Process for preparing a polyamideimide, a polyamideimide and composition comprising this polyamideimide

A technology of polyamide-imide and compound is applied in the field of preparation of semi-aromatic polyamide-imide, which can solve the problems of toxicity, danger to human body and environment, etc.

Inactive Publication Date: 2011-06-15
RHODIA OPERATIONS SAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

On the other hand, some solvents are toxic an

Method used

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  • Process for preparing a polyamideimide, a polyamideimide and composition comprising this polyamideimide
  • Process for preparing a polyamideimide, a polyamideimide and composition comprising this polyamideimide
  • Process for preparing a polyamideimide, a polyamideimide and composition comprising this polyamideimide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0119] Example 1: Preparation of polyamideimide PAI 66 / 6TMA 90 / 10

[0120] Add 132.37g (0.505mol) N salt (1:1 salt of hexamethylenediamine and adipic acid), 11.78g trimellitic acid (TMLA) (0.056mol) in the polymerization reactor, with 32.6% by weight A solution of 19.99 g (0.056 mol) of hexamethylenediamine (HMD) dissolved in water and 123.65 g of deionized water and 2 g of antifoam.

[0121] Polyamideimides were prepared according to standard polymerization methods for polyamide 66 type.

[0122] The polymer obtained is cast into rods, cooled and pelletized by cutting the rods.

[0123] The obtained polymer has the following characteristics:

[0124] Mn=9 700g / mol

[0125] Tg = 63°C, Tc = 204.2°C, Tf = 247.2°C.

[0126] 1 H NMR analysis indicated complete cyclization to the imide.

Embodiment 2 to 7

[0128] As in Example 1, molar compositions 80 / 20 (Example 2), 67 / 33 (Example 3), 60 / 40 ( Example 4), 50 / 50 (Example 5), 30 / 70 (Example 6), 15 / 85 (Example 7) PAI 66 / 6TMA type polyamideimide.

[0129] The compositions (all compositions contained 2 g of antifoam) and characterization of these polymers are reported in Table 1 below.

[0130] Table 1

[0131]

[0132] 1H NMR analysis indicated complete cyclization to the imide in Examples 2-7.

Embodiment 8

[0133] Example 8: Preparation of polyamideimide by trimellitic anhydride

[0134] In this example, trimellitic anhydride was used instead of trimellitic acid.

[0135] 115.37 g of N-salt, 21.80 g of 97% trimellitic anhydride, 39.19 g of a 32.6% by weight solution of hexamethylenediamine dissolved in water, 9.39 g of deionized water, and 2 g of an antifoam were added to the polymerization reactor.

[0136] As in Example 1, the polyamideimide was prepared according to the standard polymerization method for polyamide 66 type.

[0137] The polymer obtained is cast into rods, cooled and pelletized by cutting the rods.

[0138] The obtained polymer has the following characteristics:

[0139] Mn=9 800g / mol

[0140] Tc = 186.6°C, Tf = 234.5°C.

[0141] 1 H NMR analysis indicated complete ring formation of the imide.

[0142] The analysis did not reveal significant differences between polymers synthesized with trimellitic anhydride or with trimellitic acid.

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Abstract

The present invention relates to a process for preparing a semi-aromatic polyamideimide, and also to a polyamideimide and to a composition based on a thermoplastic matrix, comprising a polyamideimide. The invention relates more particularly to a process for preparing a polyamideimide by melt polymerization of at least one organic compound having carboxyl groups, of at least one diamine compound and optionally at least one diacid compound.

Description

technical field [0001] The present invention relates to a process for the preparation of semiaromatic polyamideimides and to polyamideimides and compositions based on thermoplastic matrices comprising polyamideimides. The present invention relates more particularly to a process for the preparation of polyamideimides by melt polymerization of at least one organic compound having carboxyl groups, at least one diamine compound and optionally at least one diacid compound. Background technique [0002] Polyamideimides are polymers of great industrial and commercial importance. They are used especially in the field of refractory textiles or in the field of injection parts with high heat resistance. Among them, semiaromatic polyamideimide is particularly advantageous in terms of performance. Because they have intermediate properties between aromatic polyamideimides on the one hand and, for example, aliphatic polyamides on the other hand. Aramid-imides are high-performance polyme...

Claims

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Application Information

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IPC IPC(8): C08G73/14C08G73/10C08L79/08C08L77/06
CPCC08G73/1082C08L77/06C08G73/14C08G73/1075C08L79/08
Inventor F・图劳德V・博森耐克S・杰奥
Owner RHODIA OPERATIONS SAS
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