US4857615A
Expired / Lapsed
US
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Method of making condensed phase polymers
Assignee: 3M Co
•
Filing: 1987-10-09
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Granted: 1989-08-15
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Expires: 2007-10-09
Abstract
Abstract The present invention relates to a method of making elastomeric copolymers and block copolymers, e.g., based upon styrene/isoprene, having a novel condensed phase structure wherein polymer branches occur along the polymer backbone, either at a predetermined location or at random locations. The method comprises the step of reacting, under polymerization conditions, hydrocarbyl lithium initiator, at least one anionically polymerizable compound, and an organometallic- substituted styrene condensing agent. The reactants may be added simultaneously to produce a copolymer with polymer branch segments randomly located along the polymer backbone or sequentially to produce a copolymer with branches located at the same predetermined location along the polymer backbone. The resultant polymers may be further reacted with a linking agent to form multi-arm copolymers.
Inventors
- 👤 William R. Bronn
- 👤 Spencer F. Silver
- 👤 Eugene G. Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:34
CPC Classifications
C; C08; C08F; C08F297/00; C08F297/02; C08F297/04; C08F297/046; C09; C09J; C09J153/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
185 words
A method of preparing an elastomeric copolymer having a condensed phase structure wherein polymer branches occur along a polymer backbone, said method comprising the step of reacting, under polymerization conditions, the following: (a) hydrocarbyl lithium initiator; (b) at least one anionically polymerizable compound; and (c) a condensing agent having the general formula CH.sub.2 ═C(R')QY(R).sub.n (X).sub.m wherein Y is a tetravalent Si, Ge, Sn, or Pb; X is H, --OR", Cl Br or F, wherein R" is a monovalent lower alkyl group having from 1 to 6 carbon atoms; R is hydrogen, a monovalent lower alkyl group having from 1 to 6 carbon atoms, or phenly; Q is phenylene; R' is hydrogen, a monovalent lower alkyl group having from 1 to 6 carbon atoms, or phenyl; m is an interger of 1, 2 or 3; and n is an interger equal to 3-m; in a mole ratio (a) to (c) of about (1+m):1 to form a condensed phase copolymer and wherein the mole percentage of the condensing agent in each copolymer segment containing said condensing agent is in the range of about 0.01% to about 5%.
Claim 2
Independent Claim
185 words
A method of preparing an elastomeric copolymer having a condensed phase structure wherein polymer branches occur along a polymer backbone, said method comprising the step of reacting, under polymerization conditions, the following: (a) hydrocarbyl lithium initiator; (b) at least one anionically polymerizable compound; and (c) a condensing agent having the general formula CH.sub.2 ═C(R')QY(R).sub.n (X).sub.m wherein Y is a tetravalent Si, Ge, Sn, or Pb; X is H, --OR", Cl Br or F, wherein R" is a monovalent lower alkyl group having from 1 to 6 carbon atoms; R is hydrogen, a monovalent lower alkyl group having from 1 to 6 carbon atoms, or phenly; Q is phenylene; R' is hydrogen, a monovalent lower alkyl group having from 1 to 6 carbon atoms, or phenyl; m is an interger of 1, 2 or 3; and n is an interger equal to 3-m; in a mole ratio (a) to (c) of about (1+m):1 to form a condensed phase copolymer and wherein the mole percentage of the condensing agent in each copolymer segment containing said condensing agent is in the range of about 0.01% to about 5%.
Claim 3
Dependent Claim
24 words
The method of claim 1 wherein said anionically polymerizable compound is selected from the group consisting of conjugated diene monomer and vinyl aromatic monomer.
Claim 4
Dependent Claim
20 words
The method of claim 2 wherein said conjugated diene is selected from the group consisting of butadiene, isoprene, and piperylene.
Claim 5
Dependent Claim
11 words
The method of claim 2 wherein said conjugated diene is isoprene.
Claim 6
Dependent Claim
23 words
The method of claim 2 wherein said vinyl aromatic monomer is selected form the group consisting of styrene, alpha-methylstyrene, para-methylstyrene, and t-butyl styrene.
Claim 7
Dependent Claim
29 words
The method of claim 1 wherein said condensing reagent has the general formula CH 2 ═C(H)QSi(CH 3 ) n (X) m where X is F, Cl, Br, or methoxy.
Claim 8
Dependent Claim
17 words
The method of claim 6 wherein X is selected from the group consisting of F and Cl.
Claim 9
Dependent Claim
29 words
The method of claim 1 wherein said copolymer is prepared by simultaneously reacting said hydrocarbyl lithium initiator, polymerizable compound and condensing reagent to form a living condensed phase copolymer.
Claim 10
Dependent Claim
13 words
The method of claim 8 wherein said polymerizable compound is a conjugated diene.
Claim 11
Dependent Claim
20 words
The method of claim 9 wherein said conjugated diene is selected from the group consisting of butadiene, isoprene, and piperylene.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-08-14 | 1993-02-13 | 1993-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-14 | 1997-02-13 | 1997-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-14 | 2001-02-13 | 2001-08-15 | $7700.00 | Window Closed / Lapsed |