Silicon-containing polyurethane oligomer and preparation method thereof

A technology of polyurethane oligomer and silicone oil, applied in the field of silicon-containing polyurethane oligomer and its preparation, can solve problems such as poor weather resistance, and achieve the effects of improving heat resistance, expanding application scope and overcoming poor weather resistance

Inactive Publication Date: 2017-05-31
GUANGZHOU SILOK POLYMER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Silicone is introduced into polyurethane, so that the modified material has both the excellent performance of silicone and polyurethane, which overcomes the disadvantage of poor weather resistance of polyurethane, and also makes up for the defect of poor mechanical properties of organosiloxane, which can improve the performance of modification. Heat-resistant, cold-resistant, hydrophobic, wear-resistant properties of materials, etc., expand the application range of modified materials, and can be applied in adhesives, coatings, synthetic leather, epoxy resin toughening, powder coatings, fabric coatings, etc.

Method used

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  • Silicon-containing polyurethane oligomer and preparation method thereof
  • Silicon-containing polyurethane oligomer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Step 1) 20 g of hydroxyl-terminated silicone oil and 350 g of polyoxypropylene glycol (molecular weight: 1000) are respectively subjected to water removal treatment;

[0021] Step 2) In the reaction kettle, add 20 g of hydroxyl-terminated silicone oil and 350 g of polyoxypropylene glycol (molecular weight: 1000) after the water removal treatment, and stir for 0.5 hours at room temperature;

[0022] Step 3) At 80°C, with a stirring rate of 90r / min, add 140g of isophorone diisocyanate and 1g of dibutyltin dilaurate into the flask, and react for 2-4 hours;

[0023] Step 4) After reacting for 2 hours, continuously measure the NCO content during the reaction process, and when the NCO content is close to the theoretical value, the silicon-containing polyurethane oligomer is obtained.

example 2

[0025] Step 1) 40g of hydroxyl-terminated silicone oil and 400g of polyoxypropylene glycol (molecular weight: 1000) are respectively subjected to water removal treatment;

[0026] Step 2) In the reaction kettle, add 40 g of hydroxyl-terminated silicone oil and 400 g of polyoxypropylene glycol (molecular weight: 1000) after the water removal treatment, and stir for 0.5 hours at room temperature;

[0027] Step 3) At 85°C, with a stirring rate of 90r / min, add 150g of isophorone diisocyanate and 1g of dibutyltin dilaurate into the flask, and react for 2-4 hours;

[0028] Step 4) After reacting for 2 hours, continuously measure the NCO content during the reaction process, and when the NCO content is close to the theoretical value, the silicon-containing polyurethane oligomer is obtained.

Embodiment 3

[0030] Step 1) 25 g of hydroxyl-terminated silicone oil and 600 g of polyoxypropylene glycol (molecular weight 2000) are respectively subjected to water removal treatment;

[0031] Step 2) In the reaction kettle, add 25g of hydroxyl-terminated silicone oil and 600g of polyoxypropylene glycol (molecular weight: 2000) after the water removal treatment, and stir for 0.5 hours at room temperature;

[0032] Step 3) At 85°C, with a stirring rate of 90r / min, add 120g of isophorone diisocyanate and 1g of dibutyltin dilaurate into the flask, and react for 2-4 hours;

[0033] Step 4) After reacting for 2 hours, continuously measure the NCO content during the reaction process, and when the NCO content is close to the theoretical value, the silicon-containing polyurethane oligomer is obtained.

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Abstract

The invention relates to the field of high polymer materials, and more particularly to a silicon-containing polyurethane oligomer and a preparation method thereof. The silicon-containing polyurethane oligomer described by the invention contains isophorone diisocyanate, polypropylene oxide glycol and hydroxyl end capping silicone oil; and the silicon-containing polyurethane oligomer has the characteristics of better glossiness, low surface tension, good abrasive resistance, hydrophobicity, oleophobicity and the like. The silicon-containing polyurethane oligomer is used for a moisture cured PU (polyurethane) synthetic leather coating material, a PU synthetic leather modified and moisture cured polyurethane waterproofing paint and a polyurethane elastomer prepolymer; and another aim of the invention is to provide a preparation method of the silicon-containing polyurethane oligomer, which is convenient for industrial production.

Description

technical field [0001] The invention relates to the field of polymer materials, and more specifically relates to a silicon-containing polyurethane oligomer and a preparation method thereof. [0002] technical background [0003] Polyurethane is a polymer material with urethane as its structural unit. It has good processing performance, excellent mechanical properties, wear resistance, oil resistance, solvent resistance, etc. It is widely used in construction, machinery, home appliances, transportation, national defense, etc. The field is currently a research hotspot of polymer materials; but the urethane group (-NH-COO-) in the molecule makes it insufficient in thermal stability, surface properties, aging resistance, temperature resistance, water resistance, etc. Applications are subject to certain restrictions. Organosilicon refers to the polysiloxane whose main chain skeleton contains Si—O—Si group structure. It has large molecular volume and low cohesive energy density, w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/40C08G18/48C08G18/61C09D175/08
CPCC08G18/4009C08G18/4825C08G18/61C09D175/08
Inventor 孙东明徐运欢罗文景卢灼均高鹏东
Owner GUANGZHOU SILOK POLYMER
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