GB313615A - Manufacture of condensation products from formaldehyde, thiourea and urea - Google Patents

Manufacture of condensation products from formaldehyde, thiourea and urea

Info

Publication number
GB313615A
GB313615A GB18377/29A GB1837729A GB313615A GB 313615 A GB313615 A GB 313615A GB 18377/29 A GB18377/29 A GB 18377/29A GB 1837729 A GB1837729 A GB 1837729A GB 313615 A GB313615 A GB 313615A
Authority
GB
United Kingdom
Prior art keywords
thiourea
formaldehyde
urea
evaporation
solution
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
GB18377/29A
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.)
BASF Schweiz AG
Original Assignee
Gesellschaft fuer Chemische Industrie in Basel CIBA
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
Priority claimed from DEG67971D external-priority patent/DE612625C/en
Priority claimed from DEG73636D external-priority patent/DE621360C/en
Application filed by Gesellschaft fuer Chemische Industrie in Basel CIBA filed Critical Gesellschaft fuer Chemische Industrie in Basel CIBA
Publication of GB313615A publication Critical patent/GB313615A/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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Medicines Containing Plant Substances (AREA)

Abstract

313,615. Soc. of Chemical Industry in Basle. June 15, 1928, [Convention date]. Addition to 275,995. Condensation products of urea and thiourea with formaldehyde.-In the process of the parent Specification, the solution obtained by addition of thiourea or a mixture of thiourea and urea to the primary condensation solution is worked up by evaporation only after the greater part of the free formaldehyde present has been fixed by standing at approximately neutral reaction and at ordinary or slightly raised temperature. The products obtained by evaporation are particularly stable, and varnishes prepared therefrom are fast to water. According to the examples, urea is mixed with formaldehyde solution and blood charcoal, then filtered and heated for some hours in an autoclave; the condensation product is exactly neutralized to litmus with caustic soda, mixed with thiourea and then either allowed to stand for some days or gently heated for some hours, whereby the formaldehyde content is reduced to small proportions; the product can then be worked up into a varnish or other material by evaporation.
GB18377/29A 1926-08-11 1929-06-14 Manufacture of condensation products from formaldehyde, thiourea and urea Expired GB313615A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CH275995X 1926-08-11
DEG67971D DE612625C (en) 1926-08-13 1926-08-13 Process for the production of clear condensation products from formaldehyde, urea and thiourea
CH23924X 1928-06-15
DEG73636D DE621360C (en) 1926-08-13 1928-06-18 Process for the production of clear condensation products from formaldehyde, urea and thiourea

Publications (1)

Publication Number Publication Date
GB313615A true GB313615A (en) 1930-09-15

Family

ID=41068353

Family Applications (1)

Application Number Title Priority Date Filing Date
GB18377/29A Expired GB313615A (en) 1926-08-11 1929-06-14 Manufacture of condensation products from formaldehyde, thiourea and urea

Country Status (1)

Country Link
GB (1) GB313615A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004065446A1 (en) * 2003-01-24 2004-08-05 Pigmentech Ltd. Condensed urea-formaldehyde compositions and method for production of the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004065446A1 (en) * 2003-01-24 2004-08-05 Pigmentech Ltd. Condensed urea-formaldehyde compositions and method for production of the same

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