GB597726A - A process for the manufacture of a granular amine-aldehyde moulding composition - Google Patents
A process for the manufacture of a granular amine-aldehyde moulding compositionInfo
- Publication number
- GB597726A GB597726A GB21762/45A GB2176245A GB597726A GB 597726 A GB597726 A GB 597726A GB 21762/45 A GB21762/45 A GB 21762/45A GB 2176245 A GB2176245 A GB 2176245A GB 597726 A GB597726 A GB 597726A
- Authority
- GB
- United Kingdom
- Prior art keywords
- aldehyde
- resin
- vessel
- formaldehyde
- mixtures
- 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
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/12—Powdering or granulating
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2361/00—Characterised by the use of condensation polymers of aldehydes or ketones; Derivatives of such polymers
- C08J2361/20—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Reinforced Plastic Materials (AREA)
Abstract
A process for the manufacture of granulated amine-aldehyde resin moulding compositions comprises introducing into a vessel the resin-forming ingredients in an aqueous medium, adding a filler such as wood pulp, a -cellulose, paper, cotton, canvas, asbestos or other natural or synthetic fibres or mixtures thereof, p condensing the resin-forming ingredients in the vessel while stirring, continuing the stirring until the filler is impregnated with the reaction product, and stirring the mass while drying in the vessel and granulating the dried mass in the vessel. The amine-aldehyde resins are acid-curing thermosetting resins such as aminotriazinealdehyde, dicyandiamide aldehyde, melamine-modified dicyandiamide-urea-aldehyde, melamine-urea-formaldehyde, alkylated urea aldehyde and alkylated melamine-aldehyde resins or mixtures of these resins. The aldehyde is preferably formaldehyde or its polymers, but acetaldehyde, propionaldehyde, butyraldehyde, acrolein, methacrolein, crotonaldehyde and mixtures of these or mixtures of these aldehydes with formaldehyde. The temperature of the initial reaction is about 40-50 DEG C. and not exceeding 60 DEG C. The pH is maintained above 5.8, that of the final product being 5.8-7.0, preferably about 6.5, and the drying temperature is kept preferably below 60 DEG C. A latent catalyst, comprising 1-3 per cent of the weight of the resin is preferably formed in situ before or during the condensation by reacting at least a portion of the aldehyde from which the resin is prepared with a salt of an alkaline amino compound to form a complex salt which decomposes at moulding temperatures to yield an acid. The process is carried out in a vessel having a hinged cover and fitted with a pair of rotatable serrated sigma blades. The reaction temperature is regulated by a water jacket and an air intake and exhaust fan circulate air through the reaction mass, which may be dried by passing air or other gases through. In the examples: (1) a urea formaldehyde resin was prepared in the presence of a complex salt formed from ammonium hydroxide and sheeted, bleached paper pulp added as the filler; (2) the procedure of example 1 was followed, except that the final drying was carried out in an apron drier; (3) a melamine-formaldehyde resin moulding composition was prepared and (4) the procedure of example 3 was carried out with the addition of a water soluble colouring matter during the mixing. Apparatus for carrying out the process, is also described (see Group II).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US597726XA | 1944-08-30 | 1944-08-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB597726A true GB597726A (en) | 1948-02-02 |
Family
ID=22025118
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB21762/45A Expired GB597726A (en) | 1944-08-30 | 1945-08-24 | A process for the manufacture of a granular amine-aldehyde moulding composition |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB597726A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3376239A (en) * | 1965-06-07 | 1968-04-02 | Gerhard F. Pfeiffer | Process of manufacturing aminoplast molding powder |
US5100936A (en) * | 1988-12-22 | 1992-03-31 | Bip Chemicals Limited | Cellulose fiber filled aminoplast resin compositions for flame retarding polyurethane foams |
-
1945
- 1945-08-24 GB GB21762/45A patent/GB597726A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3376239A (en) * | 1965-06-07 | 1968-04-02 | Gerhard F. Pfeiffer | Process of manufacturing aminoplast molding powder |
US5100936A (en) * | 1988-12-22 | 1992-03-31 | Bip Chemicals Limited | Cellulose fiber filled aminoplast resin compositions for flame retarding polyurethane foams |
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