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A kind of calendering grade thermoplastic polyurethane elastomer and preparation method thereof

A thermoplastic polyurethane and elastomer technology, applied in the field of polymers, can solve the problems of large loss of additives, unfavorable industrial production, and increase the difficulty of TPU calendering processing, etc., to achieve the effect of enhancing mechanical properties

Active Publication Date: 2018-09-21
DONGGUAN JIXIN POLYMER SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is to mix the required additives and TPU main ingredients in a high-speed mixer, which increases the difficulty of preparation for TPU calendering processing, and requires continuous metering of each component in the formula, which is not conducive to rapid and continuous industrial production. The amount loss is large, and because the TPU melt has strong adhesion to the metal, it will adhere to the wall of the mixer

Method used

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  • A kind of calendering grade thermoplastic polyurethane elastomer and preparation method thereof
  • A kind of calendering grade thermoplastic polyurethane elastomer and preparation method thereof
  • A kind of calendering grade thermoplastic polyurethane elastomer and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0062] (1) Preparation of nano-SiO 2 Modified Polypropylene:

[0063] Add the mixture of 100 parts of polypropylene and 15 parts of dicumyl peroxide into the twin-screw extruder, and set the temperature of the feeding section of the twin-screw extruder, the temperature of the mixing section, the temperature of the extrusion section and the temperature of the machine head to 150 ℃, 150℃, 150℃ and 135℃, etc., after it melts, add 25 parts of nano-SiO 2 Perform melt grafting reaction to obtain nano-SiO 2 Modified polypropylene.

[0064] (2) Preparation of thermoplastic polyurethane elastomer

[0065] 65 parts of polymer polyol (wherein, the number average molecular weight of polymer polyol is 1700, the mass ratio of polytetrahydrofuran diol and 1,4-butylene adipate diol is 5:1), 25 parts Add diethylene glycol and 10 parts of hydroxyethyl acrylate into the container, and dehydrate under 55°C vacuum-0.3kPa under the stirring condition of 1100r / min to obtain mixture A; The mass ...

Embodiment 2

[0068] (1) Preparation of nano-SiO 2 Modified Polypropylene:

[0069] Add the mixture of 100 parts of polypropylene and 20 parts of dicumyl peroxide into the twin-screw extruder, and set the temperature of the feeding section, the mixing section, the extrusion section and the head temperature of the twin-screw extruder to 140 ℃, 140℃, 140℃ and 130℃, etc., after it melts, add 10 parts of nano-SiO 2 Perform melt grafting reaction to obtain nano-SiO 2 Modified polypropylene.

[0070] (2) Preparation of thermoplastic polyurethane elastomer

[0071] 63 parts of polymer polyol (wherein, the number average molecular weight of polymer polyol is 1500, the mass ratio of polytetrahydrofuran diol and 1,4-butanediol adipate diol is 6:1), 23 parts Add diethylene glycol and 7 parts of hydroxyethyl acrylate into the container, and dehydrate under 50°C vacuum-0.2kPa under the stirring condition of 1200r / min to obtain mixture A; The mass ratio of base diisocyanate is 5:1) after being heate...

Embodiment 3

[0074] (1) Preparation of nano-SiO 2 Modified Polypropylene:

[0075] Add a mixture of 100 parts of polypropylene and 30 parts of dicumyl peroxide into the twin-screw extruder, and set the temperature of the feeding section, the mixing section, the extrusion section and the head temperature of the twin-screw extruder to 160 ℃, 160℃, 160℃ and 140℃, etc., after it melts, add 20 parts of nano-SiO 2 Perform melt grafting reaction to obtain nano-SiO 2 Modified polypropylene.

[0076] (2) Preparation of thermoplastic polyurethane elastomer

[0077] With 67 parts of polymeric polyol (wherein, the number average molecular weight of polymeric polyol is 2000, the mass ratio of polytetrahydrofuran diol and 1,4-butylene adipate diol is 3:1), 27 parts Add diethylene glycol and 13 parts of hydroxyethyl acrylate into the container, and dehydrate at 60°C under vacuum at 0.4kPa under the stirring condition of 1000r / min to obtain mixture A; The mass ratio of base diisocyanate is 2:1) after...

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Abstract

The invention provides a rolling level thermoplastic polyurethane elastomer and a preparation method thereof. The thermoplastic polyurethane elastomer is mainly prepared of the following components in parts by weight: polymeric glycol, isocyanate mixture, diethylene glycol, nano SiO2 modified polypropylene and hydroxyethyl acrylate, wherein the polymeric glycol is a polytetramethylene glycol and adipic acid 1,4-butyl glycol ether glycol mixture; the isocyanate mixture is a toluene diisocynate and hexamethylene diisocyanate mixture. Under the synergistic effect of polytetramethylene glycol and adipic acid 1,4-butyl glycol ether glycol and the synergistic effect of toluene diisocynate and hexamethylene diisocyanate, the prepared rolling level thermoplastic polyurethane elastomer is high in processing performance and resilience performance due to nano SiO2 modified polypropylene and hydroxyethyl acrylate serving as a crosslinking agent; meanwhile, the phenomenon of roll bonding can be avoided in a working process.

Description

technical field [0001] The invention belongs to the technical field of macromolecules, and relates to a thermoplastic polyurethane elastomer and a preparation method thereof, in particular to a calendering grade thermoplastic polyurethane elastomer and a preparation method thereof. Background technique [0002] Thermoplastic Polyurethane (TPU) is a polymer material that can be melted by heating and can be dissolved by solvents. TPU molecules are linear, there is little crosslinking between molecules, and the glass transition temperature is low, so it has high strength, high elasticity and excellent wear resistance, oil resistance and low temperature resistance. [0003] Thermoplastic polyurethane elastomers are generally prepared from polyisocyanates, macromolecular polyols and low molecular polyols. Isocyanate and low-molecular polyols form hard segments, and macromolecular polyols form soft segments. Due to the thermodynamic incompatibility between hard segments and soft ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L75/08C08L75/06C08L23/12C08K3/36C08K5/14C08G18/76C08G18/75C08G18/67C08G18/48C08G18/42C08G18/32B29C47/92B29C48/92
Inventor 何建雄王一良
Owner DONGGUAN JIXIN POLYMER SCI & TECH
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