Thermoplastic composition made of polypropylene and polyamide-grafted polyolefin

Patent metadata

Field	Value
Publication number	US-10280295-B2
Application number	US-201415109460-A
Country	US
Kind code	B2
Filing date	Dec 15, 2014
Priority date	Jan 3, 2014
Publication date	May 7, 2019
Grant date	May 7, 2019

Abstract

A composition of a blend of polypropylene, which may be present at between 10% and 90% by weight of the blend, and a polymer having a polyolefin core and polyamide grafts, optionally with an EPDM and/or a functional additive, which may be present at between 10% and 90% by weight of the blend. Also, a multilayer structure including a plurality of adjacent layers, at least one of which is the aforementioned composition.

First claim

The invention claimed is:

1. A thermoplastic composition consisting of a blend of polymers, consisting of:
a first polymer consisting of polypropylene, present at between 10% and 90% by weight of the blend,
a second polymer consisting of a polyolefin backbone containing a residue of at least one unsaturated monomer (X) and a plurality of polyamide grafts; the polyamide grafts are attached to the polyolefin backbone by the residue of the unsaturated monomer (X) comprising a functional group capable of reacting by a condensation reaction with a polyamide having at least one amine end and/or at least one carboxylic acid end and the residue of the unsaturated monomer (X) is attached to the backbone by grafting or copolymerization; this second polymer being present at between 10% and 90% by weight of the blend; and
a third polymer consisting of a functionalized polyolefin, at between 0.1% and 20% of the blend; and
optionally a functional adjuvant, at between 0% and 30% by weight of the composition; and
in that the composition exhibits a Young's modulus at 23° C. of greater than or equal to 400 MPa.

2. The composition as claimed in claim 1 , wherein in the second polymer, the unsaturated monomer (X) is maleic anhydride.

3. The composition as claimed in claim 1 , wherein the said second polymer is nanostructured.

4. The composition as claimed in claim 1 , wherein regarding the second polymer, the number-average molar mass of the above said polyamide grafts of the above said grafted polymer is within the range extending from 1000 to 10 000 g/mol.

5. The composition as claimed in claim 1 , wherein regarding the second polymer, the polyamide grafts comprise at least one copolyamide, and/or one monofunctional NH 2 polyamide 6 and/or one monofunctional NH 2 polyamide 11.

6. The composition as claimed in claim 1 , wherein the first polymer is chosen from a polypropylene homopolymer or a heterogeneous or random polypropylene copolymer.

7. The composition as claimed in claim 1 , wherein the first polymer is present at between 15% and 40% by weight of the composition while the second polymer is present at between 60% and 85% by weight of the composition.

8. The composition as claimed in claim 1 , wherein the first polymer is present at between 60% and 90% by weight of the composition while the second polymer is present at between 10% and 40% by weight of the composition.

9. The composition as claimed in claim 1 , wherein the functional adjuvant consists of one or more plasticizers, adhesion promoters, UV stabilizers and/or UV absorbers, antioxidants, flame retardants, dyes/brighteners, pigments and reinforcing fillers.

10. A multilayer structure comprising a plurality of adjacent layers, wherein at least one of these layers consists of the composition as defined in claim 1 .

Assignees

• Arkema France

Inventors

• Jousset Dominique
• Aussedat Grégoire
• Bizet Stéphane

Classifications

• C08F255/00

  Macromolecular compounds obtained by polymerising monomers on to polymers of hydrocarbons as defined in group C08F10/00 · CPC title

• C08L2666/78

  Stabilisers against oxidation, heat, light or ozone · CPC title

• C08L2666/68

  Plasticizers; Solvents · CPC title

• C08L2666/70

  Organic dyes or pigments; Optical brightening agents · CPC title

• C08L2203/206

  use in coating or encapsulating of electronic parts · CPC title