US4133791A
Expired / Lapsed
US
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Process for the preparation of aqueous ethylene copolymer dispersions with high viscosities which consists essentially of polymerizing in the presence of polyvinyl alcohol and mixing with certain polyalkylene glycols
Assignee: Wacker Chemie AG
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Filing: 1977-11-07
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Granted: 1979-01-09
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Expires: 1997-11-07
Abstract
Abstract A process for the preparation of an aqueous ethylene-containing copolymer dispersion with viscosities above 20 Pas (measured with a Brookfield viscosimeter at 10 rpm) which consists essentially of (1) polymerizing an aqueous monomer mixture of ethylene and at least one monomer copolymerizable with ethylene under conventional ethylene copolymerization conditions in the presence of from 1% to 15% by weight of polyvinyl alcohol with a degree of hydrolyzation of 70% to 100%, to a solids content of from 30% to 60% by weight, to give a copolymer dispersion, (2) evenly distributing from 1% to 8% by weight of water-soluble polyalkylene glycols having a molecular weight of between 6,000 and 100,000 selected from the group consisting of polyethylene glycol and mixtures of polyethylene glycol/polypropylene glycol, in said copolymer dispersion, and (3) recovering said aqueous ethylene-containing copolymer dispersion with viscosities above 20 Pas.
Inventors
- 👤 Christof Kemenater
- 👤 Gerhard Bade
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:28
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/03; C08F; C08F261/00; C08F261/02; C08F261/04; C09; C09J; C09J123/00; C09J123/02; C09J123/04; C09J123/08; C08J2357/00; C08L; C08L2666/00; C08L2666/02
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
147 words
A process for the preparation of an aqueous ethylene-containing copolymer dispersion with viscosities above 20 Pas (measured with a Brookfield viscosimeter at 10 rpm) which consists essentially of (1) polymerizing an aqueous monomer mixture of ethylene and at least one monomer copolymerizable with ethylene under conventional ethylene copolymerization conditions in the presence of from 1% to 15% by weight of polyvinyl alcohol with a degree of hydrolyzation of 70% to 100% and in the absence of polyalkylene oxides to a solids content of from 30% to 60% by weight, to give a copolymer dispersion, (2) evenly distributing from 1% to 8% by weight of water-soluble polyalkylene glycols having a molecular weight of between 6,000 and 100,000 selected from the group consisting of polyethylene glycol and mixtures of polyethylene glycol/polypropylene glycol, in said copolymer dispersion, and (3) recovering said aqueous ethylene-containing copolymer dispersion with viscosities above 20 Pas.
Claim 2
Dependent Claim
147 words
A process for the preparation of an aqueous ethylene-containing copolymer dispersion with viscosities above 20 Pas (measured with a Brookfield viscosimeter at 10 rpm) which consists essentially of (1) polymerizing an aqueous monomer mixture of ethylene and at least one monomer copolymerizable with ethylene under conventional ethylene copolymerization conditions in the presence of from 1% to 15% by weight of polyvinyl alcohol with a degree of hydrolyzation of 70% to 100% and in the absence of polyalkylene oxides to a solids content of from 30% to 60% by weight, to give a copolymer dispersion, (2) evenly distributing from 1% to 8% by weight of water-soluble polyalkylene glycols having a molecular weight of between 6,000 and 100,000 selected from the group consisting of polyethylene glycol and mixtures of polyethylene glycol/polypropylene glycol, in said copolymer dispersion, and (3) recovering said aqueous ethylene-containing copolymer dispersion with viscosities above 20 Pas.
Claim 3
Dependent Claim
22 words
The process of claim 1 wherein said ethylene-containing copolymer contains from 8% to 35% by weight of the copolymer of ethylene units.
Claim 4
Dependent Claim
22 words
The process of claim 1 wherein said ethylene-containing copolymer contains from 10% to 25% by weight of the copolymer of ethylene units.
Claim 5
Dependent Claim
68 words
The process of claim 1 wherein said ethylene-containing copolymer is selected from the group consisting of ethylene/vinyl chloride copolymers, ethylene/vinyl alkanoate ester copolymers with 1 to 18 carbon atoms in the alkanoic acid group, copolymers of ethylene, vinyl chloride and a mono-ethylenically-unsaturated monomer copolymerizable therewith, and copolymers of ethylene, vinyl alkanoates with 1 to 18 carbon atoms in the alkanoic acid group, and a mono-ethylenically-unsaturated monomer copolymerizable therewith.
Claim 6
Dependent Claim
24 words
The process of claim 1 wherein said ethylene-containing copolymer is an ethylene/vinyl acetate copolymer having from 10% to 25% by weight of ethylene units.
Claim 7
Dependent Claim
24 words
The process of claim 1 wherein said polyvinyl alcohol is employed in an amount of from 3% to 8% by weight of the copolymerizate.
Claim 8
Dependent Claim
32 words
The process of claim 1 wherein said water-soluble polyalkylene glycol has a molecular weight of from 6,000 to 30,000 and is employed in an amount of from 2% to 6% by weight.
Claim 9
Dependent Claim
19 words
The process of claim 7 wherein said water-soluble polyalkylene glycol has a molecular weight of from 10,000 to 30,000.
Claim 10
Dependent Claim
22 words
The process of claim 1 wherein said water-soluble polyalkylene glycol is polyethylene glycol having a molecular weight of from 10,000 to 30,000.
Claim 11
Dependent Claim
30 words
The process of claim 1 wherein said water-soluble polyalkylene glycol is a mixture of polyethylene glycol and polypropylene glycol with from 0.5% to 20% by weight of polypropylene glycol units.
Claim 12
Dependent Claim
20 words
The process of claim 1 wherein said copolymer dispersion obtained in step (1) had a viscosity of about 7 Pas.
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) | 1982-01-08 | 1982-07-10 | 1983-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-08 | 1986-07-10 | 1987-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-08 | 1990-07-10 | 1991-01-09 | $7700.00 | Window Closed / Lapsed |