GB261029A - Improvements in the manufacture and production of condensation products of urea and formaldehyde - Google Patents

Improvements in the manufacture and production of condensation products of urea and formaldehyde

Info

Publication number
GB261029A
GB261029A GB27912/26A GB2791226A GB261029A GB 261029 A GB261029 A GB 261029A GB 27912/26 A GB27912/26 A GB 27912/26A GB 2791226 A GB2791226 A GB 2791226A GB 261029 A GB261029 A GB 261029A
Authority
GB
United Kingdom
Prior art keywords
urea
formaldehyde
condensation
dimethylol
employed
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
GB27912/26A
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.)
IG Farbenindustrie AG
Original Assignee
IG Farbenindustrie AG
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 IG Farbenindustrie AG filed Critical IG Farbenindustrie AG
Publication of GB261029A publication Critical patent/GB261029A/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

261,029. I. G. Farbenindustrie Akt.- Ges. Nov. 7, 1925, [Convention date]. Urea-formaldehyde condensation products.-In the production of urea-formaldehyde condensation products, the urea and formaldehyde comprising the starting materials are replaced by dimethylolurea, and the condensation is effected in an organic solvent in the absence of water using an acid condensing agent. Dimethylol-urea is obtained by the action of formaldehyde on urea in alkaline or neutral aqueous solution at ordinary temperature. Organic solvents can then be employed which are less suitable when working with urea and formaldehyde, e.g. methyl or ethyl alcohol, and acetone. A phenol or a mixture of phenols may also be employed as solvent; the formaldehyde liberated during the reaction is fixed by the phenol, thereby permitting of the condensation being carried out directly in casting- moulds. It is advantageous to add resins, plasticizers, talcum, diatomaceous earth, plaster of Paris, or the like. According to the examples, (1) dimethylol-urea is dissolved in hot ethyl alonhol and condensation started by the addition of hydrochloric acid; when the reaction is complete, sodium acetate is added, the alcohol evaporated in vacuo, and the product heated for some time; a hard glass results; (2) dimethylolurea is dissolved in ethylene glycol monoethyl ether and condensed by adding hydrochloric acid; after neutralization with sodium bicarbonate a clear, colourless lacquer is obtained, which may be mixed with diluents or other lacquers. The Specification as open to inspection under Sect. 91 (3) (a) states also that, in place of dimethylol-urea, products of higher molecular weight resulting from the condensation of urea and formaldehyde with splitting off of water may be employed, as well as analogous compounds obtainable from other aldehydes and urea or its derivatives. This subject-matter does not appear in the Specification as accepted.
GB27912/26A 1925-11-07 1926-11-06 Improvements in the manufacture and production of condensation products of urea and formaldehyde Expired GB261029A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE261029T 1925-11-07
GB13404/28A GB319251A (en) 1925-11-07 1928-05-07 Improvements in the manufacture and production of condensation products of derivatives of urea and aldehydes

Publications (1)

Publication Number Publication Date
GB261029A true GB261029A (en) 1928-05-07

Family

ID=62527949

Family Applications (2)

Application Number Title Priority Date Filing Date
GB27912/26A Expired GB261029A (en) 1925-11-07 1926-11-06 Improvements in the manufacture and production of condensation products of urea and formaldehyde
GB13404/28A Expired GB319251A (en) 1925-11-07 1928-05-07 Improvements in the manufacture and production of condensation products of derivatives of urea and aldehydes

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB13404/28A Expired GB319251A (en) 1925-11-07 1928-05-07 Improvements in the manufacture and production of condensation products of derivatives of urea and aldehydes

Country Status (1)

Country Link
GB (2) GB261029A (en)

Also Published As

Publication number Publication date
GB319251A (en) 1929-09-09

Similar Documents

Publication Publication Date Title
GB636696A (en) Manufacture of a raw material for lacquers from resinous ethylene oxide derivatives of phenols and lacquers made therewith
GB261029A (en) Improvements in the manufacture and production of condensation products of urea and formaldehyde
US1699245A (en) Production of condensation products of methylol compounds of a urea
US2043159A (en) Production of condensation products
GB616463A (en) An improved process for preparing urea formaldehyde lacquer compositions
GB774583A (en) Improvements in or relating to etherified resins
US2333928A (en) Tertiary butyl alcohol-formaldehyde condensation product and method for preparing the same
US1557521A (en) Cyclohexanol-aldehyde resin and process of making the same
GB256248A (en) Improvements in producing resinous condensation products of the urea-formaldehyde type
GB359653A (en) Improvements in the manufacture and production of condensation products
US1039858A (en) Process for producing condensation products from phenols with formic aldehyde.
SU52209A1 (en) The method of obtaining the condensation products of urea or thiourea
US2330179A (en) Hydroxyhalocarbonyl compound and process for producing same
SU57700A1 (en) The method of obtaining plastics and varnish compositions
GB159494A (en) A process for the manufacture of resinous phenol formaldehyde condensation products
GB443324A (en) Improvements in or relating to the production of vinyl derivatives
GB260253A (en)
GB375843A (en) Process for manufacturing condensation products
GB327673A (en) Improvements in the manufacture and production of condensation products of urea or derivatives thereof and formaldehyde
GB349956A (en) Manufacture of new condensation products of formaldehyde with aromatic sulphonamidesand n-aryl derivatives thereof, and their application
GB617506A (en) Improved phenolic resin adhesive
GB454013A (en) Manufacture of acetals of polyvinyl alcohol
GB478988A (en) Improvements in the process of treating phenol condensation products adapted for themanufacturing of phenol-aldehyde resins or products thereof
GB460275A (en) Improvements in the manufacture and production of urea-formaldehyde resins
GB338937A (en) Improved process for the manufacture and production of artificial resins