US4385164A
Expired / Lapsed
US
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Block copolymer dispersion stabilizer and aqueous dispersion polymerization therewith
Assignee: Goodyear Tire and Rubber Co
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Filing: 1979-11-08
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Granted: 1983-05-24
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Expires: 1999-11-08
Abstract
Abstract A block copolymer dispersion stabilizer for use in the aqueous dispersion polymerization of an ethylenically unsaturated monomer comprises at least two blocks linked by chemical valences. At least one of the blocks is hydrophilic (water soluble) and at least another of said blocks is hydrophobic (water insoluble). The hydrophobic block can contain a plurality of similar or dissimilar pendent groups having chemically reactive functionality. Examples of such groups are epoxy groups and ethylenically unsaturated bonds. An aqueous dispersion polymerization process utilizes water as the dispersion medium, a free-radical polymerization catalyst, a block copolymer dispersion stabilizer comprising at least two blocks linked by chemical valences wherein at least one of said blocks is hydrophilic and at least another of said blocks is hydrophobic and can contain a plurality of similar or dissimilar pendent groups having chemically reactive functionality, and a polymerizable ethylenically unsaturated monomer such as, for example, styrene, vinyl acetate, acrylonitrile, methyl methacrylate, butadiene, styrenebutadiene mixtures, and acrylonitrile-styrene mixtures.
Inventors
- 👤 Richard G. Sinclair
- 👤 David L. Berry
- 👤 George E. Cremeans
- 👤 Richard A. Markle
- 👤 Wesley M. Germon, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:58
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04; C08F2/00; C08F2/12; C08F2/16; C08F2/18; C08F2/20; C08L; C08L57/00
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
123 words
In a process for the polymerization of an ethylenically unsaturated monomer in water as the only polymerization medium and in the presence of a catalyst for the polymerization of said monomer, the improvement which comprises carrying out the polymerization in the presence of a block copolymer dispersion stabilizer which comprises at least two blocks linked by chemical valences wherein at least one of said blocks is a methoxy poly(ethylene oxide)methacrylate and at least another of said blocks is a poly(t-butyl styrene) containing pendent epoxy groups, and wherein the methoxy poly(ethylene oxide)methacrylate block comprises about 80 to about 90 percent by weight of the block copolymer and the poly(t-butyl styrene) block comprises about 10 to about 20 percent by weight of the block copolymer.
Claim 2
Dependent Claim
123 words
In a process for the polymerization of an ethylenically unsaturated monomer in water as the only polymerization medium and in the presence of a catalyst for the polymerization of said monomer, the improvement which comprises carrying out the polymerization in the presence of a block copolymer dispersion stabilizer which comprises at least two blocks linked by chemical valences wherein at least one of said blocks is a methoxy poly(ethylene oxide)methacrylate and at least another of said blocks is a poly(t-butyl styrene) containing pendent epoxy groups, and wherein the methoxy poly(ethylene oxide)methacrylate block comprises about 80 to about 90 percent by weight of the block copolymer and the poly(t-butyl styrene) block comprises about 10 to about 20 percent by weight of the block copolymer.
Claim 3
Dependent Claim
123 words
In a process for the polymerization of an ethylenically unsaturated monomer in water as the only polymerization medium and in the presence of a catalyst for the polymerization of said monomer, the improvement which comprises carrying out the polymerization in the presence of a block copolymer dispersion stabilizer which comprises at least two blocks linked by chemical valences wherein at least one of said blocks is a methoxy poly(ethylene oxide)methacrylate and at least another of said blocks is a poly(t-butyl styrene) containing pendent double bonds, and wherein the methoxy poly(ethylene oxide)methacrylate block comprises about 80 to about 90 percent by weight of the block copolymer and the poly(t-butyl styrene) block comprises about 10 to about 20 percent by weight of the block copolymer.
Claim 4
Dependent Claim
123 words
In a process for the polymerization of an ethylenically unsaturated monomer in water as the only polymerization medium and in the presence of a catalyst for the polymerization of said monomer, the improvement which comprises carrying out the polymerization in the presence of a block copolymer dispersion stabilizer which comprises at least two blocks linked by chemical valences wherein at least one of said blocks is a methoxy poly(ethylene oxide)methacrylate and at least another of said blocks is a poly(t-butyl styrene) containing pendent double bonds, and wherein the methoxy poly(ethylene oxide)methacrylate block comprises about 80 to about 90 percent by weight of the block copolymer and the poly(t-butyl styrene) block comprises about 10 to about 20 percent by weight of the block copolymer.
Claim 5
Dependent Claim
146 words
In a process for the polymerization of an ethylenically unsaturated monomer in water as the only polymerization medium and in the presence of a redox catalyst system consisting of sodium formaldehyde sulfoxylate, ferrous sulfate and para-menthane hydroperoxide, the improvement which comprises carrying out the polymerization in the presence of about 0.1 to about 10 percent by weight based on the weight of the monomer of a block copolymer dispersion stabilizer which comprises at least two blocks linked by chemical valences wherein at least one of said blocks is a methoxy poly(ethylene oxide)methacrylate and at least another of said blocks is a poly(t-butyl styrene) containing pendent ethylenically unsaturated bonds, and wherein the methoxy poly(ethylene oxide)methacrylate block comprises about 80 to about 90 percent by weight of the block copolymer and the poly(t-butyl styrene) block comprises about 10 to about 20 percent by weight of the block copolymer.
Claim 6
Dependent Claim
146 words
In a process for the polymerization of an ethylenically unsaturated monomer in water as the only polymerization medium and in the presence of a redox catalyst system consisting of sodium formaldehyde sulfoxylate, ferrous sulfate and para-menthane hydroperoxide, the improvement which comprises carrying out the polymerization in the presence of about 0.1 to about 10 percent by weight based on the weight of the monomer of a block copolymer dispersion stabilizer which comprises at least two blocks linked by chemical valences wherein at least one of said blocks is a methoxy poly(ethylene oxide)methacrylate and at least another of said blocks is a poly(t-butyl styrene) containing pendent ethylenically unsaturated bonds, and wherein the methoxy poly(ethylene oxide)methacrylate block comprises about 80 to about 90 percent by weight of the block copolymer and the poly(t-butyl styrene) block comprises about 10 to about 20 percent by weight of the block copolymer.
Claim 7
Dependent Claim
12 words
A process according to claim 3 wherein the monomer is vinyl acetate.
Claim 8
Dependent Claim
11 words
A process according to claim 3 wherein the monomer is acrylonitrile.
Claim 9
Dependent Claim
12 words
A process according to claim 3 wherein the monomer is methyl methacrylate.
Claim 10
Dependent Claim
11 words
A process according to claim 3 wherein the monomer is butadiene.
Claim 11
Dependent Claim
14 words
A process according to claim 3 wherein the monomer is an 85/15 styrene/butadiene mixture.
Claim 12
Dependent Claim
14 words
A process according to claim 3 wherein the monomer is an 85/15 acrylonitrile/styrene mixture.
Claim 13
Dependent Claim
14 words
A process according to claim 3 wherein the monomer is a 25/75 styrene/butadiene mixture.
Claim 14
Dependent Claim
11 words
A process according to claim 3 wherein the monomer is isoprene.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-05-23 | 1986-11-22 | 1987-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-23 | 1990-11-22 | 1991-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-23 | 1994-11-22 | 1995-05-24 | $7700.00 | Window Closed / Lapsed |