Polyamide composition, method for producing same, and molded article

A polyamide composition and polyamide technology, applied in the field of polyamide composition and its manufacture and molded products, can solve problems such as adverse effects on mechanical properties, and achieve good long-term heat resistance and excellent flame retardancy

Pending Publication Date: 2020-04-07
ASAHI KASEI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that in order to achieve the flammability classification V-0 by using a phosphinic acid flame retardant, it is necessary to add a large amount, and the adverse effect on the mechanical properties is a problem.

Method used

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  • Polyamide composition, method for producing same, and molded article
  • Polyamide composition, method for producing same, and molded article
  • Polyamide composition, method for producing same, and molded article

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0369] Hereinafter, the present invention will be described in detail with reference to specific examples and comparative examples, but the present invention is not limited to the following examples.

[0370] Hereinafter, each constituent component of the polyamide composition used in this Example and a comparative example is demonstrated.

[0371]

[0372] [(A) Aliphatic polyamide]

[0373] A-1: Polyamide 66

[0374] A-2: polyamide 6 (manufactured by Ube Industries, model: SF1013A, molecular weight: 33000)

[0375] [(B) Semi-aromatic polyamide]

[0376] B-1: Polyamide 6I

[0377] B-2: Polyamide 6I / 6T (manufactured by EMS Co., model: G21, content of isophthalic acid units in all dicarboxylic acid units: 70 mol%, molecular weight: 27000)

[0378] B-3: Polyamide MXD6 (made in Toyobo Co., Ltd., brand name: Toyobo nylon, T-600)

[0379] [(C) Phosphinates]

[0380] C-1: Phosphinate-based flame retardant aluminum diethylphosphinate (manufactured by Clariant, trade name: "Exo...

Synthetic example 1

[0400] [Synthesis Example 1] Synthesis of Aliphatic Polyamide A-1 (Polyamide 66)

[0401] The polymerization reaction of polyamide was implemented by the "hot-melt polymerization method" as follows.

[0402] First, 1,500 g of an equimolar salt of adipic acid and hexamethylenediamine was dissolved in 1,500 g of distilled water to prepare an equimolar 50 mass % homogeneous aqueous solution of the raw material monomers. This aqueous solution was poured into an autoclave having an internal volume of 5.4 L, and replaced with nitrogen. Next, while stirring at a temperature of about 110° C. to about 150° C., water vapor was gradually discharged and concentrated to a solution concentration of 70% by mass. Next, the internal temperature was raised to 220°C. At this time, the pressure of the autoclave was increased to 1.8 MPa. This state was maintained for 1 hour until the internal temperature reached 245° C., and the reaction was carried out for 1 hour while slowly discharging water...

Synthetic example 2

[0404] [Synthesis Example 2] Synthesis of Semiaromatic Polyamide B-1 (Polyamide 6I)

[0405] Polyamide polymerization was carried out by the "hot melt polymerization method" as described above.

[0406] First, 1,500 g of an equimolar salt of isophthalic acid and hexamethylenediamine, and 1.5 mol% of adipic acid in excess relative to the entire equimolar salt component, and 0.5 mol% of acetic acid were dissolved in 1,500 g of distilled water, thereby An equimolar 50% by mass homogeneous aqueous solution of the raw material monomers was prepared. Next, while stirring at a temperature of about 110° C. to about 150° C., water vapor was gradually discharged and concentrated to a solution concentration of 70% by mass. Next, the internal temperature was raised to 220°C. At this time, the pressure of the autoclave was increased to 1.8 MPa. This state was maintained for 1 hour until the internal temperature reached 245° C., and the reaction was carried out for 1 hour while slowly di...

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Abstract

The invention relates to a polyamide composition, a method for producing the same, and a molded article. Provided is a polyamide composition which does not contain halogen, but has excellent flame retardancy and good long-term heat resistance when formed into a molded article. The polyamide composition containes (A) an aliphatic polyamide; (B) a semi-aromatic polyamide containing a diamine unit and a dicarboxylic acid unit; (C) at least one phosphinic acid salt selected from the group consisting of phosphinic acid salts represented by general formula (1), diphosphinic acid salts represented bygeneral formula (2), and condensates thereof; and (D) a polymer having an oxygen index of 27% or more and having an aromatic group in the main chain, the content of the polymer (D) being 0.1-8% by mass relative to the total mass of the aliphatic polyamide (A), the semi-aromatic polyamide (B), the phosphinic acid salt (C), and the polymer (D).

Description

technical field [0001] The present invention relates to a polyamide composition, a method for producing the same, and a molded article Background technique [0002] Compositions based on aliphatic polyamides have excellent properties and are therefore used in the manufacture of moldings in a wide variety of applications. Polyamide compositions having flame retardant properties are essential for building blocks in the electrical and electronics industry, especially in order to ensure proper fire protection. [0003] Polyamides are often flame retardant treated by adding halogen compounds. However, recently, according to hazardous substance regulations such as RoHS (Restriction of Hazardous Substances Directive) and PoHS (Prohibition of Specific Hazardous Substances in Consumer Products), various regulations have been established so that products containing halogen-containing compounds are not used in electrical and electronic components. Therefore, various halogen-free flam...

Claims

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Application Information

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IPC IPC(8): C08L77/06C08L77/02C08L81/02C08L71/12C08L81/06C08K5/5313
CPCC08L77/06C08L77/02C08L2201/02C08L2201/22C08L2201/08C08L2205/025C08L2205/03C08L2205/02C08L81/02C08K5/5313C08L71/12C08L81/06C08L77/00C08G69/26C08G69/265C08G69/14C08K7/14C08L71/126
Inventor 渡边将史永濑康一家田真次荒木祥文
Owner ASAHI KASEI KK
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