FR2274378A1 - Phenol-formaldehyde novolak binder for foundry sand - contg. urea cpd for increased build up and cure rates of moulds and cores - Google Patents

Phenol-formaldehyde novolak binder for foundry sand - contg. urea cpd for increased build up and cure rates of moulds and cores

Info

Publication number
FR2274378A1
FR2274378A1 FR7420835A FR7420835A FR2274378A1 FR 2274378 A1 FR2274378 A1 FR 2274378A1 FR 7420835 A FR7420835 A FR 7420835A FR 7420835 A FR7420835 A FR 7420835A FR 2274378 A1 FR2274378 A1 FR 2274378A1
Authority
FR
France
Prior art keywords
moulds
cores
urea
contg
phenol
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.)
Withdrawn
Application number
FR7420835A
Other languages
French (fr)
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.)
OPC INT Inc
Original Assignee
OPC INT Inc
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 OPC INT Inc filed Critical OPC INT Inc
Priority to FR7420835A priority Critical patent/FR2274378A1/en
Publication of FR2274378A1 publication Critical patent/FR2274378A1/en
Withdrawn legal-status Critical Current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

A resin coated sand, for foundry cores and moulds, comprises (a) particles of sand coated with 1-8, pref. 1-6 wt.% of P-F novalak resin, (b) curing agent, pref. hexaomethylene tetramine, and (c) 115, pref. 1.5-3.5 wt. % ( on P-F resin) of a urea cpd. selected from (ethylene) urea and/or propylene urea. The incorpn. of (c) increases the build up rate and cure rate of the coated sand and both the invest time and cure time can be reduced in the mfr. of cores and moulds by the shell process. Hot and cold tensile strength of cores and moulds are increased.
FR7420835A 1974-06-14 1974-06-14 Phenol-formaldehyde novolak binder for foundry sand - contg. urea cpd for increased build up and cure rates of moulds and cores Withdrawn FR2274378A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7420835A FR2274378A1 (en) 1974-06-14 1974-06-14 Phenol-formaldehyde novolak binder for foundry sand - contg. urea cpd for increased build up and cure rates of moulds and cores

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7420835A FR2274378A1 (en) 1974-06-14 1974-06-14 Phenol-formaldehyde novolak binder for foundry sand - contg. urea cpd for increased build up and cure rates of moulds and cores

Publications (1)

Publication Number Publication Date
FR2274378A1 true FR2274378A1 (en) 1976-01-09

Family

ID=9140111

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7420835A Withdrawn FR2274378A1 (en) 1974-06-14 1974-06-14 Phenol-formaldehyde novolak binder for foundry sand - contg. urea cpd for increased build up and cure rates of moulds and cores

Country Status (1)

Country Link
FR (1) FR2274378A1 (en)

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Legal Events

Date Code Title Description
ST Notification of lapse