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A kind of preparation method of twin-screw reactive extrusion nylon elastomer

A nylon elastomer and reactive extrusion technology, which is applied in the field of twin-screw reactive extrusion nylon elastomer preparation, can solve problems such as low reactivity, limited use range, complex process, etc., and achieve labor cost reduction, product quality and Its excellent stability effect

Active Publication Date: 2019-05-10
ZHEJIANG SUHZ TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has problems such as complex process, low output, solvent pollution, large energy consumption, high cost and low reactivity between raw materials.
Therefore, the price of nylon elastomers on the market is high, which limits the scope of use.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1) Prepare the following ingredients:

[0028] Lauryl lactam 160g

[0029] Deionized water 6g

[0030] Adipic acid 23.4g

[0031] Antioxidant 1010 0.6g

[0032] Ethylene glycol 10g;

[0033] 2) Add laurolactam, deionized water, adipic acid and antioxidant 1010 into the reaction kettle and dissolve at 150°C;

[0034] 3) Raise the temperature of the reactor to 250°C, control the stirring speed at 60RPM, and keep the reaction under 20bar pressure for 12h;

[0035] 4) Add ethylene glycol in the reactor;

[0036] 5) Reaction under 600mmHg negative pressure at 230°C for 8 hours to obtain a nylon oligomer;

[0037] 6) 200g of nylon oligomer obtained in step 5, 150g of polyether polyol PTMEG1000, and 87.5g of isocyanate MDI were mixed at a high speed in liquid form, and poured into a twin-screw machine, and extruded to obtain a nylon elastomer. The twin-screw reaction temperature was controlled at 200-260°C, screw speed at 400RPM.

Embodiment 2

[0039] 1) Prepare the following ingredients:

[0040] Caprolactam 123g

[0041] Deionized water 6g

[0042] Terephthalic acid 60g

[0043] Antioxidant 1010 1g

[0044] Diethylene glycol amine 10g;

[0045] 2) Add caprolactam, deionized water, terephthalic acid and antioxidant 1010 into the reactor and keep warm at 150°C to dissolve;

[0046] 3) Raise the temperature of the reactor to 300°C, control the stirring speed at 100RPM, and keep the reaction under 22bar pressure for 12h;

[0047] 4) Diethylene glycol amine is added in the reactor;

[0048] 5) Reaction under 100mmHg negative pressure at 260°C for 10 hours to obtain a nylon oligomer;

[0049] 6) 200g of nylon oligomer obtained in step 5, 120g of polyether polyol PTMEG1000, and 81.2g of isocyanate MDI were mixed at a high speed in liquid form, and poured into a twin-screw machine, and extruded to obtain a nylon elastomer. The twin-screw reaction temperature was controlled at 200-260°C, screw speed at 500RPM.

Embodiment 3

[0051] 1) Prepare the following ingredients:

[0052] Caprolactam 120g

[0053] Deionized water 9.4g

[0054] Hexamethylenediamine 20g

[0055] Antioxidant 1010 0.6g

[0056] Tartaric acid 50g;

[0057] 2) Add caprolactam, deionized water, hexamethylenediamine and antioxidant 1010 into the reaction kettle and dissolve at 150°C;

[0058] 3) Raise the temperature of the reactor to 250°C, control the stirring speed at 60RPM, and keep the reaction under 20bar pressure for 12h;

[0059] 4) add tartaric acid in reactor;

[0060] 5) Reaction under 600mmHg negative pressure at 230°C for 8 hours to obtain a nylon oligomer;

[0061] 6) 250g of nylon oligomer obtained in step 5, 94g of polyether polyol PTMEG1000, and 115g of isocyanate MDI were mixed in liquid form at high speed, and poured into a twin-screw machine, and extruded to obtain nylon elastomer. The twin-screw reaction temperature was controlled at 200 -260°C, screw speed at 500RPM.

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PUM

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Abstract

A method for preparing an extruded nylon elastomer in a twin-screw reactor. A hydroxyl-terminated nylon oligomer is prepared, then the oligomer is mixed with an isocyanate and a polyether polyol, and the elastomer is produced using a twin-screw one-step mass polymerization process. Batch production of the prior art is transformed to continuous automated controlled production, whereby annual output of a single line can be increased 3-5 fold, and labor costs reduced 1-3 fold, with improved product quality and stability of batch production processes.

Description

technical field [0001] The invention relates to the field of preparation of nylon elastomers, in particular to a preparation method of twin-screw reaction extrusion nylon elastomers. Background technique [0002] Nylon elastomers have the advantages of oil resistance, chemical resistance, wear resistance, super toughness and good resilience. The current method of producing nylon elastomers basically goes through two steps. The first step is to synthesize carboxyl-terminated nylon 6 and nylon 12. Wait for the intermediate product, and then add polyether polyol to the reaction kettle to obtain the product through negative compression polymerization. The method has problems such as complex process, low yield, solvent pollution, large energy consumption, high cost and low reactivity between raw materials. Therefore, the price of nylon elastomers on the market is high, which limits the scope of use. Contents of the invention [0003] Aiming at the above problems, the present ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G69/16C08G69/48C08G18/48C08G18/60C08G18/76C08K5/134
CPCC08G18/4054C08G18/4854C08G18/603C08G18/7671C08G69/16C08G69/48C08K5/1345
Inventor 吴中心雷景新李家庭周梦龙
Owner ZHEJIANG SUHZ TECH CO LTD