WO1983000568A1 - Materiaux photochromiques - Google Patents

Materiaux photochromiques Download PDF

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Publication number
WO1983000568A1
WO1983000568A1 PCT/GB1982/000231 GB8200231W WO8300568A1 WO 1983000568 A1 WO1983000568 A1 WO 1983000568A1 GB 8200231 W GB8200231 W GB 8200231W WO 8300568 A1 WO8300568 A1 WO 8300568A1
Authority
WO
WIPO (PCT)
Prior art keywords
photochromic
toluene
colour
irradiation
clay
Prior art date
Application number
PCT/GB1982/000231
Other languages
English (en)
Inventor
Overseas Limited Plessey
Original Assignee
Heller, Harlod, George
Trundle, Clive
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 Heller, Harlod, George, Trundle, Clive filed Critical Heller, Harlod, George
Publication of WO1983000568A1 publication Critical patent/WO1983000568A1/fr

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D11/00—Inks
    • C09D11/50—Sympathetic, colour changing or similar inks
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/38—Coatings with pigments characterised by the pigments
    • D21H19/40—Coatings with pigments characterised by the pigments siliceous, e.g. clays
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C1/00—Photosensitive materials
    • G03C1/72—Photosensitive compositions not covered by the groups G03C1/005 - G03C1/705
    • G03C1/73—Photosensitive compositions not covered by the groups G03C1/005 - G03C1/705 containing organic compounds

Definitions

  • the present invention relates to photochromic materials and more particularly to photochromic clays, pigments, powder plastic (e.g. finely divided CR39 glass or polyester glass) in which a photochromic compound is incorporated in the clay, pigment, plastic powder or other material e.g. silica gel.
  • photochromic clays, pigments, powder plastic e.g. finely divided CR39 glass or polyester glass
  • powder plastic e.g. finely divided CR39 glass or polyester glass
  • a photochromic compound is incorporated in the clay, pigment, plastic powder or other material e.g. silica gel.
  • the present invention provides a photochromic material for incorporation into an end product including a finely divided substance in which a photochromic compound is added to the finely divided substance prior to incorporation of the photochromic material into the end product.
  • Photochromic compound may for the purpose of the present invention include one or more compounds which are combined to produce a desired effect.
  • An end product may be a photochromic paper wherein the photochromic material is introduced either as a bulk material during manufacture of the paper or as a surface coating subsequent to manufacture of the paper.
  • the finely divided substance into which the photochromic compound is added is a clay.
  • the clays exemplified in the subsequent description are usually white or near white fine powders.
  • photochromic compounds are mixed with clays they are surprisingly found to exhibit a colour change in that the frequency of maximum absorbance moves towards the red end of the spectrum and therefore the photochromic clays appear more blue than the photochromic material on filter paper or in solution.
  • the invention therefore also provides a photochromic clay including a clay into which a photochromic compound has been mixed, in which the frequency of maximum absorbance for such a photochromic clay has been shifted towards the red end of the spectrum.
  • Such photochromic clays can be used as surface coatings on paper and the shift in frequency response may enable LED's to be used to change the colour of the photochromic material from one state to another thereby rendering possible the use of photochromic materials for photocopying and/or data storage.
  • Such photochromic clays because they are white or pale yellow in their uncoloured state may also be incorporated into a plastic medium. The present invention will now be described, by way of example with reference to a number of examples of incorporation of photochromic materials into various clays, pigments and powder plastic.
  • Barium titanite BaTiO 3 0.5 g of A was heated in toluene with 2g barium titanate for 30 minutes. The sample was filtered, washed with toluene, and air dried. Irradiation of the solid at 366nm gave a pink colour which was rapidly reversed on exposure to white light.
  • Photochromic material compound B as shown in Figure 2 will now be considered.
  • Bentonite as used with compound A After 2 hours the sample showed no colour change on exposure to uv radiation.
  • Fumed Silica, (SiO 2 ), Fumed Titania (TiO 2 ), Fumed Alumina (AI 2 O 3 ) and Talc (CaCO 3 ) were also found not to be suitable even though a number of methods of introducing the photochromic were tried. It should be noted that all materials are white or near white prior to incorporation and that materials prior to irradiation are white. Incorporated materials prior to irradiation are white, near white or pale yellow. Colour changes are indicated. Photochromic materials could be recoloured.
  • the advantage of producing a photochromic material in which a finely divided substance is mixed with a photochromic compound is that the material may be added to for example the surface layer of a paper in predetermined quantities to produce a desired tint.
  • the addition of two or more photochromic materials in various chosen quantities can produce a wide range of colours.
  • Each photochromic compound therefore receives the same illumination. This is in contrast to other incorporation methods such as spraying or imbibation where one photochromic material may be positioned on top of another and may be a change of colour to a more absorbent form affect the performance of the second photochromic compound.
  • the photochromic compound or compounds are incorporated into clays two unexpected effects are produced . Firstly as explained hereinbefore a shift in the wavelength of maximum absorbency is produced. This therefore extends the range of colours available. Secondly the absorption of a photochromic compound into a clay is observed to slow down the bleaching response of the compound. This feature can be used for copying applications when the photochromic clay is used as a surface layer on a paper or in a plastics material. Optical printing and laser beam writing become possible because of the wavelength shift into the longer wavelengths of light emitting diodes (LED's). As an alternative the photochromic clay may be used in ink as a filler and the ink printed on a surface such that the printing is photochromic.
  • LED's light emitting diodes
  • photochromic compounds A to E other photochromic compounds may be used such as those described in British Patents No's 1,464,603 and 2002752 and U.S. Patent No 4,220,708.

Abstract

Des matériaux photochromiques sont produits en ajoutant un composé photochromique à une poudre finement divisée. Le matériau ainsi produit peut être ajouté à des articles en tant que couche de surface permettant ainsi de répartir régulièrement sur toute la surface le composé photochromique. Lorsque la poudre finement divisée est composée d'argile, l'on peut observer un changement de la couleur du matériau photochromique.
PCT/GB1982/000231 1981-08-01 1982-07-27 Materiaux photochromiques WO1983000568A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8123616 1981-08-01
GB8123616810801 1981-08-01

Publications (1)

Publication Number Publication Date
WO1983000568A1 true WO1983000568A1 (fr) 1983-02-17

Family

ID=10523636

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1982/000231 WO1983000568A1 (fr) 1981-08-01 1982-07-27 Materiaux photochromiques

Country Status (3)

Country Link
EP (1) EP0085064A1 (fr)
GB (1) GB2104539A (fr)
WO (1) WO1983000568A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0136837A2 (fr) * 1983-09-07 1985-04-10 THE PLESSEY COMPANY plc Articles plastiques héliochromiques
EP0070631B1 (fr) * 1981-07-16 1985-09-11 Ecc International Limited Stabilisation de composés photochromiques, ainsi que l'utilisation de ces composés stabilisés
EP0190016A2 (fr) * 1985-01-24 1986-08-06 Gec-Marconi Limited 3-Pyrryl fulgides et fulgimides photochromiques
EP0239376A2 (fr) * 1986-03-27 1987-09-30 Gec-Marconi Limited Photolithographie avec augmentation du contraste
EP0248631A1 (fr) * 1986-06-03 1987-12-09 Gec-Marconi Limited Butyrolactones gamma photochromes
WO1988001288A1 (fr) * 1986-08-22 1988-02-25 The Plessey Company Plc Marquage d'articles a l'aide de composes photochromiques
EP0327788A2 (fr) * 1988-01-12 1989-08-16 Sicpa Holding S.A. Encres d'imprimerie à photochromisme réversible
WO2007005354A3 (fr) * 2005-07-01 2007-11-29 3Dtl Inc Systemes et procedes pour creer des effets optiques sur des supports

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB993944A (en) * 1961-05-02 1965-06-02 Huber Corp J M Colored pigments
GB1000531A (en) * 1961-05-24 1965-08-04 Huber Corp J M Colored pigments
USB415845I5 (fr) * 1971-02-16 1975-01-28
US4012232A (en) * 1974-12-23 1977-03-15 Nori Y. C. Chu Stabilized photochromic materials
US4220708A (en) * 1977-07-22 1980-09-02 Heller Harold G Photochromic compounds

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB993944A (en) * 1961-05-02 1965-06-02 Huber Corp J M Colored pigments
GB1000531A (en) * 1961-05-24 1965-08-04 Huber Corp J M Colored pigments
USB415845I5 (fr) * 1971-02-16 1975-01-28
US4012232A (en) * 1974-12-23 1977-03-15 Nori Y. C. Chu Stabilized photochromic materials
US4220708A (en) * 1977-07-22 1980-09-02 Heller Harold G Photochromic compounds

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0070631B1 (fr) * 1981-07-16 1985-09-11 Ecc International Limited Stabilisation de composés photochromiques, ainsi que l'utilisation de ces composés stabilisés
EP0136837A2 (fr) * 1983-09-07 1985-04-10 THE PLESSEY COMPANY plc Articles plastiques héliochromiques
EP0136837A3 (en) * 1983-09-07 1986-03-26 The Plessey Company Plc Heliochromic plastics articles
EP0190016A2 (fr) * 1985-01-24 1986-08-06 Gec-Marconi Limited 3-Pyrryl fulgides et fulgimides photochromiques
EP0190016A3 (en) * 1985-01-24 1987-09-02 The Plessey Company Plc Photochromic 3-pyrryl fulgides & fulgimides
EP0239376A3 (fr) * 1986-03-27 1988-05-11 Gec-Marconi Limited Photolithographie avec augmentation du contraste
EP0239376A2 (fr) * 1986-03-27 1987-09-30 Gec-Marconi Limited Photolithographie avec augmentation du contraste
US4942113A (en) * 1986-03-27 1990-07-17 Plessey Overseas Limited Contrast enhanced photolithography
EP0248631A1 (fr) * 1986-06-03 1987-12-09 Gec-Marconi Limited Butyrolactones gamma photochromes
WO1988001288A1 (fr) * 1986-08-22 1988-02-25 The Plessey Company Plc Marquage d'articles a l'aide de composes photochromiques
EP0327788A2 (fr) * 1988-01-12 1989-08-16 Sicpa Holding S.A. Encres d'imprimerie à photochromisme réversible
EP0327788A3 (en) * 1988-01-12 1990-02-14 Sicpa Holding S.A. Reversibly photochromic printing inks
US5630869A (en) * 1988-01-12 1997-05-20 Sicipa Holding S.A. Reversibly photochromic printing inks
US8110281B2 (en) 2004-07-02 2012-02-07 3Dtl, Inc. Systems and methods for creating optical effects on media
US8840983B2 (en) 2004-07-02 2014-09-23 3Dtl, Inc. Systems and methods for creating optical effects on media
US9844968B2 (en) 2004-07-02 2017-12-19 3Dtl, Inc. Systems and methods for creating optical effects on media
WO2007005354A3 (fr) * 2005-07-01 2007-11-29 3Dtl Inc Systemes et procedes pour creer des effets optiques sur des supports
EP2322580A1 (fr) * 2005-07-01 2011-05-18 3DTL, Inc. Systèmes et procédés pour créer des effets optiques sur des supports pour prévenir la contrefaçon

Also Published As

Publication number Publication date
GB2104539A (en) 1983-03-09
EP0085064A1 (fr) 1983-08-10

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