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GB1305128A - - Google Patents

Info

Publication number
GB1305128A
GB1305128A GB5613570A GB5613570A GB1305128A GB 1305128 A GB1305128 A GB 1305128A GB 5613570 A GB5613570 A GB 5613570A GB 5613570 A GB5613570 A GB 5613570A GB 1305128 A GB1305128 A GB 1305128A
Authority
GB
United Kingdom
Prior art keywords
urea
formaldehyde
solution
weight
zone
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
GB5613570A
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 SE16469/69A external-priority patent/SE338866B/xx
Application filed filed Critical
Publication of GB1305128A publication Critical patent/GB1305128A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/30—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof by mixing gases into liquid compositions or plastisols, e.g. frothing with air
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2361/00—Characterised by the use of condensation polymers of aldehydes or ketones; Derivatives of such polymers
    • C08J2361/20—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
    • C08J2361/22—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with acyclic or carbocyclic compounds
    • C08J2361/24—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with acyclic or carbocyclic compounds with urea or thiourea

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Phenolic Resins Or Amino Resins (AREA)

Abstract

1305128 Urea-formaldehyde foamed bodies ELECTROLUX AB 25 Nov 1970 [28 Nov 1969 26 March 1970] 56135/70 Headings C3C and C3R Urea-formaldehyde foamed bodies are made by separately feeding into a confined mixing zone having a foam ejection nozzle connected thereto and means for injecting compressed air, two aqueous solutions, the first solution being neutral to alkaline and containing 30 to 50% by weight of a precondensation product of urea with formaldehyde Laving a molar formaldehyde to urea ratio of between 1À8:1 and 22:1 and 10-20 ml./l. of an aqueous solution containing 50% by weight of a sulphite waste liquor on a dry basis, and the second solution containing an acid catalyst or hardener and 2 to 8% by weight of a foaming agent selected from alkyl, aryl and alkylaryl sulphonates. After mixing in the zone, the mix is foamed by compressed air, ejected from the zone via the nozzle and subsequently set. The preferred hardeners are phosphoric, formic and oxalic acids. The first solution may contain a small amount of a foam shrink preventative such as calcium carbonate, and also copper phthalocyanine as a flame-proofing agent. Fillers or extenders such as glass fibres, quartz powder, and asbestos may be added to the first solution. A flow-type diagram of apparatus suitable for carrying out the process is also included in the Specification. The foamed bodies may have densities from 4 to 40 kg./m.<SP>3</SP>
GB5613570A 1969-11-28 1970-11-25 Expired GB1305128A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE16469/69A SE338866B (en) 1969-11-28 1969-11-28
US2285570A 1970-03-26 1970-03-26

Publications (1)

Publication Number Publication Date
GB1305128A true GB1305128A (en) 1973-01-31

Family

ID=26656068

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5613570A Expired GB1305128A (en) 1969-11-28 1970-11-25

Country Status (3)

Country Link
DE (1) DE2057942A1 (en)
FR (1) FR2072655A5 (en)
GB (1) GB1305128A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111050902A (en) * 2017-08-21 2020-04-21 Otex公司 Absorbents and equipment for preparing them

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3129813C2 (en) * 1981-07-29 1983-12-29 Bergwerksverband Gmbh, 4300 Essen Process for the formation of urea-formaldehyde foams

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111050902A (en) * 2017-08-21 2020-04-21 Otex公司 Absorbents and equipment for preparing them

Also Published As

Publication number Publication date
FR2072655A5 (en) 1971-09-24
DE2057942A1 (en) 1971-06-16

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees