Patent US5442006A successfully refreshed from Google Patents.
US5442006A
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Aqueous polymer dispersion having a wide particle size distribution
Assignee: BASF SE
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Filing: 1994-04-19
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Granted: 1995-08-15
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Expires: 2014-04-19
Abstract
Abstract An aqueous polymer dispersion with a solids volume concentration of at least 50% by volume is obtainable by polymerizing monomers by the method of free radical aqueous emulsion polymerization with the addition of at least one fine and at least one coarse aqueous starting polymer dispersion.
Inventors
- 👤 Oral Aydin
- 👤 Michael Portugall
- 👤 Josef Neutzner
- 👤 Walter Maechtle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:01
CPC Classifications
C; C08; C08F; C08F265/00; C08F265/04; C08F265/06; C08F291/00
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
79 words
An aqueous polymer dispersion whose solids volume concentration is ≧50% by volume and which has all the following polymer particle size distributions: 5-30% by weight of the polymer ≦200 nm 20-55% by weight of the polymer ≦300 nm 45-70% by weight of the polymer ≦400 nm 60-85% by weight of the polymer ≦600 nm 75-95% by weight of the polymer ≦800 nm 100% by weight of the polymer ≦2000 nm, the polymer being formed from free radically polymerizable monomers.
Claim 2
Dependent Claim
79 words
An aqueous polymer dispersion whose solids volume concentration is ≧50% by volume and which has all the following polymer particle size distributions: 5-30% by weight of the polymer ≦200 nm 20-55% by weight of the polymer ≦300 nm 45-70% by weight of the polymer ≦400 nm 60-85% by weight of the polymer ≦600 nm 75-95% by weight of the polymer ≦800 nm 100% by weight of the polymer ≦2000 nm, the polymer being formed from free radically polymerizable monomers.
Claim 3
Dependent Claim
23 words
An aqueous polymer dispersion as claimed in claim 1, wherein said aqueous polymer dispersion has a solids volume concentration of ≧65% by volume.
Claim 4
Dependent Claim
69 words
An aqueous polymer dispersion as claimed in claim 1, wherein said aqueous polymer dispersion comprises a polymer comprising: from 70-99% by weight of a C 1-8 alkanol ester of acrylic acid, a C 1-8 alkanol ester of methacrylic acid or a mixture thereof, from 1-5% by weight of acrylic acid, methacrylic acid or a mixture thereof, and from 0-25% by weight of vinyl acetate, styrene or a mixture thereof.
Claim 5
Dependent Claim
23 words
An aqueous polymer dispersion as claimed in claim 3, wherein said aqueous polymer dispersion has a solids volume concentration of ≧65% by volume.
Claim 6
Dependent Claim
52 words
An aqueous polymer dispersion as claimed in claim 1, further comprising at least one surface active substance of the formula I ##STR2## where R 1 and R 2 are each hydrogen or C 4-24 -alkyl, but are not both hydrogen, and X and Y are each an alkali metal or ammonium ion.
Claim 7
Dependent Claim
23 words
An aqueous polymer dispersion as claimed in claim 5, wherein said aqueous polymer dispersion has a solids volume concentration of ≧65% by volume.
Claim 8
Dependent Claim
46 words
An aqueous polymer dispersion as claimed in claim 1, wherein said aqueous polymer dispersion comprises a polymer comprising from 70 to 100% by weight of a C 1-12 alkanol ester of acrylic acid, a C 1-12 alkanol ester of methacrylic acid, styrene or a mixture thereof.
Claim 9
Dependent Claim
34 words
An aqueous polymer dispersion as claimed in claim 1, wherein said aqueous polymer dispersion comprises a polymer comprising from 70 to 100% by weight of styrene, butadiene or a mixture of butadiene and styrene.
Claim 10
Dependent Claim
33 words
An aqueous polymer dispersion as claimed in claim 1, wherein said aqueous polymer dispersion comprises a polymer comprising from 70 to 100% by weight of vinyl chloride, vinylidene chloride or a mixture thereof.
Claim 11
Dependent Claim
82 words
An aqueous polymer dispersion whose solids concentration is ≧71% by weight and ≦75% by volume and which has all the following polymer particle size distributions: 5-30% by weight of the polymer ≦200 nm 20-55% by weight of the polymer ≦300 nm 45-70% by weight of the polymer ≦400 nm 60-85% by weight of the polymer ≦600 nm 75-95% by weight of the polymer ≦800 nm 100% by weight of the polymer ≦2000 nm, the polymer being formed from free radically polymerizable monomers.
Claim 12
Dependent Claim
82 words
An aqueous polymer dispersion whose solids concentration is ≧71% by weight and ≦75% by volume and which has all the following polymer particle size distributions: 5-30% by weight of the polymer ≦200 nm 20-55% by weight of the polymer ≦300 nm 45-70% by weight of the polymer ≦400 nm 60-85% by weight of the polymer ≦600 nm 75-95% by weight of the polymer ≦800 nm 100% by weight of the polymer ≦2000 nm, the polymer being formed from free radically polymerizable monomers.
Claim 13
Dependent Claim
116 words
An aqueous polymer dispersion whose solids volume concentration is ≧65% by volume and which has all the following polymer particle size distributions: 5-30% by weight of the polymer ≦200 nm 20-55% by weight of the polymer ≦300 nm 45-70% by weight of the polymer ≦400 nm 60-85% by weight of the polymer ≦600 nm 75-95% by weight of the polymer ≦800 nm 100% by weight of the polymer ≦2000 nm, the polymer being formed from free radically polymerizable monomers selected from the group consisting of acrylic acid, methacrylic acid, methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, acrylonitrile, vinyl halides, vinylidene halides, vinyl acetate, vinyl propionate, acrylamide, methacrylamide and vinylsulfonic acid and water soluble salts thereof.
Claim 14
Dependent Claim
116 words
An aqueous polymer dispersion whose solids volume concentration is ≧65% by volume and which has all the following polymer particle size distributions: 5-30% by weight of the polymer ≦200 nm 20-55% by weight of the polymer ≦300 nm 45-70% by weight of the polymer ≦400 nm 60-85% by weight of the polymer ≦600 nm 75-95% by weight of the polymer ≦800 nm 100% by weight of the polymer ≦2000 nm, the polymer being formed from free radically polymerizable monomers selected from the group consisting of acrylic acid, methacrylic acid, methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, acrylonitrile, vinyl halides, vinylidene halides, vinyl acetate, vinyl propionate, acrylamide, methacrylamide and vinylsulfonic acid and water soluble salts thereof.
Claim 15
Dependent Claim
23 words
An aqueous polymer dispersion as claimed in claim 7, wherein said aqueous polymer dispersion has a solids volume concentration of ≧65% by volume.
Claim 16
Dependent Claim
23 words
An aqueous polymer dispersion as claimed in claim 8, wherein said aqueous polymer dispersion has a solids volume concentration of ≧65% by volume.
Claim 17
Dependent Claim
23 words
An aqueous polymer dispersion as claimed in claim 9, wherein said aqueous polymer dispersion has a solids volume concentration of ≧65% by volume.
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) | 1998-08-14 | 1999-02-13 | 1999-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-08-14 | 2003-02-13 | 2003-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-08-14 | 2007-02-13 | 2007-08-15 | $7700.00 | Window Closed / Lapsed |