阅读说明：本技术 一种植物基擦色剂及其制备方法 (Plant-based coloring agent and preparation method thereof ) 是由 田玉龙 王斌 张少朋 阁明泰 于 2020-07-29 设计创作，主要内容包括：一种新型环保的植物基擦色剂,由如下重量百分比的组分组成：植物基油脂2-10％；植物基水性聚氨酯树脂5-30％；环保溶剂20-50％；增稠剂0.5-3％；填料20-50％。本发明还提供了一种植物基擦色剂的制备方法,包括步骤：按组份比称取原料：植物基油脂,植物基水性聚氨酯树脂,环保溶剂,增稠剂,填料；将所述植物基油脂、所述环保型溶剂加入到制漆缸中并搅拌得到混合物；逐步向步骤S200的混合物中加入所述增稠剂、填料和植物基水性聚氨酯树脂分散即制得植物基擦色剂。通过原料合理搭配可获得不同的性能,对木材渗透性和附着力好,擦涂性和填充性优异。(A novel environment-friendly plant-based color wiping agent comprises the following components in percentage by weight: 2-10% of vegetable-based oil; 5-30% of plant-based waterborne polyurethane resin; 20-50% of an environment-friendly solvent; 0.5 to 3 percent of thickening agent; 20-50% of filler. The invention also provides a preparation method of the plant-based color wiping agent, which comprises the following steps: weighing the following raw materials in percentage by weight: vegetable-based grease, vegetable-based waterborne polyurethane resin, an environment-friendly solvent, a thickening agent and a filler; adding the vegetable-based grease and the environment-friendly solvent into a paint making jar and stirring to obtain a mixture; and (4) gradually adding the thickening agent, the filler and the plant-based aqueous polyurethane resin into the mixture obtained in the step S200, and dispersing to obtain the plant-based colorant. Different performances can be obtained by reasonably matching the raw materials, and the coating has good permeability and adhesive force to wood, and excellent wiping and filling properties.)

1. A method for preparing a plant-based colorant, the method comprising the steps of:

s100, weighing the following raw materials: vegetable-based grease, vegetable-based waterborne polyurethane resin, an environment-friendly solvent, a thickening agent and a filler;

s200, adding the vegetable-based oil and the environment-friendly solvent into a paint making cylinder and stirring to obtain a mixture;

and S300, gradually adding the thickening agent, the filler and the plant-based aqueous polyurethane resin into the mixture obtained in the step S200, and dispersing to obtain the plant-based colorant.

2. The method according to claim 1, wherein the weight ratio of each component in the step S100 is preferably: 2-10% of plant-based grease, 5-30% of plant-based waterborne polyurethane resin, 20-50% of environment-friendly solvent, 0.5-3% of thickening agent and 20-50% of filler.

3. The method of claim 1, wherein the environmentally friendly solvent is one or a combination of two or more of ethylene glycol tert-butyl ether, dipropylene glycol dimethyl ether, and dimethyl sulfoxide.

4. The method of claim 1, wherein the thickener is one or a combination of two or more of aerosil, bentonite, hydroxypropyl cellulose, and hydrophobically modified hydroxyethyl cellulose.

5. The method of claim 1, wherein the filler is one or a combination of more than two of polymethyl methacrylate powder, talcum powder, transparent powder and silicon micropowder.

6. The method as claimed in claim 1, wherein the rotation speed of the stirring in step S200 is 800-1000 rpm.

7. The method as claimed in claim 1, wherein the dispersion time is 20-30mins and the dispersion fineness is 20 μm or less in the step S300.

8. A method for producing the vegetable-based oil or fat according to claim 1, comprising the steps of: adding one or more of soybean oil, castor oil, linseed oil, rapeseed oil and palm oil into cracking kettle, adding 1-3 wt% of alkaline catalyst and molecular sieve catalyst, wherein the alkaline catalyst can be CaO and Na₂CO₃、K₂CO₃And one or more than two of KOH and the like, wherein the molecular sieve catalyst can be one or more than two of MCM-41, HZSM-5, USY and the like, a cracking heating device is started for cracking, after cracking is finished, a cracking product is cooled by a condenser and then collected in a centralized manner, and the plant-based oil is obtained.

9. A method for preparing the plant-based aqueous polyurethane resin according to claim 1, comprising the steps of:

s1000, preparing a prepolymer: weighing a proper amount of polycarbonate diol, the vegetable-based grease and isophorone diisocyanate to react to obtain a mixture A;

s2000, weighing a proper amount of dimethylolpropionic acid and an organic bismuth catalyst, adding the dimethylolpropionic acid and the organic bismuth catalyst into the mixture A, wherein the organic bismuth catalyst can be one or the combination of more than two of bismuth neodecanoate, bismuth laurate, bismuth isooctanoate and the like, and reacting to obtain a mixture B;

s3000, weighing a proper amount of triethylamine, adding the triethylamine into the mixture B after cooling, reacting for several minutes, adding water into the mixture B for emulsification to obtain a mixture C, weighing a proper amount of isophorone diamine chain extender, adding the isophorone diamine chain extender into the mixture C, and fully stirring to obtain the plant-based waterborne polyurethane resin.

10. The method according to claim 9, wherein in step S1000, by weight, the polycarbonate diol is 20 to 30 parts, the vegetable-based oil is 20 to 30 parts, and the isophorone diisocyanate is 40 to 45 parts; in step S2000, by weight, 10-15 parts of dimethylolpropionic acid and 0.1 part of organic bismuth catalyst are added; in the step S300, 10-15 parts of triethylamine and 5-10 parts of isophorone diamine are calculated by weight.

Technical Field

The invention belongs to the field of coatings, and particularly relates to a novel environment-friendly plant-based color wiping agent and a preparation method thereof.

Background

The color wiping process is an important ring in the furniture coating link, and can highlight wood grains, increase the layering and the stereoscopic impression of the wood surface and further improve the texture of furniture. Most of the traditional wiping agents are solvent-based wiping agents, which contain more than 50% of volatile organic solvents, cause great damage to the environment and the health of constructors, and meanwhile, the dependence on petroleum-based resources is reduced at the present that the petroleum-based resources are increasingly deficient.

Therefore, those skilled in the art have been devoted to developing a novel environmentally friendly colorant using renewable resources and a method for preparing the same.

Disclosure of Invention

To overcome the above-mentioned drawbacks of the prior art, the present invention provides an environment-friendly plant-based colorant comprising: 2-10% of plant-based grease, 5-30% of plant-based waterborne polyurethane resin, 20-50% of environment-friendly solvent, 0.5-3% of thickening agent and 20-50% of filler.

The invention also provides a preparation method of the plant-based color wiping agent, which comprises the following steps:

s100, weighing the following raw materials: vegetable-based grease, vegetable-based waterborne polyurethane resin, an environment-friendly solvent, a thickening agent and a filler;

s200, adding the vegetable-based oil and the environment-friendly solvent into a paint making cylinder and stirring to obtain a mixture;

and S300, gradually adding the thickening agent, the filler and the plant-based aqueous polyurethane resin into the mixture obtained in the step S200, and dispersing to obtain the plant-based colorant.

The advantages and effects of the invention are as follows:

the invention is prepared by adopting the vegetable-based grease and the vegetable-based waterborne polyurethane resin and adding the environment-friendly solvent and the environment-friendly filler, and the product has good permeability and adhesive force to wood, excellent wiping and filling properties and strong wiping layering.

Detailed Description

The invention discloses a plant-based color wiping agent, which comprises the following components in percentage by weight:

2-10% of plant-based grease, 5-30% of plant-based waterborne polyurethane resin, 20-50% of environment-friendly solvent, 0.5-3% of thickening agent and 20-50% of filler.

The invention discloses a preparation method of a plant-based color wiping agent, which comprises the following steps:

s100, weighing the following raw materials: vegetable-based grease, vegetable-based waterborne polyurethane resin, an environment-friendly solvent, a thickening agent and a filler;

s200, adding the vegetable-based oil and the environment-friendly solvent into a paint making cylinder and stirring to obtain a mixture;

and S300, gradually adding the thickening agent, the filler and the plant-based aqueous polyurethane resin into the mixture obtained in the step S200, and dispersing to obtain the plant-based colorant.

In a preferred embodiment, the weight ratio of each component in the step S100 is: 2-10% of plant-based grease, 5-30% of plant-based waterborne polyurethane resin, 20-50% of environment-friendly solvent, 0.5-3% of thickening agent and 20-50% of filler.

In a preferred embodiment, the rotation speed of the stirring in the step S200 is 800-1000 rpm.

In a preferred embodiment, the dispersion time in step S300 is 20-30mins, and the dispersion fineness is less than or equal to 20 μm.

The vegetable-based oil and fat is prepared by the following method: adding one or more of soybean oil, castor oil, linseed oil, rapeseed oil, palm oil, etc. into cracking kettle, and adding 1-3 wt% of alkaline catalyst and molecular sieve catalyst, wherein the alkaline catalyst can be CaO, Na₂CO₃、K₂CO₃And one or more than two of KOH and the like, wherein the molecular sieve catalyst can be one or more than two of MCM-41, HZSM-5, USY and the like, a cracking heating device is started, the temperature is set to be 5 ℃/min after reaching 350 ℃, the temperature is raised to 450 ℃ to finish cracking, and the cracking product is cooled by a condenser and then collected in a centralized manner to obtain the plant-based oil.

The plant-based waterborne polyurethane resin is prepared by the following method, and comprises the following steps:

s1000, preparing a prepolymer: weighing polycarbonate diol, the vegetable-based grease and isophorone diisocyanate according to the weight, and reacting to obtain a mixture A;

s2000, weighing dimethylolpropionic acid and an organic bismuth catalyst by weight, adding the dimethylolpropionic acid and the organic bismuth catalyst into the mixture A, wherein the organic bismuth catalyst can be one or the combination of more than two of bismuth neodecanoate, bismuth laurate, bismuth isooctanoate and the like, and reacting to obtain a mixture B;

s3000, cooling the mixture B to 48-52 ℃, weighing triethylamine, adding the cooled mixture B into the mixture B, reacting for 5mins, adding water into the mixture B for emulsification to obtain a mixture C, weighing an isophorone diamine chain extender, adding the isophorone diamine chain extender into the mixture C, and stirring for 1 hour to obtain a plant-based waterborne polyurethane resin;

wherein, the plant-based waterborne polyurethane resin is synthesized according to the following route:

in the step S1000, 20-30 parts of polycarbonate diol, 20-30 parts of vegetable-based grease and 40-45 parts of isophorone diisocyanate are reacted at the temperature of 80-100 ℃ for 40-60 mins; in the step S2000, 10-15 parts of dimethylolpropionic acid and 0.1 part of organic bismuth catalyst are reacted at the temperature of 70-75 ℃ for 3-5 h; in the step S3000, 10-15 parts of triethylamine and 5-10 parts of isophorone diamine are reacted for 5-8 mins.

In a preferred embodiment, the environmentally friendly solvent is one or a combination of two or more of ethylene glycol tert-butyl ether, dipropylene glycol dimethyl ether and dimethyl sulfoxide.

In a preferred embodiment, the thickener is one or a combination of more than two of gas silicon, bentonite, hydroxypropyl cellulose and hydrophobically modified hydroxyethyl cellulose.

In a preferred embodiment, the filler is one or a combination of more than two of polymethyl methacrylate powder, talcum powder, transparent powder and silicon micropowder.

The following describes several preferred embodiments of the present invention to make the technical contents thereof clearer and easier to understand. The present invention may be embodied in many different forms of embodiments and the scope of the invention is not limited to the embodiments set forth herein.