US4481116A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cationic aminoplastic resin, preparation process and application thereof to water treatment
Assignee: Sanofi Aventis France
•
Filing: 1982-12-09
•
Granted: 1984-11-06
•
Expires: 2002-12-09
Abstract
Abstract A novel cationic aminoplastic water-dispersible resin based on melamine, formaldehyde and glyoxal salified by a mineral or organic protonic acid, or by a mixture of such acids, selected from the group comprising hydrochloric, nitric, orthophosphoric, acetic, formic acids; it contains molar ratios, for 1 mole of melamine, of 2 to 4 moles of formaldehyde, 0.1 to 3 moles of glyoxal and 0.5 to 1 mole of mineral or organic protonic acid, or the equivalent quantity of a mixture thereof.
Inventors
- 👤 Jean Cabestany
- 👤 Claude Trouve
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:16
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/52; C02F1/54; C08; C08G; C08G12/00; C08G12/02; C08G12/26; C08G12/30; C08G12/32
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
77 words
A novel water-dispersible cationic aminoplast resin which is a condensation product of melamine, formaldehyde and glyoxal, said resin being salified by a mineral or organic protonic acid or a mixture of these acids selected from the group consisting of hydrochloric, nitric, orthophosphoric, acetic, and formic acids, and containing in molar ratios, for one mole of melamine, from 2 to 4 mole of mineral or organic protonic acid, or the equivalent quantity of a mixture of such acids.
Claim 2
Dependent Claim
77 words
A novel water-dispersible cationic aminoplast resin which is a condensation product of melamine, formaldehyde and glyoxal, said resin being salified by a mineral or organic protonic acid or a mixture of these acids selected from the group consisting of hydrochloric, nitric, orthophosphoric, acetic, and formic acids, and containing in molar ratios, for one mole of melamine, from 2 to 4 mole of mineral or organic protonic acid, or the equivalent quantity of a mixture of such acids.
Claim 3
Dependent Claim
26 words
A resin according to claim 1, containing for one mole of melamine, 4 moles of formaldehyde, 1 mole of glyoxal and 0.55 mole of hydrochloric acid.
Claim 4
Dependent Claim
26 words
A resin according to claim 1, containing for one mole of melamine, 4 moles of formaldehyde, 1 mole of glyoxal and 0.8 mole of orthophosphoric acid.
Claim 5
Dependent Claim
148 words
A process for preparation of the resin according to claim 1, comprising reacting at a temperature lower than or equal to 100° C., at an acid pH of between 2 and 5, the whole of the constituents of the resin, in the molar proportions corresponding to 2 to 4 moles of formaldehyde, 0.1 to 3 moles of glyoxal and 0.5 to 1 mole of mineral or organic acid, or the equivalent quantity of a mixture of such acids, for one mole of melamine, in a body of water such that the initial reactants concentration is of between 20 and 30 g per 100 g, and when condensation has reached a certain stage determined by a viscosity value of the reaction medium, of 35±5 centipoises as determined from a cooled sample diluted at the rate of 20 g for 100 g, stopping the reaction by cooling and water dilution.
Claim 6
Dependent Claim
22 words
A process according to claim 4, wherein the condensation reaction is carried out advantageously at a pH of between 3 and 3.5.
Claim 7
Dependent Claim
21 words
A process according to claim 4, wherein the condensation is carried out at a temperature of between 75° and 80° C.
Claim 8
Dependent Claim
16 words
A resin according to claim 1, useful in the treatment of raw waters and residual waters.
Claim 9
Dependent Claim
23 words
A resin according to claim 7, useful in treating raw waters and residual waters containing little quantities of suspension, emulsion or solution materials.
Claim 10
Dependent Claim
18 words
A resin according to claim 7, useful in treating residual waters containing mineral salts, of sea water type.
Claim 11
Dependent Claim
21 words
A resin according to claim 7 used conjointly with a coagulant selected from the group consisting of mineral and organic coagulants.
Claim 12
Dependent Claim
14 words
A resin according to claim 10, used conjointly with a mineral ferric chloride coagulant.
Claim 13
Dependent Claim
18 words
A resin according to claim 7 used for raw waters in quantities of between 1 and 20 ppm.
Claim 14
Dependent Claim
18 words
A resin according to claim 7 used for residual waters in quantities of between 20 and 500 ppm.
Claim 15
Dependent Claim
50 words
An aqueous coagulant composition comprising a major proportion of a resin according to claim 1, and a proportion of between 0 and 20% by weight of a mineral or organic acid selected from the group consisting of hydrochloric, nitric, orthophosphoric, acetic and formic acids, or a mixture of such acids.
Claim 16
Dependent Claim
13 words
A coagulant composition according to claim 14, wherein said acid is orthophosphoric acid.
Claim 17
Dependent Claim
25 words
A coagulant composition according to claim 14, comprising a major proportion of said resin and a proportion of between 0 and 20% of ferric chloride.
Claim 18
Dependent Claim
24 words
A resin composition according to claim 11, wherein said ferric chloride mineral coagulant is present in an amount of up to 20% by weight.
Claim 19
Dependent Claim
20 words
A resin composition according to claim 1 having a concentration based on the reactants of 20-30% by weight in water.
Claim 20
Dependent Claim
60 words
A resin according to claim 7 which is the condensation product of said melamine, said formaldehyde, said glyoxal and said acid present in an amount of 20-30 weight percent in a body of water, condensation having been stopped when the viscosity reaches 35±5 centipoises as determined from a cooled sample diluted at the rate of 20 g for 100 g.
Claim 21
Dependent Claim
29 words
A method of water treatment comprising adding to water in need of purification between 1 and 500 ppm of a resin made according to the process of claim 4.
References Cited (Backward Citations)
US2345543A
Cited
US2485079A
Cited
US2574114A
Cited
GB831986A
Cited
US3645841A
Cited
FR2257548A1
Cited
FR2424234A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-11-06 | 1988-05-07 | 1988-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-06 | 1992-05-07 | 1992-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-06 | 1996-05-07 | 1996-11-06 | $7700.00 | Window Closed / Lapsed |