Coatings for pelletized thermoplastic pavement marking compositions
US10308816B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Feb 23, 2017 |
| Grant date | Jun 4, 2019 |
| Priority date | — |
| Expiry date | Feb 23, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K3/36
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A coating for pelletized thermoplastic road marking material is provided in which at least one of waxes, silica compounds, and inorganic compounds is provided on the surface of the thermoplastic pellet. The pellet is formed by mixing a binder mixture with a filler mixture, heating the mixed ingredients while mixing into a homogenous molten mixture and then extruding the molten mixture. The extruded material is cooled, cut into individual pellets and then coated. The coating prevents clumping of the pellets and also imparts improved flowability and lower melting point properties. Preferred coatings include micronized polyethylene wax, silicates, silanes, silicones, siliconates, fluoropoymers, calcium carbonate and zeolite.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.