Environment-friendly polyurethane prepolymer and preparation method thereof

A polyurethane prepolymer, environmentally friendly technology, applied in the field of fine chemicals, can solve the problem of high free isocyanate content, achieve the effects of high shear strength, reduced release and low cost

Inactive Publication Date: 2017-05-17
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the main purpose of the present invention is to provide a kind of environment-friendly type polyurethane prepolymer and preparation method thereof, for overcoming the problem of high free isocyanate content in the existing isocyanate-terminated polyurethane prepolymer

Method used

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  • Environment-friendly polyurethane prepolymer and preparation method thereof
  • Environment-friendly polyurethane prepolymer and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0042] Weigh 100 parts of polypropylene carbonate diol, add it into a glass reactor with a vacuum device, vacuum dehydrate at 100°C for 2 hours, add 0.04 parts of phosphoric acid, 0.04 parts of stannous octoate, 70 parts of liquefied MDI, and heat at 80°C React for 2 hours, lower the temperature to 40°C, add KH540, and react for 1 hour to obtain a siloxane-modified polyurethane prepolymer.

Embodiment 2

[0044] Weigh 100 parts of polypropylene carbonate diol, add it into a glass reactor with a vacuum device, vacuum dehydrate at 100°C for 2 hours, add 0.18 parts of phosphoric acid, 0.04 parts of stannous octoate, 39 parts of liquefied MDI, and heat at 80°C React for 2 hours, lower the temperature to 40°C, add 10 parts of KH540, and react for 1 hour to obtain a siloxane-modified polyurethane prepolymer.

Embodiment 3

[0046]Weigh 100 parts of polypropylene carbonate diol, add it into a glass reactor with a vacuum device, vacuum dehydrate at 100°C for 2 hours, add 0.08 parts of phosphoric acid, 0.04 parts of stannous octoate, 39 parts of liquefied MDI, and heat at 70°C React for 4 hours, lower the temperature to 20°C, add 3 parts of KH540, and react for 1.5 hours to obtain a siloxane-modified polyurethane prepolymer.

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Abstract

The invention belongs to the field of fine chemical engineering, and particularly relates to an environment-friendly polyurethane prepolymer and a preparation method thereof. Polypropylene carbonate polylol and isocyanates are used as raw materials to prepare a polyurethane adhesive, and the polyurethane adhesive is subjected to termination modification by organosilane to obtain the environment-friendly polyurethane prepolymer, thereby lowering the release of free isocyanates and other substances harmful to the human body, and implementing no pollution. The prepolymer has the advantages of high strength, hydrolysis resistance, low bubbling tendency and stable performance, and can be widely used in the fields of traditional production of adhesives, sealants, paints and elastomers and the like.

Description

technical field [0001] The invention belongs to the field of fine chemicals, and in particular relates to an environment-friendly polyurethane prepolymer and a preparation method thereof. Background technique [0002] Polyurethane is a kind of polymer whose main chain contains -NHCOO- repeating structural unit, and is mainly polymerized by isocyanate and hydroxyl compound. Since polyurethane contains strong polar carbamate groups, it is insoluble in non-polar groups, and has good oil resistance, toughness, wear resistance, aging resistance and adhesion, and can be prepared with a wide temperature range. Materials such as elastomers, thermoplastic resins, and thermosetting resins. As an organic polymer material with high cost performance, polyurethane is widely used in various fields in real life, and its output and consumption are also increasing year by year. Statistics show that in 2014, China's polyurethane consumption reached 9.6 million tons, and China's polyurethane ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/44C08G18/38C08G18/12
CPCC08G18/44C08G18/12C08G18/3893
Inventor 丁鹄岚冼文琪刘保华
Owner GUANGDONG UNIV OF TECH
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