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Preparation method of soybean oil-based waterborne polyurethane light-cured resin

A technology of water-based polyurethane and light-curing resin, which is applied in the field of preparation of water-based polyurethane light-curing resin, can solve the problems of high toxicity, oily polyurethane pollution of the environment, and high cost, and achieve the effects of alleviating energy pressure, protecting the environment, and saving resources

Inactive Publication Date: 2017-06-13
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Oily polyurethane pollutes the environment, has high toxicity and high cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Follow the steps below to prepare soybean oil-based waterborne polyurethane photocurable resin:

[0026] (1) Add 910g (1mol) of epoxidized soybean oil with an average of 2.2 epoxy groups per molecule in a four-neck flask equipped with mechanical stirring, reflux condenser, constant pressure dropping funnel and thermometer, and slowly heat up to 70°C , then get 190g (2.2mol) methacrylic acid, 11g (1%) triphenylphosphine, 1.1g (0.1%) p-methoxyphenol and mix evenly, then join in the constant pressure dropping funnel, Slowly added dropwise to the reaction flask under mechanical stirring, and the dropwise addition was completed within 1 h;

[0027] (2) Continue to heat up to 90°C and stir for 4h;

[0028] (3) Sampling and measuring the acid value every 30 minutes, until the system acid value is constant, down to room temperature, to obtain soybean oil-based polyols containing terminal double bonds;

[0029] (4) Add 100g (0.1mol) soybean oil-based polyols containing termina...

Embodiment 2

[0033] Follow the steps below to prepare soybean oil-based waterborne polyurethane photocurable resin:

[0034] (1) Add 910g (1mol) of epoxidized soybean oil with an average of 2.3 epoxy groups per molecule in a four-neck flask equipped with mechanical stirring, reflux condenser, constant pressure dropping funnel and thermometer, and slowly heat up to 75°C 180g (2.5mol) of acrylic acid, 16g (1.5%) of tetrabutylammonium bromide, and 5.5g (0.5%) of p-methoxyphenol were mixed uniformly, and then added to a constant pressure dropping funnel. Slowly added dropwise to the reaction flask under mechanical stirring, and the dropwise addition was completed within 30 minutes;

[0035] (2) Continue to heat up to 95°C and stir for 3.5h;

[0036] (3) Sampling and measuring the acid value every 30 minutes, until the system acid value is constant, down to room temperature, to obtain soybean oil-based polyols containing terminal double bonds;

[0037] (4) Add 100 g (0.1 mol) of soybean oil-b...

Embodiment 3

[0041]Follow the steps below to prepare soybean oil-based waterborne polyurethane photocurable resin:

[0042] (1) Add 910g (1mol) of epoxidized soybean oil with an average of 2.5 epoxy groups per molecule in a four-necked flask equipped with mechanical stirring, reflux condenser, constant pressure dropping funnel and thermometer, and slowly heat up to 80°C , and then take 202g (2.8mol) of acrylic acid, 22g (2%) of N,N-dimethylbenzylamine, 8.9g (0.8%) of 2-tert-butylhydroquinone and mix them evenly, then add them to the constant pressure In the dropping funnel, slowly add dropwise to the reaction bottle under vigorous mechanical stirring, and the dropwise addition is completed within 1 hour;

[0043] (2) Continue to heat up to 100°C and stir for 3h;

[0044] (3) Sampling and measuring the acid value every 30 minutes, until the system acid value is constant, down to room temperature, to obtain soybean oil-based polyols containing terminal double bonds;

[0045] (4) Add 160 g ...

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Abstract

The invention discloses a preparation method of soybean oil-based waterborne polyurethane light-cured resin. The preparation method comprises the following steps: adding epoxy soybean oil into a reaction bottle; raising the temperature and stirring; uniformly mixing one of acrylic acid and methacrylic acid, a catalyst and a polymerization inhibitor, and adding a mixture into the reaction bottle; continually raising the temperature of the reaction kettle; after reacting for a period of time, cooling to room temperature to obtain soybean oil-based polyatomic alcohol containing terminal double bonds; adding the soybean oil-based polyatomic alcohol containing the terminal double bonds into a four-opening flask provided with a condensation tube and a thermometer; stirring at low temperature and adding diisocyanate; after reacting for a period of time, adding dihydromethyl propionic acid and 1,4-butanediol; keeping the heat; adding an end blocking agent and reacting; adding a neutralizing agent for neutralizing to obtain a polyurethane pre-polymer; finally, adding de-ionized water and emulsifying to obtain needed resin. According to the preparation method provided by the invention, soybean oil, which is a renewable resource, is utilized and energy source pressure can be alleviated; the polymerization inhibitor is utilized, so that the acrylic acid or the methacrylic acid is prevented from self-polymerization under reaction temperature; the preparation method provided by the invention is simple, efficient, controllable and environment-friendly.

Description

technical field [0001] The invention belongs to the technical field of preparation of waterborne polyurethane photocurable resin, and in particular relates to a preparation method of soybean oil-based waterborne polyurethane photocurable resin. Background technique [0002] Polyurethane is a class of polymers containing urethane characteristic units in the main chain. This polymer material is widely used in industrial fields such as adhesives, coatings, low-speed tires, gaskets, and car mats. In the field of daily life, polyurethane is often used to make various foams and plastic sponges. According to different dispersants, polyurethane is divided into oily polyurethane and water-based polyurethane. Oily polyurethane pollutes the environment, has high toxicity and high cost. Water-based polyurethane uses water as a dispersant, greatly reducing the amount of organic solvents, reducing costs and toxicity. Polyurethanes are usually produced by reacting diisocyanates with po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/67C08G18/34C08G18/32C08J5/18C08L75/14
CPCC08G18/6705C08G18/3206C08G18/348C08G18/672C08G18/673C08J5/18C08J2375/14
Inventor 王念贵赵梦婷
Owner HUBEI UNIV
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