US4940760A
Expired / Lapsed
US
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Group Transfer Polymerization process employing supported initiators
Assignee: EIDP Inc
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Filing: 1989-10-06
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Granted: 1990-07-10
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Expires: 2009-10-06
Abstract
Abstract Group Transfer Polymerization (GTP) process for preparing a "living" polymer, the process comprising contacting under polymerizing conditions in a polymerization medium, at least one acrylic or maleimide monomer with an initiator which is a tetracoordinate organosilicon, organotin or organogermanium compound having at least one GTP initiating site and a catalyst which is or is a source of an anion selected from the group consisting of bifluoride, fluoride, cyanide, azide or a selected oxyanion, or a selected Lewis acid or Lewis base, the process further characterized in that the initiator or the anion or Lewis acid catalyst is chemically attached (grafted) to a solid support that is insoluble in the polymerization medium.
Inventors
- 👤 Fritz P. Boettcher
- 👤 Ira B. Dicker
- 👤 Richard C. Ebersole
- 👤 Walter R. Hertler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:25
CPC Classifications
C; C08; C08F; C08F4/00; C08F4/42; C12; C12N; C12N15/00; C12N15/09; C12N15/10; C12Q; C12Q1/00; C12Q1/68
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
103 words
Group Transfer Polymerization (GTP) process for preparing a "living" polymer, the process comprising contacting under polymerizing conditions in a polymerization medium, at least one acrylic or maleimide monomer with an initiator which is a tetracoordinate organosilicon, organotin or organogermanium compound having at least one GTP inititaing site and a catalyst which is, or is a source of, an anion selected from the group consisting of bifluoride, fluoride, cyanide, axide or a selected oxyanion, or a selected Lewis acid or Lewis base, the process further characterized in that the initiator is chemically attached to a solid support that is insoluble in the polymerization medium.
Claim 2
Dependent Claim
103 words
Group Transfer Polymerization (GTP) process for preparing a "living" polymer, the process comprising contacting under polymerizing conditions in a polymerization medium, at least one acrylic or maleimide monomer with an initiator which is a tetracoordinate organosilicon, organotin or organogermanium compound having at least one GTP inititaing site and a catalyst which is, or is a source of, an anion selected from the group consisting of bifluoride, fluoride, cyanide, axide or a selected oxyanion, or a selected Lewis acid or Lewis base, the process further characterized in that the initiator is chemically attached to a solid support that is insoluble in the polymerization medium.
Claim 3
Dependent Claim
13 words
Process of claim 1 wherein the support is crosslinked polystyrene or crosslinked polydimethylsiloxane.
Claim 4
Dependent Claim
12 words
Process of claim 1 wherein the initiator is a tetracoordinate organosilicon compound.
Claim 5
Dependent Claim
12 words
Process of claim 3 wherein the initiator is a silyl ketene acetal.
Claim 6
Dependent Claim
13 words
Process of claim 4 wherein the initiator contains at least two initiating sites.
Claim 7
Dependent Claim
15 words
Process of claim 1 wherein the monomer is (meth)acrylonitrile or a (meth)acrylate ester or amide.
Claim 8
Dependent Claim
21 words
Process of claim 6 wherein the ester is methyl methacrylate, N,N-dimethylaminoethyl methacrylate, methyl or ethyl acrylate, and the amide is N,N-dimethylacrylamide.
Claim 9
Dependent Claim
10 words
Process of claim 7 wherein the ester is N,N-dimethylaminoethyl methacrylate.
References Cited (Backward Citations)
US4588795A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-07-09 | 1994-01-08 | 1994-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-09 | 1998-01-08 | 1998-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-09 | 2002-01-08 | 2002-07-10 | $7700.00 | Window Closed / Lapsed |