US4327004A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aqueous dispersions of plastics in which the average diameter of the dispersion particles is in the range from about 50 to 500 nm, and a process for their preparation
Assignee: Bayer AG
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Filing: 1980-07-30
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Granted: 1982-04-27
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Expires: 2000-07-30
Abstract
Abstract An aqueous dispersion of a synthetic polymer of average diameter in the range of 50 to 500 nm and especially above 75 nm is disclosed, the aqueous dispersion having a solids content of 5 to 50 parts by weight per 100 parts per weight of total dispersion. The aqueous dispersion is provided by effecting polymerization in the presence of an emulsifier which comprises an alkali metal salt of a polysulfonic acid of an alkane of medium chain length e.g. 8 to 22 carbon atoms.
Inventors
- 👤 Adolf Schmidt
- 👤 August Bockmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:25
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/12; C08F2/16; C08F2/22; C08F2/24; C08F2/26
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
60 words
In a process for the preparation of an aqueous dispersion of a synthetic polymer by polymerization of a monomer or mixture of monomers thereof in an aqueous medium in the presence of an initiator and an emulsifier, the improvement wherein said emulsifier comprises an alkali metal salt of a polysulfonic acid of an alkane of 8 to 22 carbon atoms.
Claim 2
Dependent Claim
60 words
In a process for the preparation of an aqueous dispersion of a synthetic polymer by polymerization of a monomer or mixture of monomers thereof in an aqueous medium in the presence of an initiator and an emulsifier, the improvement wherein said emulsifier comprises an alkali metal salt of a polysulfonic acid of an alkane of 8 to 22 carbon atoms.
Claim 3
Dependent Claim
31 words
A process according to claim 1, wherein said emulsifier comprises 15 to 100 parts by weight of said alkali metal salt of polysulfonic acid per 100 parts by weight of emulsifier.
Claim 4
Dependent Claim
23 words
A process according to claim 3, wherein said emulsifier comprises 0.05 to 10 parts by weight per 100 parts by weight of water.
Claim 5
Dependent Claim
29 words
A process according to claim 1, wherein said alkali metal salt of polysulfonic acid of an alkane of chain length 8-22 carbon atoms is in admixture with another emulsifier.
Claim 6
Dependent Claim
19 words
A process according to claim 1, wherein said alkane has a chain length of 13 to 17 carbon atoms.
Claim 7
Dependent Claim
27 words
A process according to claim 3, wherein said emulsifier is present in an amount of 0.5 to 5 parts by weight per 100 parts by weight water.
Claim 8
Dependent Claim
28 words
A process according to claim 3, wherein the monomer or mixture of monomers is present in the aqueous medium in an amount of 5 to 50% by weight.
Claim 9
Dependent Claim
23 words
A process according to claim 3, wherein said alkali metal salt is an alkali metal salt of a mixture of linear polysulfonate alkanes.
Claim 10
Dependent Claim
83 words
An aqueous dispersion of a synthetic polymer having particles of an average diameter in the range of about 50 to about 500 nm, said aqueous dispersion having a solids content of 5 to 50 parts by weight per 100 parts by weight of total dispersion, said aqueous dispersion containing an emulsifier which comprises 15 to 100 parts by weight of an alkali metal salt of a polysulfonic acid of an alkane of medium chain length per 100 parts by weight of total emulsifier.
Claim 11
Dependent Claim
83 words
An aqueous dispersion of a synthetic polymer having particles of an average diameter in the range of about 50 to about 500 nm, said aqueous dispersion having a solids content of 5 to 50 parts by weight per 100 parts by weight of total dispersion, said aqueous dispersion containing an emulsifier which comprises 15 to 100 parts by weight of an alkali metal salt of a polysulfonic acid of an alkane of medium chain length per 100 parts by weight of total emulsifier.
Claim 12
Dependent Claim
33 words
An aqueous dispersion according to claim 9, wherein said emulsifier is present in said aqueous dispersion in an amount of 0.05 to 10 parts by weight per 100 parts by weight of water.
Claim 13
Dependent Claim
18 words
An aqueous dispersion according to claim 9, wherein said particles have an average diameter of above 95 nm.
Claim 14
Dependent Claim
21 words
An aqueous dispersion according to claim 11, wherein said particles have an average diameter of about 150 to about 500 nm.
Claim 15
Dependent Claim
14 words
An aqueous dispersion according to claim 9, wherein said synthetic polymer is a thermoplastic.
Claim 16
Dependent Claim
16 words
An aqueous dispersion according to claim 9 wherein said synthetic polymer is a polyvinyl chloride polymer.
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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) | 1985-04-26 | 1985-10-26 | 1986-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-04-26 | 1989-10-26 | 1990-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-04-26 | 1993-10-26 | 1994-04-27 | $7700.00 | Window Closed / Lapsed |