Fully aromatic polyester and polyester resin composition

A technology of fully aromatic polyester and polyester resin, applied in the direction of single-component polyester rayon, single-component copolyester rayon, transportation and packaging, etc., can solve the problem of inability to ensure heat resistance , to achieve the effect of good heat resistance and excellent toughness

Inactive Publication Date: 2013-12-18
POLYPLASTICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, various methods have been tried in order to lower the melting point of such a high-melting wholly aromatic polyester to a temperature that can be processed by conventional melt processing equipment, and although the melting point can be lowered to some extent, there are The problem that heat resistance represented by mechanical strength at high temperature (near the melting point) cannot be ensured

Method used

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  • Fully aromatic polyester and polyester resin composition
  • Fully aromatic polyester and polyester resin composition
  • Fully aromatic polyester and polyester resin composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] Put the following raw material monomers, metal catalysts, and acylating agents into a polymerization vessel equipped with a stirrer, a reflux column, a monomer inlet, a nitrogen inlet, and a decompression / outflow line, and start nitrogen replacement.

[0075] (I) 4-Hydroxybenzoic acid 142g (48 mol%) (HBA)

[0076] (II) 6-Hydroxy-2-naphthoic acid 12g (3 mol%) (HNA)

[0077] (III) 1,4-phthalic acid 77g (21.7 mol%) (TA)

[0078] (IV) 1,3-phthalic acid 11g (3 mol%) (IA)

[0079] (V) 4,4'-dihydroxybiphenyl 97g (24.3 mol%) (BP)

[0080] Potassium acetate catalyst 15mg

[0081] Acetic anhydride 224g

[0082] After inputting the raw materials, the temperature of the reaction system was increased to 140°C and reacted at 140°C for 1 hour. Then, the temperature was further increased to 360°C over 5.5 hours, and then the pressure was reduced to 10 Torr (that is, 1330 Pa) over 20 minutes, and melt polymerization was carried out while distilling out acetic acid, excess acetic anhydride, and othe...

Embodiment 2～8

[0085] Except that the types of raw material monomers and the input ratio (mol%) are shown in Table 1, the same procedures as in Example 1 were carried out to obtain a polymer. These results are shown in Table 1.

Embodiment 9

[0091] Put the following raw material monomers, metal catalysts, and acylating agents into a polymerization vessel equipped with a stirrer, a reflux column, a monomer inlet, a nitrogen inlet, and a decompression / outflow line, and start nitrogen replacement.

[0092] (I) 4-Hydroxybenzoic acid 1041g (48 mol%) (HBA)

[0093] (II) 6-hydroxy-2-naphthoic acid 89g (3 mol%) (HNA)

[0094] (III) 565 g (21.7 mol%) of 1,4-phthalic acid (TA)

[0095] (IV) 1,3-phthalic acid 78g (3 mol%) (IA)

[0096] (V) 4,4'-Dihydroxybiphenyl 711g (24.3 mol%) (BP)

[0097] Potassium acetate catalyst 110mg

[0098] Acetic anhydride 1645g

[0099] After inputting the raw materials, the temperature of the reaction system was increased to 140°C and reacted at 140°C for 1 hour. Then, the temperature was further increased to 360° C. over 5.5 hours, and then the pressure was reduced to 5 Torr (that is, 667 Pa) over 20 minutes, and melt polymerization was performed while distilling out acetic acid, excess acetic anhydride, a...

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Abstract

The present invention provides a fully aromatic polyester that can be produced in a normal polymerization device and that has superior heat resistance and ductility. The fully aromatic polyester comprises: a constituent unit (I) derived from 4-hydroxybenzoic acid; a constituent unit (II) derived from 6-hydroxy-2-naphthoic acid; a constituent unit (III) derived from 1,4-phenylene dicarboxylic acid; a constituent unit (IV) derived from 1,3-phenylene dicarboxylic acid; and a constituent unit (V) derived from 4,4'-dihydroxybiphenyl. The fully aromatic polyester exhibits optical anisotropy when melted and, with respect to all the constituent units, there are 35-75 mol% of constituent unit (I), 2-8 mol% of constituent unit (II), 4.5-30.5 mol% of constituent unit (III), 2-8 mol% of constituent unit (IV), 12.5-32.5 mol% of constituent unit (V), and 4-10 mol% of constituent units (II)+(IV).

Description

Technical field [0001] The present invention relates to a wholly aromatic polyester and its composition which are excellent in heat resistance and toughness and can be produced by a usual polymerization device. Background technique [0002] As a fully aromatic polyester, currently commercially available fully aromatic polyesters contain 4-hydroxybenzoic acid as the main component. However, since the melting point of the homopolymer of 4-hydroxybenzoic acid is higher than the decomposition point, it is necessary to lower the melting point by copolymerizing various components. [0003] The wholly aromatic polyester, which uses 1,4-phthalic acid, 1,4-dihydroxybenzene, 4,4'-dihydroxybiphenyl, etc. as copolymer components, has a melting point as high as 350°C or higher. Too high for melt processing. In addition, various methods have been tried in order to lower the melting point of this high melting point wholly aromatic polyester to a temperature that can be processed by commonly use...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/60C08J5/00C08K3/34C08K7/14C08L67/00D01F6/62D01F6/84
CPCD01F6/84C08K3/34C08K7/14C08J5/043C08J2367/03C08K3/013Y10T428/1397C08G63/605C08L67/03C08G63/60C08J5/00D01F6/62
Inventor 横田俊明大竹峰生
Owner POLYPLASTICS CO LTD
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