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Polyurethane chain extender with anti-ultraviolet aging function and preparation method thereof

An anti-ultraviolet aging, polyurethane technology, applied in the preparation of organic compounds, chemical instruments and methods, organic chemistry and other directions, can solve the problems of easy heat, easy migration, etc.

Active Publication Date: 2019-04-23
嘉善县临沪新城实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] An object of the present invention is to provide a chain extender for polyurethane with anti-ultraviolet aging function. After the chain extender reacts with the polyurethane prepolymer, the ultraviolet absorber is covalently bonded to the main chain of the polyurethane molecule , to overcome the shortcomings of adding small molecule ultraviolet light absorbers that are easy to migrate and easy to be thermally decomposed

Method used

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  • Polyurethane chain extender with anti-ultraviolet aging function and preparation method thereof
  • Polyurethane chain extender with anti-ultraviolet aging function and preparation method thereof
  • Polyurethane chain extender with anti-ultraviolet aging function and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A chain extender for polyurethane with anti-ultraviolet aging function, its structural formula is formula (I):

[0023]

[0024] The compound of formula (I) has the name: 3-(N,N,-2-hydroxyethyl-aminomethyl)-2,4-dihydroxybenzophenone (HAHBP).

[0025] A preparation method of a chain extender for polyurethane with an anti-ultraviolet aging function, the specific steps are:

[0026] Put 1.22 parts by weight of diethanolamine into the reactor, under the protection of nitrogen, after heating to 50°C, put in 0.31 parts by weight of paraformaldehyde powder with a molecular weight of 30.03, after the addition, raise the temperature to 60°C, and keep it warm for 1.0h , then 2.27 parts by weight of 2,4-dihydroxybenzophenone was dissolved in 6 parts by weight of methanol, and then added to the reactor, kept at 60°C for 2.5h, and then the product was washed twice with water and dried Afterwards, a compound of formula (I) is obtained.

[0027] The obtained product is a slightly...

Embodiment 2

[0033] A chain extender for polyurethane with anti-ultraviolet aging function, its structural formula is formula (I):

[0034]

[0035] The compound of formula (I) has the name: 3-(N,N,-2-hydroxyethyl-aminomethyl)-2,4-dihydroxybenzophenone (HAHBP).

[0036] A preparation method of a chain extender for polyurethane with an anti-ultraviolet aging function, the specific steps are:

[0037] Put 2.23 parts by weight of diethanolamine into the reactor, under the protection of nitrogen, after heating to 70°C, put in 1.3 parts by weight of aqueous formaldehyde solution with a mass fraction of 37%, after the addition, raise the temperature to 80°C, and keep it warm for 2.5h , then 2.27 parts by weight of 2,4-dihydroxybenzophenone was dissolved in 12 parts by weight of methanol, then added to the reactor, kept at 80°C for 5 hours, and then the product was washed 4 times with water, dried , to obtain a compound of formula (I).

[0038] The obtained product is a slightly viscous soli...

Embodiment 3

[0044] A chain extender for polyurethane with anti-ultraviolet aging function, its structural formula is formula (I):

[0045]

[0046] The compound of formula (I) has the name: 3-(N,N,-2-hydroxyethyl-aminomethyl)-2,4-dihydroxybenzophenone (HAHBP).

[0047] A preparation method of a chain extender for polyurethane with an anti-ultraviolet aging function, the specific steps are:

[0048] Put 1.725 parts by weight of diethanolamine into the reactor, under the protection of nitrogen, after heating to 60°C, put in 0.395 parts by weight of paraformaldehyde powder with a molecular weight of 30.03, after the addition, raise the temperature to 70°C, and keep it warm for 1.8h , then 2.27 parts by weight of 2,4-dihydroxybenzophenone was dissolved in 9 parts by weight of methanol, and then added to the reactor, kept at 70°C for 3.8h, and then the product was washed 3 times with water and dried Afterwards, a compound of formula (I) is obtained.

[0049] The obtained product is a slig...

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Abstract

The invention discloses an anti-ultraviolet aging chain extender for polyurethane and a preparation method thereof. Specifically, the anti-ultraviolet aging chain extender for polyurethane has a structural formula shown as formula (I) in the specification. After reaction of the chain extender prepared by the method provided by the invention with a polyurethane prepolymer, the ultraviolet absorber is connected to a polyurethane molecule main chain by a covalent bond, thus overcoming the disadvantages of easy migration and easy heating decomposition in adding of a small molecular ultraviolet absorbent.

Description

technical field [0001] The invention relates to the field of polymer additives. More specifically, the invention relates to a chain extender for polyurethane with anti-ultraviolet aging function and a preparation method thereof. Background technique [0002] As a polymer material with excellent performance, polyurethane has been widely used in various fields such as clothing, petrochemical industry, transportation, automobile, aviation and so on. Chain extender is an indispensable auxiliary in the synthesis process of polyurethane, which can increase the molecular weight of polyurethane and endow polyurethane with certain properties. At present, there are many kinds of chain extenders for polyurethane, including polyols, alcohol amines, and diamines. etc., such as the traditional chain extender 3,3'-dichloro-4,4'-diaminodiphenylmethane, which is currently the most commonly used aromatic diamine chain extender, but 2-chloroaniline has the potential to cause cancer risk. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/32C07C221/00C07C225/16
CPCC07C221/00C07C225/16C08G18/329
Inventor 于淑娟陆树文李玉金
Owner 嘉善县临沪新城实业有限公司
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