GB998156A - Nacreous material containing titanium dioxide - Google Patents

Nacreous material containing titanium dioxide

Info

Publication number
GB998156A
GB998156A GB300062A GB300062A GB998156A GB 998156 A GB998156 A GB 998156A GB 300062 A GB300062 A GB 300062A GB 300062 A GB300062 A GB 300062A GB 998156 A GB998156 A GB 998156A
Authority
GB
United Kingdom
Prior art keywords
film
platelets
thickness
titanium dioxide
cellulose nitrate
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
GB300062A
Inventor
Harold Abe Miller
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.)
Mearl Corp
Original Assignee
Mearl Corp
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 Mearl Corp filed Critical Mearl Corp
Priority to GB300062A priority Critical patent/GB998156A/en
Publication of GB998156A publication Critical patent/GB998156A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
    • C09C1/0015—Pigments exhibiting interference colours, e.g. transparent platelets of appropriate thinness or flaky substrates, e.g. mica, bearing appropriate thin transparent coatings
    • C09C1/0018—Pigments exhibiting interference colours, e.g. transparent platelets of appropriate thinness or flaky substrates, e.g. mica, bearing appropriate thin transparent coatings uncoated and unlayered plate-like particles

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Laminated Bodies (AREA)
  • Glass Compositions (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

Nacre-producing titanium dioxide platelets having a thickness not greater than 750 millimicrons, a ratio of length to thickness of at least four to one and an index of refraction at least 0.2 greater than that of any light transmitting medium in which they are subsequently suspended are prepared by depositing on a surface a substrate film which is soluble in a solvent which does not dissolve said platelets, depositing on said film another film of a solution of a titanium ester having alkyl groups containing up to 12 carbon atoms, removing the solvent from said solution, hydrolysing the titanium ester film in an atmosphere having a relative humidity of between 20-60%, thereby forming a film having a thickness not greater than 0.75 micron, removing the substrate film and hydrolysed film from said surface, separating one film from the other, and fracturing said hydrolysed film, thereby forming the titanium dioxide platelets. The preferred particle size of a platelet is a thickness of less than 100 millimicrons and a length of between 2 and 100 microns. The refractive index of the platelets is at least 1.9 and it may be increased to the range 2.4-2.9 by heating the platelets to a temperature in the range of 300-800 DEG C. In a typical example, a cellulose nitrate film was formed on a glass plate and a coating of a 10% solution of tetrabutyl titanate in mineral spirits was deposited thereon. The films were separated from each other by immersion of the plate in water, stripping the two films from the plate and dissolving the nitrocellulose substrate film using butyl acetate and the titanium dioxide film was fractured to obtain platelets.ALSO:A nacreous composition comprises titanium dioxide platelets suspended in a light transmitting medium, e.g. casein plastics, cellulose nitrate, methyl methacrylate, each of said titanium dioxide platelets having a thickness not greater than 750 millimicrons, a ratio of length of thickness of at least four to one and an index of refraction at least 0.2 greater than of said suspending medium. A cellulose nitrate lacquer comprises 8% cellulose nitrate in butyl acetate and a platelet concentration therein of from 0.25 --> 5.0%. A methyl methacrylate casting syrup comprises methyl methacrylate containing 0.5% of the platelets. The latter may be cast into sheet form using acetyl peroxide as catalyst, and buttons may be cut from said sheet.ALSO:A nacreous composition comprises titanium dioxide platelets suspended in a light transmitting medium, each of said titanium dioxide platelets having a thickness not greater than 750 millimicrons, a ratio of length to thickness of at least four to one and an index of refraction at least 0.2 greater than that of said suspending medium. The titanium dioxide platelets may be prepared by depositing a smooth substrate film, which is soluble in a solvent which does not dissolve said titanium dioxide platelets, on a clean surface, and over said substrate film, depositing a film of a solution of a titanium ester having alkyl groups containing up to 12 carbon atoms, removing the solvent from said solution, and hydrolysing said film in an atmosphere having a relative humidity of between 20-60%, thereby forming a film having a thickness not greater than 0.75 micron, removing the substrate and hydrolysed film from said surface, separating the substrate from the hydrolysed film, and then fracturing said hydrolysed film to form platelets. The refractive index of the platelets may be improved to between 2.4 and 2.9 by heating to a temperature in the range of from 300 DEG C. to 800 DEG C. The platelets may be incorporated into a cellulose nitrate lacquer which is used to coat glass beads to produce simulated pearls or they may be suspended in a methyl methacrylate casting syrup from which pearl-like buttons may be produced.ALSO:Glass beads are coated by dipping with a lacquer comprising cellulose nitrate having titanium dioxide platelets suspended therein, each platelet having a thickness not greater than 750 millimicrons, a ratio of length to thickness of at least four to one and a refractive index at least 0,2 greater than the suspending medium to produce simulated pearls.
GB300062A 1962-09-13 1962-09-13 Nacreous material containing titanium dioxide Expired GB998156A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB300062A GB998156A (en) 1962-09-13 1962-09-13 Nacreous material containing titanium dioxide

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB300062A GB998156A (en) 1962-09-13 1962-09-13 Nacreous material containing titanium dioxide

Publications (1)

Publication Number Publication Date
GB998156A true GB998156A (en) 1965-07-14

Family

ID=9750053

Family Applications (1)

Application Number Title Priority Date Filing Date
GB300062A Expired GB998156A (en) 1962-09-13 1962-09-13 Nacreous material containing titanium dioxide

Country Status (1)

Country Link
GB (1) GB998156A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2439810A1 (en) * 1978-10-26 1980-05-23 Mearl Corp METAL OXIDE GLITTERS USEFUL AS PEARLS PIGMENTS AND PROCESS FOR THEIR PREPARATION

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2439810A1 (en) * 1978-10-26 1980-05-23 Mearl Corp METAL OXIDE GLITTERS USEFUL AS PEARLS PIGMENTS AND PROCESS FOR THEIR PREPARATION

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