GB752527A - Process for the production of fusible alcohol-modified melamine resins - Google Patents
Process for the production of fusible alcohol-modified melamine resinsInfo
- Publication number
- GB752527A GB752527A GB24878/54A GB2487854A GB752527A GB 752527 A GB752527 A GB 752527A GB 24878/54 A GB24878/54 A GB 24878/54A GB 2487854 A GB2487854 A GB 2487854A GB 752527 A GB752527 A GB 752527A
- Authority
- GB
- United Kingdom
- Prior art keywords
- alcohol
- solution
- fusible
- resins
- melamine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G12/00—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
- C08G12/02—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes
- C08G12/40—Chemically modified polycondensates
- C08G12/42—Chemically modified polycondensates by etherifying
- C08G12/424—Chemically modified polycondensates by etherifying of polycondensates based on heterocyclic compounds
- C08G12/425—Chemically modified polycondensates by etherifying of polycondensates based on heterocyclic compounds based on triazines
- C08G12/427—Melamine
Abstract
Fusible alcohol-modified melamine resins are prepared by reacting formaldehyde with melamine in aqueous alcoholic solution in the proportion of at least 6 mols. of formaldehyde to 1 mol. of melamine, condensation to the A-stage being effected at a pH of at least 8.5, and condensing to the B-stage by acidification of the initial condensate solution after partial dehydration of this solution. The initial pH is preferably kept at 8.8 to 9 by continuous addition of alkali or by using a buffer such as trisodium phosphate. In the examples, butanol is the alcohol used, and dehydration is effected by cyclic distillation to remove about half the water. Final condensation is at a pH of 4.5 to 5.5 and the solution is completely dehydrated. The resins are particularly suitable for use with alkyd resins in lacquers. U.S.A. Specification 2,485,059 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE752527X | 1953-08-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB752527A true GB752527A (en) | 1956-07-11 |
Family
ID=6654480
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB24878/54A Expired GB752527A (en) | 1953-08-29 | 1954-08-26 | Process for the production of fusible alcohol-modified melamine resins |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB752527A (en) |
-
1954
- 1954-08-26 GB GB24878/54A patent/GB752527A/en not_active Expired
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