GB683630A - Improvements in or relating to urea-melamine-formaldehyde resins - Google Patents
Improvements in or relating to urea-melamine-formaldehyde resinsInfo
- Publication number
- GB683630A GB683630A GB144350A GB144350A GB683630A GB 683630 A GB683630 A GB 683630A GB 144350 A GB144350 A GB 144350A GB 144350 A GB144350 A GB 144350A GB 683630 A GB683630 A GB 683630A
- Authority
- GB
- United Kingdom
- Prior art keywords
- urea
- melamine
- condensate
- until
- mixture
- 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
- C08G12/26—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with heterocyclic compounds
- C08G12/34—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with heterocyclic compounds and acyclic or carbocyclic compounds
- C08G12/36—Ureas; Thioureas
- C08G12/38—Ureas; Thioureas and melamines
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
Stable resin syrups for use as adhesives, impregnants for textiles, paper, &c. are obtained by reacting aqueous formaldehyde at a pH of 3-10 with a mixture of melamine and urea, the urea content being from 5-35 per cent by weight of the mixture, until the condensate obtained has a water tolerance of not less than 3 : 1 at 20 DEG C., concentrating the condensate by dehydration under vacuum until the water removed lies between 10 and 40 per cent by weight of the condensate, and then diluting the concentrated condensate with an alcohol containing not more than 5 carbon atoms until a syrup of desired resin content is obtained. Preferably not less than 2 mols. formaldehyde per mol. urea plus 3 mols. per mol. melamine are employed. The formaldehyde is preferably initially adjusted to a pH of 4-6. The ratio of the volume of water added to the original volume of syrup until the mixture just becomes opalescent gives the water tolerance referred to. Alcohols specified for dilution are methanol, ethanol, propyl, butyl and amyl alcohols. A table is given in the Specification showing the shelf life, viscosity, water tolerance and reaction conditions of condensates obtained by reacting 252 parts of melamine with 40, 60, 40, 120 parts urea and 736, 823, 628, 862 parts formalin respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB144350A GB683630A (en) | 1950-01-19 | 1950-01-19 | Improvements in or relating to urea-melamine-formaldehyde resins |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB144350A GB683630A (en) | 1950-01-19 | 1950-01-19 | Improvements in or relating to urea-melamine-formaldehyde resins |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB683630A true GB683630A (en) | 1952-12-03 |
Family
ID=9722096
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB144350A Expired GB683630A (en) | 1950-01-19 | 1950-01-19 | Improvements in or relating to urea-melamine-formaldehyde resins |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB683630A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005113625A1 (en) * | 2004-05-19 | 2005-12-01 | Basf Aktiengesellschaft | Amino resin for the production of binding agents |
| CN114891468A (en) * | 2022-05-18 | 2022-08-12 | 西南林业大学 | ENF-grade artificial board adhesive and preparation method thereof |
-
1950
- 1950-01-19 GB GB144350A patent/GB683630A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005113625A1 (en) * | 2004-05-19 | 2005-12-01 | Basf Aktiengesellschaft | Amino resin for the production of binding agents |
| CN114891468A (en) * | 2022-05-18 | 2022-08-12 | 西南林业大学 | ENF-grade artificial board adhesive and preparation method thereof |
| CN114891468B (en) * | 2022-05-18 | 2023-08-04 | 西南林业大学 | ENF-grade artificial board adhesive and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB913410A (en) | Decorative overlay sheet for use in decorative moulding | |
| GB683630A (en) | Improvements in or relating to urea-melamine-formaldehyde resins | |
| GB809662A (en) | Stable solutions of water-soluble amino-aldehyde resins | |
| GB919808A (en) | Production of aqueous modified melamine-formaldehyde resinous compositions | |
| GB822929A (en) | Process for the production of stable solutions of hardenable condensation products of melamine, thiourea and formaldehyde | |
| ES258193A1 (en) | Process for the production of a longlasting stable solution of formaldehyde-melaminecondensation products, and the new stable product thereof | |
| US2512671A (en) | Hemi-formalization products of urea-formaldehyde resinous condensates | |
| US2444802A (en) | Nitrogenous resins containing alkylene sulfonate groups | |
| GB629695A (en) | Improvements in or relating to a process for preparing high viscosity polyvinyl alcohol and the high polyvinyl alcohol resulting from said process | |
| GB703426A (en) | Improvements in or relating to urea-melamine-formaldehyde resins | |
| GB889260A (en) | Process for the preparation of stable resin syrups | |
| GB627167A (en) | Improvements in and relating to the production of resinous compositions of matter, and the products resulting therefrom | |
| GB723884A (en) | Improvements in or relating to synthetic resin adhesives | |
| GB1509000A (en) | Composition and process for treating timber | |
| GB650133A (en) | Phenol-modified acetone resins | |
| GB690180A (en) | Improvements in or relating to the production of melamine-formaldehyde condensation products | |
| GB737023A (en) | Solutions containing available formaldehyde | |
| GB855536A (en) | Melamine-formaldehyde polyvinyl alcohol resin and process of preparing same | |
| GB738033A (en) | Improvements in or relating to the preparation of melamine-formaldehyde syrups | |
| GB567063A (en) | Improvements in branched chain guanamine-aldehyde condensation products | |
| GB673809A (en) | Improvements in or relating to the production of chloromethyl methyl ether | |
| GB616463A (en) | An improved process for preparing urea formaldehyde lacquer compositions | |
| GB569042A (en) | Dicyandiamine-aldehyde syrups and processes of producing same | |
| GB617506A (en) | Improved phenolic resin adhesive | |
| GB827371A (en) | Manufacture of stable aqueous dispersions of synthetic resins capable of being hardened |