ES441641A1 - Process for the manufacture of solutions of curable urea-formaldehyde resins - Google Patents
Process for the manufacture of solutions of curable urea-formaldehyde resinsInfo
- Publication number
- ES441641A1 ES441641A1 ES441641A ES441641A ES441641A1 ES 441641 A1 ES441641 A1 ES 441641A1 ES 441641 A ES441641 A ES 441641A ES 441641 A ES441641 A ES 441641A ES 441641 A1 ES441641 A1 ES 441641A1
- Authority
- ES
- Spain
- Prior art keywords
- urea
- solution
- ammonia
- viscosity
- minutes
- 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
- C08G12/043—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with acyclic or carbocyclic compounds with at least two compounds covered by more than one of the groups C08G12/06 - C08G12/24
- C08G12/046—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with acyclic or carbocyclic compounds with at least two compounds covered by more than one of the groups C08G12/06 - C08G12/24 one being 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)
- Laminated Bodies (AREA)
- Medicines Containing Material From Animals Or Micro-Organisms (AREA)
- Polymerisation Methods In General (AREA)
- Materials For Medical Uses (AREA)
- Paper (AREA)
Abstract
Procedure for the preparation of solutions of curable urea and formaldehyde resins, especially for the impregnation and coating of support strips, for the surface ennoblement of wooden material plates, characterized in that a) an aqueous solution of urea is reacted and formaldehyde in a molar ratio of 1: 1.5 to 2.5 in the presence of 0.2 to 1.0 millimole of an aminosulfonic acid and 20 to 100 millimole of ammonia (in each case referred to 1 mole of urea) at temperatures 70 to 95ºC for 10 to 30 minutes, until the 50% solution has a viscosity of 55 to 65 cP at 20ºC; b) then add 0.8 to 10 millimoles of an aminosulfonic acid, maintain a pH value of 4.0 to 4.5 with ammonia for a reaction time of 10 to 25 minutes at 70 to 95ºC, until the 50% solution has a viscosity of 80 to 110 cP at 20ºC, and finally 40 to 200 millimoles of ammonia as well as 0.1 to 0.3 mol of urea, and the reaction mixture are added to this reaction product c) it is reacted at a temperature of 70 to 95ºC for 15 to 45 minutes, until the 50% solution has a viscosity of 85 to 125 cP at 20ºC. (Machine-translation by Google Translate, not legally binding)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2448472A DE2448472C3 (en) | 1974-10-11 | 1974-10-11 | Process for the production of solutions of urea-formaldehyde impregnating resins |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES441641A1 true ES441641A1 (en) | 1977-04-01 |
Family
ID=5928060
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES441641A Expired ES441641A1 (en) | 1974-10-11 | 1975-10-09 | Process for the manufacture of solutions of curable urea-formaldehyde resins |
Country Status (11)
| Country | Link |
|---|---|
| AT (1) | AT348260B (en) |
| BE (1) | BE834032A (en) |
| CS (1) | CS196288B2 (en) |
| DD (1) | DD120454A5 (en) |
| DE (1) | DE2448472C3 (en) |
| ES (1) | ES441641A1 (en) |
| FR (1) | FR2287459A1 (en) |
| GB (1) | GB1513409A (en) |
| HU (1) | HU170828B (en) |
| NO (1) | NO140674C (en) |
| SE (1) | SE426495B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2734638C2 (en) * | 1977-08-01 | 1982-12-30 | Th. Goldschmidt Ag, 4300 Essen | Process for the production of solutions of curable urea-formaldehyde resins for the impregnation and coating of carrier webs for the surface treatment of wood-based panels |
| DE2825590C2 (en) | 1978-06-10 | 1983-05-05 | Th. Goldschmidt Ag, 4300 Essen | Process for the production of thermosetting urea-formaldehyde resins and their use |
| CH648570A5 (en) * | 1981-10-26 | 1985-03-29 | Sika Ag | POLYCONDENSATION PRODUCT. |
| GB2192005B (en) * | 1986-06-27 | 1989-12-13 | Ciba Geigy Ag | Process for the preparation of urea-formaldehyde resins |
-
1974
- 1974-10-11 DE DE2448472A patent/DE2448472C3/en not_active Expired
-
1975
- 1975-09-30 BE BE160559A patent/BE834032A/en not_active IP Right Cessation
- 1975-10-08 NO NO75753400A patent/NO140674C/en unknown
- 1975-10-09 DD DD188772A patent/DD120454A5/xx unknown
- 1975-10-09 ES ES441641A patent/ES441641A1/en not_active Expired
- 1975-10-10 AT AT775275A patent/AT348260B/en not_active IP Right Cessation
- 1975-10-10 SE SE7511396A patent/SE426495B/en not_active IP Right Cessation
- 1975-10-10 GB GB41702/75A patent/GB1513409A/en not_active Expired
- 1975-10-10 FR FR7531040A patent/FR2287459A1/en active Granted
- 1975-10-10 CS CS756862A patent/CS196288B2/en unknown
- 1975-10-10 HU HU75GO00001323A patent/HU170828B/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE2448472A1 (en) | 1976-04-22 |
| DE2448472B2 (en) | 1979-01-11 |
| HU170828B (en) | 1977-09-28 |
| FR2287459B1 (en) | 1978-04-07 |
| NO753400L (en) | 1976-04-13 |
| NO140674B (en) | 1979-07-09 |
| DE2448472C3 (en) | 1979-08-30 |
| FR2287459A1 (en) | 1976-05-07 |
| NO140674C (en) | 1979-10-31 |
| AT348260B (en) | 1979-02-12 |
| CS196288B2 (en) | 1980-03-31 |
| SE7511396L (en) | 1976-04-12 |
| GB1513409A (en) | 1978-06-07 |
| SE426495B (en) | 1983-01-24 |
| BE834032A (en) | 1976-01-16 |
| DD120454A5 (en) | 1976-06-12 |
| ATA775275A (en) | 1978-06-15 |
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