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GB187605A - New or improved process for the manufacture of condensation products from urea and formaldehyde - Google Patents

New or improved process for the manufacture of condensation products from urea and formaldehyde

Info

Publication number
GB187605A
GB187605A GB28212/22A GB2821222A GB187605A GB 187605 A GB187605 A GB 187605A GB 28212/22 A GB28212/22 A GB 28212/22A GB 2821222 A GB2821222 A GB 2821222A GB 187605 A GB187605 A GB 187605A
Authority
GB
United Kingdom
Prior art keywords
urea
formaldehyde
manufacture
new
condensation products
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
GB28212/22A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB187605A publication Critical patent/GB187605A/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)
  • Phenolic Resins Or Amino Resins (AREA)

Abstract

Turbid materials, resembling meerschaum and porcelain, are produced by condensing urea with not more than 120 per cent of formaldehyde in the presence of at least 3 per cent of acid, the proportions being calculated on the pure anhydrous material in each case. The products are easily worked, and being porous, may be impregnated with colouring solutions, oils, resins, salt solutions, etc. Examples are given in which urea is dissolved in formaldehyde solution, the solution heated to effervescence, nitric, sulphuric or hydrochloric acid then added, and the whole finally emptied into moulds.
GB28212/22A 1921-10-17 1922-10-17 New or improved process for the manufacture of condensation products from urea and formaldehyde Expired GB187605A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE187605X 1921-10-17

Publications (1)

Publication Number Publication Date
GB187605A true GB187605A (en) 1923-07-19

Family

ID=5720467

Family Applications (1)

Application Number Title Priority Date Filing Date
GB28212/22A Expired GB187605A (en) 1921-10-17 1922-10-17 New or improved process for the manufacture of condensation products from urea and formaldehyde

Country Status (1)

Country Link
GB (1) GB187605A (en)

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