Process for graft polymerization
AssigneeExxon Research & Engineering Co.
InventorsJoseph P. Kennedy, Francis P. Baldwin
Life of this patent
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Abstract
Aluminum trialkyl and aluminum dialkyl monohalide catalysts can be used to graft cationically polymerizable monomers, such as styrene, chloroprene, isobutylene, etc. to halogenated polymers with some highly reactive halogen atoms such as PVC, neoprene, chlorobutyl, etc.
Claims23
A graft polymer comprising a cationically polymerizable monomer grafted to a halogen containing polymer backbone wherein said halogen containing polymer is a substantially saturated polymer containing before grafting at least 0.01 mole % reactive halogen, said monomer being polymerized and grafted to the backbone at the original location of said reactive halogen.
A graft polymer comprising a cationically polymerizable monomer grafted to a polymer backbone wherein said polymer is polychloroprene, halogenated polyisoprene, halogenated polybutadiene, halogenated polypropylene or halogenated butyl rubber;
- said polymer containing in its structure at least 0.01 mole percent of a reactive halogen and said monomer is propene, 1-pentene, 2-ethyl-1-hexane, butadiene, isoprene, chloroprene, dimethylbutadiene, piperylene, cyclopentadiene, beta-pinene or methylene norborene;
- said monomer being polymerized and grafted to the backbone at the original location of said halogen.
A process for preparing a graft copolymer which comprises reacting a cationically polymerizable monomer selected from the group consisting of styrene, .alpha.methyl styrene;
- p-chlorostyrene, isobutene, propene, 1-pentene, vinylalkyl ether and 2-ethyl-1-hexene with a reactive halogen containing, substantially saturated, hydrocarbon polymer having at least six repeating monomer units in the presence of a catalyst consisting essentially of a compound having the general formula AlM.sub.2 R wherein M is a C.sub.1 to C.sub.12 alkyl radical and R is M, hydrogen or halogen, wherein said polymer is the backbone of said graft copolymer, said reaction being carried out on an inert solvent at a temperature of about -90.degree. to about +70.degree.C.
A process of preparing a graft copolymer which comprises reacting a cationically polymerizable monomer selected from the group consisting of styrene, .alpha.methyl styrene, t-butylstyrene, p-chlorostyrene, isobutylene, 1-pentene, 2-ethyl-1-hexene, butadiene, isoprene, chloroprene, dimethylbutadiene, piperylene, cyclopentadiene, cyclohexadiene, beta-pinene and methylene norbornene with a reactive halogen containing substantially saturated hydrocarbon polymer wherein said polymer is polyvinyl chloride, polyvinyllidene chloride, polyvinyl bromide, polyvinyl floride, halogenated polyethylene, halogenated polypropylene, halogenated ethylene-propylene rubber, halogenated poly-t-butylstyrene or halogenated polyvinyl toluene in the presence of a catalyst consisting essentially of a compound having the general formula AlM.sub.2 R wherein M is a C.sub.1 -C.sub.12 alkyl radical and R is M, hydrogen or halogen, wherein said polymer is the backbone of said graft copolymer, said reaction being carried out at at temperature of about -90.degree. to about +70.degree.C.
A graft copolymer comprising a cationically polymerizable monomer selected from the groups consisting of styrene, methyl styrene, p-chlorostyrene, isobutylene, 1-pentene, 2-ethyl-1-hexene, isoprene, chloroprene butadiene, dimethyl butadiene, piperylene cyclopentadiene, beta-pinene and methylene norbornene with a reactive halogen containing polymer wherein said polymer is polychloroprene, halogenated polyisoprene, halogenated polybutadiene, halogenated polypiperylene and halogenated butyl rubber said cationically polymerizable monomer being polymerized and grafted to the polymer at the original location of said halogen.
Dependencies are inferred from the claim text.