US4101489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-soluble phenol/formaldehyde condensation products
Assignee: Bayer AG
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Filing: 1977-03-04
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Granted: 1978-07-18
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Expires: 1997-03-04
Abstract
Abstract Water-soluble condensation products which are obtained by reacting mononuclear phenol/formaldehyde/bisulphite condensation products with formaldehyde and, if appropriate, notrogen-containing compounds of a type which can react with at least 2 equivalents of formaldehyde, can be used as dispersing agents.
Inventors
- 👤 Gunther Reitz
- 👤 Gunther Boehmke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:01
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/44; D06P1/52; D06P1/56; C; C08; C08G; C08G8/00; C08G8/28; C09; C09B; C09B67/00; C09B67/0071; C09B67/0084; C09B67/0085; C09K; C09K23/00; C09K23/12; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/03; Y10S516/05
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
80 words
Dispersing agent which is the reaction product of 1. a mononuclear phenol/formaldehyde/bisulfite condensation product resulting from the condensation of 0.9-1.1 mols of each of formaldehyde and bisulfite per mol of phenol in an aqueous medium in the presence of a basic catalyst, and 2. per mol of phenol in said condensation product a. 0.8-1.1 mols of formaldehyde or b. 0.8-4.0 mols of formaldehyde and 0.1-2.0 mols of a nitrogen-containing compound capable of reacting with at lease two equivalents of formaldehyde.
Claim 2
Dependent Claim
80 words
Dispersing agent which is the reaction product of 1. a mononuclear phenol/formaldehyde/bisulfite condensation product resulting from the condensation of 0.9-1.1 mols of each of formaldehyde and bisulfite per mol of phenol in an aqueous medium in the presence of a basic catalyst, and 2. per mol of phenol in said condensation product a. 0.8-1.1 mols of formaldehyde or b. 0.8-4.0 mols of formaldehyde and 0.1-2.0 mols of a nitrogen-containing compound capable of reacting with at lease two equivalents of formaldehyde.
Claim 3
Dependent Claim
12 words
Dispersing agent of claim 1, wherein urea is the said nitrogen-containing compound.
Claim 4
Dependent Claim
12 words
Dispersing agent of claim 1, wherein dimethylolurea is the said nitrogen-containing compound.
Claim 5
Dependent Claim
24 words
Dispersing agent of claim 1, wherein the said basic catalyst is present in the amount of 0.2 - 3.5 mol%, based on the phenol.
Claim 6
Dependent Claim
32 words
Dispersing agent according to claim 1, wherein said condensation product is the result of reacting phenol and hydroxymethanesulphonate in the presence of 7-14 mol%, based on the phenol, of a basic catalyst.
Claim 7
Dependent Claim
33 words
Dispersing agent of claim 1, wherein the said condensation product is prepared at a reaction temperature of 40° C to the boiling point and a reaction time of 5 minutes to 48 hours.
Claim 8
Dependent Claim
39 words
Dispersing agent of claim 1, wherein the reaction of said condensation product with formaldehyde or with formaldehyde and a nitrogen-containing compound is carried out between 60° C and the boiling point for a time of 1 to 20 hours.
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) | 1981-07-17 | 1982-01-16 | 1982-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-17 | 1986-01-16 | 1986-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-17 | 1990-01-16 | 1990-07-18 | $7700.00 | Window Closed / Lapsed |