Copolymer as a water-reducing agent in a hydraulic composition and use of copolymers for improving the early mechanical strength of a hydraulic composition
US10501371B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 15, 2017 |
| Grant date | Dec 10, 2019 |
| Priority date | — |
| Expiry date | Dec 27, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2103/302
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Novel copolymers obtained by polymerisation a mixture of monomers comprising: at least one anionic monomer (a) comprising a polymerisable unsaturated function and a carboxylic group; and at least one monomer (b) of formula (I): H2C═C(—R1)—(CH2)p—O-[(EO)n—(PO)m]—H (I) where [(EO)n—(PO)m] represents a polyalkoxylated chain consisting of ethoxylated units EO and propoxylated units PO, distributed into blocks, alternating or statistical, the molar proportion of the ethoxylated units in the polyalkoxylated chain (n)/(m+n) being greater than or equal to 70% and strictly less than 90%. In addition, hydraulic composition, for example concrete compositions, comprising such copolymers, and the use of said copolymers as water-reducing agents in hydraulic compositions and for increasing the early mechanical strength of a hydraulic composition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.