High-transparency polyurethane elastomer and preparation method thereof

A polyurethane elastomer and transparent technology, applied in the field of polymers, can solve the problems of transparency, high transparency and durability, unsatisfactory thermal stability, and the inability of polyurethane elastomers to have both transparency and good mechanical properties, optical transparency and barrier properties. and other problems to achieve the effect of overcoming the reduction of material uniformity

Active Publication Date: 2015-12-23
DONGGUAN JIXIN POLYMER SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the problems that the polyurethane elastomers in the above-mentioned prior art cannot have both transparency and good mechanical properties, optical transparency and barrier pr

Method used

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  • High-transparency polyurethane elastomer and preparation method thereof
  • High-transparency polyurethane elastomer and preparation method thereof
  • High-transparency polyurethane elastomer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] (1) Preparation of maleic anhydride grafted polypropylene:

[0064] The mixture of 100 parts of polypropylene and 6 parts of maleic anhydride is added in the twin-screw extruder by weight, and the feeding section temperature, the mixing section temperature, the extrusion section temperature and the die temperature of the twin-screw extruder are set to be respectively 150°C, 150°C, 150°C and 135°C, after it melts, add a mixed solution of 13 parts of styrene and 0.7 parts of tert-butyl peroxylaurate for melt grafting reaction to obtain maleic anhydride grafted polypropylene .

[0065] (2) Prepare polyurethane elastomer:

[0066] With 58 parts of polyether glycol mixture (wherein, the mass ratio of polytetrahydrofuran ether glycol, polyoxytetramethylene glycol and polyepoxypropylene glycol is 3:2:1) and 7.5 parts of chain extender ( Among them, the mass ratio of 1,4-butanediol and diethylene glycol (4:1) was added to the container, and the mixture was dehydrated at 55°C ...

Embodiment 2

[0071] (1) Preparation of maleic anhydride grafted polypropylene:

[0072] The mixture of 100 parts of polypropylene and 8 parts of maleic anhydride is added in the twin-screw extruder by parts by weight, and the feeding section temperature of the twin-screw extruder, the mixing section temperature, the extrusion section temperature and the machine head temperature are respectively set as 140°C, 140°C, 140°C and 130°C, after it melts, add a mixed solution of 15 parts of styrene and 1 part of tert-butyl peroxylaurate for melt grafting reaction to obtain maleic anhydride grafted polypropylene .

[0073] (2) Prepare polyurethane elastomer:

[0074] With 55 parts of polyether glycol mixtures (wherein, the mass ratio of polytetrahydrofuran ether glycol, polyoxytetramethylene glycol and polyepoxypropylene glycol is 2.5:2.5:1) and 7 parts of chain extender ( Among them, the mass ratio of 1,4-butanediol and diethylene glycol is 5:1) into the container, and the mixture is dehydrated ...

Embodiment 3

[0079] (1) Preparation of maleic anhydride grafted polypropylene:

[0080] The mixture of 100 parts of polypropylene and 4 parts of maleic anhydride is added in the twin-screw extruder by parts by weight, and the feeding section temperature, the mixing section temperature, the extrusion section temperature and the machine head temperature of the twin-screw extruder are set to be respectively 160°C, 160°C, 160°C and 140°C, after it melts, add a mixed solution of 10 parts of styrene and 0.5 parts of tert-butyl peroxylaurate for melt grafting reaction to obtain maleic anhydride grafted polypropylene .

[0081] (2) Prepare polyurethane elastomer:

[0082] With 65 parts of polyether glycol mixtures (wherein, the mass ratio of polytetrahydrofuran ether glycol, polyoxytetramethylene glycol and polyepoxypropylene glycol is 2:2:1) and 8 parts of chain extenders ( Among them, the mass ratio of 1,4-butanediol and diethylene glycol (3:1) was added to the container, and the mixture was d...

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Abstract

The invention provides high-transparency polyurethane elastomer and a preparation method thereof. The high-transparency polyurethane elastomer is mainly prepared by adopting the following components: a polyether glycol mixture, an aliphatic isocyanate mixture, a chain extender and maleic anhydride grafted polypropylene; the polyether glycol mixture is a mixture of polytetramethylene ether glycol, polyoxytetramethylene glycol and polypropylene epoxy glycol; the aliphatic isocyanate mixture is a mixture of hexamethylene diisocyanate and isophorone diisocyanate; the chain extender is a mixture of 1,4-isophorone diisocyanate and diethylene glycol. By adjusting the dosage ratio of all components, by utilizing the synergism of HDI and IPDI, the transparency and transparent duration of the polyurethane elastomer are improved; the mixture of the 1,4-isophorone diisocyanate and diethylene glycol is used as the chain extender, so that the crystallization of a hard section of the polyurethane elastomer is inhibited, a plurality of small sections are formed, the specific surface area is increased, the deformation of a soft-section base material is effectively inhibited, and the mechanical performance is improved.

Description

technical field [0001] The invention belongs to the technical field of polymers, and relates to a polyurethane elastomer and a preparation method thereof, in particular to a highly transparent polyurethane elastomer and a preparation method thereof. Background technique [0002] Polyurethane is a polymer material that can be melted by heating and can be dissolved by solvents. Its molecules are linear, there is little cross-linking 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] There are two types of polyurethane elastomers: polyester type and polyether type. The white irregular spherical or columnar particles have a relative density of 1.10 to 1.25. The relative density of the polyether type is smaller than that of the polyester type. The outstanding features of polyurethane elastomers are excellent wear resistance, excellent ozone...

Claims

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Application Information

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IPC IPC(8): C08G18/73C08G18/75C08G18/66C08G18/48C08G18/32C08L75/08C08F255/02C08F212/08C08F222/08B29C47/92B29C48/92
CPCB29C48/92B29C2948/9258B29C2948/92704C08F255/02C08G18/3206C08G18/4808C08G18/4825C08G18/4854C08G18/6674C08G18/73C08G18/755C08L75/08C08L2201/10C08L51/06C08F212/08
Inventor 何建雄王一良
Owner DONGGUAN JIXIN POLYMER SCI & TECH
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