Carbon black with large primary particle size as reheat additive for polyester and polypropylene resins
US8097671B2 · kind B2 · utility
0Cited by
11References
14Claims
0Family size
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Key dates
| Filing date | Sep 10, 2010 |
| Grant date | Jan 17, 2012 |
| Priority date | — |
| Expiry date | Sep 10, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31786
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Reheat characteristics of polyethylene and polypropylene resins, including reheating time and resin color, are improved by adding to the resin carbon black with a primary particle size in the range of 200 to 500 nm as an infrared absorber. Thermal carbon blacks having this primary particle size are preferred over Furnace carbon blacks. Injection stretch-blow molded bottles and other thermoformed products are made from resins with carbon black infrared absorber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.