GB566347A - Water-soluble melamine-formaldehyde resins and processes of preparing the same - Google Patents
Water-soluble melamine-formaldehyde resins and processes of preparing the sameInfo
- Publication number
- GB566347A GB566347A GB147/43A GB14743A GB566347A GB 566347 A GB566347 A GB 566347A GB 147/43 A GB147/43 A GB 147/43A GB 14743 A GB14743 A GB 14743A GB 566347 A GB566347 A GB 566347A
- Authority
- GB
- United Kingdom
- Prior art keywords
- under
- water
- resins
- solution
- vacuum
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Phenolic Resins Or Amino Resins (AREA)
Abstract
Water-soluble methylated methylolmelamine resins are obtained by reacting, under acid conditions, a polymethylolmelamine with methyl alcohol until a clear solution is obtained, then neutralizing the solution and dehydrating the neutralized solution under high vacuum. In examples: (1) dry hexamethylolmelamine is heated with methanol, in the presence of oxalic acid, under reflux and gently boiled until a clear solution is obtained which is then neutralized by dilute caustic soda, clarified by filtration and dehydrated, first by heating at 40-50 DEG C. under moderate vacuum and continuing until a temperature of 90 DEG C. is attained under a vacuum of 28-29"; the resulting syrup may be poured into pans and allowed to cool to a solid resin, or admixed with water to give a stable solution; (2) 10 mols. of aqueous formaldehyde and 3 mols. of melamine, made slightly alkaline with caustic soda, are heated under reflux to form a clear solution, whereupon methanol and oxalic acid are added, the mixture gently boiled for a few minutes, cooled, clarified by filtration and dehydrated under vacuum. The aqueous solutions of the resins are useful in the treatment of textiles and may be admixed with water-soluble alkyds or methyl cellulose; the solid resins may be used for the production of laminated material, or as flow promoters for urea-aldehyde and triazine aldehyde resins. Thus a methylol melamine is prepared by adjusting a mixture of 1 mol. melamine and 6.5 mols. 37 per cent formaldehyde to a pH 8.8-9 and heating to 80 DEG C. in 30 mins. and keeping at 80 DEG C. for 15 mins. The mixture is then poured into trays and dried at 40-50 DEG C. Specifications 468,677 and 486,577 are referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US566347XA | 1941-11-13 | 1941-11-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB566347A true GB566347A (en) | 1944-12-27 |
Family
ID=22005685
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB147/43A Expired GB566347A (en) | 1941-11-13 | 1943-01-04 | Water-soluble melamine-formaldehyde resins and processes of preparing the same |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB566347A (en) |
-
1943
- 1943-01-04 GB GB147/43A patent/GB566347A/en not_active Expired
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