DE416753C - Material for the production of optical objects - Google Patents

Material for the production of optical objects

Info

Publication number
DE416753C
DE416753C DEB108195D DEB0108195D DE416753C DE 416753 C DE416753 C DE 416753C DE B108195 D DEB108195 D DE B108195D DE B0108195 D DEB0108195 D DE B0108195D DE 416753 C DE416753 C DE 416753C
Authority
DE
Germany
Prior art keywords
production
optical objects
urea
parts
objects
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
DEB108195D
Other languages
German (de)
Inventor
Dr-Ing Heiner Ramstetter
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.)
BASF SE
Original Assignee
BASF SE
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 BASF SE filed Critical BASF SE
Priority to DEB108195D priority Critical patent/DE416753C/en
Application granted granted Critical
Publication of DE416753C publication Critical patent/DE416753C/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)

Description

material zur Herstellung optischer Gegenstände. Durch Kondensation von Harnstoff oder Harnstoffderivaten mit Formaldehyd oder dessen Polymeren erhält man bei geeigneter Arbeitsweise glasklare Produkte.material for making optical objects. Through condensation obtained from urea or urea derivatives with formaldehyde or its polymers with a suitable working method, you get crystal-clear products.

Es hat sich nun gezeigt, daß diese durch-::ichtigen Produkte zur Herstellung optischer Gegenstände vorzüglich geeignet sind, insbesondere solcher, bei denen es auf weitgehende Purchlässigkeit für ultraviolettes Licht allkommt, da sie diese Lichtart nur wenig absorbieren. Sie sind deshalb als Ersatz für c ptische Gläser, wie z. B. Uviolglas und insbesondere für Quarz, weitgehender Anwendung fällig. ' Zur genauen Kennzeichnung des bean-#;pruchten Materials sei seine Herstellung in einem Ausführungsbeispiel beschrieben.It has now been shown that these through - :: ichtichtigen products for manufacture optical objects are particularly suitable, especially those for which there is a great deal of purchasing for ultraviolet light, since it does so Only absorb a little type of light. They are therefore a substitute for c ptic glasses, such as B. uviol glass and especially for quartz, extensive application due. ' For the precise identification of the claimed material, its manufacture is described in an embodiment described.

Man erwärmt 5 Teile 8oprozentiger Amei->-.ellsäure und 30o Teile 3oprozentigem Form= r:l(leliyd auf 35 bis 4.o° am Rückflußkühler und läßt eine 75° warme Lösung von 6o Teilen Harnstoff in 5o Teilen Wasser zulaufen. Die Mischung kommt zum Sieden, wird noch 'j= bis t/2 Stunde im Kochen erhalten und dann im Vakuum bei 4.o° eingedampft, bis ungefähr die Hälfte des Volumens überdestilliert ist. Die zurückbleibende dicke Lösung wird warm in Formen ausgegossen, in denen sie bald gallertartig erstarrt. Eine auftretende milchige Trübung verschwindet beim Lagern. Sobald das Produkt genügend Festigkeit hat, wird es aus der Form genommen und unter häufigem Wenden einem Trocknungsprozeß bei gewöhnlicher oder mäßig erhöhter Temperatur unterworfen, um ein gleichmäßiges Verdunsten noch vorhandenen und beim Reifungsprozeß abgestoßenen Wassers zu ermöglichen; schließlich hinterbleibt eine klare, farblose, glasartige Masse, die in jeder beliebigen Weise mit Messer, Säge, Hobel, Drehstahl tisiv. mechanisch bearbeitet werden kann und folgende optische Lage zeigt: 5 parts of 8% amine acid and 30 ° parts of 3% form = r: 1 (leliyd to 35 to 40 ° are heated in the reflux condenser and a 75 ° warm solution of 60 parts of urea in 50 parts of water is run in. The mixture When it comes to boiling, it is kept boiling for up to t / 2 hours and then evaporated in vacuo at 40 ° until about half the volume has distilled over. The thick solution that remains is poured warm into molds in which it soon solidified like a gel. Any milky cloudiness that appears disappears on storage. As soon as the product has sufficient strength, it is removed from the mold and subjected to a drying process at an ordinary or moderately elevated temperature, turning it frequently, in order to ensure even evaporation of the water that is still present and expelled during the ripening process Finally, a clear, colorless, glass-like mass remains, which can be tisiv.Mechanisc h can be processed and shows the following optical position:

Claims (1)

PATENTANSPRUCH: Material zur Herstellung optischer Gegenstände, bestehend aus glasklaren Konclensationsprodukten von Harnstoff oder Harnstoffderivaten mit Formaldehyd oder Formaldehyd abspaltenden Stoffen.PATENT CLAIM: Material for the manufacture of optical objects, consisting from crystal-clear condensation products of urea or urea derivatives with Formaldehyde or formaldehyde-releasing substances.
DEB108195D 1923-01-31 1923-01-31 Material for the production of optical objects Expired DE416753C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEB108195D DE416753C (en) 1923-01-31 1923-01-31 Material for the production of optical objects

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB108195D DE416753C (en) 1923-01-31 1923-01-31 Material for the production of optical objects

Publications (1)

Publication Number Publication Date
DE416753C true DE416753C (en) 1925-07-28

Family

ID=6992111

Family Applications (1)

Application Number Title Priority Date Filing Date
DEB108195D Expired DE416753C (en) 1923-01-31 1923-01-31 Material for the production of optical objects

Country Status (1)

Country Link
DE (1) DE416753C (en)

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