Free-flowing polymer composition
US11345774B2 · kind B2 · utility
0Cited by
6References
20Claims
0Family size
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Key dates
| Filing date | Aug 30, 2019 |
| Grant date | May 31, 2022 |
| Priority date | — |
| Expiry date | Aug 30, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K2201/006
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A block copolymer composition is disclosed. The composition contains an elastomeric block copolymer and a hydrophilic fumed silica with a surface area (BET, measured by nitrogen gas adsorption) of at least 200 m2/g, and a pH of 3 to 5, a tamped density of <=75 g/L. The block copolymer composition forms free-flowing composition, requiring less than 400 lbs/ft2 to break in a blocking test. The free-flowing composition does not negatively impact haze, transparency, and yellowness of transparent compounds, suitable for use in transparent formulations for medical, toys, and overmolds, viscosified oils, and oil gels applications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.