阅读说明：本技术 一种多功能发泡水性树脂及其制备方法 (Multifunctional foaming water-based resin and preparation method thereof ) 是由 李桂军 李浩扬 张锋 冯会生 甄雷雷 于 2020-12-14 设计创作，主要内容包括：本发明公开了一种多功能发泡水性树脂及其制备方法,由以下组分按以下重量份配制而成：大分子多元醇65-75份、异氰酸酯10-20份、亲水性扩链剂5-10份、小分子醇类扩链剂0.5-2份、具有光稳定性的改性有机硅5-10份、催化剂0.1-0.3份、中和剂3-7份、有机溶剂5-10份、后扩链剂1-10份和去离子水100-150份。本发明采用阴离子型水性聚氨酯树脂的制备方法,选用DMBA或DMPA作为亲水性扩链剂,引入羧基基团,加入中和剂中和,加水乳化形成水性聚氨酯分散体,在预聚时引入经过改性的有机硅树脂,改性有机硅树脂中引入光稳定剂,因此得到的树脂不仅具有有机硅改性聚氨酯本身具有的优异的耐候性、耐水性和物理性能,并且还拥有耐紫外线和耐酒精的性能。(The invention discloses a multifunctional foaming water-based resin and a preparation method thereof, wherein the multifunctional foaming water-based resin is prepared from the following components in parts by weight: 65-75 parts of macromolecular polyol, 10-20 parts of isocyanate, 5-10 parts of hydrophilic chain extender, 0.5-2 parts of micromolecular alcohol chain extender, 5-10 parts of modified organic silicon with light stability, 0.1-0.3 part of catalyst, 3-7 parts of neutralizer, 5-10 parts of organic solvent, 1-10 parts of post chain extender and 150 parts of deionized water 100-. The invention adopts the preparation method of the anionic waterborne polyurethane resin, DMBA or DMPA is selected as a hydrophilic chain extender, carboxyl groups are introduced, a neutralizer is added for neutralization, water is added for emulsification to form a waterborne polyurethane dispersion, modified organic silicon resin is introduced during prepolymerization, and a light stabilizer is introduced into the modified organic silicon resin, so that the obtained resin not only has excellent weather resistance, water resistance and physical properties of the organic silicon modified polyurethane, but also has ultraviolet resistance and alcohol resistance.)

1. A multifunctional foaming water-based resin is characterized in that: the composition is prepared from the following components in parts by weight: 65-75 parts of macromolecular polyol, 10-20 parts of isocyanate, 5-10 parts of hydrophilic chain extender, 0.5-2 parts of micromolecular alcohol chain extender, 5-10 parts of modified organic silicon with light stability, 0.1-0.3 part of catalyst, 3-7 parts of neutralizer, 5-10 parts of organic solvent, 1-10 parts of post chain extender and 150 parts of deionized water 100-.

2. The multifunctional foaming water-based resin of claim 1, which is characterized in that: the molecular weight of the macromolecular polyol is 2000-5000, and the macromolecular polyol is one or more of polytetrahydrofuran ether polyol, polypropylene glycol, polyethylene oxide polyol and polypropylene oxide polyol.

3. The multifunctional foaming water-based resin of claim 1, which is characterized in that: the isocyanate is one or more of hexamethylene diisocyanate, cyclohexyl diisocyanate, 4' -dicyclohexylmethane diisocyanate and isophorone diisocyanate.

4. The multifunctional foaming water-based resin of claim 1, which is characterized in that: the molar ratio of the isocyanic acid radicals to the hydroxyl groups of the macromolecular polyol is 1: 1-2:1.

5. The multifunctional foaming water-based resin of claim 1, which is characterized in that: the hydrophilic chain extender is one or more of dimethylolpropionic acid and dimethylolbutyric acid.

6. The multifunctional foaming water-based resin of claim 1, which is characterized in that: the micromolecular alcohol chain extender is one or more of ethylene glycol, 2-methyl-1, 3-propylene glycol, diethylene glycol, 1, 4-butanediol, 2, 3-butanediol, 1, 6-hexanediol, neopentyl glycol, diethylene glycol, glycerol, trimethylolpropane, sorbitol and trimethylolcyclohexane.

7. The multifunctional foaming water-based resin of claim 1, which is characterized in that: the modified organic silicon is prepared by the following steps:

s1, synthesizing hydrogen-containing siloxane at double ends

Adding 18-20 parts of hydrogen-containing double-end socket H4 and 40-45 parts of octamethylcyclotetrasiloxane D4 into a kettle-type reactor, stirring at the room temperature at the speed of 500-600r/min, slowly heating to 70-80 ℃, slowly adding 0.04-0.06 part of concentrated sulfuric acid catalyst, heating to 105-110 ℃, reacting for 2-3H, cooling to 55-60 ℃, and adding alkali liquor to neutralize to neutrality;

s2, synthesizing modified organic silicon with light stabilizer performance

Continuously adding 40-45 parts of copolymerizable light stabilizer 4,4' -dihydroxy benzophenone and 0.2-0.3 part of chloroplatinic acid/isopropanol solution with the mass fraction of 1-10% into an S1 middle kettle type reactor at room temperature, heating to 90-95 ℃, reacting for 3-4h, and then distilling at normal pressure to remove the solvent to obtain the modified organic silicon with the light stabilizer performance.

8. The multifunctional foaming water-based resin of claim 1, which is characterized in that: the catalyst is organic bismuth, the neutralizing agent is triethylamine, the organic solvent is acetone, and the rear chain extender is one or more of ethylenediamine, 1, 6-hexamethylenediamine, isophorone diamine and polyether amine.

9. Use of the multifunctional foaming resin according to claims 1-8 in medical protectors.

10. A method for preparing the multifunctional foaming resin according to claims 1 to 8, which is characterized by comprising the following steps:

a. putting macromolecular polyalcohol and modified organic silicon into a reactor, heating to 100-120 ℃, dehydrating for 1-2h under the vacuum degree of > -0.09MPa, and cooling to 50-70 ℃; adding a hydrophilic chain extender, stirring uniformly, adding isocyanate, and reacting at 80-95 ℃ for 1-3 h; cooling to 60-75 ℃, adding the micromolecular chain extender, and continuing to react for 0.5-1.5 h; cooling to less than 50 ℃, adding a catalyst and acetone, stirring, heating to 75-85 ℃, and reacting for 2-4 h; then cooling to 20 ℃, adding a neutralizing agent and an organic solvent, and stirring for 10-60min to obtain a prepolymer;

b. emulsifying the prepolymer, wherein the emulsifying process comprises the following steps: regulating the rotation speed to 1200r/min, adding deionized water into the prepolymer, continuously stirring for 5-10min after dispersing, regulating the rotation speed to 1800r/min, adding a rear chain extender, and continuously stirring for 1-2h to obtain a prepolymer emulsion;

c. desolventizing the prepolymer emulsion, wherein the desolventizing process comprises the following steps: heating the prepolymer emulsion to 50-60 ℃ and removing acetone in the emulsion under the condition of-0.08 MPa to obtain the multifunctional foaming water-based resin.

Technical Field

The invention belongs to the field of preparation of high polymer materials, and particularly relates to a multifunctional foaming water-based resin and a preparation method thereof.

Background

The polyurethane is a polymer prepared from raw materials such as polyisocyanate and polyether polyol or polyester polyol or/and chain extenders or cross-linking agents such as micromolecular polyol, polyamine or water, and the prepared polymer takes water as a dispersion medium instead of an organic solvent to obtain the waterborne polyurethane. The waterborne polyurethane resin has the advantages of safety, reliability, no pollution, good compatibility, excellent mechanical property and film forming property and the like, so that the waterborne polyurethane resin is widely applied to the fields of textile printing and dyeing processing, leather processing, adhesives, furniture paint, electrophoretic paint, medical treatment and the like. However, the single waterborne polyurethane in the prior art has poor high temperature resistance and water resistance, and the popularization and the application of the single waterborne polyurethane are limited.

The medical protective clothing has good isolation and protection effects, can effectively prevent pathogenic bacteria and toxic or corrosive chemicals from directly harming the skin of a human body, and is widely applied to modern life. Various medical braces have been developed based on the synthetic materials. However, the existing materials applied to the field of medical protectors, such as PVC, natural latex, butyronitrile and the like, are more or less problematic, PVC is not light and heat resistant, free radicals can be released under the influence of light and heat, metal salt stabilizers such as lead, barium, tin and the like are usually added into the PVC to capture the free radicals, but the metals can seep out of glove products, so that chronic or acute metal poisoning is caused, and the health of human beings is threatened; the natural rubber latex contains 2.0 to 3.0 percent of non-rubber component protein component. These protein components migrate to the surface of the natural rubber gloves during the manufacturing process, and some people wear the latex gloves for a long time to cause anaphylactic reaction and anaphylaxis during the contact process, wherein the first symptom is urticaria, and anaphylactic shock and even death can be caused in severe cases. Therefore, the residual amount of water-soluble proteins in the natural latex gloves is in direct correlation with the frequency and severity of allergic reactions, which limits the application fields of the natural latex gloves to a certain extent; the nitrile gloves must be subjected to a high-temperature vulcanization step in the preparation process, so the process is limited by the dosage of the vulcanizing agent, the vulcanization temperature and the vulcanization time. The vulcanizing agent has pungent smell and pollutes the environment, because the vulcanizing agent contains sulfur, the potential hazards of flammability and explosiveness exist, the price of the vulcanizing agent is high, and the cost of the butyronitrile gloves is increased. Therefore, there is a need for a method for improving the performance of waterborne polyurethane, which has the performance of high temperature resistance, wear resistance, scratch resistance, ultraviolet resistance, water resistance, alcohol resistance and the like suitable for the medical protective equipment field. Therefore, the multifunctional foaming water-based resin and the preparation method thereof are provided.

Disclosure of Invention

The invention mainly aims to provide a multifunctional foaming water-based resin and a preparation method thereof, which can effectively solve the problems in the background technology.

In order to achieve the purpose, the invention adopts the technical scheme that:

the technical scheme of the invention is as follows:

the multifunctional foaming water-based resin is prepared from the following components in parts by weight: 65-75 parts of macromolecular polyol, 10-20 parts of isocyanate, 5-10 parts of hydrophilic chain extender, 0.5-2 parts of micromolecular alcohol chain extender, 5-10 parts of modified organic silicon with light stability, 0.1-0.3 part of catalyst, 3-7 parts of neutralizer, 5-10 parts of organic solvent, 1-10 parts of post chain extender and 150 parts of deionized water 100-.

Further, the molecular weight of the macromolecular polyol is 2000-5000, and the macromolecular polyol is one or more of polytetrahydrofuran ether polyol, polypropylene glycol, polyethylene oxide polyol and polypropylene oxide polyol.

Further, the isocyanate is one or more of hexamethylene diisocyanate, cyclohexyl diisocyanate, 4' -dicyclohexylmethane diisocyanate and isophorone diisocyanate.

Further, the molar ratio between the isocyanate groups and the hydroxyl groups of the macromolecular polyol is 1: 1-2:1.

Further, the hydrophilic chain extender is one or more of dimethylolpropionic acid and dimethylolbutyric acid.

Further, the small molecular alcohol chain extender is one or more of ethylene glycol, 2-methyl-1, 3-propylene glycol, diethylene glycol, 1, 4-butanediol, 2, 3-butanediol, 1, 6-hexanediol, neopentyl glycol, diethylene glycol, glycerol, trimethylolpropane, sorbitol and trimethylolcyclohexane.

Preferably, the modified silicone is obtained by the following steps:

s1, synthesizing hydrogen-containing siloxane at double ends

Adding 18-20 parts of hydrogen-containing double-end socket H4 and 40-45 parts of octamethylcyclotetrasiloxane D4 into a kettle-type reactor, stirring at the speed of 500-600r/min at room temperature, slowly heating to 70-80 ℃, slowly adding a concentrated sulfuric acid catalyst, heating to 105-110 ℃, reacting for 2-3H, cooling to below 60 ℃, and adding sodium bicarbonate to neutralize to neutrality;

s2, synthesizing modified organic silicon with light stabilizer performance

And (2) adding 40-45 parts of copolymerizable light stabilizer 4,4' -dihydroxy benzophenone and 0.2-0.3 part of chloroplatinic acid/isopropanol solution with the mass fraction of 1-10% into the kettle type reactor at room temperature, heating to 90-95 ℃, reacting for 3-4h, and then distilling at normal pressure to remove the solvent to obtain the modified organic silicon with the light stabilizer performance.

Further, the catalyst is organic bismuth, the neutralizing agent is triethylamine, the organic solvent is acetone, and the rear chain extender is one or more of ethylenediamine, 1, 6-hexamethylenediamine, isophoronediamine and polyetheramine.

An application of multifunctional foaming resin in the field of medical protective equipment.

The preparation method of the multifunctional foaming resin comprises the following steps:

a. putting macromolecular polyalcohol and modified organic silicon into a reactor, heating to 100-120 ℃, dehydrating for 1-2h under the vacuum degree of > -0.09MPa, and cooling to 50-70 ℃; adding a hydrophilic chain extender, stirring uniformly, adding isocyanate, and reacting at 80-95 ℃ for 1-3 h; cooling to 60-75 ℃, adding the micromolecular chain extender, and continuing to react for 0.5-1.5 h; cooling to less than 50 ℃, adding a catalyst and acetone, stirring, heating to 75-85 ℃, and reacting for 2-4 h; then cooling to 20 ℃, adding a neutralizing agent and an organic solvent, and stirring for 10-60min to obtain a prepolymer;

b. emulsifying the prepolymer, wherein the emulsifying process comprises the following steps: regulating the rotation speed to 1200r/min, adding deionized water into the prepolymer, continuously stirring for 5-10min after dispersing, regulating the rotation speed to 1800r/min, adding a rear chain extender, and continuously stirring for 1-2h to obtain a prepolymer emulsion;

c. desolventizing the prepolymer emulsion, wherein the desolventizing process comprises the following steps: heating the prepolymer emulsion to 50-60 ℃ and removing acetone in the emulsion under the condition of-0.08 MPa to obtain the multifunctional foaming water-based resin.

Compared with the prior art, the invention has the following beneficial effects:

the invention adopts the preparation method of the anionic waterborne polyurethane resin, DMBA or DMPA is selected as a hydrophilic chain extender, carboxyl groups are introduced, a neutralizer is added for neutralization, water is added for emulsification to form a waterborne polyurethane dispersion, modified organic silicon resin is introduced during prepolymerization, and a light stabilizer is introduced into the modified organic silicon resin, so that the obtained resin not only has excellent weather resistance, water resistance and physical properties of the organic silicon modified polyurethane, but also has ultraviolet resistance and alcohol resistance.

The multifunctional foaming resin disclosed by the invention is soft, high in strength, wear-resistant, scratch-resistant, good in film forming property, water-resistant, ultraviolet-resistant and alcohol-resistant, is suitable for manufacturing medical protective clothing, such as medical protective clothing, medical protective caps and the like, and overcomes the defect that the traditional disposable medical protective appliance cannot be recycled.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

In each of the following examples, commercial products were obtained except for the modified silicone.

Reaction raw materials:

polytetrahydrofuran ether polyol: dow, Shanghai and melt chemical industries, Ltd

Isophorone diisocyanate: dow, Shanghai and melt chemical industries, Ltd

1, 4-butanediol: shanghai Shunya chemical import and export Limited

Dimethylolbutyric acid: shandong Kepler Biotech Co., Ltd

Acetone: aladdin reagent (Shanghai) Co., Ltd

Triethylamine: aladdin reagent (Shanghai) Co., Ltd

Ethylene diamine: aladdin reagent (Shanghai) Co., Ltd

Organic bismuth: shanghai-jin chemical trade company Limited

Example 1

a. Putting 75g of polytetrahydrofuran ether polyol and 5g of modified organic silicon into a 250mL four-neck flask provided with a thermometer, a stirrer and a reflux condenser, heating to 110 ℃, dehydrating for 1h under the vacuum degree of > -0.09MPa, cooling to 60 ℃, adding 10g of dried anion chain extender dimethylolbutyric acid, stirring uniformly, adding 15g of isophorone diisocyanate, and reacting for 2h at 90 ℃. The temperature is reduced to 70 ℃, 1.5g of micromolecular chain extender 1, 4-butanediol is added, and the reaction is continued for 1 hour at 70 ℃. Cooling to less than 50 ℃, adding 0.5g of catalyst organic bismuth and 2ml of acetone, stirring and heating to 75 ℃ for reaction for 4 hours. Then cooling to 20 ℃, adding 7g of neutralizing agent triethylamine and 2ml of acetone, and stirring for 30min to obtain a prepolymer;

b. emulsifying the prepolymer, wherein the emulsifying process comprises the following steps: adding 130g of deionized water into a flask, adjusting the rotating speed to 1200r/min, dispersing, continuing to stir for 5-10min, adding 8g of aqueous solution of ethylene diamine serving as a rear chain extender, adjusting the rotating speed to 800r/min, and continuing to stir for 1-2h to obtain dispersion emulsion;

c. desolventizing the emulsion, wherein the desolventizing process comprises the following steps: heating the emulsion to 55 ℃ and removing acetone in the emulsion under the conditions of-0.08 MPa to obtain the multifunctional foaming water-based resin.

Example 2

a. Putting 72g of polytetrahydrofuran ether polyol and 8g of modified organic silicon into a 250mL four-neck flask provided with a thermometer, a stirrer and a reflux condenser, heating to 110 ℃, dehydrating for 1h under the vacuum degree of > -0.09MPa, cooling to 60 ℃, adding 7g of dried anion chain extender dimethylolbutyric acid, stirring uniformly, putting 18g of isophorone diisocyanate, and reacting for 2h at 90 ℃. The temperature is reduced to 70 ℃, 1.5g of micromolecular chain extender 1, 4-butanediol is added, and the reaction is continued for 1 hour at 70 ℃. Cooling to less than 50 ℃, adding 0.7g of catalyst organic bismuth and 2ml of acetone, stirring and heating to 75 ℃ for reaction for 4 hours. Then cooling to 20 ℃, adding 4g of neutralizing agent triethylamine and 2ml of acetone, and stirring for 30min to obtain a prepolymer;

b. emulsifying the prepolymer, wherein the emulsifying process comprises the following steps: adding 135g of deionized water into a flask, adjusting the rotating speed to 1200r/min, dispersing, continuing to stir for 5-10min, adding 6g of aqueous solution of ethylene diamine serving as a rear chain extender, adjusting the rotating speed to 800r/min, and continuing to stir for 1-2h to obtain dispersion emulsion;

c. desolventizing the emulsion, wherein the desolventizing process comprises the following steps: heating the emulsion to 55 ℃ and removing acetone in the emulsion under the conditions of-0.08 MPa to obtain the multifunctional foaming water-based resin.

Example 3

a. 70g of polytetrahydrofuran ether polyol and 10g of modified organic silicon are put into a 250mL four-neck flask provided with a thermometer, a stirrer and a reflux condenser, the temperature is increased to 110 ℃, dehydration is carried out for 1h under the vacuum degree of > -0.09MPa, the temperature is reduced to 60 ℃, 5g of dried anion chain extender dimethylolbutyric acid is added, 18g of isophorone diisocyanate is added after uniform stirring, and the reaction is carried out for 2h at 90 ℃. The temperature is reduced to 70 ℃, 1.5g of micromolecular chain extender 1, 4-butanediol is added, and the reaction is continued for 1 hour at 70 ℃. Cooling to less than 50 ℃, adding 0.9g of catalyst organic bismuth and 2ml of acetone, stirring and heating to 75 ℃ for reaction for 4 hours. Then cooling to 20 ℃, adding 3g of neutralizing agent triethylamine and 2ml of acetone, and stirring for 30min to obtain a prepolymer;

b. emulsifying the prepolymer, wherein the emulsifying process comprises the following steps: adding 145g of deionized water into a flask, adjusting the rotating speed to 1200r/min, dispersing, continuing to stir for 5-10min, adding 4g of aqueous solution of ethylene diamine serving as a rear chain extender, adjusting the rotating speed to 800r/min, and continuing to stir for 1-2h to obtain dispersion emulsion;

c. desolventizing the emulsion, wherein the desolventizing process comprises the following steps: heating the emulsion to 55 ℃ and removing acetone in the emulsion under the conditions of-0.08 MPa to obtain the multifunctional foaming water-based resin.

Comparative example 1

a. Putting 75g of polytetrahydrofuran ether polyol into a 250mL four-neck flask provided with a thermometer, a stirrer and a reflux condenser, heating to 110 ℃, dehydrating for 1h under the vacuum degree of > -0.09MPa, cooling to 60 ℃, adding 8g of dried anion chain extender dimethylolbutyric acid, stirring uniformly, adding 15g of isophorone diisocyanate, and reacting for 2h at 90 ℃. The temperature is reduced to 70 ℃, 1.5g of micromolecular chain extender 1, 4-butanediol is added, and the reaction is continued for 1 hour at 70 ℃. Cooling to less than 50 ℃, adding 0.5g of catalyst organic bismuth and 2ml of acetone, stirring and heating to 75 ℃ for reaction for 4 hours. Then cooling to 20 ℃, adding 4g of neutralizing agent triethylamine and 2ml of acetone, and stirring for 30min to obtain a prepolymer;

b. emulsifying the prepolymer, wherein the emulsifying process comprises the following steps: adding 135g of deionized water into a flask, adjusting the rotating speed to 1200r/min, dispersing, continuing to stir for 5-10min, adding 8g of aqueous solution of ethylene diamine serving as a rear chain extender, adjusting the rotating speed to 800r/min, and continuing to stir for 1-2h to obtain dispersion emulsion;

c. desolventizing the emulsion, wherein the desolventizing process comprises the following steps: heating the emulsion to 55 ℃ and removing acetone in the emulsion under the conditions of-0.08 MPa to obtain the unmodified common water-based resin.

Comparative example 2

a. Putting 70g of polytetrahydrofuran ether polyol and 10g of polydimethylsiloxane into a 250mL four-neck flask provided with a thermometer, a stirrer and a reflux condenser, heating to 110 ℃, dehydrating for 1h under the vacuum degree of > -0.09MPa, cooling to 60 ℃, adding 5g of dried anionic chain extender dimethylolbutyric acid, stirring uniformly, putting 18g of isophorone diisocyanate, and reacting for 2h at 90 ℃. The temperature is reduced to 70 ℃, 1.5g of micromolecular chain extender 1, 4-butanediol is added, and the reaction is continued for 1 hour at 70 ℃. Cooling to less than 50 ℃, adding 0.9g of catalyst organic bismuth and 2ml of acetone, stirring and heating to 75 ℃ for reaction for 4 hours. Then cooling to 20 ℃, adding 3g of neutralizing agent triethylamine and 2ml of acetone, and stirring for 30min to obtain a prepolymer;

b. emulsifying the prepolymer, wherein the emulsifying process comprises the following steps: adding 145g of deionized water into a flask, adjusting the rotating speed to 1200r/min, dispersing, continuing to stir for 5-10min, adding 4g of aqueous solution of ethylene diamine serving as a rear chain extender, adjusting the rotating speed to 800r/min, and continuing to stir for 1-2h to obtain dispersion emulsion;

c. desolventizing the emulsion, wherein the desolventizing process comprises the following steps: heating the emulsion to 55 ℃ and removing acetone in the emulsion under the conditions of-0.08 MPa to obtain the common organic silicon modified water-based resin.

Examples 4-6 are methods of preparing modified silicones:

example 4

The modified organic silicon is prepared by the following steps:

s1, synthesizing hydrogen-containing siloxane at double ends

Adding 18 parts of hydrogen-containing double-end socket H4 and 45 parts of octamethylcyclotetrasiloxane D4 into a kettle type reactor, stirring at the room temperature at the speed of 550r/min, slowly heating to 75 ℃, slowly adding a concentrated sulfuric acid catalyst, heating to 105 ℃, and reacting for 2 hours. Then cooling to below 60 ℃, adding sodium bicarbonate to neutralize to neutrality.

S2, synthesizing modified organic silicon with light stabilizer performance

Adding 40 parts of copolymerizable light stabilizer 4,4' -dihydroxy benzophenone and 0.3 part of hydrogen platinic acid/isopropanol solution with the mass fraction of 3% into the kettle type reactor at room temperature, heating to 95 ℃, reacting for 4h, and distilling at normal pressure to remove the solvent to obtain the modified organic silicon with the light stabilizer performance.

Example 5

The modified organic silicon is prepared by the following steps:

s1, synthesizing hydrogen-containing siloxane at double ends

19 parts of hydrogen-containing double-end socket H4 and 43 parts of octamethylcyclotetrasiloxane D4 are added into a kettle type reactor, stirred at the speed of 560r/min at room temperature, then slowly heated to 78 ℃, added with a concentrated sulfuric acid catalyst, heated to 105 ℃ again and reacted for 2 hours. Then cooling to below 60 ℃, adding sodium bicarbonate to neutralize to neutrality.

S2, synthesizing modified organic silicon with light stabilizer performance

And (2) adding 42 parts of copolymerizable light stabilizer 4,4' -dihydroxy benzophenone and 0.3 part of hydrogen platinic acid/isopropanol solution with the mass fraction of 3% into the kettle type reactor at room temperature, heating to 95 ℃, reacting for 3h, and then distilling under normal pressure to remove the solvent to obtain the modified organic silicon with the light stabilizer performance.

Example 6

The modified organic silicon is prepared by the following steps:

s1, synthesizing hydrogen-containing siloxane at double ends

Adding 20 parts of hydrogen-containing double-end socket H4 and 40 parts of octamethylcyclotetrasiloxane D4 into a kettle type reactor, stirring at the room temperature at the speed of 600r/min, slowly heating to 80 ℃, slowly adding a concentrated sulfuric acid catalyst, heating to 105 ℃, and reacting for 2 hours. Then cooling to below 60 ℃, adding sodium bicarbonate to neutralize to neutrality.

S2, synthesizing modified organic silicon with light stabilizer performance

Adding 45 parts of copolymerizable light stabilizer 4,4' -dihydroxy benzophenone and 0.2 part of hydrogen platinic acid/isopropanol solution with the mass fraction of 3% into the kettle type reactor at room temperature, heating to 95 ℃, reacting for 4h, and distilling at normal pressure to remove the solvent to obtain the modified organic silicon with the light stabilizer performance.

The multifunctional foaming water-based resin prepared in the examples 1 to 3 and the comparative examples 1 to 2 is subjected to performance detection, and the detection standards and the detection results are as follows:

as is apparent from Table 1, the examples of the present invention have good physical properties, appearance and hand, and have alcohol resistance and ultraviolet resistance which are not possessed by conventional aqueous resins and silicone-modified resins.

The foamed resin of the present invention can be used as a coating material for a composite material for medical devices. The foaming resin is coated on the surface of the base fabric, and is dried and formed by an oven to prepare the water-based resin composite material. By reprocessing the composite material, a recyclable medical protective tool is obtained, and the composite material has a good application value in the application field of medical protectors.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.