GB528479A - A process for the manufacture of resinous condensation products - Google Patents
A process for the manufacture of resinous condensation productsInfo
- Publication number
- GB528479A GB528479A GB1373639A GB1373639A GB528479A GB 528479 A GB528479 A GB 528479A GB 1373639 A GB1373639 A GB 1373639A GB 1373639 A GB1373639 A GB 1373639A GB 528479 A GB528479 A GB 528479A
- Authority
- GB
- United Kingdom
- Prior art keywords
- urea
- butanol
- mols
- formaldehyde
- gram
- 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
- C08G12/421—Chemically modified polycondensates by etherifying of polycondensates based on acyclic or carbocyclic compounds
- C08G12/422—Chemically modified polycondensates by etherifying of polycondensates based on acyclic or carbocyclic compounds based on urea or thiourea
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
528,479. Urea-formaldehyde condensation products. BECK, KOLLER & CO. (ENGLAND), Ltd., (Hodgins, T. S., and Hovey, A. G.). May 8, 1939, Nos. 13736 and 28137. [Class 2 (iii)] Urea-formaldehyde condensation products, suitable for use in preparing coating compositions, are prepared by condensing aqueous formaldehyde with urea in the presence of butanol, undersuperatmospheric pressures reflux, a temperature of 100‹C. and initial pH between 8 and 9, in presence of an alkaline-reacting catalyst, and thereafter further condensing by heating in an acid medium, until the nitrogen content is approximately 18 per cent., at least 2¢ mols. formaldehyde and 3 mols. butanol per mol. urea being employed. In examples : (1) urea 24 gram mols. aqueous formaldehyde, 7.2 gram mols. butanol and 8 gram mols. urea, together with a little ammonia, giving pH between 8 and 9 are heated to 100‹C. in one hour and maintained for about 1 hour under 2 atmospheres pressure ; further butanol, making a total of 24 gram molecules is then added and the reaction completed in an acid medium either under vacuum or atmospheric pressure (2) urea, aqueous formaldehyde and butanol in molecular ratios 1:3:3 are worked up with potassium hydroxide, under reflux, then acidified with phosphoric acid and the reaction completed by distilling off the azeotrope of butanol and water. The products are soluble in alcohols, ketones, aromatic hydrocarbons and tolerate straight-chain aliphatic hydrocarbons, and are compatible with oil modified alkyd resins. Specifications 256,248, 261,029, 309,849, 327,673, [all in Class 2 (iii)], 344,626, 442,054, 484,200, 491,857, 494,700 and 511,087 U.S.A. Specification 2,108,113 and Re-issue 19463, and German Specification 403,645 are referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1373639A GB528479A (en) | 1939-05-08 | 1939-05-08 | A process for the manufacture of resinous condensation products |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1373639A GB528479A (en) | 1939-05-08 | 1939-05-08 | A process for the manufacture of resinous condensation products |
Publications (1)
Publication Number | Publication Date |
---|---|
GB528479A true GB528479A (en) | 1940-10-30 |
Family
ID=10028425
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1373639A Expired GB528479A (en) | 1939-05-08 | 1939-05-08 | A process for the manufacture of resinous condensation products |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB528479A (en) |
-
1939
- 1939-05-08 GB GB1373639A patent/GB528479A/en not_active Expired
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