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Transparent blocking thermoplastic polyurethane elastomer and preparation method thereof

A thermoplastic polyurethane and elastomer technology, applied in the field of polymers, can solve the problems of application limitations, gas barrier properties reduction, etc., and achieve the effects of improved transparency, improved barrier properties, high tensile strength and elongation at break

Active Publication Date: 2014-12-24
DONGGUAN JIXIN POLYMER SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The absence of silane coupling agents will result in a reduction in gas barrier properties even in the presence of multivalent metal cations as a second coating
[0007] Thermoplastic polyurethane elastomers generally have good transparency. However, since the optical transparency of conventional TPU is inversely proportional to the molding efficiency, and usually interacts with barrier properties, it is used in many large transparent injection molded parts. subject to certain restrictions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Prepare raw materials according to the following weight percentages:

[0041] 45% thermoplastic polyurethane, 25% K glue, 5% inorganic filler and 25% barrier agent;

[0042] Wherein said thermoplastic polyurethane is prepared by reacting polyol, polyisocyanate and chain extender, said polyol is polyadipate-1,4-butylene glycol ester diol; said polyisocyanate is benzhydryl Alkane isocyanate; the chain extender is 15% aliphatic diamine, 40% 1,4-cyclohexanedimethanol and 45% 1,4-cyclohexanedimethanol; the K glue is the SL- 803G; The inorganic filler is montmorillonite;

[0043] The barrier agent is maleic anhydride modified polypropylene copolymer, terephthalic acid, ethylene glycol and barrier comonomer; the maleic anhydride modified polypropylene copolymer accounts for 35% of the total amount of barrier agent, other The component is 65%; the melt index of the maleic anhydride modified polypropylene copolymer is 2.5g / 10min, and the density is 0.89g / cm 3 ; The barrie...

Embodiment 2

[0060] 40% thermoplastic polyurethane, 30% K glue, 5% inorganic filler and 25% barrier agent;

[0061] Wherein said thermoplastic polyurethane is prepared by the reaction of polyol, polyisocyanate and chain extender, and said polyol is polyadipate-1,4-butylene glycol ester diol; said polyisocyanate is benzhydryl Alkane isocyanate; the chain extender is 15% aliphatic diamine, 40% 1,4-cyclohexanedimethanol and 45% 1,4-cyclohexanedimethanol; the K glue is Chevron’s KR -05; the inorganic filler is silicon dioxide;

[0062] The barrier agent is maleic anhydride modified polypropylene copolymer, terephthalic acid, ethylene glycol and barrier comonomer; the maleic anhydride modified polypropylene copolymer accounts for 30% of the total amount of barrier agent, other The component is 70%; the melt index of the maleic anhydride modified polypropylene copolymer is 2.5g / 10min, and the density is 0.89g / cm 3 ; The barrier monomer is glycerol.

[0063] (2) Add 415.0g (2.50mol) terephthal...

Embodiment 3

[0066] 60% thermoplastic polyurethane, 20% K glue, 5% inorganic filler and 15% barrier agent;

[0067] Wherein said thermoplastic polyurethane is prepared by the reaction of polyol, polyisocyanate and chain extender, and said polyol is polyadipate-1,4-butylene glycol ester diol; said polyisocyanate is benzhydryl Alkane isocyanate; the chain extender is 15% aliphatic diamine, 40% 1,4-cyclohexanedimethanol and 45% 1,4-cyclohexanedimethanol; the K glue is Chevron’s KR -03; The inorganic filler is talcum powder;

[0068] The barrier agent is maleic anhydride modified polypropylene copolymer, terephthalic acid, ethylene glycol and barrier comonomer; the maleic anhydride modified polypropylene copolymer accounts for 30% of the total amount of barrier agent, other The component is 70%; the melt index of the maleic anhydride modified polypropylene copolymer is 2.5g / 10min, and the density is 0.89g / cm 3 ; The barrier monomer is 1,2,6-hexanetriol;

[0069] (2) Add 415.0g (2.50mol) of ...

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Abstract

The invention relates to a transparent blocking thermoplastic polyurethane elastomer and a preparation method thereof. The thermoplastic polyurethane elastomer comprises components in percentage by weight as follows: 40-70% of thermoplastic polyurethane, 20-30% of K-resin, 5-8% of inorganic filler and 12-25% of a blocking agent. All the components are mixed in a high-speed mixer firstly and then sent into a double-strew extruder to be extruded and granulated to obtain the thermoplastic polyurethane elastomer. The prepared thermoplastic polyurethane elastomer is high in transparency and good in blocking property, tensile strength and processability.

Description

technical field [0001] The invention relates to the technical field of polymers, in particular to a polyurethane elastomer and a preparation method thereof, in particular to a transparent barrier thermoplastic polyurethane elastomer and a preparation method thereof. Background technique [0002] Synthetic plastic materials have long been used in the packaging of food and other materials that require protection from handling and moisture. In recent years, however, it has been recognized that many food and other sensitive materials also benefit from protection from atmospheric oxygen and other gases. Barrier films and packaging materials intended to reduce or inhibit the permeation of gases, vapors, fragrances, etc. have been extensively described. [0003] Polyurethane, a common synthetic plastic material, has been widely used in barrier applications. Several companies, such as PPG, Mitsubishi and Mitsui, etc. have reported the development of barrier polyurethanes. However...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/06C08L67/02C08K3/34C08K3/36C08K7/18C08G63/20
Inventor 王一良何健雄
Owner DONGGUAN JIXIN POLYMER SCI & TECH
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