US 8,802,814 B2 · Fine powder of biosourced aliphatic polyester and production method thereof

Abstract

The invention relates to a method for the production of biosourced aliphatic polyester powder having a volume median diameter of less than 30 μm, comprising: a step consisting in supplying an aliphatic polyester having an inherent viscosity of less than 0.5 dl/g; and a step consisting in grinding the polyester, so as to obtain a polyester powder having a volume median diameter of less than 30 μm. The invention also relates to a powder in which the particles have a volume median diameter of less than 30 μm and are impregnated with a compound selected from among polyols and/or carboxylic acids. The invention further relates to the use of the powder for the production of cosmetic, pharmaceutical and perfume products.

Claims15

Dependent claims

A process for manufacturing a biosourced aliphatic polyester powder with a volume-median diameter of less than 30 μm according to standard ISO 13319, comprising:

a—a step of providing an aliphatic polyester with an inherent viscosity of less than 0.5 dl/g measured at a polyester concentration of 0.5% by weight dissolved in meta-cresol relative to the total weight of the solution, at 20° C. using an Ubbelohde viscometer;
b—a step of milling said polyester so as to obtain a polyester powder with a volume-median diameter of less than 30 μm.

Dependencies are inferred from the claim text.

Facts

Application

13/980,073Filed 20 Jan 2012

Priority

FR 11 5043820 Jan 2011

Published

US 2013/0337025 A119 Dec 2013

Granted

12 Aug 2014

Term ends

Not estimatedThe source records don’t support an estimate.

Classification7 codes

C08J 3/12
Processes of treating or compounding macromolecular substances: powdering or granulating
C08G 63/88
Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule: post-polymerisation treatment
C08G 63/91
Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule: polymers modified by…
C08J 2367/02
Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers:…

Fine powder of biosourced aliphatic polyester and production method thereof

Life of this patent

Fine powder of biosourced aliphatic polyester and production method thereof

Life of this patent

Abstract

Claims15