Preparation method and product of side long chain alkyl polyurethane chain extender

A long-chain alkyl polyurethane and chain alkyl polyurethane technology, applied in the field of chain extenders, can solve the problems of low initial decomposition temperature of polyurethane elastomers, poor cold resistance of polyurethane elastomers, complicated preparation process, etc., and achieve high yield, The effect of short production cycle and simple process

Active Publication Date: 2015-07-15
HUBEI DAYA BIOLOGICAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the onset decomposition temperature of the polyurethane elastomer prepared with this mixed chain extender is low
At the same time, the preparation process of the chain extender containing uracil side group is very complicated, the yield is low, the cost is high, and the cold resistance of the polyurethane elastomer prepared by using it as the chain extender is also poor.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Example 1 Preparation method of side long-chain alkyl polyurethane chain extender of the present invention

[0039] The raw materials of the preparation method include:

[0040] Diisocyanate: toluene diisocyanate 1mol (174.2g)

[0041] Higher fatty alcohol: n-octanol 1mol (130.2g)

[0042] Polyhydroxy compound: glycerol 1mol (92.1g)

[0043] Catalyst: 0.12g stannous octoate

[0044] Organic solvent: 40g acetone

[0045] The specific steps of the preparation method:

[0046] (1) The step of dehydration pretreatment of polyhydroxy compound, in which the polyhydroxy compound is dehydrated and pretreated under vacuum and heating conditions to obtain anhydrous polyhydroxy compound; specifically:

[0047] (1.1) Put polyhydroxy compounds into the dehydration unit;

[0048] (1.2) Heat to 95~100℃, and process 60min under -0.099MPa vacuum degree;

[0049] (1.3) The temperature is lowered to below 50°C, the vacuum is released, and the product is sealed and stored to obtain anhydrous polyhydroxy c...

Embodiment 2

[0059] Example 2 Preparation method of side long chain alkyl polyurethane chain extender of the present invention

[0060] The raw materials of the preparation method include:

[0061] Diisocyanate: 1mol of isophorone diisocyanate (222.3g)

[0062] Higher fatty alcohol: n-decyl alcohol 1mol (158.3g)

[0063] Polyhydroxy compound: Butanetriol 1mol (106.1g)

[0064] Catalyst: Dibutyltin dilaurate 0.20g

[0065] Organic solvent: 50g methyl ethyl ketone

[0066] The specific steps of the preparation method:

[0067] (1) The step of dehydration pretreatment of polyhydroxy compound, in which the polyhydroxy compound is dehydrated and pretreated under vacuum and heating conditions to obtain anhydrous polyhydroxy compound; specifically:

[0068] (1.1) Put polyhydroxy compounds into the dehydration unit;

[0069] (1.2) Heat to 100°C and treat for 80min under a vacuum of -0.098MPa;

[0070] (1.3) The temperature is lowered to below 50°C, the vacuum is released, and the product is sealed and stored to o...

Embodiment 3

[0080] Example 3 Preparation method of side long chain alkyl polyurethane chain extender of the present invention

[0081] The raw materials of the preparation method include:

[0082] Diisocyanate: 1,6-hexamethylene diisocyanate 1mol (168.0g)

[0083] Higher fatty alcohol: 1mol of dodecanol (186.3g)

[0084] Polyhydroxy compound: triethanolamine 1mol (149.2g)

[0085] Catalyst: 0.19g stannous octoate

[0086] Organic solvent: butyl acetate 60g

[0087] The specific steps of the preparation method:

[0088] (1) The step of dehydration pretreatment of polyhydroxy compound, in which the polyhydroxy compound is dehydrated and pretreated under vacuum and heating conditions to obtain anhydrous polyhydroxy compound; specifically:

[0089] (1.1) Put polyhydroxy compounds into the dehydration unit;

[0090] (1.2) Heat to 100°C and treat for 70min under a vacuum of -0.099MPa;

[0091] (1.3) The temperature is lowered to below 50°C, the vacuum is released, and the product is sealed and stored to obtain...

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PUM

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Abstract

The invention relates to a preparation method and product of a side long chain alkyl polyurethane chain extender. The preparation method comprises the following steps: preparing raw materials including diisocyanate, higher aliphatic alcohol, polyhydroxy compounds, a catalyst and an organic solvent; performing dehydration pretreatment on the polyhydroxy compounds; alkylating diisocyanate; and alkylating the polyhydroxy compounds to prepare the side long chain alkyl polyurethane chain extender. The preparation method disclosed by the invention is strong in controllability and simple in equipment; the side long chain alkyl polyurethane chain extender prepared by using the method disclosed by the invention can be used for preparing various polyurethane materials so as to ensure that relatively high content of side long chain alkyl groups can be introduced into polyurethane macromolecules, significant water-repellent and anti-fouling properties can be brought to the polyurethane materials, and good market prospects can be achieved; and the product is safe and environment-friendly, and is convenient to use.

Description

Technical field [0001] The invention relates to a chain extender used for the preparation of various polyurethane polymer materials to introduce side long-chain alkyl groups into the polyurethane polymer, in particular to a method for preparing a side long-chain alkyl polyurethane chain extender and its products . Background technique [0002] Polyurethane polymer materials are often used for coating and finishing of various substrates. In order to solve the problems of low-temperature fatigue and poor elasticity, extensibility, and functionality of traditional polyurethane coating agents, polyurethane coating agents modified with various functional monomers are increasingly becoming mainstream products in the field of coating processing. Functional polyurethane finishing agents are generally obtained by introducing various functional monomers or reactive functional molecules into the polyurethane skeleton through chemical reactions such as block copolymerization, grafting, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/78C08G18/32C08G18/48C08G18/50C09D175/04C09D5/16D06M15/564
Inventor 权衡张梦月倪丽杰刘俊琦李祥潘名玉徐依依王兵陈冰清
Owner HUBEI DAYA BIOLOGICAL TECH CO LTD
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