US 2012/0238769 A1Published application

Decolorization of Polyols

AssigneeDow Global Technologies LLC

InventorsDavid A. Babb, Matthias Schaefer

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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.

Claims10

Dependent claims

A process for decolorizing a natural oil-based polyol, the process comprising the step of exposing the polyol to actinic radiation of a wavelength of 250 to 550 nanometers.

Dependencies are inferred from the claim text.

Facts

Application: 13/513,078Filed 15 Nov 2010
Priority: 3 Dec 2009
Published: 20 Sep 2012
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

C08G 63/912
Polymers modified by chemical after-treatment: derived from hydroxycarboxylic acids
C07C 67/03
Preparation of carboxylic acid esters: by reacting an ester group with a hydroxy group
C07C 67/347
By increase in the number of carbon atoms: by addition to unsaturated carbon-to-carbon bonds
C08G
Macromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds

Family

Application61/266,244Us provisional application · filed 3 Dec 2009
US 8,519,172 B2Related patent
US 2012/0238769 A1This patent

From the US filing history. Foreign family members aren’t listed.

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