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Polyurethane with amino-containing side chain and preparation method thereof

A polyurethane and amino group-containing technology, applied in the field of polyurethane, can solve the problems of difficult to control product structure, limited amino group content, expensive raw materials, etc., and achieve the effects of control of reaction conditions, low production cost and abundant sources.

Active Publication Date: 2022-05-13
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But there are the following problems: (1) the amino group is only connected to the end of the linear polyurethane, and a polyurethane molecular chain only contains two amino groups, and its amino content is very limited; (2) the prepolymer containing isocyanate is directly connected to the same end Amino hyperbranched polymer reaction, the raw materials used are expensive, and the product structure is difficult to control; (3) heavy metal catalysts need to be used in the preparation process, and their residues in the polymer material have toxicity problems; (4) the method of protection / deprotection is adopted The preparation of amino-containing polyurethanes has problems such as many preparation steps, complicated reaction process, long reaction time, and low reaction efficiency.

Method used

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  • Polyurethane with amino-containing side chain and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A polyurethane with amino groups in its side chain and a preparation method thereof. Its preparation steps are:

[0031] Step 1, polymer dibasic alcohol and diisocyanate are added in the aprotic solvent, in N 2 Stir for 4-6 hours under the condition of atmosphere and 50-70° C., then add a chain extender, and stir for 0.5-2 hours under the condition of 85-100° C. to prepare the polyurethane containing double bonds. in:

[0032] The mass ratio of the diisocyanate: the polymer diol is (0.01-0.06): 1;

[0033] The aprotic solvent: the mass ratio of the polymer glycol is (0.5~1): 1;

[0034] The mass ratio of the chain extender to the polymer diol is (0.001˜0.01):1.

[0035] Step 2. Add the compound containing mercapto group and amino group and the photoinitiator to the polyurethane containing double bond prepared in step 1, react at room temperature and under the condition of ultraviolet light for 1-6 hours, and prepare the polyurethane containing amino group in the sid...

Embodiment 2

[0046] A polyurethane with amino groups in its side chain and a preparation method thereof. Its preparation steps are:

[0047] Step 1, polymer dibasic alcohol, diisocyanate are added in the aprotic solvent, in N 2 Stir for 2-4 hours under the condition of atmosphere and 70-85° C., then add a chain extender, and stir for 2-4 hours under the condition of 70-85° C. to prepare the polyurethane containing double bonds. in:

[0048] The mass ratio of the diisocyanate: the polymer diol is (0.06-0.35): 1;

[0049] The aprotic solvent: the mass ratio of the polymer glycol is (1~1.5): 1;

[0050]The mass ratio of the chain extender: the polymer diol is (0.01˜0.1):1.

[0051] Step 2. Add the compound containing mercapto group and amino group and the photoinitiator to the polyurethane containing double bond prepared in step 1, and react for 30-60 minutes at room temperature and under the condition of ultraviolet light to prepare the polyurethane containing amino group in the side cha...

Embodiment 3

[0062] A polyurethane with amino groups in its side chain and a preparation method thereof. Its preparation steps are:

[0063] Step 1, polymer dibasic alcohol, diisocyanate are added in the aprotic solvent, in N 2 Stirring under the condition of 85-100 DEG C for 2-4 hours in the atmosphere, then adding a chain extender, and stirring under the condition of 85-100 DEG C for 4-8 hours to prepare the polyurethane containing double bonds. in:

[0064] The diisocyanate: the mass ratio of the polymer diol is (0.35~1): 1;

[0065] The aprotic solvent: the mass ratio of the polymer glycol is (1.5-2.0): 1;

[0066] The mass ratio of the chain extender: the polyethylene glycol is (0.1-0.5):1.

[0067] Step 2. Add the compound containing mercapto group and amino group and the photoinitiator to the polyurethane containing double bond prepared in step 1, react at room temperature and under the condition of ultraviolet light for 5s-30min, and prepare the polyurethane containing amino gr...

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Abstract

The invention relates to polyurethane with an amino-containing side chain and a preparation method of the polyurethane. According to the technical scheme, the preparation method comprises the following steps: step 1, adding polymer dihydric alcohol and diisocyanate into an aprotic solvent, stirring for 0.5-6 hours under the condition of N2 atmosphere and 50-100 DEG C, then adding a chain extender, and stirring for 0.5-12 hours under the condition of 50-100 DEG C to prepare polyurethane containing double bonds; and step 2, adding a compound containing sulfydryl and amino and a photoinitiator into the polyurethane containing the double bonds prepared in the step 1, and reacting for 5 seconds to 6 hours under the conditions of room temperature and ultraviolet irradiation, so as to prepare the polyurethane containing the amino on the side chain. The preparation method has the characteristics of simple process, low cost, high efficiency, easiness in regulation and control of polymer structure, low toxicity, environment friendliness and easiness in industrial production, and the prepared polyurethane containing amino on the side chain is high in amino content, controllable, safe, non-toxic and wide in application prospect.

Description

technical field [0001] The invention belongs to the technical field of polyurethane. Specifically relates to a side chain amino-containing polyurethane and a preparation method thereof. Background technique [0002] Polyurethane has good biodegradability and biocompatibility, and its molecular structure has flexible "tailoring", that is, polyurethane with various chemical structures can be obtained through molecular design. Therefore, it has been widely studied and applied in the field of polymer materials in recent decades. [0003] In order to improve the performance of polyurethane or endow it with functional properties, the introduction of active group amino groups into polyurethane has aroused the interest of many scientists. "An amino-terminated aqueous polyurethane dispersion and its preparation method" (CN104211898B) patented technology, reacting a linear polyurethane prepolymer with a polyamine chain extender to obtain an amino-terminated polyurethane. "A hyperbr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/44C08G18/48C08G18/50C08G18/67C08G18/38C08G18/42C08G18/65
CPCC08G18/44C08G18/675C08G18/3876C08G18/4277C08G18/4833C08G18/4854C08G18/482C08G18/5072C08G18/65
Inventor 周瑜陶旺旺陈红祥
Owner WUHAN UNIV OF SCI & TECH
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