FR2112172A1 - Refractory shell mould - by alternately coating a support with sols of electrically charged colloids and hardeners - Google Patents

Refractory shell mould - by alternately coating a support with sols of electrically charged colloids and hardeners

Info

Publication number
FR2112172A1
FR2112172A1 FR7122866A FR7122866A FR2112172A1 FR 2112172 A1 FR2112172 A1 FR 2112172A1 FR 7122866 A FR7122866 A FR 7122866A FR 7122866 A FR7122866 A FR 7122866A FR 2112172 A1 FR2112172 A1 FR 2112172A1
Authority
FR
France
Prior art keywords
organic
hardener
salt
colloidal particles
support
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.)
Granted
Application number
FR7122866A
Other languages
French (fr)
Other versions
FR2112172B1 (en
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.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and 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 EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Priority to FR7122866A priority Critical patent/FR2112172A1/en
Publication of FR2112172A1 publication Critical patent/FR2112172A1/en
Application granted granted Critical
Publication of FR2112172B1 publication Critical patent/FR2112172B1/fr
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J13/00—Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided for; Making microcapsules or microballoons
    • B01J13/0052—Preparation of gels
    • B01J13/0056—Preparation of gels containing inorganic material and water
    • B01J13/006—Preparation of gels containing inorganic material and water by precipitation, coagulation, hydrolyse coacervation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J13/00—Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided for; Making microcapsules or microballoons
    • B01J13/0052—Preparation of gels
    • B01J13/0065—Preparation of gels containing an organic phase
    • 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
    • B22C1/165—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 in the manufacture of multilayered shell moulds

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Dispersion Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Paints Or Removers (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Colloid Chemistry (AREA)

Abstract

Successive coatings are rapidly applied to a support by immersion in baths containing (1) a sol. of positively or negatively charged inorganic colloidal particles or (2) a solution of an ionic alkali metal silicate followed by a bath of an oppositely charged hardener. For a positive coating the hardener is (a) negatively charged inorganic colloidal particles (b) ionic alkali metal silicate (c) monofunctional organic (6-24C alkyl) acid or salt (d) (in)organic base (e) (in)organic polyfunctional acid or salt or (f) a latex of an anionic surface active agent. For a negative or silicate coating the hardener is (g) positively charged inorganic colloidal particles (h) organic cationic non-polymeric nitrogen cpds. (i) a latex of organic polymer stabilised with cationic surface active agent (j) a basic Al salt Alx(OH)yAz (where x is 1-8, y is 1-20, z is 1-4 and A is acid anion) or (k) a polycationic organic substance. The moulds are free from microfractures and more accurate and are used for lost wax metal moulding processes.
FR7122866A 1971-06-23 1971-06-23 Refractory shell mould - by alternately coating a support with sols of electrically charged colloids and hardeners Granted FR2112172A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7122866A FR2112172A1 (en) 1971-06-23 1971-06-23 Refractory shell mould - by alternately coating a support with sols of electrically charged colloids and hardeners

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7122866A FR2112172A1 (en) 1971-06-23 1971-06-23 Refractory shell mould - by alternately coating a support with sols of electrically charged colloids and hardeners

Publications (2)

Publication Number Publication Date
FR2112172A1 true FR2112172A1 (en) 1972-06-16
FR2112172B1 FR2112172B1 (en) 1974-05-31

Family

ID=9079139

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7122866A Granted FR2112172A1 (en) 1971-06-23 1971-06-23 Refractory shell mould - by alternately coating a support with sols of electrically charged colloids and hardeners

Country Status (1)

Country Link
FR (1) FR2112172A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2999103A1 (en) * 2012-12-07 2014-06-13 Salis Neuville COMPOSITION FOR REALIZING A CARAPLE OF A PERISHED WAX MOLD
CN111132754A (en) * 2017-10-13 2020-05-08 巴斯夫欧洲公司 Core-shell expansion agent and use thereof in cement systems
CN115894059A (en) * 2022-11-28 2023-04-04 航天特种材料及工艺技术研究所 Short-period preparation process method of fiber-reinforced silicon dioxide composite ceramic material

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2999103A1 (en) * 2012-12-07 2014-06-13 Salis Neuville COMPOSITION FOR REALIZING A CARAPLE OF A PERISHED WAX MOLD
CN111132754A (en) * 2017-10-13 2020-05-08 巴斯夫欧洲公司 Core-shell expansion agent and use thereof in cement systems
CN111132754B (en) * 2017-10-13 2022-12-02 巴斯夫欧洲公司 Core-shell expansion agent and use thereof in cement systems
CN115894059A (en) * 2022-11-28 2023-04-04 航天特种材料及工艺技术研究所 Short-period preparation process method of fiber-reinforced silicon dioxide composite ceramic material
CN115894059B (en) * 2022-11-28 2024-04-02 航天特种材料及工艺技术研究所 Short-period preparation process method of fiber reinforced silica composite ceramic material

Also Published As

Publication number Publication date
FR2112172B1 (en) 1974-05-31

Similar Documents

Publication Publication Date Title
US3900614A (en) Method of depositing a metal on a surface of a substrate
US3873360A (en) Method of depositing a metal on a surface of a substrate
GB807302A (en) Improvements in or relating to method of improving a refractory article
GB1461566A (en) Presensitised lithographic plates
FR2112172A1 (en) Refractory shell mould - by alternately coating a support with sols of electrically charged colloids and hardeners
US3860476A (en) Method of forming refractory laminates
GB913637A (en) Metal casting process
DK418183A (en) PRODUCTS AND PROCESSES FOR PLANOGRAPHIC PRINTING
NL7108726A (en) Refractory shell mould - by alternately coating a support with sols of electrically charged colloids and hardeners
GB1065354A (en) Improvements in fortification of anodized surfaces
US3754945A (en) Refractory laminate based on negative sols or silicates and polycationic organic compounds
GB1514075A (en) Process for the production of an adhering metal oxide coating on a solid body
GB1517549A (en) Coating articles with thermosetting materials
GB1317329A (en) Anodic electrodeposition process
GB986934A (en)
GB1338631A (en) Refractory laminates and their preparation
GB1316604A (en) Catalyst for sulphuric acid contact process
JPS61127900A (en) Composite plating method
US3873358A (en) Method of depositing a metal on a surface of a substrate
GB1415173A (en) Process for encapsulating articles
Miller Electrostatic coating
US2428798A (en) Hydrocarbon conversion in presence of gel catalysts
JPH01245880A (en) Method for coating rare-earth element magnet
GB1473161A (en)
GB952573A (en) Protective coating for aluminium

Legal Events

Date Code Title Description
ST Notification of lapse