Thermoplastic organic silicon polyurethane elastomer and preparation method thereof

A polyurethane elastomer and silicone technology, applied in the field of thermoplastic silicone polyurethane elastomer and its preparation, thermoplastic polyurethane elastomer, can solve the problem of poor skin affinity of TPU, poor mechanical strength, tensile strength and tear strength, and dirt resistance. , Insufficient penetration resistance, etc., to achieve the effect of smooth hand feeling

Active Publication Date: 2017-06-13
MIRACLL CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, TPU is poor in skin affinity, and has insufficient dirt resistance and penetration resistance; while silicone rubber products have excellent skin affinity, light stability, dirt resistance and penetration resistance, but its mechanical strength, especially tensile strength and tear resistance poor strength

Method used

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  • Thermoplastic organic silicon polyurethane elastomer and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0030] A kind of thermoplastic silicone polyurethane elastomer, its raw material composition is as follows: the polytetrahydrofuran ether glycol (PTMG) of molecular weight 2000g / mol, 57 parts; Both ends are by the organosilicon oil of PEG capping, hydroxyl value 38mg KOH / g, 15 parts ; Diphenylmethane diisocyanate (MDI), 23 parts; 1,4-butanediol, R=nNCO / nOH=1.01 in the total system, 15 parts; Antioxidant 1010, 0.6 part; light stabilizer 622, 0.5 copies, 3280.8 parts; lubricant EBO, 0.3 parts, silicone powder 0.2 parts.

[0031] The preparation method of above-mentioned thermoplastic silicone polyurethane elastomer is as follows:

[0032] 1) Add the weighed antioxidant, light stabilizer and lubricant into polytetrahydrofuran ether glycol (PTMG), heat to 100°C and stir for 2 hours to completely dissolve the additive;

[0033] 2) After that, add the heated polytetrahydrofuran ether glycol (PTMG), 1,4-butanediol, diphenylmethane diisocyanate (MDI) at 45-50°C, and silicone oil...

Embodiment 2

[0036] A kind of thermoplastic silicone polyurethane elastomer, its raw material composition is as follows: the polytetrahydrofuran ether glycol (PTMG) of molecular weight 1800g / mol, 59 parts; Both ends are by the organosilicon oil of PEG capping, hydroxyl value 55mg KOH / g, 30 parts ; Diphenylmethane diisocyanate (MDI), 32 parts; 1,4-butanediol, R=nNCO / nOH=1.01 in the total system, 20 parts; Antioxidant 1010, 0.2 parts, 1076, 0.3 parts; light stabilizer 770, 1.0 copies, 0.5 part of P; 0.5 part of lubricant EBS, 0.5 part of oleic acid amide.

[0037] The preparation method of above-mentioned thermoplastic silicone polyurethane elastomer is as follows:

[0038] 1) Add the weighed antioxidant, light stabilizer and lubricant into polytetrahydrofuran ether glycol (PTMG), heat to 100°C and stir for 2 hours to completely dissolve the additive;

[0039] 2) After that, add the heated polytetrahydrofuran ether glycol (PTMG), 1,4-butanediol, diphenylmethane diisocyanate (MDI) at ...

Embodiment 3

[0042] A kind of thermoplastic silicone polyurethane elastomer, its raw material composition is as follows: the polyoxyethylene glycol (PEG) of molecular weight 2500g / mol, 45 parts; Both ends are by the organosilicon oil of PEG capping, and hydroxyl value is 40mg KOH / g, 30 parts ; Toluene diisocyanate (TDI), 50 parts; 1,3-propanediol, R=nNCO / nOH=1.01 in the total system, 10 parts; Antioxidant 1010, 0.2 parts, 1076, 0.2 parts, 1098, 0.2 parts; light stabilizer 770, 1.5 copies, 0.5 part of P; 0.6 part of lubricant erucamide, 0.6 part of stearic acid amide.

[0043] The preparation method of above-mentioned thermoplastic silicone polyurethane elastomer is as follows:

[0044] 1) Add the weighed antioxidant, light stabilizer, and lubricant into polyethylene oxide glycol (PEG), heat to 100°C and stir for 2 hours to completely dissolve the additive;

[0045]2) Finally, add the heated polyoxyethylene glycol (PEG), 1,3-propanediol, toluene diisocyanate (TDI) at 45-50°C, an...

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Abstract

The invention relates to a thermoplastic organic silicon polyurethane elastomer and a preparation method thereof. The elastomer comprises the following raw materials: 25-80 parts of macromolecular polyols, 0-60 parts of organic silicon oil or liquid silicone rubber, 10-50 parts of diisocyanate, 3-20 parts of chain extender micromolecule polyols and 0.1-3 parts of auxiliaries, wherein the macromolecular polyols contain silicon-free polyols with molecular weight of 1000-4000g / mol and polyols modified by copolymerizing or grafting through organic silicon; and the micromolecule polyols are micromolecule polyols with less than 10 carbons. The thermoplastic organic silicon polyurethane elastomer provided by the invention has the following excellent performance parameters: hardness Shore A40-D80, tensile strength more than or equal to 5MPa, smooth hand feel, dust resistance, liquid permeation resistance, no simulation to skin, excellent encapsulating effects for PC, ABS and TPU and 180-degree peeling strength less than or equal to 25N / 25mm.

Description

technical field [0001] The invention relates to a thermoplastic polyurethane elastomer, in particular to a thermoplastic silicone polyurethane elastomer and a preparation method thereof, belonging to the technical field of polymer materials. Background technique [0002] Thermoplastic polyurethane elastomer (hereinafter referred to as TPU) is a linear polymer material polymerized from macromolecular diols, diisocyanates and small molecular diols or diamines. TPU is a block copolymer. The soft segment is formed by the macromolecular diol, and the hard segment is formed by the reaction of the diisocyanate and the small molecule diol. The alternating molecular structure of the soft segment and the hard segment forms a microphase region and produces a microphase. Separation; in addition, due to the existence of a large number of polar groups, hydrogen bonds can be formed within and between molecules of TPU to generate physical cross-linking points, so when deformed, there will b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/65C08G18/66C08G18/32C08G18/40C08G18/42C08G18/48C08G18/61B29C47/92B29B9/06B29C48/92
CPCB29C48/92B29B9/06C08G18/3206C08G18/3212C08G18/4009C08G18/4202C08G18/4238C08G18/4277C08G18/4833C08G18/4854C08G18/61C08G18/6511C08G18/664C08G18/6674B29C2948/92704C08G18/5096C08G18/7671C08G18/7621C08G18/4692C08G18/758C08G18/4808C08G18/4018B29B9/065B29K2075/00B29K2083/00C08G18/242
Inventor 王黑龙宋红玮刘德富张生王仁鸿
Owner MIRACLL CHEM
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