Egyt Gyogyszervegyeszeti Gyar

Muanyagipari Kutato Intezet

Finomvegyszer Szovetkezet

Laszlo Magdanyi

Lujza E Petocz

Ibolya Kosoczky

Istvan Kovacsay

Tibor Mezei

Zoltan Budai

Katalin Grasser

Aranka Lay Nee Konya

Eniko Kiszelly

Geza Kecskemethy

Istvan Dubovszky

Ferenc Szailer

Ede Szatmari

Attila Varga

Maria Szajko Nee Lorinczi

The invention is a process for monitored cross-linking of unsaturated polyester resins in the presence of a metal-ion-containing accelerator and an organic peroxide initiator, complemented by promotor in some cases. According to this process, the cross-linking is carried out in the presence of one of the compounds from the group consisting of alizarin, sodium alizarinesulfonate, 3-nitroalizarin, chinizarine, or purpurin, where the substituents are H atoms or OH, NO.sub.2, SO.sub.3 H, or SO.sub.3 Na groups with the restriction that at least one of them should be other than H, which is present in a ratio of from 0.005 to 0.5, preferably 0.01 to 0.1 percent (mass/mass), compared to the mass of the polyester resin, and cross-linking is trailed by the color change in the system. The invention permits all of the chemical-technological processes involved in the processing of unsaturated polyester resins to be monitored visually.

Procedure for curing unsaturated polyester resins

The invention relates to novel basic ethers of the general formula /I/ and pharmaceutically acceptable acid addition salts and quaternary salts thereof, ##STR1## wherein R.sup.1 and R.sup.2 may be the same or different and represent a C.sub.1-5 alkyl group or a C.sub.3-6 cycloalkyl group or they form, together with the adjacent nitrogen atom, a heterocyclic ring containing 4-7 carbon atoms and optionally a further hetero atom, e.g. an oxygen, sulfur or nitrogen atom, and this latter may be optionally substituted by a C.sub.1-3 alkyl, benzyl or phenyl group,

Basic ethers and pharmaceutical compositions containing the same

The invention relates to a process for the controlled hardening of unsaturated polyester resins at temperatures of -5.degree. C. to +150.degree. C. using an organic peroxide initiator. According to the process of the invention an organic dyestuff of the general formula (I), ##STR1## wherein R.sup.1 stands for a group of the general formula (II), ##STR2## and in this formula R.sup.5 is a C.sub.1-4 alkyl group and n is an integer from 1 to 3,

Process for the controlled hardening of unsaturated polyester resins

New compounds of the general formula (I) ##SPC1## and salts thereof were prepared by reacting a compound of the general formula (II) ##SPC2## with a compound of the general formula (III) or (IV) ##EQU1## and optionally saturating the --C=N-- bond. In the above formulae

Indazole-3-carboxylic acid hydrazides and a process for the preparation

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Budapest, Hungary

Laszlo Magdanyi