Polyether type polyurethane prepolymer containing long lateral-chain organosilicon, and preparation method and application thereof

A technology of polyether polyurethane and silicone, which is applied in the field of chemistry and chemical engineering, can solve the problems of difficult control and fast reaction speed, and achieve the effects of moderate reaction speed, improved surface properties and simple synthesis steps

Active Publication Date: 2013-12-04
GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This reaction has the disadvantage that the reacti

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  • Polyether type polyurethane prepolymer containing long lateral-chain organosilicon, and preparation method and application thereof
  • Polyether type polyurethane prepolymer containing long lateral-chain organosilicon, and preparation method and application thereof
  • Polyether type polyurethane prepolymer containing long lateral-chain organosilicon, and preparation method and application thereof

Examples

Experimental program
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Embodiment 1

[0038] The preparation method of the polyether polyurethane prepolymer containing long side chain organosilicon of the present invention comprises the following steps:

[0039] (1) Preparation of long-chain single-ended hydroxyl polydimethylsiloxane

[0040] In a 500ml three-necked bottle equipped with a mechanical electric stirrer and a thermometer, add 200g α, ω-dihydroxy polydimethylsiloxane (average molecular weight 15000), 100ml toluene, mix and stir for 20 minutes, and control the reaction temperature with ice water In the range of -5°C to 5°C, a toluene solution containing 1.5 g of trimethyl-chlorosilane was added dropwise through a dropping funnel under stirring conditions. After the reaction is complete, add 1.5 g of triethylamine to neutralize the hydrogen chloride produced, wash with distilled water until the solution is neutral, then remove toluene and water by rotary evaporation at 70°C, and dry the product under vacuum at 110°C for 3 hours to remove water to obta...

Embodiment 2

[0053] The preparation method of the polyether polyurethane prepolymer containing long side chain organosilicon of the present invention comprises the following steps:

[0054] (1) Preparation of long-chain single-ended hydroxyl polydimethylsiloxane

[0055] In a 1500ml three-necked bottle equipped with a mechanical electric stirrer and a thermometer, add 800gα,ω-dihydroxypolydimethylsiloxane (average molecular weight: 50000), 400ml toluene, mix and stir for 60 minutes, and control the reaction temperature with ice water In the range of -5°C to 5°C, a toluene solution containing 1.8 g of trimethylchlorosilane was added dropwise through a dropping funnel under stirring conditions. After the reaction is complete, add 1.8 g of triethylamine to neutralize the hydrogen chloride produced, wash with distilled water until the solution is neutral, then remove toluene and water by rotary evaporation at 80°C, and vacuum dry the product at 130°C for 2 hours to remove water to obtain a lon...

Embodiment 3

[0068] The preparation method of the polyether polyurethane prepolymer containing long side chain organosilicon of the present invention comprises the following steps:

[0069] (1) Preparation of long-chain single-ended hydroxyl polydimethylsiloxane

[0070] In a 1500ml three-necked bottle equipped with a mechanical electric stirrer and a thermometer, add 800g of α, ω-dihydroxy polydimethylsiloxane (average molecular weight: 100,000), 400ml of toluene, mix and stir for 60 minutes, and control the reaction temperature with ice water In the range of -5°C to 5°C, a toluene solution containing 0.9 g of trimethylmonochlorosilane was added dropwise through a dropping funnel under stirring conditions. After the reaction is complete, add 0.9 g of triethylamine to neutralize the hydrogen chloride produced, wash with distilled water until the solution is neutral, then remove toluene and water by rotary evaporation at 50°C, and vacuum-dry the product at 100°C for 3 hours to remove water ...

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Abstract

The invention discloses a polyether type polyurethane prepolymer containing long lateral-chain organosilicon, and a preparation method and application thereof. The method comprises the following steps: as for the prepolymer, taking 100 weight parts of polyether triatomic alcohol and 10-50 weight parts of diisocyanate to react to obtain an isocyanate radical end capped polyurethane prepolymer; adding 15-1500 weight parts of long-chain single-end hydroxyl polysilicone and 0-0.5 weight parts of organometallic catalyst into the prepolymer for grafting modification reaction, thereby obtaining the polyether type polyurethane prepolymer provided by the invention. Moreover, the polyether type polyurethane prepolymer can be mixed with other polyurethane prepolymers, a polyurethane elastic body can be obtained through adding chain extendor and has greatly improved surface performance and heat resistance. The advantages that the raw materials are low in cost and easy to obtain, the synthesis procedures are simple, the reaction rate is moderate, the operation conditions are easy to control, and industrialized production is appropriate are achieved. Moreover, environment pollution is avoided, and the development direction of 'green material' is met.

Description

technical field [0001] The invention belongs to the field of chemistry and chemical engineering, and relates to the synthesis of polyurethane prepolymers, in particular to a polyether polyurethane prepolymer containing long side chain organic silicon, its preparation method and application. Background technique [0002] The full name of polyurethane (PU) is polyurethane, which is a general term for polymer materials containing repeated carbamate groups (-NHCOO-) in the main chain. It has excellent mechanical properties, excellent wear resistance and fatigue resistance. performance, flex resistance, chemical corrosion resistance, etc. However, the material is not resistant to high and low temperatures, is flammable, has poor water resistance, and has poor surface and dielectric properties, thus limiting its application in certain fields. Organosilicon is an organic polymer compound containing silicon in its molecular structure. The main chain is a stable skeleton (Si-O-Si) c...

Claims

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Application Information

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IPC IPC(8): C08G81/00C08G77/458C08G18/83C08G18/48C08G77/38C08G18/66C08G18/32
Inventor 刘伟区夏侯国论
Owner GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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