GB697791A - Improved process for making moulded articles, in particular boards, of cellulosic material - Google Patents

Improved process for making moulded articles, in particular boards, of cellulosic material

Info

Publication number
GB697791A
GB697791A GB10963/50A GB1096350A GB697791A GB 697791 A GB697791 A GB 697791A GB 10963/50 A GB10963/50 A GB 10963/50A GB 1096350 A GB1096350 A GB 1096350A GB 697791 A GB697791 A GB 697791A
Authority
GB
United Kingdom
Prior art keywords
alkali
boards
aqueous
dust
resin
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
GB10963/50A
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 GB697791A publication Critical patent/GB697791A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L97/00—Compositions of lignin-containing materials
    • C08L97/02—Lignocellulosic material, e.g. wood, straw or bagasse
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L61/00—Compositions of condensation polymers of aldehydes or ketones; Compositions of derivatives of such polymers
    • C08L61/04—Condensation polymers of aldehydes or ketones with phenols only
    • C08L61/06—Condensation polymers of aldehydes or ketones with phenols only of aldehydes with phenols
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L61/00—Compositions of condensation polymers of aldehydes or ketones; Compositions of derivatives of such polymers
    • C08L61/20—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
    • C08L61/22—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with acyclic or carbocyclic compounds
    • C08L61/24—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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L97/00—Compositions of lignin-containing materials
    • C08L97/007—Cork

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)

Abstract

Moulded articles such as boards are obtained by digesting lignocellulosic material such as sawdust, optionally with the addition of barks, pine needles, leaves, straw, dry grass, peat and tans with aqueous alkali to decompose the lignocellulose, the amount of alkali being such that at the end of said treatment the aqueous phase is not alkaline, separating the bulk of the aqueous digestion liquid from the digested solid product, mixing the product with a synthetic resin which is insoluble in water in its finally condensed state and moulding the mixture by applying pressure and heat. 5-50 per cent of cork dust, wood flour, or defibrinated pulp may be added prior to or subsequent to alkali treatment. The resin may be a phenol-or urea-formaldehyde thermosetting resin and may be incorporated in the dry state in solution or dispersion, or dispersed on a filler such as cork dust or leather dust. Asbestos or glass fibres may be used as additional fillers. The boards obtained may be faced with veneers, fibre sheets or metal foils and the surface may be rendered acid-proof, or water-repellent, by means of paraffin emulsions or drying oils.ALSO:Moulded articles such as boards are obtained by digesting lignocellulosic material such as sawdust optionally with the addition of barks, pine needles, leaves, straw, dry grass, peat and tans with aqueous alkali to decompose the lignocellulose, the amount of alkali being such that at the end of said treatment the aqueous phase is not alkaline separating the bulk of the aqueous digestion liquid from the digested solid product, mixing the product with a synthetic resin which is insoluble in water in its finally condensed state and moulding the mixture by applying pressure and heat. Five to 50 per cent of cork dust, wood flour or defibrinated pulp may be added prior to or subsequent to alkali treatment. The resin may be a phenol- or urea-formaldehyde thermosetting resin and may be incorporated in the dry state in solution or dispersion, or dispersed on a filler such as cork dust or leather dust. Asbestos or glass fibres may be used as additional fillers. The boards obtained may be faced with veneers, fibre sheets or metal foils and the surface may be rendered acidproof, or water repellant by means of paraffin emulsions or drying oils.
GB10963/50A 1949-05-09 1950-05-03 Improved process for making moulded articles, in particular boards, of cellulosic material Expired GB697791A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH697791X 1949-05-09

Publications (1)

Publication Number Publication Date
GB697791A true GB697791A (en) 1953-09-30

Family

ID=4529775

Family Applications (1)

Application Number Title Priority Date Filing Date
GB10963/50A Expired GB697791A (en) 1949-05-09 1950-05-03 Improved process for making moulded articles, in particular boards, of cellulosic material

Country Status (1)

Country Link
GB (1) GB697791A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3001902A (en) * 1958-06-23 1961-09-26 Pacific Plywood Co Lignocellulosic tile and method for its manufacture

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3001902A (en) * 1958-06-23 1961-09-26 Pacific Plywood Co Lignocellulosic tile and method for its manufacture

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