Polymeric materials
US10053545B2 · kind B2 · utility
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10References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 19, 2011 |
| Grant date | Aug 21, 2018 |
| Priority date | — |
| Expiry date | Dec 19, 2031 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2367/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method of introducing an additive into a polymeric material comprises using a liquid formulation comprising an additive, for example a colorant, and a vehicle comprising an aliphatic or aromatic tri- or di-carboxylic acid covalently linked by ester bonds to two or more chains. The method involves contacting the liquid formulation with the polymeric material in a melt processing apparatus. The cavity transfer mixer may be used in the process. A fiber is suitably subsequently produced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.