DD 108102         C    19740912       DD 1973-170213   19730413
IT 982767         A    19741021       IT 1973-23012    19730413
DD 111685         C    19750312       DD 1973-179410   19730413
ES 413669         A1   19760716       ES 1973-413669   19730413
AT 7303294        A    19770215       AT 1973-3294     19730413
AT 339592         B    19771025
CH 606120         A    19781013       CH 1973-5363     19730413
SU 694078         D    19791025       SU 1973-1907451  19730413
JP 49030462       A2   19740318       JP 1973-41850    19730414
JP 54010996       B4   19790511
CS 194160         P    19791130       CS 1973-2680     19730414
CS 194178         P    19791130       CS 1976-4737     19730414
CS 194179         P    19791130       CS 1976-4738     19730414
US 3862097        A    19750121       US 1973-376081   19730702
US 3862102        A    19750121       US 1973-376107   19730702
US 3862101        A    19750121       US 1973-376030   19730702
US 3862098        A    19750121       US 1973-376109   19730702
US 3862077        A    19750121       US 1973-385500   19730803
SU 671734         D    19790630       SU 1975-2119508  19750403
US 4085168        A    19780418       US 1975-575286   19750507
ES 439947         A1   19770301       ES 1975-439947   19750801
JP 51125186       A2   19761101       JP 1975-147483   19751212
JP 53045358       B4   19781206
SE 7605560        A    19760514       SE 1976-5560     19760514
SE 425396         B    19820927SE 425396         C    19830113

ABSTRACT:
Graft copolymers with good phys. properties were prepd. by polymn. of a diisocyanate or monomer contg. 1 or 2 olefinic bonds (9 used) with a polymer (several prepd.), contg. .geq.20-30 monomer units, modified on 1 end with an olefinic or hydroxy group with wt. av. mol. wt. (.vin.Mw)-no. av. mol. wt. (.vin.Mn) ratio <1:1. Thus, a 12% hexane-BuLi soln. was added to 2500 ml THF contg. 472 g .alpha.-methylstyrene until a red color appeared and 30 ml addnl. hexane-BuLi was added with appearance of a yellow color. Allyl chloride (4.5 %) was added to this soln. at -80.deg. in 30 min. to give butyl-allyl-terminated poly(.alpha.-methylstyrene) (I) [25014-31-7] of mol. wt. 11,000 and .vin.Mw/.vin.Mw < 1.05. Cyclohexane-heptane contg. I, Et2AlCl, and VOCl3 was treated with 30 psig ethylene 1 hr at 30.deg. to give .alpha.-methylstyrene-ethylene graft copolymer [50979-00-5] which was pressed to a transparent, tough, flexible film.