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Thermoplastic polyurethane elastomer with high barrier property and preparation method thereof

A thermoplastic polyurethane and elastomer technology, applied in the field of barrier thermoplastic polyurethane elastomer and its preparation, high barrier performance thermoplastic polyurethane elastomer and its preparation, can solve the problem that the barrier performance is not enough to meet the barrier performance, etc., to reduce the free volume, Effect of prolonged time and high barrier performance

Inactive Publication Date: 2017-09-01
DONGGUAN JIXIN POLYMER SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, part of the barrier performance of the laminated film comes from the base film, and its barrier performance is still not enough to meet the needs of some occasions that require high barrier performance

Method used

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  • Thermoplastic polyurethane elastomer with high barrier property and preparation method thereof
  • Thermoplastic polyurethane elastomer with high barrier property and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] A barrier thermoplastic polyurethane elastomer, its raw material includes the following components in parts by mass:

[0056] 50 parts of diisocyanate (35 parts of 1,3-XDI and 15 parts of 1,3-H6XDI), 50 parts of oligomer polyol (25 parts of PEC and 25 parts of EVOH), 15 parts of chain extender (0.75 parts of isophthalic Methylamine, 1.5 parts of trimethylolpropane and 12.75 parts of 1,4-butanediol), 2 parts of layered silicate (montmorillonite), 0.5 parts of silane coupling agent (KH540) and catalyst (dilauric acid Dibutyltin) 0.1 part;

[0057] The number average molecular weight of PEC is 800, and the hydroxyl value is 50 mgKOH / g; the number average molecular weight of EVOH is 1000, and the molar percentage of vinyl alcohol units is 50 mol%.

[0058] The preparation method of above-mentioned barrier thermoplastic polyurethane elastomer comprises the steps:

[0059] (1) carry out drying treatment to diisocyanate, polyether polyol and chain extender;

[0060] (2) Add...

Embodiment 2

[0063] A barrier thermoplastic polyurethane elastomer, its raw material includes the following components in parts by mass:

[0064] 20 parts of diisocyanate (17 parts of 1,3-XDI and 3 parts of 1,3-H6XDI), 80 parts of oligomer polyol (15 parts of PPC and 65 parts of EVOH), 5 parts of chain extender (0.25 parts of Methylamine, 1 part of trimethylolpropane and 3.75 parts of 1,3-propanediol), 8 parts of layered silicate (kaolin), 2 parts of silane coupling agent (IPTS) and 1 part of catalyst (stannous octoate);

[0065] The number average molecular weight of PEC is 3000, and the hydroxyl value is 20 mgKOH / g; the number average molecular weight of EVOH is 800, and the molar percentage of vinyl alcohol units is 30 mol%.

[0066] The preparation method of above-mentioned barrier thermoplastic polyurethane elastomer comprises the steps:

[0067] (1) carry out drying treatment to diisocyanate, polyether polyol and chain extender;

[0068] (2) Add the dry formulation amount of diisoc...

Embodiment 3

[0071] A barrier thermoplastic polyurethane elastomer, its raw material includes the following components in parts by mass:

[0072] 30 parts of diisocyanate (24 parts of 1,3-XDI and 6 parts of 1,3-H6XDI), 70 parts of oligomer polyol (14 parts of PEC and 56 parts of EVOH), 10 parts of chain extender (0.1 Methylamine, 1.5 parts of trimethylolpropane and 8.4 parts of 1,6-hexanediol), 5 parts of layered silicate (mica), 1 part of silane coupling agent (KH560) and catalyst (dibutyltin dilaurate )0.5 copies;

[0073] The number average molecular weight of PEC is 2000, and the hydroxyl value is 40 mgKOH / g; the number average molecular weight of EVOH is 3000, and the molar percentage of vinyl alcohol units is 40 mol%.

[0074] The preparation method of above-mentioned barrier thermoplastic polyurethane elastomer comprises the steps:

[0075] (1) carry out drying treatment to diisocyanate, polyether polyol and chain extender;

[0076] (2) Add the dry formula amount of diisocyanate,...

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Abstract

The invention provides a thermoplastic polyurethane elastomer with a high barrier property and a preparation method thereof. The thermoplastic polyurethane elastomer is prepared from the following raw materials in parts by mass: 20 to 50 parts of diisocyanate, 50 to 80 parts of oligomer polylol, 5 to 15 parts of a chain extender, 2 to 8 parts of laminar silicate, 0.5 to 2 parts of a silane coupling agent and 0.1 to 1 part of a catalyst, wherein the oligomer polylol is prepared from polycarbonate polyol and a vinyl alcohol oligomer according to the mass ratio of 1 to (1 to 5). The thermoplastic polyurethane elastomer is prepared through a method of pre-polymerizing and then carrying out chain extension. The thermoplastic polyurethane elastomer provided by the invention has good mechanical properties and has relatively high barrier property on oxygen and steam.

Description

technical field [0001] The invention belongs to the technical field of thermoplastic polyurethane elastomers, in particular relates to a barrier thermoplastic polyurethane elastomer and a preparation method thereof, in particular to a thermoplastic polyurethane elastomer with high barrier performance and a preparation method thereof. Background technique [0002] Polymers have a certain permeability to water vapor, gas and some small molecular substances, and the gas permeability of polymers has been one of the research hotspots in recent decades. Polymer films with high gas permeability can be used to separate and enrich oxygen in the air, while polymer films with low gas permeability can be used in the barrier field. Compared with metal and glass barrier materials, barrier polymer films have the characteristics of light weight, easy processing and molding, and are not fragile. They have become more and more important in industrial applications such as food packaging and ph...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/44C08G18/62C08G18/32C08G18/12C08K3/34
CPCC08G18/44C08G18/12C08G18/4063C08G18/6212C08K3/34C08G18/324C08G18/3206
Inventor 何建雄杨博王一良
Owner DONGGUAN JIXIN POLYMER SCI & TECH
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