GB1140416A - Manufacture of daylight projection screens - Google Patents

Manufacture of daylight projection screens

Info

Publication number
GB1140416A
GB1140416A GB12170/67A GB1217067A GB1140416A GB 1140416 A GB1140416 A GB 1140416A GB 12170/67 A GB12170/67 A GB 12170/67A GB 1217067 A GB1217067 A GB 1217067A GB 1140416 A GB1140416 A GB 1140416A
Authority
GB
United Kingdom
Prior art keywords
binder
light
diffusing medium
substrate
transparent
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
GB12170/67A
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.)
Sumitomo Chemical Co Ltd
Original Assignee
Sumitomo Chemical Co 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 Sumitomo Chemical Co Ltd filed Critical Sumitomo Chemical Co Ltd
Publication of GB1140416A publication Critical patent/GB1140416A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/54—Accessories
    • G03B21/56—Projection screens
    • G03B21/60—Projection screens characterised by the nature of the surface
    • G03B21/62—Translucent screens
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/0427—Coating with only one layer of a composition containing a polymer binder
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/043—Improving the adhesiveness of the coatings per se, e.g. forming primers

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Overhead Projectors And Projection Screens (AREA)
  • Optical Elements Other Than Lenses (AREA)

Abstract

1,140,416. Polymerization. SUMITOMO CHEMICAL CO. Ltd. 15 March, 1967 [6 April, 1966], No. 12170/67. Heading C3P. [Also in Divisions B2 and G2] A method of manufacturing a daylight projection screen consists in applying to one surface of a transparent substrate a mixture of a light-diffusing medium, and, either a liquid polymerizable monomer that forms on polymerization a transparent polymer which is a binder for the light-diffusing medium, or a transparent normally solid material which is a binder for the light-diffusing medium dissolved in a solvent, and thereafter causing the monomer to polymerize or the solvent to evaporate, to form a diffusion layer, the difference between the refractive indices of the light-diffusing medium and binder being not less than 0.2 and not greater than 0À3. The substrate may be a sheet of polymethyl methacrylate, and the liquid polymerizable material and the normally solid material may also be this substance. Alternatively the substrate may be of glass, polystyrene, rigid P.V.C. or plasticized P.V.C. for a roll-up screen. Powdered quartz, silica gel, glass, or alumina may be used as the diffusing medium. The diffusion layer contains 0.01 to 0À06% carbon black and about one-fifth this amount of a blue dye such as cyanine blue. Chloroform or methyl ethyl ketone are suitable solvents for the solid binder.
GB12170/67A 1966-04-06 1967-03-15 Manufacture of daylight projection screens Expired GB1140416A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2187566 1966-04-06

Publications (1)

Publication Number Publication Date
GB1140416A true GB1140416A (en) 1969-01-22

Family

ID=12067287

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12170/67A Expired GB1140416A (en) 1966-04-06 1967-03-15 Manufacture of daylight projection screens

Country Status (2)

Country Link
GB (1) GB1140416A (en)
NL (1) NL6704830A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0422620A2 (en) * 1989-10-13 1991-04-17 Sumitomo Chemical Company, Limited Screen for projection
WO2004072722A2 (en) * 2003-01-15 2004-08-26 Saint-Gobain Glass France Projection and/or rear projection screen

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0422620A2 (en) * 1989-10-13 1991-04-17 Sumitomo Chemical Company, Limited Screen for projection
EP0422620A3 (en) * 1989-10-13 1992-05-20 Sumitomo Chemical Company, Limited Screen for projection
WO2004072722A2 (en) * 2003-01-15 2004-08-26 Saint-Gobain Glass France Projection and/or rear projection screen
WO2004072722A3 (en) * 2003-01-15 2005-03-24 Saint Gobain Projection and/or rear projection screen
US7609443B2 (en) 2003-01-15 2009-10-27 Saint-Gobain Glass France Projection and/or rear projection screen
CN1761912B (en) * 2003-01-15 2010-12-01 法国圣戈班玻璃厂 Projection and/or rear projection screen

Also Published As

Publication number Publication date
NL6704830A (en) 1967-10-09

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