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Thermoplastic polyurethane elastomer nanocomposite and preparation method thereof

A technology of thermoplastic polyurethane and nanocomposite materials, which is applied in the field of modified polyurethane composite materials, can solve the problems of TPUE elongation at break decrease, etc., and achieve the effects of improving wear resistance, increasing strength, and maintaining elongation at break

Pending Publication Date: 2022-04-19
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the physical addition of simple inorganic nanomaterials often leads to a decrease in the elongation at break of TPUE. How to ensure that the toughness of TPUE is not affected on the premise of improving the strength, modulus, heat resistance and wear resistance of TPUE has become A technical problem to be solved in the research field of TPUE nanocomposite materials

Method used

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  • Thermoplastic polyurethane elastomer nanocomposite and preparation method thereof
  • Thermoplastic polyurethane elastomer nanocomposite and preparation method thereof
  • Thermoplastic polyurethane elastomer nanocomposite and preparation method thereof

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preparation example Construction

[0035] Simultaneously the application provides a kind of preparation method of thermoplastic polyurethane elastomer nanocomposite material, is used for preparing above-mentioned thermoplastic polyurethane elastomer nanocomposite material, mainly comprises the following several steps:

[0036] Step 1. Add reactive nano-silica to polyether polyol or polyester polyol, and perform ultrasonic dispersion;

[0037] Step 2, heating the dispersion liquid of nano-silica and polyether polyol or polyester polyol, and then adding diisocyanate into the dispersion liquid, mechanically stirring for 10-60 minutes in a nitrogen atmosphere; adding a chain extender, Keep the reaction temperature and mechanically stir for 5-10 minutes;

[0038] Step 3. Finally, the mixed system is poured into a polytetrafluoroethylene mold and solidified in an oven to obtain a thermoplastic polyurethane elastomer nanocomposite material.

[0039] The mass ratio of the amino nano-silica added in the above step 1 to t...

Embodiment 1

[0053] Step 1. Mix 1.3 grams of amino nano-silica SN-NH 2 Add in 200 grams of polytetramethylene ether glycol PTMG (number-average molecular weight 2000), and pre-disperse in PTMG for 20 minutes with a Vibra-Cell ultrasonic processor (VC750) with a 13mm standard probe and an amplitude of 250W ;

[0054] Step 2. Heat up the dispersion of amino nano-silica and PTMG to 80°C, then add 50 grams of MDI to the dispersion, and stir mechanically for 15 minutes in a nitrogen atmosphere; then add 9 grams of chain extender BOD to the system , mechanically stirred at 80°C for 5 minutes;

[0055] Step 3. Pour the mixed solution into a polytetrafluoroethylene mold and cure it in an oven at 80°C for 24 hours to obtain a thermoplastic polyurethane elastomer nanocomposite (TPUE / SN-NH 2 -0.5wt%), wherein the molar ratio MDI:PTMG:BOD=2:1:1, NCO:OH=1:1.

Embodiment 2

[0065] Step 1. First mix 2.6 grams of amino nano-silica SN-NH 2 Add in 200 grams of polytetramethylene ether glycol PTMG (number-average molecular weight 2000), under high-power ultrasound with the Vibra-Cell processor (VC750) that is equipped with a 13mm standard probe and an amplitude of 250W in PTMG. Disperse for 20 minutes;

[0066] Step 2. the dispersion liquid of amino nano silicon dioxide and PTMG is warmed up to 80 ℃, then 50 grams of dimethyl biphenyl diisocyanate (TODI) is joined in the dispersion liquid, mechanically stirred in nitrogen atmosphere 15 minutes; Then in Add 9 grams of chain extender 1,4-butanediol to the system, and mechanically stir at 80°C for 5 minutes;

[0067] Step 3. Finally, pour the mixed solution into a polytetrafluoroethylene mold, and cure it in an oven at 80°C for 24 hours to obtain a thermoplastic polyurethane elastomer nanocomposite (TPUE / SN-NH 2 -1.0wt%), wherein the molar ratio TODI:PTMG:1,4-butanediol=2:1:1, NCO:OH=1:1.

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Abstract

The invention relates to a thermoplastic polyurethane elastomer nanocomposite and a preparation method thereof, belongs to the field of modified polyurethane composites, and solves the problem that the toughness of TPUE cannot be maintained while the strength and wear resistance of TPUE are improved in the prior art. The thermoplastic polyurethane elastomer nano composite material disclosed by the invention is prepared from the following raw materials: reactive nano silicon dioxide introduced in a polymerization process of a thermoplastic polyurethane elastomer, and the reactive nano silicon dioxide is amino nano silicon dioxide nano particles of which the surfaces contain active amino functional groups with reaction capacity. The material is a universal high polymer material and can be widely applied to the fields of shoe materials, cables, automobiles, pipes and films.

Description

technical field [0001] The invention relates to the field of modified polyurethane composite materials, in particular to a thermoplastic polyurethane elastomer nano composite material and a preparation method. Background technique [0002] Thermoplastic polyurethane elastomer (TPUE) is a general-purpose polymer material widely used in shoe materials, cables, clothing, automobiles, medical and health care, pipes, films and sheets and other fields. TPUE is a block linear polymer consisting of flexible soft segments and rigid hard segments. The soft soft segment is composed of high molecular weight (1000-6000) polyester or polyether and diisocyanate, while the rigid hard segment is composed of diol and diisocyanate with 2-12 straight chain carbon atoms. Among them, the hard segment content directly affects the hydrogen bond, the degree of microphase separation and the crystallization performance, and is the main factor determining the performance of TPUE. Generally speaking, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/42C08G18/38C08G18/12C08G18/32
CPCC08G18/4854C08G18/42C08G18/3895C08G18/6666C08G18/6633C08G18/12C08G18/3206
Inventor 阳明书李金娜·哈比布利纳王峰高冲刘鹏
Owner INST OF CHEM CHINESE ACAD OF SCI
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