Laser markable coating
US6261348A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 25, 1999 |
| Grant date | Jul 17, 2001 |
| Priority date | — |
| Expiry date | Jun 25, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D5/26
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention provides a transparent or colorless coating comprising a heat responsive material that increases in opacity when exposed to heat. An example of a heat responsive material is a silicate or a titanate. The present invention further provides a coating composition comprising a carrier and a heat responsive material. The coating can further include additives such as adhesion promoters, surface tension modifying agents, crosslinking agents, or plasticizers. The present invention further provides a method for creating a mark on a substrate comprising providing to the substrate the transparent coating to obtain a coated substrate and exposing a selected area of the coated substrate to heat, e.g., a laser, to create the mark. The present invention further provides substrates suitable for laser marking.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.