Process for producing ammonium polyphosphate which gives a low-viscosity aqueous suspension
Номер патента: CA2021351A1
Опубликовано: 04-02-1991
Автор(ы): Renate Adrian, Thomas Staffel
Принадлежит: Hoechst AG
Опубликовано: 04-02-1991
Автор(ы): Renate Adrian, Thomas Staffel
Принадлежит: Hoechst AG
Реферат: Process for producing ammonium polyphosphate which gives a low-viscosity aqueous suspension Abstract of the disclosure A process for producing essentially water-insoluble, chain-type ammonium polyphosphates of the general formula (NH4PO3)n, in which n is a number from 10 to 1,000, whose 20% by weight aqueous suspension prepared at 60°C has a viscosity of less than 100 mPa.s at 20°C, is indicated, which comprises allowing a reaction mixture of ammonium orthophosphate and phosphorus pentoxide to react fully at a high mixing intensity in a crumbly phase at a tempera-ture from 100 to 300°C over a period of from 10 to 60 minutes and then heat-treating the reaction material in a known manner over a period of from 50 to 200 minutes at a temperature from 200 to 300°C under an ammonia atmos-phere. Advantageously, the reaction is carried out in a kneader.
Use of a stabilizer for producing halogen-free, ammonium polyphosphate-containing flame-retardant coating compositions
Номер патента: US20140212588A1. Автор: Michael Schmitt,Jürgen STRAUB,Thomas Staffel. Владелец: BK GIULINI GMBH. Дата публикации: 2014-07-31.