Incorporation of functional groups in polymers
AssigneeAristech Chemical Corporation
InventorsAndrew J. Sivak, Leonard A. Cullo
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Abstract
New polymers are disclosed to be made in supported Ziegler-Natta systems. They include monomers exhibiting polar functionality such as through a hydroxyl group or other functional group protected during polymerization in the presence of highly active catalysts by the use of a protective alkyl silane group which is removed after polymerization to restore the functionality of the group. The typical polymer thus made is a polyolefin having functional groups on its backbone; the functional groups may be reacted with conventional dyes and/or may perform other functions and enter reactions with other reactive compounds.
Claims10
Method of making a stereoregular alpha-olefin polymer having functional groups comprising (a) polymerizing, in the presence of a Ziegler-Natta catalyst comprising a titanium chloride on a magnesium chloride support, monomers including at least one alpha-olefin and at least about 0.01 mole percent silyl-containing monomers of the general formula
- [CH.sub.2 .dbd.CHCH.sub.2 ].sub.y (X)[O.sub.w SiR.sub.4-w ].sub.z
- where y, w, and z are independently 1 or 2, (X) is a connecting hydrocarbyl fragment other than an unsaturated non-cyclic hydrocarbyl, and other than an unsaturated cyclic non-aromatic hydrocarbyl, having from 1 to about 20 carbon atoms, and each R is independently selected from alkyl alkoxy, alicyclic, aryloxy, alkaryl and aryl groups having from 1 to about 20 carbon atoms, provided that the total of carbon atoms in all R's together with all carbons directly attached to the carbon in X connected to an O is at least 5, and (b) hydrolyzing or alcoholyzing the resulting polymeric product.
Method of making a functionalized polymer comprising hydrolyzing or alcoholyzing a stereoregular copolymer of alpha olefins having from 2 to about 10 carbon atoms and including from about 0.05 mole percent to about 50 mole percent mer units derived from silyl-containing monomers of the general formula
- [CH.sub.2 .dbd.CHCH.sub.2 ](C.sub.m H.sub.2m)OSiR.sub.3
- where (C.sub.m H.sub.2m) is an alkyl group and ma is an integer from 1 to about 20, each R is independently selected from alkyl, alkoxy, alicyclic, aryloxy, alkaryl and aryl groups having from 1 to about 20 carbon atoms, and the total of carbon atoms in the three R groups is at least 5, said stereoregular copolymer being made by copolymerizing said alpha olefins and said silyl-containing monomers in the presence of a Ziegler-Natta catalyst comprising a titanium chloride on a magnesium chloride support.
Method of making a functionalized polymer comprising hydrolyzing or alcoholyzing a stereoregular copolymer comprising mer groups derived from at least one alpha olefin and silyl-containing monomers having the general formula ##STR19## where x is the mole fraction of the polymer derived from alpha olefins and is a number from 0.0005 to 0.9995, y is the mole fraction of the polymer derived from silyl-containing monomer and is a number from 0.9995 to 0.0005, x+y is equal to 1, (X) is a connecting multivalent hydrocarbyl fragment other than an unsaturated non-cyclic hydrocarbyl and other than an unsaturated cyclic non-aromatic hydrocarbyl, having about 1 to about 20 carbon atoms, w is either 1 or 2, z is 1 or 2, R.sup.3 is selected from hydrogen and hydrocarbon groups having from 1 to 8 carbon atoms, and the total of carbon atoms in the R.sup.3 's together with all carbon atoms directly attached to the carbon in (X) connected to an O is at least 5.
Dependencies are inferred from the claim text.