US 7,459,492 B2 · Polypropylene composites with reinforcement based on eggshells: procedure to obtain the said composite, reinforcement based on eggshells, and procedure for obtaining it

Abstract

This invention reveals polypropylene composites to be used in the automotive, electronics, packaging and textile industries, which comprises a polypropylene homopolymer in a proportion ranging from 10 to 60% by weight, a natural reinforcement based on eggshells, and an antioxidant. This invention also reveals a natural reinforcement produced from eggshells obtained as an agroindustrial waste, the process to obtain said composite, and the process to obtain such reinforcement. By means of this invention, polypropylene composites using the natural reinforcement are obtained that have improved mechanical and thermal behavior when compared to polypropylene composites using traditional mineral reinforcements.

Claims6

Dependent claims

A polypropylene composite comprising:

a) a polypropylene homopolymer in a proportion between 59.8 and 79.8 weight %;
b) a natural reinforcement from whole eggshells comprising its organic membrane in a proportion between 10 to 20 weight %;
c) a mineral reinforcement comprising talc or calcium carbonate of mineral origin in a proportion between 10 to 20 weight %;
and
d) an antioxidant in a range from 0.2-0.3 weight %.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

11/239,539Filed 28 Sep 2005

Priority

CL 2542-200430 Sep 2004

Published

US 2006/0068185 A130 Mar 2006

Granted

2 Dec 2008

Term ends

Not estimatedThe source records don’t support an estimate.

Classification5 codes

C08K 5/005
Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59: stabilisers against oxidation, heat, light, ozone
C08K 11/005
Use of ingredients of unknown constitution, e.g. undefined reaction products: waste materials, e.g. treated or untreated sewage sludge
Y10T 428/249924
Web or sheet containing structurally defined element or component: noninterengaged fiber-containing paper-free web or sheet which is not of…
C08K
Use of inorganic or non-macromolecular organic substances as compounding ingredients

Polypropylene composites with reinforcement based on eggshells: procedure to obtain the said composite, reinforcement based on eggshells, and procedure for obtaining it

Life of this patent

Polypropylene composites with reinforcement based on eggshells: procedure to obtain the said composite, reinforcement based on eggshells, and procedure for obtaining it

Life of this patent

Abstract

Claims6