GB463764A - Improvements in or relating to the manufacture of luminescent bodies - Google Patents

Improvements in or relating to the manufacture of luminescent bodies

Info

Publication number
GB463764A
GB463764A GB14994/36A GB1499436A GB463764A GB 463764 A GB463764 A GB 463764A GB 14994/36 A GB14994/36 A GB 14994/36A GB 1499436 A GB1499436 A GB 1499436A GB 463764 A GB463764 A GB 463764A
Authority
GB
United Kingdom
Prior art keywords
mass
formaldehyde
urea
luminescent substances
relating
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
GB14994/36A
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.)
FRANCAISE HELITA Ste
Original Assignee
FRANCAISE HELITA Ste
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 FRANCAISE HELITA Ste filed Critical FRANCAISE HELITA Ste
Publication of GB463764A publication Critical patent/GB463764A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
    • C08K5/0041—Optical brightening agents, organic pigments

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

In the preparation of luminous urea-formaldehyde bodies where, after the initial reaction of the urea and the formaldehyde, acidification is effected by adding an anhydride in admixture with an alcohol and boiling off the alcohol in vacuo at a moderate temperature, the luminescent substances are introduced in powdery form after the initial reaction but before or during the boiling, whereby they are distributed regularly in the mass. The mass may be centrifuged to distribute the luminescent substances on the surface of the body. If easily destructible luminescent substances are employed, the grains thereof may be coated with a semi - liquid formaldehyde - urea condensate before their introduction into the mass. Specification 420,317 is referred to.
GB14994/36A 1935-05-27 1936-05-27 Improvements in or relating to the manufacture of luminescent bodies Expired GB463764A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR463764X 1935-05-27

Publications (1)

Publication Number Publication Date
GB463764A true GB463764A (en) 1937-04-06

Family

ID=8901949

Family Applications (1)

Application Number Title Priority Date Filing Date
GB14994/36A Expired GB463764A (en) 1935-05-27 1936-05-27 Improvements in or relating to the manufacture of luminescent bodies

Country Status (1)

Country Link
GB (1) GB463764A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1120044B (en) * 1955-10-26 1961-12-21 Roehm & Haas Gmbh Method of stabilizing fine metal powders
US5794009A (en) * 1996-05-09 1998-08-11 Eagle Research Corp. Multiple protocol management system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1120044B (en) * 1955-10-26 1961-12-21 Roehm & Haas Gmbh Method of stabilizing fine metal powders
US5794009A (en) * 1996-05-09 1998-08-11 Eagle Research Corp. Multiple protocol management system

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