Compositions and process for the oilproofing and waterproofing treatment of construction materials
US4478975A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 19, 1984 |
| Grant date | Oct 23, 1984 |
| Priority date | — |
| Expiry date | Jan 19, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K3/18
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention concerns the oilproofing and waterproofing treatment of construction materials by applying to them a composition which comprises by weight: PA0 (A) from 0.1 to 25% of a fluorinated copolymer formed from PA0 (1) 5 to 70% of a fluorinated ester of the formula: ##STR1## in which Rf represents a perfluoro-alkyl radical, Q represents an oxygen or sulfur atom, W represent a bivalent linkage, one of the symbols R represents a hydrogen atom and the other a hydrogen atom or an alkyl radical, PA0 (2) 4 to 50% of a monomer of the formula: ##STR2## in which R' represent a hydrogen atom or an alkyl radical and R' represents an alkylene radical and PA0 (3) 0 to 91% of any other monomers' PA0 (B) from 2 to 25% of a polyisocyanate or isocyanate prepolymer; PA0 (C) from 0.1 to 10% of a catalyst; and PA0 (D) one or more diluting solvents to make up to 100%. This composition, which confers waters repellency, oil repellency, anti-graffiti and anti-billposting properties, stable towards ageing and weathering on the materials treated, may also be used as a mold-removing agent for pieces of concrete cast in a concrete mold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.