GB337357A - An improved process for the production of urea aldehyde resins - Google Patents
An improved process for the production of urea aldehyde resinsInfo
- Publication number
- GB337357A GB337357A GB1315629A GB1315629A GB337357A GB 337357 A GB337357 A GB 337357A GB 1315629 A GB1315629 A GB 1315629A GB 1315629 A GB1315629 A GB 1315629A GB 337357 A GB337357 A GB 337357A
- Authority
- GB
- United Kingdom
- Prior art keywords
- urea
- solution
- formaldehyde
- added
- alcohol
- 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
- C08G12/04—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with acyclic or carbocyclic compounds
- C08G12/10—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with acyclic or carbocyclic compounds with acyclic compounds having the moiety X=C(—N<)2 in which X is O, S or —N
- C08G12/12—Ureas; Thioureas
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L61/00—Compositions of condensation polymers of aldehydes or ketones; Compositions of derivatives of such polymers
- C08L61/20—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
- C08L61/22—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with acyclic or carbocyclic compounds
- C08L61/24—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with acyclic or carbocyclic compounds with urea or thiourea
Landscapes
- 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
337,357. Triggs, W. W., (Toledo Scale Manufacturing Co.). April 27, 1929. Urea-formaldehyde resins. - Urea is reacted with formaldehpde in aqueous solution to form an initial condensation product, the solution is concentrated, a polybasic acid-polyhydric alcohol condensation product is then added, and the solution again concentrated. In carrying out the process it is preferable to add the urea in stages, the acidity being adjusted during the process by means of triethanolamine. In an example, formaldehyde in 30 to 40 per cent solution is reacted with urea in the proportion of 2 to 2.2 mols. of formaldehyde to one mol. of urea, the pH value being brought to from 5 to 6 by the addition of triethanolamine. After initial condensation the pH is increased to from 7 to 8 and the solution evaporated to a thick syrup. A non- aqueous solvent such as butyl alcohol or the monomethyl ether of ethylene glycol is added and the boiling continued, additional urea being introduced to combine with the remaining free formaldehyde. The final ratio of formaldehyde to urea should be less than 2 : 1, preferably 1.75: 1. Sufficient of a solution in alcohol of a polybasic acid-polyhydric alcohol is then added to lower the pH value to between 3.5 and 5, and the mixture is dried by heating in vacuo. The resulting powder may be moulded under pressure and finally cured by heating without pressure. Part of the urea in the process may be replaced by thiourea.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1315629A GB337357A (en) | 1929-04-27 | 1929-04-27 | An improved process for the production of urea aldehyde resins |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1315629A GB337357A (en) | 1929-04-27 | 1929-04-27 | An improved process for the production of urea aldehyde resins |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB337357A true GB337357A (en) | 1930-10-27 |
Family
ID=10017891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1315629A Expired GB337357A (en) | 1929-04-27 | 1929-04-27 | An improved process for the production of urea aldehyde resins |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB337357A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE750605C (en) * | 1939-03-12 | 1945-01-23 | Process for the preparation of condensation products from alkyl resins, formaldehyde and dicyandiamide | |
| CN112759470A (en) * | 2020-12-31 | 2021-05-07 | 广西易多收生物科技有限公司 | Preparation method of fulvic acid medicinal fertilizer |
-
1929
- 1929-04-27 GB GB1315629A patent/GB337357A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE750605C (en) * | 1939-03-12 | 1945-01-23 | Process for the preparation of condensation products from alkyl resins, formaldehyde and dicyandiamide | |
| CN112759470A (en) * | 2020-12-31 | 2021-05-07 | 广西易多收生物科技有限公司 | Preparation method of fulvic acid medicinal fertilizer |
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