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Layered silicate modified organosilicon grafted polyether polyurethane elastomer, preparation method and application

A polyurethane elastomer and layered silicate technology, applied in the field of polymer materials, can solve the problems of reduced tensile strength and toughness of silicone-modified polyurethane

Inactive Publication Date: 2016-09-14
国科广化(南雄)新材料研究院有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with pure polyurethane materials, the tensile strength and toughness of silicone-modified polyurethanes are reduced

Method used

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  • Layered silicate modified organosilicon grafted polyether polyurethane elastomer, preparation method and application
  • Layered silicate modified organosilicon grafted polyether polyurethane elastomer, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] (1) Preparation of polyether polyurethane prepolymer: In a 500mL three-neck flask equipped with a mechanical electric stirrer, a thermometer, and a nitrogen conduit, add 17.4g of toluene diisocyanate (TDI) and 100g of polyoxypropylene ether glycol N220 , stirred and reacted at 75°C for 5 hours to obtain a polyether polyurethane prepolymer.

[0064] (2) Preparation of silicone-grafted polyether polyurethane prepolymer: In a 500mL three-necked bottle equipped with a mechanical electric stirrer, a thermometer, and a nitrogen conduit, add 100g of polyoxypropylene ether triol N330, 17.4g of toluene di Isocyanate (TDI), after stirring and reacting at 80°C for 4 hours, add 6g of single-end hydroxyl polydimethylsiloxane (silanol-terminated, average molecular weight is 15000), 0.1g of organometallic catalyst dibutyltin dilaurate , the temperature was raised to 90° C., and the graft modification reaction was carried out for 4 hours to obtain a silicone-grafted polyether polyureth...

Embodiment 2

[0068] (1) Preparation of polyether polyurethane prepolymer: In a 500mL three-necked bottle equipped with a mechanical electric stirrer, a thermometer, and a nitrogen conduit, add 17g of hexamethylene diisocyanate (HDI) and 100g of polyoxypropylene ether binary Alcohol N220, stirred and reacted at 85°C for 6 hours to obtain a polyether polyurethane prepolymer.

[0069] (2) Preparation of silicone-grafted polyether type polyurethane prepolymer: In a 500mL three-neck flask equipped with a mechanical electric stirrer, a thermometer, and a nitrogen conduit, add 100g of polyoxypropylene ether triol N330 and 16.8g of HDI, After stirring and reacting at 85°C for 4 hours, add 30g of single-ended hydroxyl polydimethylsiloxane (silanol-terminated, average molecular weight of 50,000), 0.1g of dibutyltin dilaurate, raise the temperature to 95°C, and carry out connection The branch modification reaction was carried out for 5 hours, and the organosilicon grafted polyether type polyurethane ...

Embodiment 3

[0073] (1) Preparation of polyether polyurethane prepolymer: In a 500mL three-necked bottle equipped with a mechanical electric stirrer, a thermometer, and a nitrogen conduit, add 150g isophorone diisocyanate (IPDI) and 100g polypropylene glycol PPG300, at 75 Stirring and reacting at ℃ for 10 hours to obtain a polyether type polyurethane prepolymer.

[0074] (2) Preparation of silicone grafted polyether type polyurethane prepolymer: in a 500mL three-necked bottle equipped with a mechanical electric stirrer, a thermometer, and a nitrogen conduit, add 100g of polyoxypropylene ether tetrahydric alcohol (average molecular weight 5000), 18g IPDI, after stirring and reacting at 75°C for 7 hours, add 15g single-end hydroxyl polydimethylsiloxane (silanol-terminated, average molecular weight is 30000), 0.4g dibutyltin dilaurate, heat up to 95°C , carry out the grafting modification reaction for 4 hours, and obtain the organosilicon grafted polyether type polyurethane prepolymer.

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Abstract

The invention discloses a phyllosilicate modified organic silicon grafted polyether polyurethane elastomer and a preparation method and application thereof. The phyllosilicate modified organic silicon grafted polyether polyurethane elastomer comprises the following components in parts by mass: 100 parts of polyether polyurethane prepolymers, 5-100 parts of organic silicon grafted polyether polyurethane prepolymers, 1-40 parts of polyether polyol, 0.5-15 parts of organic modified phyllosilicate, 0-5 parts of chain extenders, 0.1-2 parts of defoaming agents and 2-15 parts of curing agents. The phyllosilicate modified organic silicon grafted polyether polyurethane elastomer disclosed by the invention has multiple properties, namely excellent surface property, heat resistance, mechanical property, abrasion resistance, oil resistance, solvent resistance, radiation resistance, electrical insulation and the like, through the integrated complementation of excellent properties of the phyllosilicate, organic silicon and polyurethane. The preparation method of the phyllosilicate modified organic silicon grafted polyether polyurethane elastomer, which is disclosed by the invention, has the advantages of simpleness, easiness for reaction condition control, low-cost raw materials, low energy consumption, no environment pollution and suitability for industrialized production.

Description

technical field [0001] The invention belongs to the field of macromolecular materials, and relates to a preparation method of a polyurethane elastomer, in particular to a layered silicate modified organosilicon grafted polyether type polyurethane elastomer, a preparation method and an application thereof. Background technique [0002] The main chain of polyurethane elastomer contains repeated urethane groups (-NHCOO-), which has good wear resistance, high strength, elasticity, oil resistance, solvent resistance, radiation resistance, electrical insulation, and a wide range of applications. Used in mining, metallurgy, transportation, mold lining, machinery parts, etc. However, the application of this material is greatly limited because of its low temperature resistance, large internal heat generation, flammability, poor water resistance and poor dielectric properties. [0003] The silicone structure contains Si-O bonds, and its bond energy is as high as 422.2kJ / mol. Siloxane...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/66C08G18/61C08G18/48C08G18/10C08G18/12C08K9/04C08K3/34
CPCC08G18/3206C08G18/3212C08G18/324C08G18/3243C08G18/4009C08G18/4812C08G18/4825C08G18/4829C08G18/4854C08G18/61C08K3/34C08K3/346C08K9/04
Inventor 刘伟区夏侯国论
Owner 国科广化(南雄)新材料研究院有限公司
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