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Thermoplastic polyurethane resin for melt spinning

A technology of polyurethane urea and resin, applied in the field of manufacturing this thermoplastic polyurethane resin, thermoplastic polyurethane urea resin

Inactive Publication Date: 2002-01-16
SK CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To this end, research is carried out in terms of excluding fundamental limitations and solving problems arising during excluding

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment I

[0085] Polybutylene adipate (PBHA, Mw=1,000), a polyol, was dried in a vacuum oven at 120° C. for 5 hours so that the water content of the raw material for preparing the preester was 150 ppm or less. Melt methane diphenyl-4,4'-diisocyanate (MDI) in a 45°C oven.

[0086] A round-bottomed cylindrical reactor configured with a controllable stirrer is placed in an oil bath maintained at 90° C., and diisocyanate and polyol (equivalent ratio: diisocyanate: polyol=1.80:1.00) are put into the reactor mixture. In the presence of 10-100 ppm organotin catalyst such as T-10, react for 5 minutes or longer while stirring at 1,000 rpm to obtain a prepolymer. The progress of the reaction to prepare the prepolymer was monitored by monitoring the current change on the stirrer motor, which was found to reach a maximum point after 2 minutes of stirring.

[0087] To provide the prepolymer with amine functionality, 0.80 equivalents of water were added with stirring. This reaction produces CO 2 ...

Embodiment II

[0090] Repeat the steps of Example 1, using MDI with an equivalent ratio of 1.80: 1.0: 0.80: PBHA-1500: H 2 O. The physical properties of the polymer obtained are listed in Table 1 below.

Embodiment III

[0092] The same steps as in Example 1 were repeated, except that polybutylene ether glycol (PTMG, Mw=1,000) was used as the polyol, and MDI:PTMG-1000:H with an equivalent ratio of 1.80:1.0:0.80 was used. 2 O. The physical properties of the polymer obtained are listed in Table 1 below.

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PUM

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Abstract

There is disclosed a polyurethaneurea resin consisting of a polymer represented by the following chemical formula (I): [A-O-(O)C-NH-D-NH-C(O)-NH-D-NH-C(O)-O]n wherein A represents an organopolyol residue having a number average molecular weight of approximately 500 to 5,000 and a weight average molecular weight / number average molecular weight (MW / MN) of 1.5 to 2.5 with the number of functional groups ranging from 1.8 to 2.2, D represents an aromatic organodiisocyanate residue ranging, in the number of functional groups, from 1.8 to 2.2, and n represents the number of repeat units. This resin is superior in thermal resistance and elastic recovery, so that it is suitable to melt spinning to make useful elastic fibers.

Description

field of invention [0001] Generally speaking, the present invention relates to polyurethane elastomers, in particular, the present invention relates to a thermoplastic polyurethane urea resin with high heat resistance and high elastic recovery. The present invention also relates to methods of making such thermoplastic polyurethane resins. Background of the invention [0002] As known in the art, there are generally four methods for producing elastic fibers: dry spinning, wet spinning, chemical spinning and melt spinning. Among them, the most commonly used is dry spinning, which can achieve the best physical properties. Examples of such methods are disclosed in US Patent Nos. 4,973,647 and 5,362,432. [0003] However, at the time of spinning, the conventional dry spinning method must remove or evaporate the solvent used for polymerizing such a polyurethane-urea resin solution by solution. For this, complex devices are required. Removing or evaporating the solvent creates ...

Claims

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Application Information

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IPC IPC(8): C08G18/40C08G18/10C08G18/28C08G18/48C08G18/76D01F6/70D01F6/72
CPCC08G18/7671C08G18/4854D01F6/70C08G18/10C08G18/305C08G18/28
Inventor 安便老安东均
Owner SK CHEM CO LTD
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