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Waterborne polyurethane synthesized by waterborne polyester and preparation method of waterborne polyurethane

A water-based polyurethane and water-based polyester technology, applied in the chemical industry, can solve the problems of high price of dimethylol propionic acid and large amount of dimethylol propionic acid, and achieve the effect of improving bond strength and stress.

Inactive Publication Date: 2012-05-02
广州市才德化学制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In addition, the amount of dimethylolpropionic acid in the polyurethane segment is large, and the price of dimethylolpropionic acid is relatively expensive

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] A kind of water-based polyurethane synthesized by water-based polyester, in parts by weight, its formula is:

[0051] Raw material name

[0052] Isopentyl glycol 10,

[0053] Diethylene glycol 34.8,

[0054] Polyethylene terephthalate 45,

[0055] Adipic acid 9.36,

[0056] Polyethylene glycol PEG40018.5,

[0057] Sodium isophthalic acid sulfonate 8.9,

[0058] Sodium acetate 0.45,

[0059] Acetone 20,

[0060] Dihydroxyethylpropionic acid 7,

[0061] Isophorone diisocyanate 37,

[0062] Ethylenediamine 0.2,

[0063] Triethylamine 4.2,

[0064] Deionized water 250.

[0065] On the 1000 ml four-neck flask, install a stirring motor, a condenser, a condensation water collector, a nitrogen pipe, and a temperature controller, and then add diethylene glycol, isoprene glycol, and polyethylene terephthalate respectively PET, heat up to 240-300°C to react until there are no solid particles, add adipic acid, polyethylene glycol PEG400, sodium isophthalic acid sulfonat...

Embodiment 2

[0067]A kind of water-based polyurethane synthesized by water-based polyester, in parts by weight, its formula is:

[0068] Raw material name

[0069] Diethylene glycol 20.81,

[0070] Ethylene glycol 14.8,

[0071] Terephthalic acid 37,

[0072] iso-phthalic acid 9,

[0073] Adipic acid 9.36,

[0074] Polyethylene glycol PEG400 18.5,

[0075] Sodium isophthalic acid sulfonate 5.9,

[0076] Sodium acetate 0.45,

[0077] Acetone 0,

[0078] Dihydroxyethylpropionic acid 6.24,

[0079] Toluene diisocyanate 26.8,

[0080] Ethylenediamine 0.08,

[0081] Triethylamine 4.2,

[0082] Deionized water 250.

[0083] On a 1000 ml four-necked flask, install a stirring motor, a condenser, a condensed water collector, a nitrogen pipe, and a temperature controller, and then add diethylene glycol, ethylene glycol, tere-phthalic acid, and m-phthalic acid respectively. Formic acid, adipic acid, polyethylene glycol PEG400, sodium m-phthalic acid sulfonate and sodium acetate, heat up ...

Embodiment 3

[0085] A kind of water-based polyurethane synthesized by water-based polyester, in parts by weight, its formula is:

[0086] Raw material name

[0087] Isopentyl glycol 10,

[0088] Diethylene glycol 34.8,

[0089] Polyethylene terephthalate 45,

[0090] Adipic acid 9.36,

[0091] Polyethylene glycol PEG40018.5,

[0092] Sodium isophthalic acid sulfonate 8.9,

[0093] Sodium acetate 0.45,

[0094] Acetone 40,

[0095] Dihydroxyethylpropionate 6,

[0096] Diphenylmethane diisocyanate 37,

[0097] Ethylenediamine 0.2,

[0098] Triethylamine 4.2,

[0099] Deionized water 250.

[0100] On the 1000 ml four-neck flask, install a stirring motor, a condenser, a condensation water collector, a nitrogen pipe, and a temperature controller, and then add diethylene glycol, isoprene glycol, and polyethylene terephthalate respectively PET, heat up to 240-300°C to react until there are no solid particles, add adipic acid, polyethylene glycol PEG400, sodium isophthalic acid sulfona...

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Abstract

The invention discloses waterborne polyurethane synthesized by waterborne polyester. The waterborne polyurethane comprises the following components in a formula in parts by weight: 30-100 parts of polyalcohol, 5-60 parts of polybasic acid, 10-20 parts of polyalcohols, 10-20 parts of hydrophilic monomer, 0-40 parts of solvent, 20-40 parts of polyisocyanates, 4-10 parts of alkali binding agent and 220-280 parts of water. Water-soluble or water-dispersible polyester is used as soft-segment synthesized polyurethane of the waterborne polyester, so that the proportion of the polyester in the waterborne polyurethane is improved. The invention also discloses a preparation method of the waterborne polyurethane. The waterborne polyurethane prepared by the invention has the advantages of uniformity in distribution of a hydrophilic functional group, high molecular weight, high bonding strength and high film strength and can be separately used or mixed with other polymer latex and the like to use.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and specifically relates to water-based polyurethane synthesized from water-based polyester and a preparation method thereof. Background technique [0002] Waterborne polyurethane is more and more widely used in adhesives, coatings and other fields due to its solvent-free and pollution-free properties. The main synthesis method of water-based polyurethane is the addition polymerization of various polyols or amines and polyisocyanates in the presence of hydrophilic monomers, mainly dimethylolpropionic acid, and then adding alkali neutralizers, mostly triethylamine, It is then dispersed in water. Polyester is the most common and important polyol. [0003] When polyester is used as polyol, since polyester itself is hydrophobic, when the molecular weight of polyester is larger, such as greater than 5000 Daltons, the water-based polyurethane synthesized by it is unstable. If the hydrophili...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/42C08G18/46C08G63/688C08G63/672
Inventor 王寿亭刘亮张浩礼汤燕行李闫东
Owner 广州市才德化学制品有限公司
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