Patent US4309328A successfully refreshed from Google Patents.
US4309328A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stable aqueous dispersions of particles of vinylidene fluoride polymer
Assignee: PPG Industries Inc
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Filing: 1979-11-28
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Granted: 1982-01-05
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Expires: 1999-11-28
Abstract
Abstract Coating compositions based on stable aqueous dispersions of particles of vinylidene fluoride polymer are prepared by bringing into admixture unstabilized particles of vinylidene fluoride polymer, liquid organic active solvent for the vinylidene fluoride polymer, liquid nonsolvent, which may be liquid organic nonsolvent, water or a combination of liquid organic nonsolvent and water, and, if not present in the liquid nonsolvent, water. The mixing is conducted such that the particles of vinylidene fluoride polymer are wetted by the dispersion vehicle, yet the particles are not substantially solubilized by the active solvent.
Inventors
- 👤 Dennis W. Carson
- 👤 Ralph C. Gray
- 👤 Glenn W. Luckock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:30
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/03; C08J3/05; C09; C09D; C09D127/00; C09D127/02; C09D127/12; C09D127/16; C09D133/00; C09D133/04; C09D133/06; C09D133/08; C08J2327/00; C08J2327/02; C08J2327/12; C08J2327/16; C08L; C08L27/00; C08L27/02; C08L27/12; C08L27/16; C08L33/00; C08L33/04; C08L33/06; C08L33/08; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/31935
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
189 words
A method for producing a stable aqueous dispersion of particles of vinylidene fluoride polymer comprising bringing into admixture: (a) unstabilized particles of vinylidene fluoride polymer, (b) dispersion vehicle which is an interpolymer of monoethylenically unsaturated monomers wherein said monomers comprise acrylic ester monomer and monoethylenically unsaturated acid and which is at least partially neutralized, (c) liquid organic active solvent for said vinylidene fluoride polymer wherein said active solvent is miscible with water and wherein said active solvent would itself dissolve vinylidene fluoride polymer particles at some temperature below about 40° C., (d) liquid organic nonsolvent for said vinylidene fluoride polymer wherein said organic nonsolvent is miscible with water and with said active solvent, and (e) water; wherein: (f) said active solvent is brought into contact with said particles in the presence of said organic nonsolvent, (g) said dispersion vehicle is at least partially neutralized before said dispersion vehicle is brought into contact with said water, and (h) the amounts of said active solvent and said organic nonsolvent are such that such particles are wetted by said dispersion vehicle but said particles are not substantially solubilized by said active solvent.
Claim 2
Independent Claim
189 words
A method for producing a stable aqueous dispersion of particles of vinylidene fluoride polymer comprising bringing into admixture: (a) unstabilized particles of vinylidene fluoride polymer, (b) dispersion vehicle which is an interpolymer of monoethylenically unsaturated monomers wherein said monomers comprise acrylic ester monomer and monoethylenically unsaturated acid and which is at least partially neutralized, (c) liquid organic active solvent for said vinylidene fluoride polymer wherein said active solvent is miscible with water and wherein said active solvent would itself dissolve vinylidene fluoride polymer particles at some temperature below about 40° C., (d) liquid organic nonsolvent for said vinylidene fluoride polymer wherein said organic nonsolvent is miscible with water and with said active solvent, and (e) water; wherein: (f) said active solvent is brought into contact with said particles in the presence of said organic nonsolvent, (g) said dispersion vehicle is at least partially neutralized before said dispersion vehicle is brought into contact with said water, and (h) the amounts of said active solvent and said organic nonsolvent are such that such particles are wetted by said dispersion vehicle but said particles are not substantially solubilized by said active solvent.
Claim 3
Dependent Claim
19 words
The method of claim 1 wherein methyl methacrylate constitutes at least about 50 percent by weight of said monomers.
Claim 4
Dependent Claim
18 words
The method of claim 1 wherein said monoethylenically unsaturated acid is acrylic acid, methacrylic acid or mixtures thereof.
Claim 5
Dependent Claim
14 words
The method of claim 1 wherein said monomers include hydroxy functional monoethylenically unsaturated monomer.
Claim 6
Dependent Claim
24 words
The method of claim 4 wherein said hydroxy functional monoethylenically unsaturated monomer is 2-hydroxyethyl acrylate, 2-hydroxyethyl methacrylate, 2-hydroxypropyl acrylate, 2-hydroxypropyl methacrylate or mixtures thereof.
Claim 7
Dependent Claim
16 words
The method of claim 1 wherein said dispersion vehicle is at least partially neutralized with amine.
Claim 8
Dependent Claim
64 words
The method of claim 1 wherein: (a) said unstabilized particles are admixed with a solution comprising unneutralized dispersion vehicle, said active solvent and said organic nonsolvent to form at first intermediate composition, (b) said unneutralized dispersion vehicle in said first intermediate composition is at least partially neutralized to form a second intermediate composition, and (c) said second intermediate composition is admixed with said water.
Claim 9
Dependent Claim
78 words
The method of claim 1 wherein: (a) said unstabilized particles are admixed with a solution comprising said active solvent and said organic nonsolvent to form a first intermediate composition. (b) said first intermediate composition is admixed with unneutralized dispersion vehicle to form a second intermediate composition, (c) said unneutralized dispersion vehicle in said second intermediate composition is at least partially neutralized to form a third intermediate composition, and (d) said third intermediate composition is admixed with said water.
Claim 10
Dependent Claim
78 words
The method of claim 1 wherein: (a) unneutralized dispersion vehicle in a solution comprising said unneutralized dispersion vehicle and said organic nonsolvent is at least partially neutralized to form a first intermediate composition, (b) said first intermediate composition is admixed with said active solvent to form a second intermediate composition, (c) said second intermediate composition is admixed with said unstabilized particles to form a third intermediate composition, and (d) said third intermediate composition is admixed with said water.
Claim 11
Independent Claim
165 words
A method for producing a stable aqueous dispersion of particles of vinylidene fluoride polymer comprising bringing into admixture: (a) unstabilized particles of vinylidene fluoride polymer, (b) dispersion vehicle which is an interpolymer of monoethylenically unsaturated monomers wherein said monomers comprise acrylic ester monomer and monoethylenically unsaturated acid and which is at least partially neutralized, (c) liquid organic active solvent for said vinylidene fluoride polymer wherein said active solvent is miscible with water and wherein said active solvent would itself dissolve vinylidene fluoride polymer particles at some temperature below about 40° C., and (d) water; wherein: (e) said active solvent is brought into contact with said particles in the presence of said water, (f) said dispersion vehicle is at least partially neutralized before said dispersion vehicle is brought into contact with said water, and (g) the amounts of said active solvent and said water are such that said particles are wetted by said dispersion vehicle but said particles are not substantially solubilized by said active solvent.
Claim 12
Independent Claim
165 words
A method for producing a stable aqueous dispersion of particles of vinylidene fluoride polymer comprising bringing into admixture: (a) unstabilized particles of vinylidene fluoride polymer, (b) dispersion vehicle which is an interpolymer of monoethylenically unsaturated monomers wherein said monomers comprise acrylic ester monomer and monoethylenically unsaturated acid and which is at least partially neutralized, (c) liquid organic active solvent for said vinylidene fluoride polymer wherein said active solvent is miscible with water and wherein said active solvent would itself dissolve vinylidene fluoride polymer particles at some temperature below about 40° C., and (d) water; wherein: (e) said active solvent is brought into contact with said particles in the presence of said water, (f) said dispersion vehicle is at least partially neutralized before said dispersion vehicle is brought into contact with said water, and (g) the amounts of said active solvent and said water are such that said particles are wetted by said dispersion vehicle but said particles are not substantially solubilized by said active solvent.
Claim 13
Independent Claim
193 words
A method for producing a stable aqueous dispersion of particles of vinylidene fluoride polymer comprising bringing in admixture: (a) unstabilized particles of vinylidene fluoride polymer, (b) dispersion vehicle which is an interpolymer of monoethylenically unsaturated monomers wherein said monomers comprise acrylic ester monomer and monoethylenically unsaturated acid and which is at least partially neutralized, (c) liquid organic active solvent for said vinylidene fluoride polymer wherein said active solvent is miscible with water and wherein said active solvent would itself dissolve vinylidene fluoride polymer particles at some temperature below about 40° C., (d) liquid organic nonsolvent for said vinylidene fluoride polymer wherein said nonsolvent is miscible with water and with said active solvent, and (e) water; wherein: (f) said active solvent is brought into contact with said particles in the presence of said organic nonsolvent and said water, (g) said dispersion vehicle is at least partially neutralized before said dispersion vehicle is brought into contact with said water, and (h) the amounts of said active solvent, said organic nonsolvent and said water are such that said particles are wetted by said disperson vehicle but said particles are not substantially solubilized by said active solvent.
Claim 14
Independent Claim
193 words
A method for producing a stable aqueous dispersion of particles of vinylidene fluoride polymer comprising bringing in admixture: (a) unstabilized particles of vinylidene fluoride polymer, (b) dispersion vehicle which is an interpolymer of monoethylenically unsaturated monomers wherein said monomers comprise acrylic ester monomer and monoethylenically unsaturated acid and which is at least partially neutralized, (c) liquid organic active solvent for said vinylidene fluoride polymer wherein said active solvent is miscible with water and wherein said active solvent would itself dissolve vinylidene fluoride polymer particles at some temperature below about 40° C., (d) liquid organic nonsolvent for said vinylidene fluoride polymer wherein said nonsolvent is miscible with water and with said active solvent, and (e) water; wherein: (f) said active solvent is brought into contact with said particles in the presence of said organic nonsolvent and said water, (g) said dispersion vehicle is at least partially neutralized before said dispersion vehicle is brought into contact with said water, and (h) the amounts of said active solvent, said organic nonsolvent and said water are such that said particles are wetted by said disperson vehicle but said particles are not substantially solubilized by said active solvent.
Claim 15
Dependent Claim
20 words
A stable aqueous dispersion of particles of vinylidene fluoride polymer which has been produced by the method of claim 1.
Claim 16
Dependent Claim
20 words
A stable aqueous dispersion of particles of vinylidene fluoride polymer which has been produced by the method of claim 2.
Claim 17
Dependent Claim
20 words
A stable aqueous dispersion of particles of vinylidene fluoride polymer which has been produced by the method of claim 3.
Claim 18
Dependent Claim
20 words
A stable aqueous dispersion of particles of vinylidene fluoride polymer which has been produced by the method of claim 4.
Claim 19
Dependent Claim
20 words
A stable aqueous dispersion of particles of vinylidene fluoride polymer which has been produced by the method of claim 5.
Claim 20
Dependent Claim
20 words
A stable aqueous dispersion of particles of vinylidene fluoride polymer which has been produced by the method of claim 6.
Claim 21
Dependent Claim
20 words
A stable aqueous dispersion of particles of vinylidene fluoride polymer which has been produced by the method of claim 7.
Claim 22
Dependent Claim
20 words
A stable aqueous dispersion of particles of vinylidene fluoride polymer which has been produced by the method of claim 8.
Claim 23
Dependent Claim
20 words
A stable aqueous dispersion of particles of vinylidene fluoride polymer which has been produced by the method of claim 9.
Claim 24
Dependent Claim
20 words
A stable aqueous dispersion of particles of vinylidene fluoride polymer which has been produced by the method of claim 10.
Claim 25
Dependent Claim
20 words
A stable aqueous dispersion of particles of vinylidene fluoride polymer which has been produced by the method of claim 11.
Claim 26
Dependent Claim
32 words
In a coating composition comprising film-forming binder, aqueous fluid diluent and particles of vinylidene fluoride polymer, the improvement comprising said coating composition having formulated therein the stable aqueous dispersion of claim 12.
Claim 27
Dependent Claim
32 words
In a coating composition comprising film-forming binder, aqueous liquid diluent and particles of vinylidene fluoride polymer, the improvement comprising said coating composition having formulated therein the stable aqueous dispersion of claim 18.
Claim 28
Dependent Claim
32 words
In a coating composition comprising film-forming binder, aqueous liquid diluent and particles of vinylidene fluoride polymer, the improvement comprising said coating compositon having formulated therein the stable aqueous dispersion of claim 19.
Claim 29
Dependent Claim
32 words
In a coating composition comprising film-forming binder, aqueous liquid diluent and particles of vinylidene fluoride polymer, the improvement comprising said coating composition having formulated therein the stable aqueous dispersion of claim 20.
Claim 30
Dependent Claim
32 words
In a coating composition comprising film-forming binder, aqueous liquid diluent and particles of vinylidene fluoride polymer, the improvement comprising said coating composition having formulated therein the stable aqueous dispersion of claim 21.
Claim 31
Dependent Claim
32 words
In a coating compositon comprising film-forming binder, aqueous liquid diluent and particles of vinylidene fluoride polymer, the improvement comprising said coating composition having formulated therein the stable aqueous dispersion of claim 22.
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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) | 1985-01-04 | 1985-07-06 | 1986-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-01-04 | 1989-07-06 | 1990-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-01-04 | 1993-07-06 | 1994-01-05 | $7700.00 | Window Closed / Lapsed |