Block copolyamide and preparation thereof

A technology of copolyamide and block copolymer, which is applied in the field of block copolyamide and its preparation, can solve the problems of high cost, low-temperature resilience and poor flexibility of nylon resin, and achieve improved performance, reduced cost, and sufficient and simple preparation process Effect

Inactive Publication Date: 2006-03-15
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention provides a block copolyamide and its preparation method in order to solve t

Method used

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  • Block copolyamide and preparation thereof
  • Block copolyamide and preparation thereof
  • Block copolyamide and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Preparation of block copolymerized PA611:

[0025] Using caprolactam (PA6) as raw material, adding monomer and 5-50wt% (calculated by monomer weight) deionized water into a stirring autoclave, the amount of feed to the polymerization tank does not exceed 2 / 3 of the volume of the tank. Replace the air in the polymerization kettle with nitrogen for 4-5 times, heat it, and keep the reactant under the condition of self-generated pressure for 2 hours when the temperature reaches 190°C, exhaust and depressurize to ambient pressure, heat to 220°C and vacuum for 60 Minutes, according to the actual viscosity of the reaction product, fill it with nitrogen and discharge it, cool it in a water tank, and cut it into pellets to obtain a PA6 prepolymer.

[0026] For the treatment of PA6 prepolymer, since the caprolactam monomer is soluble in water, boiling water can be used to remove the unreacted caprolactam monomer, that is, put the product into a certain amount of water, boil it, k...

Embodiment 2

[0053] Preparation of block copolymerized PA11 / 12:

[0054] With 11-aminoundecanoic acid (PA11), 12-aminododecanoic acid (PA12) and deionized water as raw materials, with a stirring autoclave of 10L, the polymerization of the oligomer can be carried out smoothly according to the preparation process of Example 1 Implementation, the proportioning of the prepolymer in the block copolyamide, the polymerization conditions and the process are the same as in Example 1.

[0055] The molecular weight of the prepolymer and the physical properties of the obtained block copolymerized PA11 / 12 are shown in Table 3.

[0056] table 3

[0057]

[0058] Polymerization vacuum (MPa)

Embodiment 3

[0060] Preparation of block copolymerized PA6 / 11 / 12:

[0061] With caprolactam (PA6), 11-aminoundecanoic acid (PA11), 12-aminododecanoic acid 9 (PA12) and deionized water as raw materials, with a 10L agitated autoclave, the polymerization of oligomers is according to the examples The preparation process of 1 can be implemented smoothly, the polymerization conditions and process of the block copolyamide are the same as in Example 1, and the proportioning ratio of the prepolymer in the block copolyamide is shown in Table 4.

[0062] Table 4

[0063]

[0064] The physical properties of the obtained block copolymerized PA6 / 11 / 12 and the molecular weight of the prepolymer are shown in Table 5.

[0065] table 5

[0066]

[0067] Intrinsic viscosity η r

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Abstract

A segmented copolyamide and its production are disclosed. The copolyamide consists of any one of monomer 11-amino-hendecanoic acid, 12-amino-lauric acid and 6-amino acetic acid or hydantoinamine, glycine, propalanine, 8-aminocaprylic acid or octane lactam, 9-amino-nonoic acid or nonane lactam, 10-amino-qunane acid or quinane lactam, 11-amino-hendecanoic, dodecanoic lactam or 12-amino-lauric acid or 14-amino-tetradecoic acid. The process is carried out by copolymerization reacting the raw materials with their related preformed polymer. It achieves low cost, various nylon resin products and better properties.

Description

technical field [0001] The invention relates to a copolyamide and a preparation method thereof, in particular to a block copolyamide and a preparation method thereof. Background technique [0002] Polyamide, commonly known as nylon, has excellent properties and is widely used in automobiles, electronics and other fields. In particular, nylon 11 based on 11-aminoundecanoic acid or nylon 12 based on dodecyl lactam or 12-aminododecanoic acid has the general generality and good comprehensive properties of polyamides, and has unique physical and chemical properties, such as relative The density is small, the mechanical properties are less affected by water absorption, and the impact strength is good at low temperature. But nylon 11 or nylon 12 is expensive, and more importantly, it cannot be made into a hose without adding plasticizers, and gasoline is a good solvent for plasticizers, so once nylon encounters gasoline, it will denature and cannot be used normally . Commercial ...

Claims

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Application Information

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IPC IPC(8): C08G69/48C08G81/00
Inventor 胡国胜王标兵高凤珍张静婷马忠平
Owner ZHONGBEI UNIV
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