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Temperature-resistant type high-permeable waterproof and moisture-penetration thermoplastic polyurethane elastomer and preparation method thereof

A thermoplastic polyurethane, waterproof and moisture-permeable technology, applied in the field of elastomer and its preparation, can solve the problems of temperature resistance, mechanical properties and moisture permeability, high degradation difficulty, environmental pollution, etc., to achieve processing performance and waterproof and moisture permeability The effect of maintaining stability, stable preparation process, and low equipment requirements

Inactive Publication Date: 2017-08-18
SHANGHAI HENGAN POLYURETHANE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Traditional high-end waterproof and moisture-permeable films generally use polytetrafluoroethylene composite films, but the current polytetrafluoroethylene has been monopolized by foreign companies for a long time, and it is difficult to degrade. Long-term use will cause serious pollution to the environment. Thermoplastic polyurethane is an emerging Waterproof and moisture-permeable environmentally friendly materials, which have good antibacterial properties, hydrolysis resistance, low temperature resistance, abrasion resistance, aging resistance, oil resistance, high strength, etc., but films made of ordinary polyurethane materials have temperature resistance, mechanical properties Defects that performance and moisture permeability cannot be balanced

Method used

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  • Temperature-resistant type high-permeable waterproof and moisture-penetration thermoplastic polyurethane elastomer and preparation method thereof
  • Temperature-resistant type high-permeable waterproof and moisture-penetration thermoplastic polyurethane elastomer and preparation method thereof
  • Temperature-resistant type high-permeable waterproof and moisture-penetration thermoplastic polyurethane elastomer and preparation method thereof

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preparation example Construction

[0028] like figure 1 As shown, the preparation method of the temperature-resistant high-permeable waterproof and moisture-permeable thermoplastic polyurethane elastomer of the present invention comprises the following steps:

[0029] Step 1, preparing macromolecular polyols, mixing one or more of polyester polyols or polyether polyols with modified crystallizable soft segment hydrophilic polymers in a mass ratio of 1:0.1 to 1:1 , preparing raw material macromolecular polyols;

[0030] Step 2: Mix the raw materials, melt the macromolecular polyol at 80-120°C, and then vacuum dehydrate; place the diisocyanate and the small-molecule chain extender at 30-60°C and melt respectively, and weigh 30-100 parts by mass 1 part of macromolecular polyol, 5 to 50 parts of diisocyanate, 3 to 40 parts of small molecule chain extender, 0 to 20 parts of additives, control the isocyanate index to 0.95 to 1.05, hard segment content to 30% to 55%, and the raw materials pass through the flowmeter ...

Embodiment 1

[0036]The polytetrahydrofuran ether diol and the modified long-chain polyethylene glycol are uniformly mixed in a mass ratio of 1:0.1 to prepare a raw material macromolecular polyol. After melting 70 parts of macromolecular polyol at 80°C, vacuum dehydration; 30 parts of diphenylmethane diisocyanate and 18 parts of 1,4-butanediol were melted at 40°C respectively, and the raw materials were accurately metered into the twin-screw through a flow meter In the premixing unit, control the reaction time for 1 minute and the temperature at 180°C. The homogeneously mixed materials were injected into a twin-screw extruder for reactive extrusion. The reaction time was controlled to be 3 minutes, the rotational speed was 200 rpm, and the reaction temperature was 190°C. The thermoplastic polyurethane elastomer was obtained by underwater pelletizing. The obtained thermoplastic polyurethane elastomer was dried and aged in an oven at 100° C. for 8 hours to obtain the required temperature-resi...

Embodiment 2

[0038] The polyethylene adipate diol and the modified long-chain polyethylene glycol are uniformly mixed in a mass ratio of 1:0.3 to prepare a raw material macromolecular polyol. After melting 80 parts of macromolecular polyol at 90°C, vacuum dehydration; after mixing 7 parts of 1,2-propanediol and 13 parts of 1,3-propanediol, and 40 parts of toluene diisocyanate respectively at 50°C and melting, take 4 parts Hydrolysis stabilizer, the raw material is accurately metered into the twin-screw premixing unit through a flow meter, and the reaction time is controlled for 2 minutes and the temperature is 150°C. The homogeneously mixed material was injected into a twin-screw extruder for reaction extrusion, the reaction time was controlled to be 2 minutes, the rotation speed was 300 rpm, and the reaction temperature was 200°C, and thermoplastic polyurethane elastomer was obtained by underwater pelletizing. The obtained thermoplastic polyurethane elastomer was dried and matured in an o...

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Abstract

The invention discloses a temperature-resistant type high-permeable waterproof and moisture-penetration thermoplastic polyurethane elastomer. The temperature-resistant type high-permeable waterproof and moisture-penetration thermoplastic polyurethane elastomer is prepared from the following components in parts by mass: 30 to 100 parts of macromolecular polyols, 5 to 50 parts of diisocyanate, 3 to 40 parts of micromolecular chain extender, and 0 to 20 parts of additive. The prepared temperature-resistant type high-permeable waterproof and moisture-penetration thermoplastic polyurethane elastomer has the advantages that the temperature-resistant type high-permeable waterproof and moisture-penetration thermoplastic molecule structure adopts a rigid section-environment sensing area-amorphous region multiple-block structure, a non-regular group is introduced to adjust the crystallizing temperature of the environment sensing area, the high temperature-resistant property is good, the processing temperature range is widened, the processing property is good, and the mechanical property is excellent; a one-step method is adopted, the preparation technology is stable, the requirement on equipment is low, the cost is low, and the large-scale production effect is realized; the plasticizing processing is good, the moisture-penetration property is adjusted according to requirements, the degradability is realized, and the green, environment-friendly and non-pollution effects are realized; the elastomer can be widely applied to the fields of clothes, home, medical articles and the like.

Description

technical field [0001] The invention relates to an elastomer and a preparation method thereof, in particular to a temperature-resistant high-permeable waterproof and moisture-permeable thermoplastic polyurethane elastomer and a preparation method thereof. Background technique [0002] Traditional high-end waterproof and moisture-permeable films generally use polytetrafluoroethylene composite films, but the current polytetrafluoroethylene has been monopolized by foreign companies for a long time, and it is difficult to degrade. Long-term use will cause serious pollution to the environment. Thermoplastic polyurethane is an emerging Waterproof and moisture-permeable environmentally friendly materials, which have good antibacterial properties, hydrolysis resistance, low temperature resistance, abrasion resistance, aging resistance, oil resistance, high strength, etc., but films made of ordinary polyurethane materials have temperature resistance, mechanical properties The defect ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/48C08G18/42C08G18/32C08G18/76C08G18/73C08G18/66
CPCC08G18/4854C08G18/3206C08G18/4018C08G18/4238C08G18/4833C08G18/6607C08G18/6674C08G18/6677C08G18/73C08G18/7614C08G18/7671C08G2230/00
Inventor 朱勇代丽聂昌军刘宝全
Owner SHANGHAI HENGAN POLYURETHANE CO LTD
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