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Primary Examiner: Smith, Edward J.
Assistant Examiner:
Attorney: Cushman, Darby & Cushman

Next ten patents ordered by date:

Cyanocarboxylate polymers and their process of manufacture
Method for selectively guiding and limiting the reactions of hydroxyl compounds
Penicillins
6.beta.,17-Dihydroxy-7.alpha.-(lower alkoxy)carbonyl-3-oxo-17.alpha.-pregn-4-ene-21-carboxylic acid .gamma.-lactones and congeners
6-[.alpha.-(.omega.-Guanidinoalkanoylamido)acylamido]penicillanic acids
Certain pyrido[3,2-e]1,4-diazepinones and derivatives
Method for preparing symmetrical and unsymmetrical ketazines and mixtures thereof
Hydroxybenzylidene iminophenyl-benzothiazoles
Process for the preparation of symmetrical and unsymmetrical azines and mixtures thereof
Method for preparing azines and hydrazones

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Title: Polymerization process

Abstract: An olefine polymerization catalyst includes a complex compound of phosphorus having the general formula ##EQU1## where the various groups are defined. Typical phosphorus compounds include ##EQU2## Catalyst systems containing these phosphorus compounds give a high rate of polymerization together with a low proportion of soluble polymer. The phosphorus compound can be ball-milled with the titanium compound to give an improved effect and the catalyst system may also include an electron donor compound such as triphenylphosphine oxide and tris(dimethylamino)silicon monochloride or a cyclic polyene such as cycloheptatriene.

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Inventors: Fortuin, Michael Stanley (St. Albans, EN)
Caunt, Anthony David (Welwyn Garden City, EN)

Application Number: 416495
Filing Date: 1973-11-16
Publication_date: 1976-08-03
Assignee: Imperial Chemical Industries Limited (London, EN)
Primary Class(es): 526/77 502/114, 502/115, 502/121, 526/139, 526/159, 526/193, 526/351, 526/352, 558/81, 558/93, 562/878, 564/13, 564/14
Other Classes:
US Patent Ref:

3264324	Aug, 1966	Gould et al.	260/347.
3415801	Dec, 1968	Coover et al.	260/94.
3484424	Dec, 1969	Moberly	260/94.
3502634	Mar, 1970	Stedefeder et al.	260/94.
3534006	Oct, 1970	Kamaishi et al.	260/93.
3558586	Jan, 1971	Fodor	260/93.
3629222	Dec, 1971	Coover et al.	260/93.
3639375	Feb, 1972	Staiger et al.	260/94.
3644320	Feb, 1972	Sugiura et al.	260/93.
3701763	Oct, 1972	Wada et al.	260/94.
3721721	Mar, 1973	Maemoto et al.	252/431.
3752797	Aug, 1973	Gordon et al.	260/94.
3766160	Oct, 1973	Caunt	260/94.

Other Refs: 4,624,2464,539,621448,516954,0711,002,3211,015,201

Jul, 1971	JA.
Dec, 1970	JA.
Apr, 1969	JA.
Apr, 1964	UK.
Aug, 1965	UK.
Dec, 1965	UK.

Other References: Inorg. Nucl. Chem. Letters vol. 1, (1965), pp. 75-76.
Chemical Abstracts, vol. 73, (1970), 77342.
Chemical Abstracts, vol. 74, (1971), 87032.