摘要:
An agent for preventing deterioration in the slump properties of mortar concrete, containing as a main ingredient a lignin sulfonate having a carboxyl group content of at least 0.2 mols and a sulfon group content of at least 0.1 mols per phenyl propane unit. Disclosed is also a method for improving the workability of mortar concrete, comprising adding said agent to the mortar concrete in an amount of 0.05 to 0.5% in relation to cement and at any suitable point of time before or after mixing.
摘要:
A production method of novel condensates comprising bisphenols and aromatic aminosulfonic acids, in particular, novel 4-aminobenzenesulfonic acid-2, 2-bis(4-hydrocyphenyl)propaneformaldehyde type condensate and said condensate itself are disclosed. Uses of condensates as a dispersant for disperse dye, additive for carbonaceous fine powder-water slurry and water-reducing agent for cement are also claimed.
摘要:
A lignin composition having a content of aluminum or iron or both at 0.05 to 5 wt. % (based on the solids of the lignin solution) and a content of extracts with chlorotrifluoroethylene dimer at 0.01 to 0.4 wt. % (based on solids in lignin solution). The lignin compositions possess high surface tension and are suitable as dispersing agents for cement.
摘要:
Novel condensates comprising bisphenols and aromatic aminosulfonic acids, in particular, novel 4-aminobenzenesulfonic acid-2,2-bis (hydroxyphenyl)propaneformaldehyde condensates, and methods for their production are disclosed. The novel condensates are useful as a dispersant for disperse dyes, an additive for carbonaceous fine powder-water slurries and as a water reducing agent for cement.