EP0314256A2
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Method for preparing asymmetric radial copolymers
Assignee: Shell Internationale Research Maatschappij BV
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Filing: 1988-10-28
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Granted: —
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Expires: 2008-10-28
Abstract
Abstract A method for preparing asymmetric radial polymers wherein the different polymeric arms are contacted sequentially with a coupling agent. The method narrows the relative arm distribution of the several asymmetric radial polymers produced and significantly increases the amount of total product having the desired ratio of polymeric arms. Any coupling agent known in the prior art to be useful in the production of asymmetric radial polymers may be used in the method of this invention but coupling agents having from three to about twelve functional groups are most effective.
Inventors
- 👤 Ronald James Hoxmeier
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 02:36
CPC Classifications
C; C08; C08G; C08G81/00; C08G81/02; C08G81/021; C08G81/022; C08C; C08C19/00; C08C19/30; C08C19/42; C08C19/44
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
133 words
A method for preparing an asymmetric radial polymer comprising the steps of: (a) contacting a first polymer having a single reactive end group with a coupling agent containing a plurality of functional groups which will react with the reactive end group, the amount of said first polymer being substantially stoichiometrically corresponding with a part of the total amount of the functional groups, in such a way that the reaction between said first polymer and coupling agent proceeds substantially to completion; (b) contacting in subsequent steps one or more polymers, being different from said first polymer and from each other and having a reactive end group, with the respective reaction product from each preceding step until all functional groups of the coupling agent have finally completely reacted; (c) recovering the obtained asymmetric radial polymer.
Claim 2
Independent Claim
133 words
A method for preparing an asymmetric radial polymer comprising the steps of: (a) contacting a first polymer having a single reactive end group with a coupling agent containing a plurality of functional groups which will react with the reactive end group, the amount of said first polymer being substantially stoichiometrically corresponding with a part of the total amount of the functional groups, in such a way that the reaction between said first polymer and coupling agent proceeds substantially to completion; (b) contacting in subsequent steps one or more polymers, being different from said first polymer and from each other and having a reactive end group, with the respective reaction product from each preceding step until all functional groups of the coupling agent have finally completely reacted; (c) recovering the obtained asymmetric radial polymer.
Claim 3
Dependent Claim
106 words
A method of claim 1 comprising the steps of: (a) contacting a first polymer having a single reactive end group with a coupling agent containing a plurality of functional groups which will react with the reactive end group such that reaction between said first polymer and the coupling agent proceeds substantially to completion; (b) contacting a second polymer, which second polymer is different from said first polymer, having a reactive end group with the reaction product from step (a) under conditions such that reaction between said second polymer and the reaction product from step (a) proceeds substantially to completion; and (c) recovering an asymmetric radial polymer.
Claim 4
Independent Claim
18 words
The method of claims 1 and 2, wherein the coupling agent comprises from three to twelve functional groups.
Claim 5
Independent Claim
27 words
The method of claims 1-3, wherein said first polymer is the polymer intended, on average, to form the greater number of arms in the asymmetric radial polymer.
Claim 6
Independent Claim
13 words
The method of claims 1-4, wherein said coupling agent contains four functional groups.
Claim 7
Independent Claim
12 words
The method of claims 1-5, wherein said coupling agent is silicon tetrachloride.
Claim 8
Independent Claim
39 words
The method of claims 1-6, wherein the polymers used to form the arms are polymers containing only polymerized conjugated diolefins and block copolymers comprising at least one monoalkenyl aromatic hydrocarbon polymer block and at least one conjugated diolefin block.
Claim 9
Independent Claim
24 words
The method of claims 1-7, wherein the ratio of conjugated diolefin arms to block copolymer arms is within the range from 1:3 to 3:1.
Claim 10
Independent Claim
53 words
The method of claims 1-8, wherein said conjugated diolefin arms are a homopolymer of a conjugated diolefin selected from the group consisting of butadiene and isoprene, said monoalkenyl aromatic hydrocarbon is styrene and the conjugated diolefin block is a homopolymer of a conjugated diolefin selected from the group consisting of butadiene and isoprene.
Claim 11
Independent Claim
27 words
The method of claims 1-9, wherein said first polymer is a living polybutadiene and said second polymer is a polystyrene block and at least one polyisoprene block.
Claim 12
Dependent Claim
130 words
An asymmetric radial polymer prepared with a method comprising the steps of: (a) contacting a first polymer having a single reactive end group with a coupling agent containing a plurality of functional groups which will react with the reactive end group, the amount of said first polymer being substantially stoichiometrically corresponding with a part of the total amount of the functional groups, such that the reaction between said first polymer and coupling agent proceeds substantially to completion; (b) contacting in subsequent steps one or more polymers being different from said first polymer and from each other and having a reactive end group, with the reaction product from each preceding step, until all functional groups of the coupling agent have substantially completely reacted; and (c) recovering the obtained asymmetric radial polymer.
Claim 13
Dependent Claim
130 words
An asymmetric radial polymer prepared with a method comprising the steps of: (a) contacting a first polymer having a single reactive end group with a coupling agent containing a plurality of functional groups which will react with the reactive end group, the amount of said first polymer being substantially stoichiometrically corresponding with a part of the total amount of the functional groups, such that the reaction between said first polymer and coupling agent proceeds substantially to completion; (b) contacting in subsequent steps one or more polymers being different from said first polymer and from each other and having a reactive end group, with the reaction product from each preceding step, until all functional groups of the coupling agent have substantially completely reacted; and (c) recovering the obtained asymmetric radial polymer.
Claim 14
Dependent Claim
106 words
An asymmetric radial polymer prepared with a method comprising the steps of: (a) contacting a first polymer having a single reactive end group with a coupling agent containing a plurality of functional groups which will react with the reactive end group such that reaction between the polymer and coupling agent proceeds substantially to completion; (b) contacting a second polymer, which polymer is different from said first polymer, having a reactive end group with the reaction product from step (a) under conditions such that reaction between said second polymer and the reaction product from step (a) proceeds substantially to completion; and (c) recovering an asymmetric radial polymer.
Claim 15
Dependent Claim
106 words
An asymmetric radial polymer prepared with a method comprising the steps of: (a) contacting a first polymer having a single reactive end group with a coupling agent containing a plurality of functional groups which will react with the reactive end group such that reaction between the polymer and coupling agent proceeds substantially to completion; (b) contacting a second polymer, which polymer is different from said first polymer, having a reactive end group with the reaction product from step (a) under conditions such that reaction between said second polymer and the reaction product from step (a) proceeds substantially to completion; and (c) recovering an asymmetric radial polymer.
Claim 16
Dependent Claim
20 words
The asymmetric radial polymer of claims 11 and 12, wherein the coupling agent comprises from three to twelve functional groups.
Claim 17
Dependent Claim
29 words
The asymmetric radial polymer of claims 11-13, wherein said first polymer is the polymer intended, on average, to form the greater number of arms in the asymmetric radial polymer.
Claim 18
Dependent Claim
15 words
The asymmetric radial polymer of claims 11-14, wherein said coupling agent contains four functional groups.
Claim 19
Dependent Claim
14 words
The asymmetric radial polymer of claims 11-15, wherein said coupling agent is silicon tetrachloride.
Claim 20
Dependent Claim
41 words
The asymmetric radial polymer of claims 11-16, wherein the polymers used to form the arms are polymers containing only polymerized conjugated diolefins and block copolymers comprising at least one monoalkenyl aromatic hydrocarbon polymer block and at least one conjugated diolefin block.
Claim 21
Dependent Claim
26 words
The asymmetric radial polymer of claims 11-17, wherein the ratio of conjugated diolefin arms to block copolymer arms is within the range from 1:3 to 3:1.
Claim 22
Dependent Claim
55 words
The asymmetric radial polymer of claims 11-18, wherein said conjugated diolefin arms are a homopolymer of a conjugated diolefin selected from the group consisting of butadiene and styrene, said monoalkenyl aromatic hydrocarbon is styrene and the conjugated diolefin block is a homopolymer of a conjugated diolefin selected from the group consisting of butadiene and isoprene.
Claim 23
Dependent Claim
41 words
The asymmetric radial polymer of claims 11-19, wherein the polymer used in step (a) is a living polybutadiene and the polymer used in step (b) is a block copolymer comprising at least one polystyrene block and at least one polybutadiene block.
Claim 24
Dependent Claim
36 words
The asymmetric radial polymer of claims 11-20, wherein said first polymer is a homopolymer of isoprene and said second polymer is a block copolymer comprising at least one polystyrene block and at least one polyisoprene block.
Claim 25
Dependent Claim
21 words
An asymmetric radial polymer containing at least 50 %wt of asymmetric radial molecules having the desired ratio of polymeric arms therein.
Claim 26
Dependent Claim
21 words
An asymmetric radial polymer containing at least 50 %wt of asymmetric radial molecules having the desired ratio of polymeric arms therein.
References Cited (Backward Citations)
No citation records indexed.
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