Peba for direct adhesion to tpe

Patent metadata

Field	Value
Publication number	US-2016376483-A1
Application number	US-201615192276-A
Country	US
Kind code	A1
Filing date	Jun 24, 2016
Priority date	Jun 26, 2015
Publication date	Dec 29, 2016
Grant date	—

Abstract

The invention relates to a copolymer having polyamide PA blocks and polyether PE blocks, in which PA is of diamine.diacid X.Y type; X, the number of carbons of the diamine, is within the range from 6 to 14, and Y, the number of carbons of the diacid, is within the range from 6 to 18. The invention also relates to the use of the said copolymer in a process of direct adhesion between two TPE materials for increasing the peel strength between these materials.

First claim

1 . Copolymer having polyamide PA blocks and polyether PE blocks, in which PA is of X.Y type; X, the number of carbons of the diamine, is within the range from 6 to 14, and Y, the number of carbons of the diacid, is within the range from 6 to 18.

2 . Copolymer according to claim 1 , in which X is chosen from 6 or 10 and Y is chosen from 10 or 12.

3 . Copolymer according to either claim 1 , in which PE is chosen from PTMG, PPG, PO3G and/or PEG.

4 . Copolymer according to claim 1 , in which the said copolymer comprises from 51 to 90% by weight of polyamide blocks and respectively from 49 to 10% by weight of polyether blocks, with respect to the total weight of copolymer.

5 . Copolymer according to claim 1 , in which the number-average molecular weight (Mn) of the PA blocks is within the range from 500 to 10 000.

6 . Copolymer according to claim 1 , in which the number-average molecular weight (Mn) of the PE blocks is within the range from 400 to 1000.

7 . A process of direct adhesion between two TPE materials for increasing the peel strength between these materials, the method comprising adhering the two TPE materials with a PEBA, wherein the PEBA is a copolymer according to claim 1 .

8 . Composition based on copolymer according to claim 1 , wherein the composition comprises:
from 51 to 99.9% by weight of the said copolymer, from 0.1 to 49% by weight of at least one other component chosen from: PEBAs with a different composition and/or with a different flexural modulus from that of the copolymer, PAs, POFs, COPEs, TPUs, reinforcing fillers and/or fibres, in particular of glass or of carbon, colourants, UV absorbers, antioxidants, in particular phenolic antioxidants or antioxidants based on phosphorus or based on sulphur, light stabilizers of hindered amine or HALS type, and mixtures thereof.

9 . Process for direct adhesion of a copolymer material C1 according to claim 1 with a copolymer material C2, C2 being of identical composition to and having the same flexural modulus as C1, or being of identical composition to but having a different flexural modulus from C1, or a TPE material chosen from PEBAs of different compositions from that of the said copolymer C1, COPEs and/or TPUs, wherein the assembling is carried out by a process comprising the heating of at least one of the two copolymer materials C1 and/or C2, so as to cause one material to adhere to the other.

10 . Process according to claim 9 , in which the material C1 is melted or softened under heating and the molten material C1 is brought into contact with at least a portion of the material C2 of the series of the thermoplastic polyurethanes TPUs in order to cause the two materials to adhere.

11 . Process according to claim 9 , in which the material C2 of the series of the thermoplastic polyurethanes TPUs is melted or softened under heating and the molten material C2 is brought into contact with at least a portion of the material C1 in order to cause the two materials to adhere.

12 . Process according to claim 9 , in which the material C1 and the material C2 of the series of the TPUs are independently melted or softened under heating and the molten material C1 is brought into contact with at least a portion of the molten material C2 in order to cause the two materials to adhere.

13 . Process according to claim 9 , in which the material C1 and the material C2 are assembled by a direct adhesion process chosen from: overmoulding, hot pressing, coextrusion, thermoforming, injection moulding, extrusion moulding, and blow moulding.

14 . Process according to claim 9 , in which the assembling temperature is within the range from 220 to 300° C.

15 . Composite article comprising at least two polymer materials which adhere directly to one another, one made of copolymer in accordance with claim 1 and the other made of TPE chosen from identical PEBA with a flexural modulus different from that of the copolymer, PEBA of composition different from that of the said copolymer, COPE and/or TPU.

16 . A composite article according to claim 15 , wherein the composite article is configured for use in the manufacture of sports equipment, as a component of footwear, as a medical device, as a transmission belt, as an antistatic additive, as waterproof-breathable film, as support for active molecules, as colouring agent, as welding agent, as decorative element and/or as additive for polyamide.

Assignees

• Arkema France

Inventors

• Eustache René-Paul
• Sabard Mathieu
• Deyrail Yves
• Pineau Quentin
• Turan-Altuntas Inci
• Pouzet Martin
• Yoshitake Atsushi

Classifications

• C08G69/40 Primary

  Polyamides containing oxygen in the form of ether groups (C08G69/12, C08G69/32 take precedence) · CPC title

• C09J187/005 Primary

  Block or graft polymers not provided for in groups C09J101/00 - C09J185/04 · CPC title

• C08G2170/20

  Compositions for hot melt adhesives · CPC title

• C08L77/06

  Polyamides derived from polyamines and polycarboxylic acids (C08L77/10 takes precedence) · CPC title

• B32B27/34

  comprising polyamides · CPC title