GB591943A - Improvements in optical polarizing sheets - Google Patents

Improvements in optical polarizing sheets

Info

Publication number
GB591943A
GB591943A GB18063/43A GB1806343A GB591943A GB 591943 A GB591943 A GB 591943A GB 18063/43 A GB18063/43 A GB 18063/43A GB 1806343 A GB1806343 A GB 1806343A GB 591943 A GB591943 A GB 591943A
Authority
GB
United Kingdom
Prior art keywords
sheet
silicate
ethylene dichloride
polarizing
penetrant
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
GB18063/43A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB591943A publication Critical patent/GB591943A/en
Expired legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
    • D06M13/50—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with organometallic compounds; with organic compounds containing boron, silicon, selenium or tellurium atoms
    • D06M13/503—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with organometallic compounds; with organic compounds containing boron, silicon, selenium or tellurium atoms without bond between a carbon atom and a metal or a boron, silicon, selenium or tellurium atom
    • D06M13/507—Organic silicon compounds without carbon-silicon bond

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Treatments Of Macromolecular Shaped Articles (AREA)

Abstract

A polyvinyl acetal polarizing sheet is protected against the action of heat and light, and is prevented from shrinking, by treating it with a liquid comprising an organic ester of silicic acid and effecting condensation polymerization of the ester on or within the sheet, volatile products used or formed in the process being removed. The sheet may be formed of polyvinyl butyral, rendered polarizing by stretching and treatment with an iodine compound such as HI. The protective liquid may comprise tetra ethyl orthosilicate and a penetrant such as ethylene dichloride, the latter causing swelling of the sheet and rendering it receptive to the silicate. Alternatively, alcohol may be used as the penetrant. After the sheet has been dipped in the ethyl silicate-ethylene dichloride mixture it is dipped into a 2 per cent solution of HCl in water saturated with ethylene dichloride to cause condensation between the polyvinyl butyral and the silicate. After removal of the excess of reagents by a solvent which does not attack the sheet, the sheet is dried. It may subsequently be heated to increase its stability. Polarizing properties lost during the process may be restored by treating the sheet with an intensifying solution containing propyl alcohol, iodine, and hydriodic acid. Alternatively, ethyl silicate may be added to the intensification solution, impregnation and intensification being carried out simultaneously.
GB18063/43A 1942-04-21 1943-11-01 Improvements in optical polarizing sheets Expired GB591943A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US591943XA 1942-04-21 1942-04-21

Publications (1)

Publication Number Publication Date
GB591943A true GB591943A (en) 1947-09-03

Family

ID=22021403

Family Applications (1)

Application Number Title Priority Date Filing Date
GB18063/43A Expired GB591943A (en) 1942-04-21 1943-11-01 Improvements in optical polarizing sheets

Country Status (1)

Country Link
GB (1) GB591943A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3265777A (en) * 1963-07-29 1966-08-09 Alvin M Marks Light polarizing film and fibre forming method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3265777A (en) * 1963-07-29 1966-08-09 Alvin M Marks Light polarizing film and fibre forming method

Similar Documents

Publication Publication Date Title
US2445555A (en) Light-polarizing polyvinyl sheet containing polyvinyl compoundboric acid complex
GB1029335A (en) Method of producing an ultraviolet resistant polycarbonate article
GB591943A (en) Improvements in optical polarizing sheets
US2432113A (en) Method of impregnating a polyvinyl polarizing sheet with tetraethyl ortho silicate
GB330265A (en) Improvements in the manufacture of compound sheets of glass and cellulose derivative composition
US2493765A (en) Modification of and shrinkproofing of wools with amines
GB990612A (en) A process for purifying aliphatic glycols
GB716104A (en) Treatment of polyvinyl alcohol fibres to improve their resistance to water and heat
GB580899A (en) Process for drying alcohol-wet polyvinyl alcohol
GB602452A (en) Improvements in or relating to light polarizers or the manufacture thereof
GB321070A (en) Process of fireproofing wood and the like material
GB927809A (en) Improvements in and relating to glycols
AT216748B (en) Process for the compensation of wood soaked with impregnation oils
US3096200A (en) Method of preparing inorganic products
US2917462A (en) Boron-carbon feed stock
GB976002A (en) Process for protecting glass against loss of mechanical strength
GB1066257A (en) A process for treating glass fiber products
FR1228463A (en) Copolymerization under the effect of ultra-violet light, of high solid polymers such as polythene containing peroxy groups
GB460602A (en) A process for waterproofing fibrous materials
US3023125A (en) Process of treating coal tar impregnated wood with a solution of a compound of boron trifluoride
GB719566A (en) Process for modifying the solubility of polymers
GB983668A (en) Hydrocarbon cracking process
GB548759A (en) Improvements in or relating to light polarizers and processes of making same
GB610740A (en) Improvements in or relating to the production of light polarizing material
GB605305A (en) Improvements in the production of regenerated cellulose or sheet material