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Long carbon chain semi-aromatic transparent nylon and its synthesis method

A semi-aromatic, synthetic method technology, applied in the field of materials, can solve the problems of restricting the large-scale popularization of solid-phase polymerization, accelerating the discharge of small molecules of by-products, and many solid-phase polymerization production processes, and achieving high mechanical properties and light transmittance. , Excellent processing performance, the effect of reducing the process

Active Publication Date: 2017-10-10
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since solid-phase polymerization is generally carried out at 15-30°C below the melting point of the prepolymer, the reaction rate is slow and the reaction time is long, and the production process of solid-phase polymerization is complex and complex, requiring high equipment parameters, and the reaction is slow. It is necessary to ensure that the ratio of functional groups is close to 1:1, and vacuum or air flow is required to accelerate the discharge of small molecules of by-products during the viscosity-increasing stage, thereby increasing the molecular weight of polycondensation products. Therefore, the above conditions limit the large-scale promotion of solid-phase polymerization

Method used

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  • Long carbon chain semi-aromatic transparent nylon and its synthesis method
  • Long carbon chain semi-aromatic transparent nylon and its synthesis method
  • Long carbon chain semi-aromatic transparent nylon and its synthesis method

Examples

Experimental program
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Effect test

Embodiment 1

[0075] The raw material composition and synthetic steps of the polyester amide used in the present embodiment are as follows:

[0076](1) Vacuum-dried monomer 2: 1006.6g (5mol) 11-aminoundecanoic acid, 456.6g (4mol) 6-caprolactone, 270.3g (1.25mol) 2,2'-(1,3 -Phenylene)-bisoxazoline was added to the stirred polymerization reactor, and tetrabutyl titanate (17.3 g) of 1% of the total weight of monomer 2 was added as a catalyst, and 500 mL of water was added as a mass transfer and heat transfer Then vacuumize for 5 minutes, pass nitrogen for 5 minutes, and circulate like this for 6 times, so that the reactant exists in the environment under nitrogen protection, and the system pressure in the stirred polymerization reactor is controlled to be 0.2MPa;

[0077] (2) within 2.5 hours, heat the stirred polymerization reactor to 250°C at a uniform speed, and adjust the stirring speed of the stirred polymerization reactor to 40r / min, wherein, when the temperature of the stirred polymeriz...

Embodiment 2

[0082] The raw material composition and synthesis steps of the polyester amide used in this example are the same as those in Example 1.

[0083] This embodiment is a synthetic method of long carbon chain semi-aromatic transparent nylon, comprising the following steps:

[0084] (1) Add monomer 1 after vacuum drying: 116.2g (1mol) hexamethylenediamine, 108.0g (0.65mol) isophthalic acid, 80.6g (0.35mol) dodecanedioic acid to the stirred polymerization reactor In, add the polyester amide of 8% (24.4g) of monomer 1 gross weight simultaneously, the long carbon chain carboxylic acid calcium salt of 0.3% (0.9g), the benzoic acid of 2% (6.1g), 0.3% (0.9g) g) N,N`-bis(2,2,6,6-tetramethyl-4-piperidinyl)-1,3-phthalamide, add 100mL water as the medium of mass transfer and heat transfer; then pump Vacuum for 5 minutes, nitrogen for 5 minutes, and so on for 6 times, so that the reactants exist in the environment under the protection of nitrogen, and the system pressure in the stirred polyme...

Embodiment 3

[0087] The raw material composition and synthesis steps of the polyester amide used in this example are the same as those in Example 1.

[0088] This embodiment is a synthetic method of long carbon chain semi-aromatic transparent nylon, comprising the following steps:

[0089] (1) Add monomer 1 after vacuum drying: 116.2g (1mol) hexamethylenediamine, 149.5g (0.9mol) isophthalic acid, 23.0g (0.1mol) dodecanedioic acid to the stirred polymerization reactor In, add the polyester amide of 2% (5.8g) of monomer 1 gross weight simultaneously, the long carbon chain carboxylic acid calcium salt of 0.2% (0.6g), the benzoic acid of 0.5% (1.4g), 0.2% (0.6g) g) N,N`-bis(2,2,6,6-tetramethyl-4-piperidinyl)-1,3-phthalamide, add 100mL water as the medium of mass transfer and heat transfer; then pump Vacuum for 5 minutes, nitrogen for 5 minutes, and so on for 6 times, so that the reactants exist in the environment under the protection of nitrogen, and the system pressure in the stirred polymer...

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Abstract

The invention discloses long-carbon-chain semi-aromatic transparent nylon and a synthesis method thereof. The long-carbon-chain semi-aromatic transparent nylon has the structure shown in the formula I (shown in the description); in the formula I, a is equal to 10-100, b is equal to 10-200, c is equal to 10-100, d is equal to 10-100, and R is polyesteramide. The long-carbon-chain semi-aromatic transparent nylon has a relatively high mechanical property, relatively high transmittance, low water absorption and excellent processabilityand can be applied to the fields of peripheral mechanical parts and electrical mechanical parts adopting fuel and oil, precision optical instruments, pressure-resistant windows, observation mirrors, special lamp outer covers, food packaging films, high-end sport equipment and the like.

Description

technical field [0001] The invention relates to the field of materials, in particular to a long carbon chain semi-aromatic transparent nylon and a synthesis method thereof. Background technique [0002] Transparent polyamide (transparent nylon) is a polymer material with excellent comprehensive properties. It not only has the advantages of high mechanical strength, good thermal stability, and excellent corrosion resistance, but also has the advantages of easy molding and processing, dimensional stability, small linear expansion coefficient, high cost performance, excellent electrical insulation and aging resistance, non-toxic, Odorless, easy to form alloys with other amorphous or semi-crystalline polyamides; not only excellent transparency (transparency even exceeds PC, close to PMMA), but also resistant to environmental stress cracking, oily solvents, scratches, and Wear and other aspects are superior to general transparent polymer materials (such as PS, PC, PMMA, etc.). ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G69/26C08G69/28C08G69/44C08K5/098C08K5/3435
CPCC08G69/265C08G69/28C08G69/44C08K5/098C08K5/3435
Inventor 胡国胜张静婷王忠强石哲平师文博方春晖刘冰肖许和伟
Owner ZHONGBEI UNIV
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