Patent US4859751A successfully refreshed from Google Patents.
US4859751A
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US
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Process for emulsion polymerization
Assignee: Wacker Chemie AG
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Filing: 1984-10-29
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Granted: 1989-08-22
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Expires: 2004-10-29
Abstract
Abstract A novel process for the preparation of a readily dispersible, pourable dispersion powder comprising emulsion polymerizing in the presence of a free radial initiator a mixture of 1 to 50% by weight of ethylene and 99 to 50% by weight of an ethylenically unsaturated comonomer phase comprising at least one member of the group consisting of (a) 60 to 100% by weight of vinyl chloride, (b) 0 to 40% by weight of monoethylically unsaturated, oil-soluble monomers, (c) 0 to 10% by weight of monoethylenically unsaturated water-soluble monomers having functional groups and (d) 0 to 5% by weight of oil-soluble monomers that are monoethylenically unsaturated and have functional groups or are multiple ethylenically unsaturated and optionally a protective colloid and/or emulsifier at an ethylene pressure of 10 to 150 bar to obtain an aqueous dispersion of a vinyl chloride-ethyelene copolymer, optionally adding to the aqueous dispersion (e) 0 to 40% by weight, based on the VCE-polymer, of at least one water-soluble substance having a Tg>/=60 DEG C., (f) 0 to 1% by weight, based on the VCE-polymer, of an antifoaming agent, and (g) 0 to 30% by weight, based on the total weight of polymer constituents, of a finely divided antiblocking agent and spray drying or freeze drying the aqueous dispersion to obtain the readily redispersible, pourable powder of a vinyl chloride-ethylene copolymer and the powder produced by the said process and improved coatings, paints, glues and adhesives containing the said redispersible powder.
Inventors
- 👤 Joachim Schulze
- 👤 Klaus Adler
- 👤 Manfred Selig
- 👤 Peter Ball
- 👤 Klaus Marquardt
- 👤 Otmar Killermann
- 👤 Manfred Hannebaum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:25
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/12; C08J3/122; C04; C04B; C04B24/00; C04B24/24; C04B24/26; C04B24/2682; C04B26/00; C04B26/02; C04B26/04; C08F; C08F214/00; C08F214/02; C08F214/04; C08F214/06; C08J2327/00; C08J2327/02; C08J2327/04; C08J2327/06
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
233 words
A process for the preparation of a readily dispersible, pourable dispersion powder capable of forming stable redispersions in water comprising emulsion polymerizing in the presence of a free radical initiator a mixture consisting essentially of 1 to 50% by weight of ethylene and 99 to 50% by weight of an ethylenically unsaturated comonomer phase comprising at least one member of the group consisting of (a) 60 to 100% by weight of vinyl chloride, (b) 0 to 40% by weight of monoethylenically unsaturated, oil-soluble monomers, (c) 0 to 10% by weight of monoethylenically unsaturated water-soluble monomers having functional groups and (d) 0 to 5% by weight of oil-soluble monomers that are mono-ethylenically unsaturated and have functional groups or are multiple ethylenically unsaturated and optionally a protective colloid and free of emulsifier at an ethylene pressure of 10 to 150 bar to obtain an aqueous dispersion of a vinyl chloride-ethylene copolymer, optionally adding to the aqueous dispersion (e) 0 to 40% by weight, based on the VCE-polymer, of at least one water-soluble substance having a T g 60° C., (f) 0 to 1% by weight, based on the VCE-polymer, of an antifoaming agent, and (g) 0 to 30% by weight, based on the total weight of polymer constituents, of a finely divided antiblocking agent and spray drying or freeze drying the aqueous dispersion to obtain the readily redispersible pourable powder of a vinyl chloride-ethylene copolymer.
Claim 2
Dependent Claim
233 words
A process for the preparation of a readily dispersible, pourable dispersion powder capable of forming stable redispersions in water comprising emulsion polymerizing in the presence of a free radical initiator a mixture consisting essentially of 1 to 50% by weight of ethylene and 99 to 50% by weight of an ethylenically unsaturated comonomer phase comprising at least one member of the group consisting of (a) 60 to 100% by weight of vinyl chloride, (b) 0 to 40% by weight of monoethylenically unsaturated, oil-soluble monomers, (c) 0 to 10% by weight of monoethylenically unsaturated water-soluble monomers having functional groups and (d) 0 to 5% by weight of oil-soluble monomers that are mono-ethylenically unsaturated and have functional groups or are multiple ethylenically unsaturated and optionally a protective colloid and free of emulsifier at an ethylene pressure of 10 to 150 bar to obtain an aqueous dispersion of a vinyl chloride-ethylene copolymer, optionally adding to the aqueous dispersion (e) 0 to 40% by weight, based on the VCE-polymer, of at least one water-soluble substance having a T g 60° C., (f) 0 to 1% by weight, based on the VCE-polymer, of an antifoaming agent, and (g) 0 to 30% by weight, based on the total weight of polymer constituents, of a finely divided antiblocking agent and spray drying or freeze drying the aqueous dispersion to obtain the readily redispersible pourable powder of a vinyl chloride-ethylene copolymer.
Claim 3
Dependent Claim
67 words
The process of claim 1 wherein the comonomer phase optionally contains in addition to vinyl chloride (b) ethylenically unsaturated esters of non-ethylenically unsaturated, straight-chain, branched or cyclic carboxylic acids, and/or alkyl esters of ethylenically unsaturated carboxylic acids and/or halogen derivatives of ethylene and (c) ethylenically unsaturated monomers which contain a functional group selected from the group consisting of carboxyl, optionally substituted amide, sulfonate, phosphate, phosphonate and hydroxy.
Claim 4
Dependent Claim
75 words
The process of claim 1 or 2 wherein component b is at least one member selected from the group consisting of vinyl esters of alkylcarboxylic acids of 1 to 20 carbon atoms, alkyl of 1 to 18 carbon atoms esters with α,β-unsaturated monocarboxylic acids of 3 to 8 carbon atoms and dialkyl of 1 to 18 carbon atoms esters of ethylenically unsaturated dicarboxylic acids of 4 to 10 carbon atoms, vinyl halides and/or vinylidene halides.
Claim 5
Dependent Claim
40 words
The process of claim 1 or 2 wherein component c is at least one member of the group consisting of acrylic acid, methacrylic acid, alkali metal and ammonium salts thereof, acrylamide, methacrylamide, N-methylolacrylamide, N-methylolmethacrylamide, vinyl sulfonate, hydroxyethyl(meth)acrylate, sulfoethyl(meth)acrylate and sulfopropyl(meth)acrylate.
Claim 6
Dependent Claim
54 words
The process of claim 1 or 2 wherein component c is a water-soluble substance with a T g 24 60° C. and is at least one member selected from the group consisting of vinyl alcohol copolymers, starch derivatives, vinylpyrrolidone (co)polymers, polyacrylic acid, polyacrylamide, cellulose derivatives, ligninsulfonates, melamine-formaldehyde condensation products and naphthalenesulfonic acid-formaldehyde condensation products.
Claim 7
Dependent Claim
23 words
The process of claim 1 or 2 wherein the dispersion contains 1 to 20% by weight of protective colloid based on the polymer.
Claim 8
Dependent Claim
40 words
The process of claim 1 or 2 wherein the total amount of the protective colloid and of the water-soluble substances having a T g ≧60° C. during the spray-drying is from 5 to 50% by weight based on the polymer.
Claim 9
Dependent Claim
9 words
The product produced by the process of claim 1.
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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) | 1992-08-21 | 1993-02-20 | 1993-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-21 | 1997-02-20 | 1997-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-21 | 2001-02-20 | 2001-08-22 | $7700.00 | Window Closed / Lapsed |