GB627167A - Improvements in and relating to the production of resinous compositions of matter, and the products resulting therefrom - Google Patents

Improvements in and relating to the production of resinous compositions of matter, and the products resulting therefrom

Info

Publication number
GB627167A
GB627167A GB1890547A GB1890547A GB627167A GB 627167 A GB627167 A GB 627167A GB 1890547 A GB1890547 A GB 1890547A GB 1890547 A GB1890547 A GB 1890547A GB 627167 A GB627167 A GB 627167A
Authority
GB
United Kingdom
Prior art keywords
gms
urea
mole
formaldehyde
melamine
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
GB1890547A
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.)
REGINALD WILLIAM HENRY WICKING
British Resin Products Ltd
Original Assignee
REGINALD WILLIAM HENRY WICKING
British Resin Products Ltd
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 REGINALD WILLIAM HENRY WICKING, British Resin Products Ltd filed Critical REGINALD WILLIAM HENRY WICKING
Priority to GB1890547A priority Critical patent/GB627167A/en
Publication of GB627167A publication Critical patent/GB627167A/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
    • C08G12/26—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with heterocyclic compounds
    • C08G12/34—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with heterocyclic compounds and acyclic or carbocyclic compounds
    • C08G12/36—Ureas; Thioureas
    • C08G12/38—Ureas; Thioureas and melamines
    • 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

An initial aqueous mixture of a first portion of urea and formaldehyde containing more than 2.25 (preferably not more than 10) of formaldehyde per mole of urea is heated under acidic conditions until equilibrium is reached (shown by the attainment of maximum viscosity); it is then neutralised with alkali, and a second portion of urea added in one step in sufficient amount to give the desired formaldehyde/urea ratio. It is then heated further as desired, and dehydrated to give the product the desired water content. Part of the first portion of urea and/or the whole or part of the second portion may be replaced by an equivalent amount of thiourea and/or melamine. In examples (1) 1 mole. urea and 2.5 moles. formaldehyde, pH3, are refluxed for 30 minutes, the pH is then adjusted to 7.5 by sodium hydroxide, 0.25 mole. of urea is added and the mixture dehydrated under reduced pressure to a viscosity of 35 poises at 25 DEG C. Admixture with a hardener such as ammonium chloride provides an adhesive suitable for hot or cold press bonding of plywood. In other examples: (2) 1 mole. of urea and 4 moles. of formaldehyde are initially reacted and 1 mole. of urea added later; (3) 90 gms. of urea and 30 gms. of thiourea reacted with 410 gms. of 37 per cent formalin and 30 gms. of urea added later; (4) 105 gms. of urea and 15 gms. of melamine reacted with 410 gms. of 37 per cent formalin and 30 gms. of urea added later; (5) 90 gms. of urea and 30 gms. of melamine reacted with 410 gms. of 37 per cent formalin and 30 gms. of urea added later; (6) 75 gms. of urea and 45 gms. of melamine reacted with 410 gms. of 37 per cent formalin and 30 gms. of melamine added later. The products may be used as glues, adhesives with the usual hardener, and in lacquers or moulding compositions. Specification 345,935, and U.S.A. Specification 2,019,453 are referred to. The Provisional Specification describes also the inclusion in the reaction mixture of primary aliphatic alcohols having one to four carbon atoms, and the removal of water from the mixture by azeotropic distillation.
GB1890547A 1947-07-16 1947-07-16 Improvements in and relating to the production of resinous compositions of matter, and the products resulting therefrom Expired GB627167A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1890547A GB627167A (en) 1947-07-16 1947-07-16 Improvements in and relating to the production of resinous compositions of matter, and the products resulting therefrom

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1890547A GB627167A (en) 1947-07-16 1947-07-16 Improvements in and relating to the production of resinous compositions of matter, and the products resulting therefrom

Publications (1)

Publication Number Publication Date
GB627167A true GB627167A (en) 1949-08-02

Family

ID=10120429

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1890547A Expired GB627167A (en) 1947-07-16 1947-07-16 Improvements in and relating to the production of resinous compositions of matter, and the products resulting therefrom

Country Status (1)

Country Link
GB (1) GB627167A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2917427A (en) * 1955-12-14 1959-12-15 Monsanto Chemicals Thermosetting resins and high wet strength papers prepared therefrom
EP0062389A1 (en) * 1981-04-07 1982-10-13 METHANOL CHEMIE NEDERLAND V.o.F. Manufacture of particle board and a novel suitable bonding agent
WO2005113625A1 (en) * 2004-05-19 2005-12-01 Basf Aktiengesellschaft Amino resin for the production of binding agents

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2917427A (en) * 1955-12-14 1959-12-15 Monsanto Chemicals Thermosetting resins and high wet strength papers prepared therefrom
EP0062389A1 (en) * 1981-04-07 1982-10-13 METHANOL CHEMIE NEDERLAND V.o.F. Manufacture of particle board and a novel suitable bonding agent
WO2005113625A1 (en) * 2004-05-19 2005-12-01 Basf Aktiengesellschaft Amino resin for the production of binding agents

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