Title of Invention

A SOLUTION SPINNING METHOD OF PRODUCING HIGH STRENGTH ELONGATED PRODUCTS CONTAINING NANOTUBES

Abstract The present invention relates to a method of producing a high strength and high modulus elongated product comprising the steps of (a) making a composition comprising a semi-crystalline polymer and carbon nanotubes, (b) extruding said composition into an elongated product, and (c) stretching the product below the melting point of the polymer, wherein in step (a) the composition is a colloidal dispersion of nanotubes in a solution of the polymer. The advantages of the invention include production of elongated products, like fibres with higher tensile properties, especially strength, with a lower concentration of nanotubes than with a known method. The invention also concerns a high strength elongated product containing nanotubes obtainable by the method according to the invention, especially a polyolefin fibre containing nanotubes having a tensile strength of higher than 3.0 GPa. The invention also relates to a process for making composite articles wherein high strength elongated products, preferably fibres, according to the invention are used and to anti-ballistic composites comprising said products.
Full Text

Documents:

1787-chenp-2004 abstract.pdf

1787-chenp-2004 claims.pdf

1787-chenp-2004 correspondence others-26-06-2009.pdf

1787-chenp-2004 correspondence others.pdf

1787-chenp-2004 description(complete).pdf

1787-chenp-2004 form-3.pdf

1787-chenp-2004 others.pdf

1787-chenp-2004 pct search report.pdf

1787-chenp-2004 petition.pdf


Patent Number 239982
Indian Patent Application Number 1787/CHENP/2004
PG Journal Number 17/2010
Publication Date 23-Apr-2010
Grant Date 19-Apr-2010
Date of Filing 10-Aug-2004
Name of Patentee DSM IP ASSETS B.V.
Applicant Address HET OVERLOON 1, 6411 TE HEERLEN, THE NETHERLANDS.
Inventors:
# Inventor's Name Inventor's Address
1 ES, VAN, MARTIN, ANTONIUS HAANSBERG 88, NL-6443 ED BRUNSSUM, THE NETHERLANDS.
2 MARISSEN, ROELOF KONINGSTRAAT 55, NL-6121 HS BORN, THE NETHERLANDS.
PCT International Classification Number D01F1/10
PCT International Application Number PCT/NL03/00083
PCT International Filing date 2003-02-07
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 02076314.0 2002-04-05 EUROPEAN UNION
2 02075624.3 2002-02-15 EUROPEAN UNION