Patent · US Active

Decolorization of polyols

US8519172B2 · kind B2 · utility

0Cited by
4References
9Claims
0Family size

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Key dates

Filing dateNov 15, 2010
Grant dateAug 27, 2013
Priority date—
Expiry dateNov 15, 2030

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC07C67/347
  • WIPO fieldOrganic fine chemistry
  • WIPO sectorChemistry

Abstract

Natural oil-based polyols that are high in color, e.g., >40 APHA, are decolorized when exposed to high frequency visible light and/or low frequency UV light, with or without the combination of heat and/or air exposure.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.