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PA6 (polyamide 6) type thermoplastic elastomer and preparation method thereof

A thermoplastic elastomer and elastomer technology, applied in the field of segment hard segment, can solve the problems of operator's health and surrounding environment, complicated solvent removal process, long reaction time, etc., and achieve good noise reduction effect, high toughness and high molecular weight. Effect

Active Publication Date: 2010-06-23
SHANGHAI YITAN NEW MATERIAL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Phosgene is highly toxic, and a little carelessness will have a serious impact on the health of operators and the surrounding environment
[0013] U.S. Patent No. 4,238,528 discloses a polyamide elastomer synthesized by esterified soft segments prepared from diacids and diols and amide hard segments prepared from MDI and diacids. The diacids used are aliphatic diacids. The hard segment is a semi-aromatic amide, not an aliphatic amide, and the reaction is all carried out in a polar solvent. The removal process of the solvent in the later stage is quite complicated, and the reaction time is quite long, more than 20 hours

Method used

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  • PA6 (polyamide 6) type thermoplastic elastomer and preparation method thereof
  • PA6 (polyamide 6) type thermoplastic elastomer and preparation method thereof
  • PA6 (polyamide 6) type thermoplastic elastomer and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0043] Add 2000 parts of caprolactam, 60 parts of desalted water and 110 parts of adipic acid in the polymerization kettle, one part has a mass of 1 g, and after reacting for 4 hours at 3 bar pressure and 250 ° C, add 200 parts of 4'4- after cooling down to 230 ° C Diphenyl tetralkane diisocyanate (MDI), after continuing to react for 1 hour, add 280 parts of PTMG (2000) and 80 parts of isobutyl titanate, and continue to react for 4 hours at 230 ° C under stirring at a speed of 800 r / min. Then vacuumize to 50pa and continue the reaction for 1 hour. After boiling water extraction and drying, a light yellow polyamide thermoplastic elastomer with a soft segment content of 11% is obtained, with a tensile strength of 30.5Mpa, an elongation at break of 580%, and a Shore hardness of 70D.

Embodiment 2

[0045] Add 1000 parts of caprolactam, 40 parts of desalted water and 60 parts of adipic acid into the polymerization kettle, one part has a mass of 1 g, and after reacting for 3 hours at 5 bar pressure and 240 ° C, add 300 parts of 4'4-diphenyl tetra Alkane diisocyanate (MDI), after continuing to react for 1 hour, add 500 parts of PTMG (1000) and 80 parts of isobutyl zirconate, continue to react for 4 hours at 240 ° C, under stirring at a speed of 300 r / min, and then evacuate to Continue the reaction at 20 Pa for 1 hour, extract with boiling water and dry to obtain a light yellow polyamide thermoplastic elastomer with a soft segment content of 50%, a tensile strength of 12.5Mpa, an elongation at break of 350%, and a Shore hardness of 45D.

Embodiment 3

[0047] Add 1000 parts of caprolactam, 20 parts of desalted water and 30 parts of oxalic acid into the polymerization kettle, one part has a mass of 1g, react at 8bar pressure and 245°C for 5 hours, then add 100 parts of 1,5 naphthalene after cooling down to 225°C Diisocyanate (NDI), after continuing to react for 0.5 hours, add 100 parts of PEG (2000) and 50 parts of n-butyl zirconate, continue to react for 4 hours at 235 ° C, under stirring at a speed of 400 r / min, and then vacuumize to 500 Pa The reaction was continued for 0.5 hour, and after boiling water extraction and drying, a polyamide thermoplastic elastomer with a soft segment content of 50% was obtained, the tensile strength was 12.5 MPa, the elongation at break was 350%, and the Shore hardness was 42D.

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Abstract

The invention relates to a PA6 (polyamide 6) type thermoplastic elastomer and a preparation method thereof, in particular to a PA6 type thermoplastic elastomer containing polyether and diisocyanate blocks and a preparation method thereof, more particularly to a method for preparing a block copolymer thermoplastic elastomer by firstly preparing PA6 and diisocyanate hard blocks by adopting a hydrolysis ring-opening polymerization method and then carrying out esterification and polycondesation with polyether soft blocks. The PA6 type thermoplastic elastomer comprises the hard blocks consisting of the PA6 and the diisocyanate blocks, polyol soft blocks, hard blocks and soft blocks, which alternately exist in the thermoplastic elastomer; and the hard blocks consisting of the PA6 and the diisocyanate blocks comprise two PA6 segmers and one diisocyanate block. The PA6 type thermoplastic elastomer has high tenacity, strong abrasive resistance and good elasticity. The preparation method of the PA6 type thermoplastic elastomer has simple process, one-step hydrolysis of reaction, higher molecular weight, good elasticity, adjustable Shore hardness, good abrasive resistance, good erasure effect and reduced damp attenuation.

Description

technical field [0001] The present invention relates to a kind of PA6 type thermoplastic elastomer and its preparation method, especially to a kind of PA6 type thermoplastic elastomer containing polyether and diisocyanate block and its preparation method, specifically a kind of adopting hydrolysis ring-opening polymerization A method of preparing PA6 and diisocyanate block hard segments, and then esterifying and polycondensing polyether soft segments to prepare block copolymer thermoplastic elastomers. Background technique [0002] Polyamide thermoplastic elastomer is a kind of thermoplastic elastomer with excellent performance and wide application. The molecular chain is composed of hard segments composed of polyamides and soft segments composed of polyethers. The molecular weight of each segment generally does not exceed 4000, and each molecular chain is generally larger than a triblock. [0003] The synthesis methods of polyamide thermoplastic elastomers can generally b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G81/00
Inventor 易春旺彭治汉李羿王华平王朝生
Owner SHANGHAI YITAN NEW MATERIAL CO LTD
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