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Extrusion grade thermoplastic polyurethane elastomer and manufacturing method thereof

A thermoplastic polyurethane and elastomer technology, applied in the field of polyurethane, can solve the problems of the narrow range of thermoplastic polyurethane hardness and the inability to meet the demand, and achieve the effect of good extrusion flow performance and good mechanical properties

Inactive Publication Date: 2015-10-28
DONGGUAN JIXIN POLYMER SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the thermoplastic polyurethane prepared by it has a narrow range of hardness, which cannot meet the needs of the material in the existing industry; at the same time, its mechanical properties need to be further improved

Method used

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  • Extrusion grade thermoplastic polyurethane elastomer and manufacturing method thereof
  • Extrusion grade thermoplastic polyurethane elastomer and manufacturing method thereof
  • Extrusion grade thermoplastic polyurethane elastomer and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] (1) Weigh 37 parts of polyoxytetramethylene glycol into the reactor, control the stirring rate at 1300r / min, vacuum dehydrate at 90°C for 2h, then add 0.3 part of the catalyst stannous octoate to it, and ultrasonically treat it for 45min. It is mixed evenly to form a mixture A;

[0045] (2) Weigh 60 parts of isocyanate mixture (wherein, the mass ratio of toluene diisocyanate and 1,6-hexamethylene diisocyanate in the isocyanate mixture is 1.5:1; and R is 1.04) and 6 parts of chain extender (wherein, two The molar ratio of phenylsilanediol and ethylene glycol is 4:1), add water to melt at 60°C, add to mixture A, stir at 100°C for 50min, then add 7 parts of silicone modified acrylic resin at 100°C After stirring for 15 minutes, add it into a twin-screw extruder to extrude and granulate to obtain product B;

[0046] Wherein, the temperature of the feeding section of the twin-screw extruder is set at 135°C, the temperature of the mixing section is set at 165°C, and the temp...

Embodiment 2

[0050] (1) Weigh 40 parts of polyepoxide propylene glycol into the reactor, control the stirring rate to 1000r / min, vacuum dehydrate at 80°C for 3h, then add 0.2 part of the catalyst dibutyltin dilaurate to it, and ultrasonically treat it for 60min Mix it evenly to form a mixture A;

[0051] (2) Weigh 65 parts of isocyanate mixture (wherein, the mass ratio of toluene diisocyanate and 1,6-hexamethylene diisocyanate in the isocyanate mixture is 1:1; and R is 1.02) and 8.125 parts of chain extender (wherein, two The molar ratio of phenylsilanediol and ethylene glycol is 3:1) add water to melt at 50°C, add to mixture A, stir at 90°C for 60min, then add 8 parts of silicone modified acrylic resin at 90°C After stirring for 30 minutes, add it into a twin-screw extruder to extrude and granulate to obtain product B;

[0052] Wherein, the temperature of the feeding section of the twin-screw extruder is set at 130°C, the temperature of the mixing section is set at 160°C, and the tempera...

Embodiment 3

[0056] (1) Weigh 35 parts of polyepoxide propylene glycol into the reactor, control the stirring rate at 1500r / min, vacuum dehydrate at 100°C for 1h, and then add the catalyst bis(dodecylsulfide)dibutyltin 0.4 part, ultrasonically treated for 30 minutes to make it evenly mixed to form mixture A;

[0057] (2) Weigh 55 parts of isocyanate mixture (wherein, the mass ratio of toluene diisocyanate and 1,6-hexamethylene diisocyanate in the isocyanate mixture is 2:1; and R is 1.1) and 5.5 parts of chain extender (wherein, two The molar ratio of phenylsilanediol and ethylene glycol is 7:1), add water to melt at 70°C, add to mixture A, stir at 110°C for 30min, then add 6 parts of silicone modified acrylic resin at 110°C After stirring for 10 minutes, add it into a twin-screw extruder to extrude and granulate to obtain product B;

[0058] Wherein, the temperature of the feeding section of the twin-screw extruder is set at 140°C, the temperature of the mixing section is set at 170°C, an...

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Abstract

The invention provides an extrusion grade thermoplastic polyurethane elastomer and a manufacturing method thereof. The extrusion grade thermoplastic polyurethane elastomer is manufactured from, by weight, 30-45 parts of polyether diol, 50-70 parts of isocyanate mixtures, 5-8.75 parts of chain extender, 5-10 parts of silicone-modified acrylic resin and 0.1-0.5 part of catalyst. The manufacturing method includes the steps that the polyether diol and the catalyst are mixed to form a mixed material A; the isocyanate mixtures and the chain extender are fused and then mixed with the mixed material A, and the formed mixture is granulated through a double-screw extruder and then cured to manufacture the extrusion grade thermoplastic polyurethane elastomer. The manufactured thermoplastic polyurethane elastomer has high mechanical properties, the tensile strength can reach over 52 MPa, the elongation can reach over 775%, the hardness range can be 60-86A, and therefore the manufactured thermoplastic polyurethane elastomer meets the industrial requirement.

Description

technical field [0001] The invention belongs to the technical field of polyurethane and relates to a polyurethane elastomer and a preparation method thereof, in particular to an extrusion-grade thermoplastic polyurethane elastomer with a wide hardness range 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] There are two types of polyurethane thermoplastic 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 feature...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/08C08L33/00C08G18/76C08G18/73C08G18/66C08G18/48C08G18/32
Inventor 何建雄王一良
Owner DONGGUAN JIXIN POLYMER SCI & TECH
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