EP0045977B1 — Components and catalysts for the polymerization o…

Claim 1

Independent Claim 346 words

A solid component of catalysts for the polymerization of alpha-olefins, comprising an anhydrous Mg-dihalide in active form as essential support, and supported on said dihalide a Ti-compound and an electron-donor compound characterized in that the Ti-compound is selected from Ti-halides or Ti-haloalcoholates and the electron-donor compound is an ester selected from the following groups of compounds: 1.1 Mono and polyesters of saturated polycarboxylic acids wherein at least one of the esteric carbonyl groups is linked to a tertiary or quaternary carbon atom or to a linear or branched chain of at least 4 carbon atoms; 1.2 Mono and polyesters of unsaturated polycarboxylic acids wherein at least two carboxy groups are linked to vicinal double bond-forming carbon atoms and in which at least one of the R hydrocarbyl radicals of the -COOR groups is a branched saturated or unsaturated radical with 3 to 20 carbon atoms or is an aryl or arylalkyl radical with 6 to 20 carbon atoms. 1.3 Mono and diesters of aromatic bicarboxylic acids having the COOH groups in ortho position and wherein at least one of the R hydrocarbyl radicals of the COOR groups contains from 3 to 20 carbon atoms; 1.4 Mono and polyesters of aromatic hydroxy compounds containing at least two hydroxyl groups in ortho position; 1.5 Esters of aromatic hydroxy acids wherein at least a hydroxyl group is in ortho position to the carboxy group; 1.6 Esters of saturated or unsaturated carboxylic acids wherein at least one of the R, R' hydrocarbyl radicals of the R COOR' groups is a saturated or unsaturated branched radical containing from 3 to 20 carbon atoms or is an arylalkyl radical with 7 to 20 carbon atoms or R is an aryl radical with 3 to 20 carbon atoms and in which when the R' radical is a linear hydrocarbyl radical, it contains from 3 to 20 carbon atoms. 1.7 Esters of carbonic acid of formula CO(OR) 2 in which at least one of the R radicals, which can be the same or different, is a hydrocarbyl radical with 3 to 20 carbon atoms.

Claim 2

Dependent Claim 346 words

A solid component of catalysts for the polymerization of alpha-olefins, comprising an anhydrous Mg-dihalide in active form as essential support, and supported on said dihalide a Ti-compound and an electron-donor compound characterized in that the Ti-compound is selected from Ti-halides or Ti-haloalcoholates and the electron-donor compound is an ester selected from the following groups of compounds: 1.1 Mono and polyesters of saturated polycarboxylic acids wherein at least one of the esteric carbonyl groups is linked to a tertiary or quaternary carbon atom or to a linear or branched chain of at least 4 carbon atoms; 1.2 Mono and polyesters of unsaturated polycarboxylic acids wherein at least two carboxy groups are linked to vicinal double bond-forming carbon atoms and in which at least one of the R hydrocarbyl radicals of the -COOR groups is a branched saturated or unsaturated radical with 3 to 20 carbon atoms or is an aryl or arylalkyl radical with 6 to 20 carbon atoms. 1.3 Mono and diesters of aromatic bicarboxylic acids having the COOH groups in ortho position and wherein at least one of the R hydrocarbyl radicals of the COOR groups contains from 3 to 20 carbon atoms; 1.4 Mono and polyesters of aromatic hydroxy compounds containing at least two hydroxyl groups in ortho position; 1.5 Esters of aromatic hydroxy acids wherein at least a hydroxyl group is in ortho position to the carboxy group; 1.6 Esters of saturated or unsaturated carboxylic acids wherein at least one of the R, R' hydrocarbyl radicals of the R COOR' groups is a saturated or unsaturated branched radical containing from 3 to 20 carbon atoms or is an arylalkyl radical with 7 to 20 carbon atoms or R is an aryl radical with 3 to 20 carbon atoms and in which when the R' radical is a linear hydrocarbyl radical, it contains from 3 to 20 carbon atoms. 1.7 Esters of carbonic acid of formula CO(OR) 2 in which at least one of the R radicals, which can be the same or different, is a hydrocarbyl radical with 3 to 20 carbon atoms.

Claim 3

Dependent Claim 39 words

A solid component as defined in claim 1) in which the Mg dihalide is Mg dichloride or Mg dibromide, the Ti halide is a Ti tetrahalide and the ester is selected from the 1.2, 1.3, 1.6 and 1.7 groups.

Claim 4

Dependent Claim 107 words

Catalysts for the polymerization of alpha-olefins comprising the product of reaction of the following components: a) an AI-trialkyl or an AI-alkyl compound containing 2 or more AI atoms linked to each other through an oxygen or nitrogen atom or through S0 4 or S0 3 groups; b) a silicon compound containing one or more Si-OR, Si-OCOR or Si-NR 2 bond, R being a hydrocarbyl radical; c) a solid component as defined in claims 1) to 2); the molar ratio of component b) with respect to the halogenated Ti-compound supported on component c) being of at least 1, and with respect to the AI-alkyl compound less than 20.

Claim 5

Dependent Claim 26 words

Catalysts as defined in claim 3) in which the silicon compound of component b) is a phenyl di- or trialkoxylane or an alkyl di- or trialkoxysilane.

Claim 6

Dependent Claim 20 words

Catalysts as defined in claim 4) in which the component c) is the solid component as defined in claim 2).

Claim 7

Dependent Claim 69 words

Process for the polymerization of alpha-olefins CH 2 =CHR in which R is an alkyl radical with 1 to 4 C, or an aryl radical and mixtures of said olefins with ethylene, characterized in that the polymerization process is carried out in liquid phase in presence or not of an inert hydrocarbon solvent or in gas phase in presence of a catalyst as defined in claims 3) to 5).

Components and catalysts for the polymerization of olefins

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