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Polysiloxane polyether polyurethane elastomer with high mechanical property and preparation method of elastomer

A technology of polysiloxane polyether and polyurethane elastomer, which is applied in the field of silicone modified polyurethane synthesis, can solve the problems of poor compatibility, poor mechanical properties, and unsatisfactory performance of synthetic materials, etc., and achieve high tensile strength and elongation at break, the effect of excellent mechanical properties

Active Publication Date: 2019-04-05
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] To sum up, among silicone-modified polyurethane materials, due to the large difference in solubility parameters between silicone materials and polyurethane materials, the compatibility between the two is poor, resulting in unsatisfactory properties and poor mechanical properties of the prepared synthetic materials.

Method used

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  • Polysiloxane polyether polyurethane elastomer with high mechanical property and preparation method of elastomer
  • Polysiloxane polyether polyurethane elastomer with high mechanical property and preparation method of elastomer
  • Polysiloxane polyether polyurethane elastomer with high mechanical property and preparation method of elastomer

Examples

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Effect test

Embodiment 1

[0052] A preparation method of a polysiloxane polyether polyurethane elastomer with high mechanical properties, comprising the steps of:

[0053] In a round-bottom four-neck flask equipped with magnetic stirring, an inert gas feeding device, a thermometer and a constant pressure dropping funnel, add 0.76 g of diphenylmethane diisocyanate, and when the temperature rises to 60 ° C, under argon protection , under strong stirring (stirring rate is 300r / min), 5.04g number average molecular weight is 2000 the polysiloxane of hydroxypropyl end-capping through dropping funnel drop by drop (dropping speed rate is 3~5 drops / second ) into the above solution, after the dropwise addition, react at 85° C. for 4 h until the NCO content is stable, and prepare the isocyanate-terminated prepolymer A.

[0054] At the same time, in another round-bottomed four-neck flask equipped with magnetic stirring, inert gas feeding device, thermometer and constant pressure dropping funnel, add 6.79g of diphe...

Embodiment 2

[0058] A preparation method of a polysiloxane polyether polyurethane elastomer with high mechanical properties, comprising the steps of:

[0059] In a round-bottomed four-neck flask equipped with magnetic stirring, an inert gas feeding device, a thermometer and a constant pressure dropping funnel, add 1.39 g of diphenylmethane diisocyanate, and when the temperature rises to 60 ° C, under argon protection , under strong stirring (stirring rate is 300r / min), 8.02g number average molecular weight is 2000 the polysiloxane of hydroxypropyl end-capping through dropping funnel drop by drop (dropping speed rate is 3~5 drops / second ) into the above solution, after the dropwise addition, react at 85° C. for 4 h until the NCO content is stable, and prepare the isocyanate-terminated prepolymer A.

[0060] At the same time, in another round-bottomed four-neck flask equipped with magnetic stirring, inert gas feeding device, thermometer and constant pressure dropping funnel, add 5.52 g of di...

Embodiment 3

[0063] A preparation method of a polysiloxane polyether polyurethane elastomer with high mechanical properties, comprising the steps of:

[0064] In a round-bottomed four-neck flask equipped with magnetic stirring, an inert gas feeding device, a thermometer and a constant pressure dropping funnel, add 1.97 g of diphenylmethane diisocyanate, and when the temperature rises to 60 ° C, under the protection of argon, 1. Under strong stirring (stirring rate is 300r / min), 10.35g number-average molecular weight is 2000 hydroxypropyl end-capped polysiloxane drop by drop through dropping funnel (dropping rate is 3~5 drops / second ) into the above solution, after the dropwise addition, react at 85° C. for 4 h until the NCO content is stable, and prepare the isocyanate-terminated prepolymer A.

[0065] At the same time, in another round-bottomed four-neck flask equipped with magnetic stirring, an inert gas feeding device, a thermometer and a constant pressure dropping funnel, add 4.56 g of...

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Abstract

The invention provides a polysiloxane polyether polyurethane elastomer with a high mechanical property and a preparation method of the elastomer. Diphenylmethane diisocyanate, hydroxypropyl-terminatedpolysiloxane, diphenylmethane diisocyanate and polytetramethylene glycol serve as raw materials and are synthesized into two prepolymers, and then the two prepolymers are mixed and copolymerized by chain extension to prepare the polysiloxane polyether polyurethane elastomer with a specific molecular structure. The prepared polysiloxane polyether polyurethane elastomer with the specific molecularstructure has the excellent mechanical property, the tensile strength of the elastomer can reach 38Mpa, and the breaking elongation of the elastomer can reach 600% or more.

Description

technical field [0001] The invention relates to a polysiloxane polyether polyurethane elastomer with high mechanical properties and a preparation method thereof, which belongs to the technical field of organosilicon-modified polyurethane synthesis. Background technique [0002] Silicone elastomer is an important new polymer material, which has many unique and excellent properties, such as high and low temperature resistance, weather resistance, radiation resistance, ozone resistance, electrical insulation, water repellency, flame retardant, high air permeability, Physiological inertia, etc., have been widely used in aerospace, electrical and electronic, light industry, machinery, construction, chemical industry, medicine, daily necessities, etc. However, due to the low mechanical properties of silicone elastomers, such as room temperature vulcanized silicone rubber and high temperature vulcanized silicone rubber, the further expansion of its application fields is greatly res...

Claims

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Application Information

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IPC IPC(8): C08G18/76C08G18/61C08G18/48C08G18/66C08G18/65C08G18/32C08G18/38
CPCC08G18/4854C08G18/61C08G18/6511C08G18/6674C08G18/6685C08G18/7671
Inventor 冯圣玉程阳张洁许骁智竺叶澍
Owner SHANDONG UNIV
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