Polyhydroxy polyphenyl compounds as additives for cementitious materials
US4440577A · kind A · utility
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2References
34Claims
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Key dates
| Filing date | Sep 7, 1982 |
| Grant date | Apr 3, 1984 |
| Priority date | — |
| Expiry date | Sep 7, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B24/22
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A superplasticizer with improved water reducing properties for cement, cement slurries, mortar, grout and concrete is Penacolite Resin RM-441 as is or sulfonated, sulfomethylated, sulfonated and condensed with formaldehyde, sulfomethylated and condensed with formaldehyde, condensed with formaldehyde, co-condensed with ligninsulfonates and formaldehyde or co-condensed with naphthalenesulfonic acid formaldehyde condensate and formaldehyde. These materials can be used alone or in combination with salts of aromatic sulfonic acid formaldehyde condensates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.