Process to prepare aluminoxanes

Patent metadata

Field	Value
Publication number	US-10323047-B2
Application number	US-201615568507-A
Country	US
Kind code	B2
Filing date	Apr 21, 2016
Priority date	Apr 24, 2015
Publication date	Jun 18, 2019
Grant date	Jun 18, 2019

Abstract

The present invention relates to a process to prepare alkylaluminoxanes by reaction of alkylaluminium with methacrylic acid or a conjugated unsaturated carbonyl-functional compound of the formula (I) wherein each R1 and R2 independently are an aliphatic hydrocarbon group, and R3 independently is the same hydrocarbon group as R1 and R2 or a hydrogen atom, and R4 isanaliphatic hydrocarbon group, a hydroxyl group or a hydrogen atom in the presence of an inert organic solvent. Additionally, it relates to the alkylaluminoxanes obtainable by the above process and their use.

First claim

The invention claimed is:

1. Process to prepare alkylaluminoxanes by reaction of alkylaluminium with methacrylic acid or a conjugated unsaturated carbonyl-functional compound of the formula (I)

wherein each R1 and R2 independently are an aliphatic hydrocarbon group, and R3 independently is a hydrocarbon group like R1 and R2 or a hydrogen atom, and R4 is an aliphatic hydrocarbon group, a hydrogen atom or a hydroxyl group
in a ratio of 0.1 to 0.8 molar equivalent oxygen atoms in the part C═O(R4) of the methacrylic acid or conjugated unsaturated carbonyl-functional compound to 1 equivalent of aluminium atoms in the alkylaluminium reactant, and in the presence of an inert organic solvent.

2. Process of claim 1 wherein each R1 and R2 independently are a branched or unbranched aliphatic alkyl or alkylene group of up to 20 carbon atoms, and wherein R3 independently is a branched or unbranched aliphatic alkyl or alkylene group of up to 20 carbon atoms or a hydrogen atom, and R4 independently is a branched or unbranched aliphatic alkyl or alkylene group of up to 20 carbon atoms, a hydrogen atom, or a hydroxyl group.

3. Process of claim 1 wherein methacrylic acid or one of the conjugated unsaturated carbonyl-functional compounds from the group of 3-methyl-2-butenoic acid, 2-methyl-2-propenoic acid, 4-methyl-3-pentene-2-one, 3-methyl-2-butenal is used.

4. Process of claim 1 wherein the alkylaluminium is a trialkylaluminium wherein the alkyl groups are alkyl groups of up to 8 carbon atoms.

5. Process of claim 4 wherein one or more of the alkyl groups on the alkylaluminium are selected from the group consisting of isobutyl, ethyl and methyl either individually or in combinations thereof.

6. Process of claim 1 wherein the alkylaluminium is a compound wherein at least 50% of the alkyl groups are methyl.

7. Process of claim 1 wherein the alkylaluminium contains trimethylaluminium.

8. Process of claim 1 wherein the organic solvent is selected from the group consisting of alkanes and aromatics, either individually or in combinations thereof.

9. Process of claim 1 wherein the reaction of alkylaluminium with a methacrylic acid or conjugated unsaturated carbonyl-functional compound is performed in the presence of an aluminoxane.

10. Process of claim 1 wherein the inert organic solvent contains a carrier.

11. Process of claim 10 wherein the carrier is selected from the group consisting of silica, magnesia, titania, zirconia, montmorillonite, phyllosilicate, alumina, silica-alumina, silica-chromium, silica-titania, magnesium chloride, graphite, and combinations thereof.

12. Process of claim 1 wherein the organic solvent is an alkane selected from the group consisting of heptanes and hexanes either individually or in combinations thereof.

13. Process of claim 1 wherein the organic solvent is an aromatic selected from the group consisting of toluene, xylene, ethylbenzene, cumene and mesitylene either individually or in combinations thereof.

Assignees

• Akzo Nobel Chemicals Int Bv

Inventors

• Bergsma Jelle Martin
• Van Der Kruijs Peter
• Woudenberg Richard Herman

Classifications

• B01J2231/12

  Olefin polymerisation or copolymerisation · CPC title

• C08F10/00

  Homopolymers and copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond · CPC title

• C07C2531/14

  of aluminium or boron · CPC title

• C07C2/30

  containing metal-to-carbon bond; Metal hydrides · CPC title

• C07F5/068 Primary

  preparation of alum(in)oxanes · CPC title