SUPERPLASTICIZER Russian patent published in 1995 - IPC

FIELD: polymeric materials. SUBSTANCE: proposed plasticizer composition is based on the oligomeric condensation products of naphthalene sulfoacid and formaldehyde. Plasticizer has, wt.-% oligomers with 2-4 naphthalene nuclei 5-8; oligomers with 5-9 naphthalene nuclei 12-18; oligomers with 10-12 naphthalene nuclei 6-14; oligomers with 13-14 naphthalene nuclei 12-18; oligomers with 15-17 naphthalene nuclei 40-48, and oligomers with nuclei number above 17 3-7. Strength of concrete containing proposed superplastizicer is up to 72.5 MPa, resistance to cold is up to 350 cycles, shrinkage of deformation is up to 69 x 69·10⁵.. EFFECT: increased strength, resistance to cold, decreased shrinkage deformation of concrete. 1 tbl