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Thermoplastic fluorinated polyurethane elastomer and preparation method thereof

A polyurethane elastomer and thermoplastic technology, which is applied in the field of thermoplastic fluorine-containing polyurethane elastomer and its preparation, can solve the problems of long reaction cycle, high cost, and complicated preparation process, and achieve low production cost, simple operation, and low energy consumption. Effect

Inactive Publication Date: 2013-08-14
SHANGHAI INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] One of the purposes of the present invention is to provide a short reaction cycle, simple preparation process, low cost and suitable for scale in order to solve the technical problems of long reaction cycle, complicated preparation process and high cost in the above-mentioned preparation method of thermoplastic fluorine-containing polyurethane elastomer. Chemically produced thermoplastic fluorine-containing polyurethane elastomer preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A thermoplastic fluorine-containing polyurethane elastomer, calculated in parts by weight, its raw material composition and content are as follows:

[0034] 65.6 parts of non-fluorine macromolecular polyols

[0035] Perfluoropolyether diol 9.4 parts

[0036] Small molecule chain extender 1.9 parts

[0037] Polyisocyanate 23.2 parts

[0038] Described non-fluorine macromolecule polyol is the polybutylene adipate diol of molecular weight 1000g / mol;

[0039] The molecular formula of the perfluoropolyether glycol is HO- n (CH 2 CH 2 O)-CH 2 -CF 2 O-(CF 2 CF 2 O) m -(CF 2 O) n -CF 2 -CH 2 -(OCH 2 CH2 ) n -OH, wherein n is 2, m is 15, and its molecular weight is 1000 g / mol;

[0040] The small molecule chain extender is 1,4-butanediol;

[0041] The polyisocyanate is 4,4¢-diphenylmethane diisocyanate.

[0042] The preparation method of the above-mentioned thermoplastic fluorine-containing polyurethane elastomer is to use a composite resin composed of a perflu...

Embodiment 2

[0049] A thermoplastic fluorine-containing polyurethane elastomer, calculated in parts by weight, its raw material composition and content are as follows:

[0050] 45.4 parts of non-fluorine macromolecular polyol

[0051] Perfluoropolyether diol 4.6 parts

[0052] Small molecule chain extender 19.2 parts

[0053] Polyisocyanate 44.3 parts

[0054] The non-fluorine macromolecular polyol is polytetrahydrofuran ether glycol (PTMG) with a molecular weight of 3000 g / mol;

[0055] The molecular formula of the perfluoropolyether glycol is HO- n (CH 2 CH 2 O)-CH 2 -CF 2 O-(CF 2 CF 2 O) m -(CF 2 O) n -CF 2 -CH 2 -(OCH 2 CH 2 ) n -OH, wherein n is 2, m is 15, and its molecular weight is 1000 g / mol;

[0056] The small molecule chain extender is 1,6-cyclohexanediol;

[0057] The polyisocyanate is 2,4-toluene diisocyanate (TDI).

[0058] The preparation method of the above-mentioned thermoplastic fluorine-containing polyurethane elastomer is to use a composite resin com...

Embodiment 3

[0063] A thermoplastic fluorine-containing polyurethane elastomer, calculated in parts by weight, its raw material composition and content are as follows:

[0064] Non-fluorine macromolecular polyol 48.7 parts

[0065] Perfluoropolyether diol 16.3 parts

[0066] Small molecule chain extender 4.6 parts

[0067] Polyisocyanate 29.1 parts

[0068] The non-fluorine macromolecular polyol is polycaprolactone diol (PCL) with a molecular weight of 1000 g / mol;

[0069] The molecular formula of the perfluoropolyether glycol is HO- n (CH 2 CH 2 O)-CH 2 -CF 2 O-(CF 2 CF 2 O) m -(CF 2 O) n -CF 2 -CH 2 -(OCH 2 CH 2 ) n -OH, wherein n is 2, m is 15, and its molecular weight is 1000 g / mol;

[0070] The small molecule chain extender is 1,4-butanediol;

[0071] The polyisocyanate is 4,4¢-dicyclohexylmethane diisocyanate (HMDI).

[0072] The preparation method of the above-mentioned thermoplastic fluorine-containing polyurethane elastomer is to use a composite resin composed ...

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Abstract

The invention discloses a thermoplastic fluorinated polyurethane elastomer and a preparation method thereof. The thermoplastic fluorinated polyurethane elastomer is composed of non-fluorinated macromolecular polyols, perfluor polyether glycol, a micromolecular chain extender and polyisocyanates; and the preparation method comprises the following steps of: adding perfluor polyether glycol and non-fluorinated macromolecular polyols into a container; after the obtained fluorinated composite resin is stirred for 10-20 minutes at a speed of 2000-3000 r / min, carrying out vacuum dehydration on the obtained fluorinated composite resin; sequentially adding polyisocyanates and the micromolecular chain extender into the obtained product; continuing to stir the obtained mixture for 3-5 minutes, and pouring the obtained mixture in a preheated die; and after the obtained mixture is subjected to curing forming for 2-4 hours at a controlled temperature of 15-30 DEG C, respectively carrying out vacuum curing on the obtained product for 1-2 hours at a temperature of 50-80 DEG C, carrying out vacuum curing on the obtained product for 1-2 hours at a temperature of 90-110 DEG C, and carrying out vacuum curing on the obtained product for 15-24 hours at a temperature of 120-140 DEG C, thereby obtaining the thermoplastic fluorinated polyurethane elastomer with a low fluoride content and excellent surface and mechanical properties.

Description

technical field [0001] The invention specifically relates to a thermoplastic fluorine-containing polyurethane elastomer and a preparation method thereof, belonging to the technical field of polymer materials. Background technique [0002] Thermoplastic polyurethane (hereinafter referred to as TPU) elastomer not only has excellent characteristics such as high elasticity, high strength, high wear resistance, and processability, but also has the advantages of good anticoagulation and biocompatibility with the human body, and is recognized as a comprehensive performance The optimal polymer biomaterials have good application prospects in vascular grafts, interventional catheters, ventricular assisted circulatory systems and artificial hearts. The unique microphase separation structure of TPU endows it with good anticoagulant and biocompatibility, but in the process of repeated deformation, the structure will be destroyed, resulting in the increase of surface free energy, which di...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/50C08G18/42C08G18/48C08G18/44C08G18/08
Inventor 贾润萍宗安新代丽王彩峰魏路田凯黄茂松
Owner SHANGHAI INSTITUTE OF TECHNOLOGY
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