Thermoplastic polyurethanes comprising polytrimethylene ether soft segments

A technology of thermoplastic polyurethane and methyl ether diol, applied in the direction of one-component polyurethane artificial filament, etc., can solve the problems of expensive, non-renewable and non-environmental friendly

Inactive Publication Date: 2008-12-17
EI DU PONT DE NEMOURS & CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the dry spinning process is an expensive, complicated and non-environmentally friendly process
Additionally, most of the ingredients used to make commercial polyurethane polymers and spandex are derived from fossil fuels and are non-renewable

Method used

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  • Thermoplastic polyurethanes comprising polytrimethylene ether soft segments

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0111] This example illustrates the preparation of a diisocyanate terminated polytrimethylene ether-urethane prepolymer.

[0112]Prepolymers were prepared as follows. Polytrimethylene ether glycol (2.885 kg) with a number average molecular weight of 2000 was dried to a moisture content below 500 ppm, and then added to a 5-L tank equipped with a mechanical stirrer, dropping funnel, thermocouple, and air inlet adapter (adapter). in a four-necked flask. IRGANOX 1098 antioxidant (2.3 g) (Ciba Specialty Chemicals, Tarrytown, NY) was added to the diol and mixed thoroughly. The mixture was then heated to 60°C under an inert nitrogen atmosphere. Molten (50°C) 4,4'-diphenylmethane diisocyanate (ISONATE 125M, Dow Chemical Company, Midland, MI) (1.665 kg) was slowly added to the mixture at a controlled rate to maintain the reaction temperature <70°C. The reactor temperature is maintained at 70 to about 80°C until the NCO:OH reaction is complete. The prepolymer product was degassed an...

Embodiment 2

[0114] This example is a comparative example illustrating the preparation of polyurethane using the prepolymer prepared in Example 1 and the diol chain extender, but without the monofunctional chain terminator.

[0115] An aliquot (800 g) of the diisocyanate-terminated polytrimethylene ether-urethane prepolymer prepared in Example 1 was transferred to another reactor and maintained at 60°C. To the prepolymer was added preheated 1,4-butanediol (78 g). (NCO:OH ratio 1.05:1), the mixing was continued for about 90 seconds until the diol was visually incorporated into the prepolymer. The reaction mixture was then poured into open molds and placed in an oven for post-cure at 110° C. for 16 hours.

Embodiment 3

[0117] This example illustrates the preparation of a diisocyanate-terminated polytrimethylene ether-urethane prepolymer that is used in subsequent reactions to react with chain extenders and chain terminators to prepare the inventive combination.

[0118] Polytrimethylene ether glycol (937.1 g) with a molecular weight of 2000 was dried and charged to a 2-liter four-necked flask equipped with a mechanical stirrer, dropping funnel, thermocouple, and gas inlet adapter. An antioxidant (mixture of IRGANOX 1076 and ETHANOX 300 (2.3 g)) was added to the polyol and mixed thoroughly. The mixture was then heated to 60°C under an inert nitrogen atmosphere. Molten (50°C) 4,4'-diphenylmethane diisocyanate (ISONATE 125M, 541 g) was slowly added to the mixture at a controlled rate to maintain the reaction temperature <70°C. The reactor temperature was maintained at 70 to 80°C until the NCO:OH reaction was complete. The prepolymer product was degassed and heat transferred to a clean dry pl...

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Abstract

Thermoplastic polyurethane prepared from reactants comprising: (a) polytrimethylene ether glycol; (b) diisocyanate; (c) diol chain extender; and (d) monofunctional alcohol chain terminator or monofunctional amine chain terminator; and manufacture and use thereof.

Description

technical field [0001] The present invention relates to a thermoplastic polytrimethylene ether polyurethane composition, a process for its production, a shaped article comprising the thermoplastic polytrimethylene ether polyurethane composition, a method for producing the shaped article, and the use of the shaped article. Background technique [0002] Polyurethane polymers belong to the family of thermoplastic elastomers (TPE's), generally block copolymers comprising soft and hard segment blocks. The soft segments consist primarily of polyether or polyester polyols, while the hard segments consist primarily of diisocyanates and chain extenders (the hydroxyl groups at the end of the polyether diols are believed to form part of the hard segments). Polyurethane elastomers are widely used in the production of spandex fibers, films, foams, resins, adhesives and coatings for a variety of end uses including automotive bumper coatings, solid tires, industrial rollers, shoe soles an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/48C08G18/10D01F6/70
CPCC08G18/10C08G18/4825D01F6/70C08G18/32C08G18/2815C08G18/48C08G2261/93C08J5/18C08L75/04C08L2207/04
Inventor H·B·森卡拉
Owner EI DU PONT DE NEMOURS & CO
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