Additive compositions and thermoplastic compositions comprising the same
US10800902B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 12, 2017 |
| Grant date | Oct 13, 2020 |
| Priority date | — |
| Expiry date | Apr 12, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/0083
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method for producing a thermoplastic polymer composition comprises the steps of separately providing a thermoplastic polymer and an additive composition and then mixing the thermoplastic polymer and additive composition. The additive composition comprises a clarifying agent and a coloring agent. Another method for producing a thermoplastic polymer composition comprises the steps of separately providing a thermoplastic polymer, a clarifying agent, and a coloring agent and then mixing the thermoplastic polymer, the clarifying agent, and the coloring agent. The coloring agent is present in the composition in an amount to yield a composition exhibiting CIE L*, a*, and b* values falling within a defined color space. An additive composition contains a clarifying agent and a coloring agent. The coloring agent is present in the composition in such an amount that when the additive composition is added to a thermoplastic polymer composition, the thermoplastic polymer composition exhibits CIE L*, a*, and b* values falling within a defined color space.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.