Semi-crystalline polyamide composition with high glass transition temperature for thermoplastic material, process for manufacturing same and uses thereof

Patent metadata

Field	Value
Publication number	US-10633490-B2
Application number	US-201715758968-A
Country	US
Kind code	B2
Filing date	Jul 10, 2017
Priority date	Jul 11, 2016
Publication date	Apr 28, 2020
Grant date	Apr 28, 2020

Abstract

The invention relates to a composition for thermoplastic material comprising:
0 to 70% by weight, preferentially 20% to 60% by weight, of short reinforcing fibers, 30% to 100% by weight, preferentially 40% to 80% by weight, of a thermoplastic matrix based on at least one semi-crystalline polyamide polymer, 0 to 50% of additives and/or other polymers, said semi-crystalline polyamide polymer being: a) a reactive composition comprising or consisting of at least one reactive polyamide prepolymer which is a precursor of said semi-crystalline polyamide polymer, or, as an alternative to a), b) a nonreactive composition of at least one polyamide polymer, said composition being that of said thermoplastic matrix defined above, and said reactive polyamide prepolymer of the composition a) and said polyamide polymer of the composition b) comprising or consisting of at least one BACT/XT copolyamide.

First claim

The invention claimed is:

1. A thermoplastic material composition, comprising:
0 to 70% by weight of short reinforcing fibers,
30% to 100% by weight of a thermoplastic matrix comprising at least one semi-crystalline polyamide polymer,
0 to 50% of additives and/or other polymers,
said thermoplastic matrix comprising at least one semi-crystalline BACT/XT copolyamide in which:
BACT is a unit comprising an amide unit present at a molar content ranging from 20% to 70%, wherein BAC is chosen from 1,3-bis(aminomethyl)cyclohexyl (1,3-BAC), 1,4-bis(aminomethyl)cyclohexyl (1,4-BAC) and a mixture thereof, and wherein T is terephthalic acid,
XT is a unit comprising an amide unit present at a molar content ranging from 30% to 80%, wherein X is a C9 to C18 linear aliphatic diamine, and wherein T is terephthalic acid,
in the BACT and/or XT units, independently of one another, up to 20 mol %, relative to the total amount of dicarboxylic acids, of the terephthalic acid can be replaced with other aromatic, aliphatic or cycloaliphatic dicarboxylic acids comprising 6 to 36 carbon atoms, and
in the BACT and/or XT units, independently of one another, up to 30 mol % of the BAC and/or where appropriate of X, relative to the total amount of diamines, can be replaced with other diamines comprising from 4 to 36 carbon atoms and
in the copolyamide, no more than 30 mol %, relative to the total amount of monomers, can be formed by lactams or aminocarboxylic acids,
and on condition that the sum of the monomers which replace the terephthalic acid, the BAC and X does not exceed a concentration of 30 mol % relative to the total amount of monomers used in the copolyamide.

2. The composition as claimed in claim 1 , wherein said semi-crystalline polyamide polymer has a melting point Mp<290° C., as determined according to the standard ISO 11357-3 (2013).

3. The composition as claimed in claim 1 , wherein said semi-crystalline polyamide polymer has a glass transition temperature Tg>120° C., as determined according to the standard ISO 11357-2 (2013).

4. The composition as claimed in claim 1 , wherein said semi-crystalline polyamide polymer exhibits a difference between the melting point and the crystallization temperature Mp-Tc<40° C. as determined according to the standard ISO 11357-3:2013.

5. The composition as claimed in claim 1 , wherein the heat of crystallization of the semi-crystalline polyamide polymer, measured by differential scanning calorimetry (DSC) according to the standard ISO 11357-3:2013, is greater than 40 J/g.

6. The composition as claimed in claim 1 , wherein the BAC is 1,3-BAC.

7. The composition as claimed in claim 1 , wherein the BAC is 1,3-BAC, and XT is selected from the group consisting of 9T, 10T, 11T and 12T.

8. The composition as claimed in claim 1 , wherein the XT is 10T, wherein 10 corresponds to 1,10-decanediamine.

9. The composition as claimed in claim 1 , wherein the sum of the monomers which replace the terephthalic acid, the BAC and X is equal to zero.

10. The composition as claimed in claim 1 , further comprising at least one additive.

11. The composition as claimed in claim 10 , wherein the additive is selected from the group consisting of an antioxidant, a heat stabilizer, a UV absorber, a light stabilizer, an impact modifier, a lubricant, an inorganic filler, a flame retardant agent, a nucleating agent and a dye.

12. The composition as claimed in claim 1 , wherein it is a molding composition.

13. The composition as claimed in claim 1 , which contains the short reinforcing fibers.

14. A method of preparing the composition as claimed in claim 1 , comprising combining the short reinforcing fibers if present, thermoplastic matrix, and additives and/or other polymers if present.

15. A method of preparing mechanical or structural parts, comprising producing a mechanical or structural part from the composition as claimed in claim 1 .

16. The method of claim 15 , comprising molding the composition.

17. A mechanical or structural part comprising the composition as claimed in claim 1 .

18. The mechanical or structural part as claimed in claim 17 , wherein said part is used in a field selected from the group consisting of the motor vehicle field, electrical and electronic fields, railway field, marine and wind power fields, photovoltaic field, solar energy field, sport field, aeronautical and aerospace fields, road transport field, construction field, civil engineering field, panel field and leisure field.

19. The mechanical or structural part as claimed in claim 17 , which is a part under an engine hood for the transportation of fluid, a cooling device, or a device for the transportation or transfer of fuels or fluids.

20. The mechanical or structural part as claimed in claim 17 , which is an electrical or electronic good.

21. The mechanical or structural part as claimed in claim 17 , which comprises a monolayer or multilayer tube or a film.

22. A composition suitable for a thermoplastic material, comprising:
0 to 70% by weight of short reinforcing fibers,
30% to 100% by weight of a thermoplastic matrix, and
0 to 50% of additives and/or other polymers,

wherein
the thermoplastic matrix comprises at least one reactive polyamide prepolymer which
produces a semi-crystalline polyamide polymer when subjected to polymerization, the reactive polyamide prepolymer comprises at least one BACT/XT copolyamide, BACT is a unit comprising an amide unit present at a molar content ranging from 20% to

70%,
wherein BAC is chosen from 1,3-bis(aminomethyl)cyclohexyl (1,3-BAC), 1,4-bis(aminomethyl)cyclohexyl (1,4-BAC) and mixtures thereof, and
T is terephthalic acid,
XT is a unit comprising an amide unit present at a molar content ranging from 30% to 80%,
wherein X is a C9 to C18 linear aliphatic diamine, and
T is terephthalic acid,
in the BACT and/or XT units, independently of one another, up to 20 mol %, relative to the total amount of dicarboxylic acids, of the terephthalic acid can be replaced with other aromatic, aliphatic or cycloaliphatic dicarboxylic acids comprising 6 to 36 carbon atoms, and
in the BACT and/or XT units, independently of one another, up to 30 mol % of the BAC and/or where appropriate of X, relative to the total amount of diamines, can be replaced with other diamines comprising from 4 to 36 carbon atoms,
in the BACT/XT copolyamide, no more than 30 mol %, relative to the total amount of monomers, can be formed by lactams or aminocarboxylic acids,
the sum of the monomers which replace the terephthalic acid, the BAC and X does not exceed a concentration of 30 mol % relative to the total amount of monomers used in the BACT/XT copolyamide.

23. The composition as claimed in claim 22 , wherein said semi-crystalline polyamide polymer has a melting point Mp<290° C., as determined according to the standard ISO 11357-3 (2013).

24. The composition as claimed in claim 22 , wherein said semi-crystalline polyamide polymer has a glass transition temperature Tg>120° C., as determined according to the standard ISO 11357-2 (2013).

25. The composition as claimed in claim 22 , wherein said semi-crystalline polyamide polymer exhibits a difference between the melting point and the crystallization temperature Mp−Tc<40° C., as determined according to the standard ISO 11357-3:2013.

26. The composition as claimed in claim 22 , wherein the heat of crystallization of said semi-crystalline po

Assignees

• Arkema France

Inventors

• Capelot Mathieu
• Hochstetter Gilles

Classifications

• C08G69/265 Primary

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

• C08L77/06 Primary

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

• C08K7/02

  Fibres or whiskers · CPC title

• C08G69/36

  derived from amino acids, polyamines and polycarboxylic acids · CPC title

• B29K2077/00

  Use of {PA, i.e.} polyamides, e.g. polyesteramides {or derivatives thereof}, as moulding material · CPC title