Unlock instant, AI-driven research and patent intelligence for your innovation.

Polyamide copolymer and molded article

A polyamide copolymer and copolymer technology, applied in the field of polyamide copolymers and molded products, can solve the problems of large changes and insufficient rigidity improvement, and achieve the effect of excellent rigidity

Active Publication Date: 2012-05-30
ASAHI KASEI KK
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, in the technology disclosed in Patent Document 4, the improvement of rigidity after water absorption is not sufficient, so there is a problem that the physical properties vary greatly depending on the use environment similarly to the above.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Polyamide copolymer and molded article
  • Polyamide copolymer and molded article
  • Polyamide copolymer and molded article

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0147] [Example 1] Production of polyamide copolymer (a1)

[0148] 517.0 g (3.54 moles) of adipic acid, 55.1 g (0.33 moles) of isophthalic acid, 285.5 g (1.66 mol) and 642.3 g (5.53 mol) of hexamethylenediamine were dissolved in 1500 g of distilled water to prepare an equimolar 50% by mass homogeneous aqueous solution of the raw material monomers. This aqueous solution was charged into an autoclave with an internal volume of 5.4 L, and nitrogen substitution was performed. Water vapor was slowly removed while stirring at a temperature of 110 to 150° C., and concentrated to a solution concentration of 70% by mass. Then, the internal temperature was raised to 218°C. At this time, the pressure of the autoclave was increased to 1.8 MPa. Then, the reaction was carried out for 1 hour while gradually removing water vapor while maintaining a pressure of 1.8 MPa until the internal temperature reached 270°C. Then, the pressure was lowered to 1 MPa over 1 hour, and polymerization was ...

Embodiment 2

[0149] [Example 2] Production of polyamide copolymer (a2)

[0150] In addition to using 440.9 g (3.02 moles) of adipic acid, 91.1 g (0.55 moles) of isophthalic acid, and 330.6 g (330.6 g) of 1,4-cyclohexanedicarboxylic acid ( 1.92 mol) and 637.4 g (5.49 mol) of hexamethylenediamine were polymerized by the method described in Example 1 to obtain a polyamide copolymer. At this time, the final internal temperature of the polymerization was 291°C. The trans isomer ratio of the 1,4-cyclohexanedicarboxylic acid component contained in the obtained polyamide copolymer was 71.4 mol%. Table 1 shows the composition of the obtained polyamide copolymer (a2). The proportions of the constituent units of the polyamide copolymers shown in Table 1 were obtained by carrying out 1 H-NMR analysis to obtain. The water absorption rigidity, thermal rigidity, and molded appearance of the obtained polyamide copolymer (a2) were evaluated by the methods described above. The evaluation results are sh...

Embodiment 3

[0151] [Example 3] Production of polyamide copolymer (a3)

[0152] In addition to using 509.4 g (3.49 moles) of adipic acid, 128.7 g (0.77 moles) of isophthalic acid, and 219.1 g (219.1 g) of 1,4-cyclohexanedicarboxylic acid ( 1.27 mol) and 642.9 g (5.53 mol) of hexamethylenediamine were polymerized by the method described in Example 1 to obtain a polyamide copolymer. At this time, the final internal temperature of the polymerization was 292°C. The trans isomer ratio of the 1,4-cyclohexanedicarboxylic acid component contained in the obtained polyamide copolymer was 71.8 mol%. Table 1 shows the composition of the obtained polyamide copolymer (a3). The proportions of the constituent units of the polyamide copolymers shown in Table 1 were obtained by carrying out 1 H-NMR analysis to obtain. The water absorption rigidity, thermal rigidity, and molded appearance of the obtained polyamide copolymer (a3) ​​were evaluated by the methods described above. The evaluation results are...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
lengthaaaaaaaaaa
diameteraaaaaaaaaa
lengthaaaaaaaaaa
Login to View More

Abstract

Provided is a polyamide copolymer having excellent rigidity after water absorption (water absorption rigidity) and excellent rigidity under high temperature use (thermal rigidity). The polyamide copolymer comprises a diamine component unit and a dicarboxylic acid component unit which includes (a) an adipic acid unit, (b) an isophthalic acid unit, and (c) a 1,4-cyclohexanedicarboxylic acid unit. The relationship between the content (unit: mol%) of (b) and the content (unit: mol%) of (c) satisfies formula (1) based on a total of 100 mol% of the dicarboxylic acid component unit including (a), (b), and (c). The formula (1) is (c) > (b) >= 0.1.

Description

technical field [0001] The present invention relates to polyamide copolymers and molded articles. Background technique [0002] Polyamide resins have been widely used as materials for various parts such as clothing, industrial materials, automobiles, electrical and electronic products, and industrial applications due to their excellent moldability, mechanical properties, and chemical resistance. [0003] In recent years, the environment in which polyamide resins are used has become harsher thermally and mechanically. Therefore, it is required to improve the mechanical properties, especially the rigidity after water absorption and the rigidity under high-temperature use, and to have less change in physical properties in all environments. Amide resin material. [0004] In order to meet these demands, as a method of improving mechanical properties, it is disclosed that 1,4-cyclohexanedicarboxylic acid containing 1 to 80 mol % of 1,4-cyclohexanedicarboxylic acid having a trans-...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C08G69/26
CPCC08L77/06C08K3/0033C08G69/28C08G69/265C08K3/013C08G69/26C08J5/00C08K3/00
Inventor 佐佐木幸义坂田范夫佐久间照章小山田洋
Owner ASAHI KASEI KK