Thermoplastic material comprising polychromic substances
US8211620B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 14, 2011 |
| Grant date | Jul 3, 2012 |
| Priority date | — |
| Expiry date | Jan 19, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/146
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The present invention relates to thermoplastic material comprising polymer and at least one polychromic substance, wherein the polychromic substance is a functionalised diacetylene having the formula which has the general structure:X—C≡C—C≡C—Y—(CO)n-QZwherein X is H or alkyl, Y is a divalent alkylene group, Q is O, S or NR, R is H or alkyl, and Z is alkyl, and n is 0 or 1.The present invention further relates to a method of processing thermoplastic material to form a plastic article, wherein the method comprises the step of processing the thermoplastic material at a temperature greater than the melt temperature of the thermoplastic, wherein the thermoplastic material comprises polymer and at least one polychromic substance as defined above; and further comprising the step of irradiating the plastic article to color at least a region of the plastic article.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.