MANUFACTURE OF CEMENT DISPERSANT

PURPOSE:To obtain a cement dispersant consisting mainly of a cndensate, by the condensation, under inert gas-pressurized state between naphthalenesulfonic acid and formaldehyde to reduce reaction time and markedly decrease the amount of the catalyst, i.e. sulfuric acid to effect easier after-treatme...

Full description

Saved in:
Bibliographic Details
Main Authors OOTAKI YASUHIKO, UNO KAZUO, IMAI KIYOTO
Format Patent
LanguageEnglish
Published 08.06.1983
Subjects
ARTIFICIAL STONE
CEMENTS
CERAMICS
CHEMISTRY
COMPOSITIONS BASED THEREON
COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS
CONCRETE
LIME, MAGNESIA
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
REFRACTORIES
SLAG
THEIR PREPARATION OR CHEMICAL WORKING-UP
TREATMENT OF NATURAL STONE
Online AccessGet full text

Cover

More Information
Summary:PURPOSE:To obtain a cement dispersant consisting mainly of a cndensate, by the condensation, under inert gas-pressurized state between naphthalenesulfonic acid and formaldehyde to reduce reaction time and markedly decrease the amount of the catalyst, i.e. sulfuric acid to effect easier after-treatment. CONSTITUTION:To naphthalenesulfonic acid, ca. 0.01-0.5 (pref. 0.04-0.4)mol, per mol of the above acid, of sulfuric acid as a catalyst is added and then water of ca. 0.15-0.5 time for the weight of the naphthalene sulfonic acid is added followed by incorporating ea. 0.8-1.2 (pref. 0.9-1.1)mol, in terms of formaldehyde, of ca. 37% formalin to carry out a reaction under a pressure >=0.2 (pref. 0.5- 10)kg/cm G of an inert gas (e.g., nitrogen) at[a. 100-140 (pref. 110-130) deg.C for 2-16 (pref. 3-10)hr, thus obtaining a condensate and its salt C the objective cement dispersant). USE:For the application to concrete, mortor, cement paste, etc.
Bibliography:Application Number: JP19810194569