GB1502979A - Method of joining together bodies of cellulosic material - Google Patents

Method of joining together bodies of cellulosic material

Info

Publication number
GB1502979A
GB1502979A GB38967/75A GB3896775A GB1502979A GB 1502979 A GB1502979 A GB 1502979A GB 38967/75 A GB38967/75 A GB 38967/75A GB 3896775 A GB3896775 A GB 3896775A GB 1502979 A GB1502979 A GB 1502979A
Authority
GB
United Kingdom
Prior art keywords
bodies
polyisocyanate
polymethylenepolyphenylisocyanate
veneer
aqueous 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
GB38967/75A
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.)
Ellingson Timber Co
Original Assignee
Ellingson Timber Co
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 Ellingson Timber Co filed Critical Ellingson Timber Co
Priority to GB38967/75A priority Critical patent/GB1502979A/en
Publication of GB1502979A publication Critical patent/GB1502979A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B32B21/04—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B21/06—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material of paper or cardboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B32B21/14—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood board or veneer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B32B21/02—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board the layer being formed of fibres, chips, or particles, e.g. MDF, HDF, OSB, chipboard, particle board, hardboard
    • 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
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/30—Low-molecular-weight compounds
    • C08G18/302—Water
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
    • C09J175/02—Polyureas
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J5/00—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers
    • C09J5/06—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers involving heating of the applied adhesive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/26—Polymeric coating

Abstract

1502979 Wood panels ELLINGSON TIMBER CO 23 Sept 1975 38967/75 Heading B5L [Also in Division C3] A method of joining together bodies of wooden material, e.g. wood veneer, to produce hardboard and plywood comprises coating said bodies with an organic polyisocyanate and with an aqueous formaldehyde solution, and bringing said bodies into pressure contact and maintaining said contact at an elevated temperature for a time sufficient to form a permanent bond between the bodies. The polyisocyanate is preferably a polyphenylpolyisocyanate, e.g. diphenylmethane - 4,4<SP>1</SP> - diisocyanate. The polyisocyanate and aqueous formaldehyde may be added together as components of an emulsion but are preferably added separately. The weight ratio of polyisocyanate to formaldehyde may be in the range 2 : 3 to 5 : 1 (solids basis), and the binder preferably constitutes 2-5% by weight of the cellulosic material. A veneer-faced particle board is produced by spraying aqueous formaldehyde solution and polymethylenepolyphenylisocyanate on to a mass of pine planar shavings, forming the coated particles into a mat on a fir veneer sheet which has been coated either with polymethylenepolyphenylisocyanate or a phenolformaldehyde resin, placing on top of this mat a second veneer sheet coated with either polymethylenepolyphenylisocyanate, and compressing the resulting sandwich at elevated temperature.
GB38967/75A 1975-09-23 1975-09-23 Method of joining together bodies of cellulosic material Expired GB1502979A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB38967/75A GB1502979A (en) 1975-09-23 1975-09-23 Method of joining together bodies of cellulosic material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB38967/75A GB1502979A (en) 1975-09-23 1975-09-23 Method of joining together bodies of cellulosic material

Publications (1)

Publication Number Publication Date
GB1502979A true GB1502979A (en) 1978-03-08

Family

ID=10406804

Family Applications (1)

Application Number Title Priority Date Filing Date
GB38967/75A Expired GB1502979A (en) 1975-09-23 1975-09-23 Method of joining together bodies of cellulosic material

Country Status (1)

Country Link
GB (1) GB1502979A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2145421A (en) * 1983-08-26 1985-03-27 Seang Ha Park Manufacture of a building element
US5008359A (en) * 1988-11-25 1991-04-16 Weyerhaeuser Company Isocyanate modified cellulose products and method for their manufacture
GB2260138A (en) * 1991-09-30 1993-04-07 Agency Ind Science Techn Biodegradable composite material and process of producing same
US5204176A (en) * 1992-03-03 1993-04-20 The Dow Chemical Company Structural siding composition
NL1025082C2 (en) * 2003-12-19 2005-06-21 Hakhold B V Shelf for indoor use.
CN110527056A (en) * 2019-09-12 2019-12-03 山东农业大学 Wood-based plate bi-component composite adhesive and its application

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2145421A (en) * 1983-08-26 1985-03-27 Seang Ha Park Manufacture of a building element
US5008359A (en) * 1988-11-25 1991-04-16 Weyerhaeuser Company Isocyanate modified cellulose products and method for their manufacture
WO1992003286A1 (en) * 1988-11-25 1992-03-05 Weyerhaeuser Company Isocyanate modified cellulose products and method for their manufacture
GB2260138A (en) * 1991-09-30 1993-04-07 Agency Ind Science Techn Biodegradable composite material and process of producing same
US5204176A (en) * 1992-03-03 1993-04-20 The Dow Chemical Company Structural siding composition
NL1025082C2 (en) * 2003-12-19 2005-06-21 Hakhold B V Shelf for indoor use.
CN110527056A (en) * 2019-09-12 2019-12-03 山东农业大学 Wood-based plate bi-component composite adhesive and its application

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee