Polyamide, composition comprising such a polyamide, and uses thereof

Patent metadata

Field	Value
Publication number	US-9599512-B2
Application number	US-99968609-A
Country	US
Kind code	B2
Filing date	Jun 19, 2009
Priority date	Jun 20, 2008
Publication date	Mar 21, 2017
Grant date	Mar 21, 2017

Abstract

The invention relates to a polyamide comprising at least one repeat unit corresponding to the general formulation: X·Y in which: X represents a cycloaliphatic diamine and Y represents an aliphatic dicarboxylic acid chosen from dodecanedioic (C 12 ) acid, tetradecanedioic (C 14 ) acid and hexadecanedioic (C 16 ) acid, characterized in that said dicarboxylic acid comprises organic carbon of renewable origin, determined according to Standard ASTM D6866. The invention also relates to a composition comprising this polyamide and also to the use of this polyamide and of such a composition.

First claim

The invention claimed is:

1. A process for the preparation of a polyamide having at least one repeat unit corresponding to the formula:
X·Y

in which:
X represents a cycloaliphatic diamine and
Y represents an aliphatic dicarboxylic acid that is dodecanedioic (C 12 ) acid,
said dicarboxylic acid comprising organic carbon of renewable origin, determined according to Standard ASTM D6866, said process comprising at least one polycondensation of at least one fatty diacid, said diacid comprising carbon of renewable origin determined according to Standard ASTM D6866, with a cycloaliphatic diamine, said process comprising:
a) obtaining a fatty monoacid from vegetable oil, the fatty monoacid being lauric acid extracted from rich oil made up of palm kernel or coconut oil, as renewable starting material, containing mainly impurities with an even number of carbon atoms, and optionally purifying,
b) preparing a diacid Y from the fatty monoacid resulting from a),
c) polycondensing the said diacid Y with the cycloaliphatic diamine X.

2. The process according to claim 1 , wherein the polyamide produced has a content, expressed as percentage, of organic carbon of renewable origin, denoted % C renew.org , of greater than or equal to 20%.

3. The process according to claim 1 , wherein the polyamide produced is a homopolyamide.

4. The process according to claim 1 , wherein monomer X is 3,3′-dimethyl-4,4′-diaminodicyclohexylmethane (BMACM or MACM) or p-bis(aminocyclohexyl)methane (PACM).

5. The process according to claim 1 , wherein the polyamide produced has formula MACM.12, or PACM.12, with 12 meaning dodecanedioic (C 12 ) acid.

6. The process according to claim 1 , wherein the polyamide produced is a copolyamide comprising at least two distinct units of the formula:
X·Y/Z

in which:
Z is a unit obtained from an amino acid, a unit obtained from a lactam or a unit of the formula (Ca diamine)·(Cb diacid), with a representing the number of carbon atoms of the diamine and b representing the number of carbon atoms of the diacid, a and b each being between 4 and 36.

7. The process according to claim 6 , wherein the copolyamide has the formula: B.12/11, B.12/12, P.12/11, P.12/12, B.12/10.12, P.12/10.12, B.12/10.10, or P.12/10.10, B denoting 3,3′-dimethyl-4,4′-diaminodicyclohexylmethane and P denoting p-bis(aminocyclohexyl) methane, 10 meaning decanoic acid (C 10 ), 11 meaning undecanoic acid (C 11 ), and 12 meaning dodecanedioic (C 12 ) acid.

8. The process according to claim 2 , wherein the polyamide produced has a content, expressed as a percentage, of organic carbon of renewable origin, denoted % C renew.org , of greater than or equal to 40%.

9. The process according to claim 8 , wherein the polyamide produced comprises a content, expressed as a percentage, of organic carbon of renewable origin, denoted % C renew.org , of greater than or equal to 50%.

10. The process according to claim 9 , wherein the polyamide produced has a content, expressed as a percentage, of organic carbon of renewable origin, denoted % C renew.org , of greater than or equal to 52%.

Assignees

• Lê Guillaume
• Jouanneau Julien
• Saillard Benjamin
• Arkema France

Inventors

• Lê Guillaume
• Jouanneau Julien
• Saillard Benjamin

Classifications

• G01J3/4338 Primary

  Frequency modulated spectrometry · CPC title

• C08L77/06

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

• G01J3/0297

  Constructional arrangements for removing other types of optical noise or for performing calibration · CPC title

• C08G69/265

  from at least two different diamines or at least two different dicarboxylic acids · CPC title

• C08J5/18

  Manufacture of films or sheets · CPC title