ES426302A1 - Procedure for the obtaining of formaldehyde-urea condensation products stable to storage. (Machine-translation by Google Translate, not legally binding) - Google Patents

Procedure for the obtaining of formaldehyde-urea condensation products stable to storage. (Machine-translation by Google Translate, not legally binding)

Info

Publication number
ES426302A1
ES426302A1 ES426302A ES426302A ES426302A1 ES 426302 A1 ES426302 A1 ES 426302A1 ES 426302 A ES426302 A ES 426302A ES 426302 A ES426302 A ES 426302A ES 426302 A1 ES426302 A1 ES 426302A1
Authority
ES
Spain
Prior art keywords
formaldehyde
urea
translation
procedure
machine
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
ES426302A
Other languages
Spanish (es)
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 SE
Original Assignee
BASF SE
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 BASF SE filed Critical BASF SE
Publication of ES426302A1 publication Critical patent/ES426302A1/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
    • C08G12/40—Chemically modified polycondensates

Landscapes

  • Chemical & Material Sciences (AREA)
  • General 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)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

Procedure for the production of formaldehyde/urea condensation products stable to storage, which are obtained in a known manner by condensing precondensates of urea and formaldehyde or substances yielding formaldehyde, or mixtures of urea and formaldehyde or substances yielding formaldehyde, the ratio between urea and formaldehyde at 1: 1.3 to 1: 2.8, with bisulfite and sulfite, or substances yielding bisulfite sulphite in an alkaline medium, then condensing them later in a slightly acidic medium, characterized in that during the condensation in in the alkaline region, 0.5 to 10%, based on the weight of the alkali metal bisulfite, of an alkali metal sulphite or the equivalent amount of an alkali metal hydroxide are additionally used. (Machine-translation by Google Translate, not legally binding)
ES426302A 1973-05-15 1974-05-14 Procedure for the obtaining of formaldehyde-urea condensation products stable to storage. (Machine-translation by Google Translate, not legally binding) Expired ES426302A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19732324440 DE2324440A1 (en) 1973-05-15 1973-05-15 Sulphite-modified urea-formaldehyde resins - esp. used as wet/dry strength paper additives

Publications (1)

Publication Number Publication Date
ES426302A1 true ES426302A1 (en) 1976-07-01

Family

ID=5880961

Family Applications (1)

Application Number Title Priority Date Filing Date
ES426302A Expired ES426302A1 (en) 1973-05-15 1974-05-14 Procedure for the obtaining of formaldehyde-urea condensation products stable to storage. (Machine-translation by Google Translate, not legally binding)

Country Status (4)

Country Link
JP (1) JPS5041991A (en)
CH (1) CH592120A5 (en)
DE (1) DE2324440A1 (en)
ES (1) ES426302A1 (en)

Also Published As

Publication number Publication date
CH592120A5 (en) 1977-10-14
JPS5041991A (en) 1975-04-16
DE2324440A1 (en) 1974-12-05

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