Admixtures for cementitous compositions
US6063184A · kind A · utility
37Cited by
8References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 22, 1998 |
| Grant date | May 16, 2000 |
| Priority date | — |
| Expiry date | May 22, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2103/34
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention relates to a random styrene-maleic anhydride (SMA) copolymer in free acid or salt form wherein the copolymer has the following types and numbers of monomer units ##STR1## in which M is selected from hydrogen, a cation and a residue of a hydrophobic polyalkylene glycol or polysiloxane, R is the residue of methylpoly(ethylene)glycol of molecular weight (weight-average) 900-2000, x=0.35-0.75 and y=0.25-0.65. These copolymers are particularly useful as superplasticizers in cementitious compositions such as concretes and mortars.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.