Coating bituminous substrates
US6528581B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 16, 1999 |
| Grant date | Mar 4, 2003 |
| Priority date | — |
| Expiry date | Apr 16, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D133/064
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The quality of a mastic coating system for bituminous substrates is improved through the use of a topcoat composition and/or tiecoat composition comprising a water-insoluble latex polymer. The latex polymer has a Tg of from −25° C. to 20° C. and is prepared from a monomer mixture comprising:(a) at least 20% by weight of at least one hydrophobic monomer selected from the group consisting of (C8 to C24) alkyl (meth)acrylates;(b) 0 or up to 45% by weight of at least one vinyl aromatic monomer; wherein the weight of (a) and (b) together constitute at least 25% by weight of said monomer mix(c) 0 or up to 75% by weight of at least one monomer selected from the group consisting (C1 to C4) alkyl (meth)acrylates; and(d) 0 or up to 5% by weight of at least one monomer selected from acrylic or methacrylic acid;wherein when (b) is not present in the monomer mix the amount of (d) is in the range from 0 or up to less than 3% by weight. The mastic coating system has increased adhesion and blistering resistance when the coating is exposed to ponded water and may have reduced bleedthrough of chemicals from the bituminous substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.