US4383056A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of converting resin solution to aqueous dispersion
Assignee: Dow Chemical Co
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Filing: 1981-12-10
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Granted: 1983-05-10
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Expires: 2001-12-10
Abstract
Abstract Solutions of amine-salified phosphoresins and the free amine in organic solvents are converted to stable dispersions of the salified resins in water by steam stripping under conditions such that at least part of the water is provided as condensed steam.
Inventors
- 👤 Alvin W. Baker
- 👤 Robert DeVellis
- 👤 Patrick H. Martin
- 👤 Robin A. Withers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:48
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/03; C08J3/07
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
51 words
The method of converting a solution of a water-dispersible, salified phosphoester resin to an aqueous dispersion of said resin which comprises steam-stripping said solution with vigorous agitation and under conditions such that at least a portion of the water required for the desired final solids content is provided by steam condensation.
Claim 2
Independent Claim
51 words
The method of converting a solution of a water-dispersible, salified phosphoester resin to an aqueous dispersion of said resin which comprises steam-stripping said solution with vigorous agitation and under conditions such that at least a portion of the water required for the desired final solids content is provided by steam condensation.
Claim 3
Dependent Claim
147 words
The method of claim 1 wherein: said solution comprises a steam-strippable free base and a solvent component removeable by steam stripping, said phosphoester groups are >PO(OH) or --PO(OH) 2 groups and the amount of said free base is such that removal of said solvent component by steam stripping will not result in the co-stripping of so much base that a stable, aqueous dispersion cannot be formed from the stripped resin, and said method also comprises: a. if necessary, adding enough of said free base to the solution to be or being stripped to provide said amount of that base, b. optionally, forming a mixture of said solution with water, and c. by introducing said steam, to said solution or mixture, thereby simultaneously (1) providing liquid water to said solution or mixture as condensate, (2) removing said solvent component and (3) forming said aqueous dispersion of the resin.
Claim 4
Dependent Claim
12 words
The method of claim 2 wherein said free base is an amine.
Claim 5
Dependent Claim
20 words
The method of claim 3 wherein the base present in the salified phosphoester groups is the same as said amine.
Claim 6
Dependent Claim
13 words
The method of claim 2 wherein said phosphoester groups are --PO(OH) 2 groups.
Claim 7
Dependent Claim
53 words
The method of claim 5 wherein said phosphoresin is deriveable by the reaction of aqueous phosphoric acid with an epoxy resin of the formula ##STR7## where Q is the residue of dihydroxy benzene or a di(hydroxyphenyl)alkane, R is H or --CH 3 and n has a value of from 0 to about 40.
Claim 8
Dependent Claim
22 words
The method of claim 2 wherein said phosphoester groups are phosphonoester ##STR8## groups, wherein R is a substituted or unsubstituted hydrocarbyl radical.
Claim 9
Dependent Claim
17 words
The method of claim 6 in which n has a value of from about 10 to 13.
Claim 10
Dependent Claim
47 words
The method of claim 8 wherein said free base is an amine and said solvent system is a CH 2 Cl 2 /acetone solution in which the weight ratio of CH 2 Cl 2 to acetone is within the range of from about 20/80 to about 28/72.
Claim 11
Dependent Claim
24 words
The method of claim 9 in which said amine is the same as the base present in the salified phosphoester groups and is triethylamine.
Claim 12
Dependent Claim
19 words
The method of claim 10 in which the CH 2 Cl 2 to acetone weight ratio is about 27/73.
Claim 13
Dependent Claim
26 words
The method of claim 10 in which the overall content of triethylamine in said solution is from about 3.3 to about 6.6 molecules per phosphoester group.
Claim 14
Dependent Claim
12 words
The method of claim 12 in which said ratio is about 6.5.
Claim 15
Dependent Claim
18 words
The method of claim 2 in which said phosphoester groups are β-hydroxy phosphomonoester groups having the formula ##STR9##
References Cited (Backward Citations)
US4128516A
Cited
US4289812A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-05-09 | 1986-11-08 | 1987-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-09 | 1990-11-08 | 1991-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-09 | 1994-11-08 | 1995-05-10 | $7700.00 | Window Closed / Lapsed |