GB792574A - Phenolic resins and their use in moulding processes - Google Patents

Phenolic resins and their use in moulding processes

Info

Publication number
GB792574A
GB792574A GB1611655A GB1611655A GB792574A GB 792574 A GB792574 A GB 792574A GB 1611655 A GB1611655 A GB 1611655A GB 1611655 A GB1611655 A GB 1611655A GB 792574 A GB792574 A GB 792574A
Authority
GB
United Kingdom
Prior art keywords
resin
sand
phenol
formaldehyde
solvent
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
GB1611655A
Inventor
Eric Smith
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.)
Monsanto Chemicals Ltd
Original Assignee
Monsanto Chemicals 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 Monsanto Chemicals Ltd filed Critical Monsanto Chemicals Ltd
Priority to GB1611655A priority Critical patent/GB792574A/en
Publication of GB792574A publication Critical patent/GB792574A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
    • B22C1/16—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents
    • B22C1/20—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of organic agents
    • B22C1/22—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of organic agents of resins or rosins
    • B22C1/2233—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of organic agents of resins or rosins obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • B22C1/2246—Condensation polymers of aldehydes and ketones
    • B22C1/2253—Condensation polymers of aldehydes and ketones with phenols

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Mold Materials And Core Materials (AREA)

Abstract

Sand particles are coated with a phenolic resin prepared by condensing phenol and formaldehyde in a mol. ratio of from 1 : 1.3 to 1 : 1.5 in the presence of ammonia, by dissolving the resin in a solvent, e.g. methylated spirits, mixing with sand and evaporating off the solvent. In Example 2, a resin prepared by condensing together phenol, aqueous formaldehyde, aqueous ammonia and caustic soda was dissolved in methylated spirits, sand being added and the solvent evaporated at 65 DEG C. The slightly aggregated product was slightly ground with pestle and mortar. The resulting product may be used in the preparation of shell moulds.ALSO:A composition for use in shell moulding processes comprises a mixture of a finely-divided refractory material and a phenolic resin, prepared by the condensation of phenol and formaldehyde in the proportion of 1 mol. phenol to from 1.3 to 1.5 mols. of formaldehyde in the presence of ammonia. Specified refractory materials are sand, sillimanite or fireclay. Resin of a sufficiently small particle size can be mixed directly with the refractory material or the resin can be dissolved in a solvent, e.g. methylated spirits and mixed with the refractory, the solvent being removed by evaporation. In the examples: (1) phenol, aqueous formaldehyde, aqueous ammonia and sodium hydroxide were mixed and heated, the liquid resin being allowed to cool and solidify and then crushed. The resin then being mixed with sand; (2) the resin of Example (1) was dissolved in methylated spirits, sand added and the solvent evaporated at 65 DEG C. The product was lightly ground. Examples 4 and 5 describe the preparation of shell moulds from the compositions by conventional processes.ALSO:Finely divided refractory material, e.g., sand, sillimanite or fireclay is mixed with a phenolic resin prepared by the condensation of phenol and formaldehyde in a mol ratio of from 1 : 1,3 to 1 : 1,5 in the presence of ammonia to produce shell moulding compositions.
GB1611655A 1955-06-06 1955-06-06 Phenolic resins and their use in moulding processes Expired GB792574A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1611655A GB792574A (en) 1955-06-06 1955-06-06 Phenolic resins and their use in moulding processes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1611655A GB792574A (en) 1955-06-06 1955-06-06 Phenolic resins and their use in moulding processes

Publications (1)

Publication Number Publication Date
GB792574A true GB792574A (en) 1958-04-02

Family

ID=10071464

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1611655A Expired GB792574A (en) 1955-06-06 1955-06-06 Phenolic resins and their use in moulding processes

Country Status (1)

Country Link
GB (1) GB792574A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3306864A (en) * 1962-11-29 1967-02-28 Hooker Chemical Corp Phenol formaldehyde-urea resin component binder
DE2413925A1 (en) * 1973-03-22 1974-09-26 Lignyte Co Ltd Process for the production of resin-coated refractory granular masses, in particular molding sand
CN105414457A (en) * 2015-11-23 2016-03-23 合肥李诺新材料贸易有限公司 Efficient modified alkaline phenolic resin self-hardening sand for thin-walled pump valve casting and preparation method of efficient modified alkaline phenolic resin self-hardening sand

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3306864A (en) * 1962-11-29 1967-02-28 Hooker Chemical Corp Phenol formaldehyde-urea resin component binder
DE2413925A1 (en) * 1973-03-22 1974-09-26 Lignyte Co Ltd Process for the production of resin-coated refractory granular masses, in particular molding sand
CN105414457A (en) * 2015-11-23 2016-03-23 合肥李诺新材料贸易有限公司 Efficient modified alkaline phenolic resin self-hardening sand for thin-walled pump valve casting and preparation method of efficient modified alkaline phenolic resin self-hardening sand

Similar Documents

Publication Publication Date Title
GB571920A (en) Improvements in or relating to moulding compositions containing phenol aldehyde resins
US4366303A (en) Particulate resoles with improved cure rate and sinter resistance
GB792574A (en) Phenolic resins and their use in moulding processes
GB768125A (en) Improvements in or relating to resinous compositions comprising a glycidyl polyetherand a phenol-formaldehyde resin
US2915491A (en) Phenolic resins and their use in moulding processes
GB623271A (en) Improvements relating to the manufacture of synthetic resinous compositions
US1938078A (en) Artificial dispersion of rubber
GB663013A (en) Improvements in or relating to methods of preparation of inorganic oxide aquasols and the inorganic oxide aquasols resulting from said methods
US2007987A (en) Process of producing molded articles from urea or its derivatives and solid polymeric aldehydes
GB562590A (en) Improvements relating to the production of moulding powders containing synthetic resins
GB131112A (en) Improvements in Phenol Formaldehyde Condensation Products and the Manufacture thereof.
GB625576A (en) Improvements in or relating to synthetic resinous compositions and to products formed therefrom
GB581940A (en) Improvements in or relating to liquid coating compositions
GB680800A (en) Improvements in or relating to resinous compositions
GB380007A (en) Process for the manufacture of nitrate of lime in globular form
GB806871A (en) Cation exchange resins suitable for medicinal use
GB439777A (en) Process for the preparation of dry rubber in finely divided solid condition by spraying latex in a drying atmosphere
GB753163A (en) Improvements in or relating to moulding core sand compositions containing synthetic resins
US2321208A (en) Organic solution of formaldehydeurea reaction product
GB773547A (en) Resol resins
GB772801A (en) Non-dusting powders and the manufacture thereof
GB435179A (en) Improvements in and relating to the manufacture of moulding or coating compounds
GB763812A (en) Improvements in or relating to the manufacture of synthetic resin pre-coated foundrysands for the purpose of shell moulding
GB853766A (en) Improved moulding compositions
GB260080A (en) Process for the manufacture of a powder for moulding into articles