GB271264A - An improved process for the manufacture of transparent and colourless condensation products of urea and solid polymers of formaldehyde - Google Patents

An improved process for the manufacture of transparent and colourless condensation products of urea and solid polymers of formaldehyde

Info

Publication number
GB271264A
GB271264A GB1567626A GB1567626A GB271264A GB 271264 A GB271264 A GB 271264A GB 1567626 A GB1567626 A GB 1567626A GB 1567626 A GB1567626 A GB 1567626A GB 271264 A GB271264 A GB 271264A
Authority
GB
United Kingdom
Prior art keywords
solution
urea
parts
condensation products
formaldehyde
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
GB1567626A
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.)
FRIEDRICH ERNST KARL STEPPES
HIENRICH OTTO TRAUN
Original Assignee
FRIEDRICH ERNST KARL STEPPES
HIENRICH OTTO TRAUN
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 FRIEDRICH ERNST KARL STEPPES, HIENRICH OTTO TRAUN filed Critical FRIEDRICH ERNST KARL STEPPES
Priority to GB1567626A priority Critical patent/GB271264A/en
Publication of GB271264A publication Critical patent/GB271264A/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

271,264. Steppes, F. E. K., and Traun, H. O., (trading as Traun & S÷hne, vorm Harburger Gummi-Kamm-Cie., H.). June 22, 1926. Right to Patent relinquished. Urea-formaldehyde condensation products. - Colourless condensation products suitable for use as glass substitutes are obtained by dissolving urea in an aqueous solution of a formaldehyde polymer of a strength exceeding 40 per cent, boiling the solution for a short time in an open vessel, and hardening the product by further beating at a temperature below 100‹ C. The formaldehydepolymer solution is obtained by the use of suitable reagents, such as ammonia, alkalies, and amines, salts such as formates, acetates, and sulphites, or acids such as hydrochloric and aromatic sulphonic acids, which reagents, particularly if they are capable of affecting the condensation catalytically, are used only in the amount required to produce the solution. In an example, 504 parts of paraformaldehyde are dissolved in 100 parts of 7 per cent ammonia and 200-240 parts of water, and 480 parts of urea are dissolved in the solution. The solution, after heating to boiling in an open vessel for about ten minutes, gives a viscous product which, prior to hardening, may be mixed with soluble dyes or with insoluble pigments and filling materials.
GB1567626A 1926-06-22 1926-06-22 An improved process for the manufacture of transparent and colourless condensation products of urea and solid polymers of formaldehyde Expired GB271264A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1567626A GB271264A (en) 1926-06-22 1926-06-22 An improved process for the manufacture of transparent and colourless condensation products of urea and solid polymers of formaldehyde

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1567626A GB271264A (en) 1926-06-22 1926-06-22 An improved process for the manufacture of transparent and colourless condensation products of urea and solid polymers of formaldehyde

Publications (1)

Publication Number Publication Date
GB271264A true GB271264A (en) 1927-05-26

Family

ID=10063411

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1567626A Expired GB271264A (en) 1926-06-22 1926-06-22 An improved process for the manufacture of transparent and colourless condensation products of urea and solid polymers of formaldehyde

Country Status (1)

Country Link
GB (1) GB271264A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2453869A1 (en) * 1979-04-09 1980-11-07 Charbonnages Ste Chimique Urea!-formaldehyde! precondensate prodn. from solid formaldehyde - in presence of water and under specific reaction conditions of pH and reactants ratio

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2453869A1 (en) * 1979-04-09 1980-11-07 Charbonnages Ste Chimique Urea!-formaldehyde! precondensate prodn. from solid formaldehyde - in presence of water and under specific reaction conditions of pH and reactants ratio

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