GB476608A - Improvements in or relating to the manufacture of urea-formaldehyde condensation products - Google Patents

Improvements in or relating to the manufacture of urea-formaldehyde condensation products

Info

Publication number
GB476608A
GB476608A GB1656236A GB1656236A GB476608A GB 476608 A GB476608 A GB 476608A GB 1656236 A GB1656236 A GB 1656236A GB 1656236 A GB1656236 A GB 1656236A GB 476608 A GB476608 A GB 476608A
Authority
GB
United Kingdom
Prior art keywords
urea
acid
acetic acid
condensation
boiled
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
Application number
GB1656236A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
British Xylonite Co Ltd
Original Assignee
British Xylonite Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by British Xylonite Co Ltd filed Critical British Xylonite Co Ltd
Priority to GB1656236A priority Critical patent/GB476608A/en
Publication of GB476608A publication Critical patent/GB476608A/en
Expired legal-status Critical Current

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

Abstract

Glass-clear urea-aldehyde condensation products are obtained by carrying out the first stage of the condensation of urea or a urea derivative with formaldehyde in the presence of a condensing agent consisting of a sulphite which does not give rise to insoluble products and carrying out the second stage under weakly acid conditions by addition to the reaction mixture of between 1,3 and 7,25 mols. of acid per 100 mols. of urea or urea derivative. Specified sulphites are those of sodium, potassium, calcium, barium, strontium and zinc, and they may be added in amounts between 0,8 and 4 per cent of the initial weight of urea or urea derivative. Acetic acid is a suitable acid. Softening-agents, e.g. diethylene glycol, glycerol, &c., may be added at any time before or during the condensation and in amounts up to 25 per cent of the urea taken. In examples I--III, urea, aqueous formaldehyde and sodium sulphite are boiled under reflux for 5 minutes, acidified with glacial acetic acid, boiled for a further 5 minutes, dehydrated under vacuum, and the viscous liquid then poured into moulds and allowed to gelatinize at 70--80 DEG C. and maintained at this temperature until quite hard. In example IV, urea, aqueous formaldehyde and sodium sulphite are heated and boiled under reflux for one minute and then allowed to cool slowly to room temperature to obtain a thick, white, paste-like mass which is filtered, washed with alcohol, dried, melted at 60 DEG C. and refluxed with acetic acid, with or without glycerol, and further worked up as before.
GB1656236A 1936-06-13 1936-06-13 Improvements in or relating to the manufacture of urea-formaldehyde condensation products Expired GB476608A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1656236A GB476608A (en) 1936-06-13 1936-06-13 Improvements in or relating to the manufacture of urea-formaldehyde condensation products

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1656236A GB476608A (en) 1936-06-13 1936-06-13 Improvements in or relating to the manufacture of urea-formaldehyde condensation products

Publications (1)

Publication Number Publication Date
GB476608A true GB476608A (en) 1937-12-13

Family

ID=10079542

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1656236A Expired GB476608A (en) 1936-06-13 1936-06-13 Improvements in or relating to the manufacture of urea-formaldehyde condensation products

Country Status (1)

Country Link
GB (1) GB476608A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2492510A (en) * 1945-04-24 1949-12-27 Monsanto Chemicals Amino-aldehyde adhesives
US2612483A (en) * 1947-10-03 1952-09-30 Libbey Owens Ford Glass Co Formaldehyde-urea adhesives and coating compounds
DE911436C (en) * 1943-02-26 1954-05-13 Basf Ag Process for the production of condensation products
DE968737C (en) * 1943-11-20 1958-03-27 Boehme Fettchemie G M B H Process for the production of insoluble and non-meltable synthetic resins with sulfonate groups

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE911436C (en) * 1943-02-26 1954-05-13 Basf Ag Process for the production of condensation products
DE968737C (en) * 1943-11-20 1958-03-27 Boehme Fettchemie G M B H Process for the production of insoluble and non-meltable synthetic resins with sulfonate groups
US2492510A (en) * 1945-04-24 1949-12-27 Monsanto Chemicals Amino-aldehyde adhesives
US2612483A (en) * 1947-10-03 1952-09-30 Libbey Owens Ford Glass Co Formaldehyde-urea adhesives and coating compounds

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