CN105038571B - Heat resistant type vegetable oil based polyurethane floor coatings and preparation method thereof - Google Patents

Abstract

Heat resistant type vegetable oil based polyurethane floor coatings of the present invention, contain tri- components of A, B, C：The parts by weight composition of each raw material is in component A：Vegetable oil 100, polyalcohol 5~20, heat-proof modifier 10~30, catalyst 0.3~1, emulsifying agent 3~5, deionized water 60~120；B component is the isocyanates with rigid chain segment；The parts by weight composition of each raw material is in component C：Pigment 1~5, zeolite powder 5~10, kaolin or silica flour 20~30, deionized water 30~60；By weight A during coating:B:C=2:1~3:0.5~1 uses cooperatively.The preparation of the coating is comprised the steps of：(1) raw material prepares；(2) the preparation of each component：1. the preparation of component A；2. B component directly uses existing isocyanate products；3. the preparation of C components；(3) the A of preparation is separately packed with component C.The present invention both prepared polyurethane floor coatings using vegetable oil, and the heat resistance and mechanical property of vegetable oil based polyurethane floor coatings are effectively improved again.

Description

Heat-resistant vegetable oil-based polyurethane floor coating and preparation method thereof

technical field

The invention relates to the technical field of coatings, in particular to the technical field of floor coatings, in particular to a heat-resistant vegetable oil-based polyurethane floor coating and a preparation method thereof.

technical background

With the depletion of fossil resources and the increasing awareness of environmental protection, social needs have put forward new requirements for the coatings industry, namely the development of new coatings with environmental protection, high performance, water-based solvent-free, high solids, powder and radiation curing. The application of polyurethane coatings in current coatings is very extensive. There are common coatings, special coatings, industrial coatings, and architectural coatings. There are traces of polyurethane coatings almost everywhere. In the manufacture of polyurethane coatings, vegetable oil is a renewable resource with a wide range of sources. The use of hydroxyl-containing vegetable oils or hydroxylated vegetable oils as polyols to prepare polyurethane coatings has attracted people's attention. Since vegetable oil-based polyols have a multi-hydroxyl structure and can form a three-dimensional cross-linked structure, they should have good physical and chemical properties when used to prepare polyurethane floor coatings.

Chinese patents 201210267256.X and 201210291182.3 disclose: using vegetable oil as a raw material to prepare polyurethane flooring materials. However, since the long-chain structure of vegetable oil is aliphatic straight chain and has strong flexibility, the mechanical properties and heat resistance of polyurethane materials prepared with it are not ideal.

In order to improve the heat resistance of vegetable oil-based polyurethane flooring, Chinese patents 200810036486.9 and 200810036487.3 disclose the introduction of condensates of phthalic anhydride and polyols into vegetable oil-based polyurethane flooring coatings. Because they use the physical mixing method, they are not ideal for improving the heat resistance of vegetable oil-based polyurethane floor coatings.

U.S. Patents US19750567074 and US19760704945 disclosed: the composition and preparation method of vegetable oil-based polyurethane concrete floor, which introduces rosin-modified phenolic resin through physical mixing method, and the heat resistance of concrete floor has been improved to a certain extent, but the improvement no significant effect.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies in the prior art, and to provide a heat-resistant vegetable oil-based polyurethane floor coating, which is modified by using a modifier with an aromatic ring or a polycyclic ring structure to modify the vegetable oil-based polyol, which can improve The rigidity of the chain segment makes the prepared polyurethane floor coating have good heat resistance and mechanical properties. The second object of the present invention is to provide a preparation method of the heat-resistant vegetable oil-based polyurethane floor coating.

In order to realize the purpose of the above invention, the present invention adopts the following technical solutions.

A heat-resistant vegetable oil-based polyurethane floor coating is characterized in that it contains three components A, B and C,

The A component is a vegetable oil-based polyol emulsion, wherein the parts by weight of each raw material are composed of:

Vegetable oil: 100 parts by weight;

Polyol: 5-20 parts by weight;

Heat-resistant modifier: 10-30 parts by weight;

Catalyst: 0.3 to 1 part by weight;

Emulsifier: 3 to 5 parts by weight;

Deionized water: 60-120 parts by weight;

The B component is an isocyanate with a rigid segment;

The parts by weight of each raw material in the C component consist of:

Pigment: 1 to 5 parts by weight;

Zeolite powder: 5-10 parts by weight;

Kaolin or quartz powder: 20-30 parts by weight;

Deionized water: 30-60 parts by weight;

The components A, B and C are used together in a weight ratio of A:B:C=2:1-3:0.5-1.

Further, the vegetable oil is one of castor oil, soybean oil, linseed oil or palm oil.

Further, the polyhydric alcohol is an aliphatic polyhydric alcohol, which is one of ethylene glycol, diethylene glycol, glycerol or trimethylolpropane.

Further, the heat-resistant modifier is a compound or a low-molecular polymer having an aromatic ring or aliphatic ring structure and containing a hydroxyl group, a carboxyl group or an acid anhydride group.

Further, the heat-resistant modifier is one of resole phenolic resin, rosin or phthalic anhydride.

Further, the catalyst is one of titanate or lithium hydroxide.

Further, the emulsifier is one or two of polyoxyethylene nonylphenol ether, polyethylene glycol dioleate, and castor oil polyoxyethylene ether.

Further, the isocyanate is an isocyanate containing an aromatic ring or an aliphatic ring rigid structure.

Further, the isocyanate is one of modified diphenylmethane diisocyanate, toluene diisocyanate trimer, isophorone diisocyanate or polymethylene polyphenylisocyanate.

In order to achieve the above-mentioned second purpose, the present invention adopts the following technical solutions.

A preparation method of heat-resistant vegetable oil-based polyurethane floor coating, is characterized in that, comprises the following steps:

(1) Raw material preparation

①The heat-resistant vegetable oil-based polyurethane floor coating contains three components A, B, and C,

The parts by weight of each raw material in the described A component consist of:

Vegetable oil: 100 parts by weight;

Polyol: 5-20 parts by weight;

Heat-resistant modifier: 10-30 parts by weight;

Catalyst: 0.3 to 1 part by weight;

Emulsifier: 3 to 5 parts by weight;

Deionized water: 60-120 parts by weight;

The B component is an isocyanate with a rigid segment;

The parts by weight of each raw material in the C component filler consist of:

Pigment: 1 to 5 parts by weight;

Zeolite powder: 5-10 parts by weight;

Kaolin or quartz powder: 20-30 parts by weight;

Deionized water: 30-60 parts by weight;

② Prepare raw materials according to the weight of raw materials;

(2) Preparation of each component

① Preparation of component A

Ⅰ. Add vegetable oil, polyol, heat-resistant modifier, and catalyst to the reactor according to the proportion of parts by weight, vacuumize, and pass inert gas protection;

Ⅱ. Raise the temperature to 200-230°C and react for 2-3 hours, and then cool to room temperature to obtain vegetable oil-based polyol, which is discharged for use;

Ⅲ. Add the emulsifier and deionized water into the above reaction kettle according to the proportion of parts by weight, stir rapidly at room temperature, and slowly add the vegetable oil-based polyol obtained in step Ⅱ dropwise while stirring, and the dropwise addition should be controlled within 0.5 to 1 hour Complete described vegetable oil-based polyol;

Ⅳ. Continue to stir for 0.5 to 2 hours to obtain vegetable oil-based polyol emulsion;

② Component B directly adopts existing isocyanate products;

③ Preparation of component C

Put the pigment, zeolite powder, kaolin or quartz powder, and deionized water into the tank in turn according to the weight composition of component C in step (1), start the disperser, and stir at a speed of 400-800 rpm for 15-30 Disperse in minutes to obtain a uniformly dispersed component C mixture;

④ Separately batch and disperse the A component and the C component;

(3) Packaging

The components A and C prepared in step (2) are packaged separately through canning and dispensing equipment.

The positive effect of the present invention is:

(1) The use of vegetable oil to prepare polyurethane floor coatings not only utilizes the good physical and chemical properties of vegetable oil, but also utilizes the advantages of vegetable oil as a natural product, wide source, low cost, and renewable.

(2) A modifier with an aromatic ring or aliphatic ring structure is used, which is grafted into the polyol component through reaction, which effectively improves the rigidity of the soft segment of vegetable oil-based polyurethane; an isocyanate with an aromatic ring or aliphatic ring rigid structure is selected , effectively improving the rigidity of the hard segment; through the synergistic effect of the above two, the heat resistance and mechanical properties of vegetable oil-based polyurethane floor coatings can be effectively improved.

(3) The preparation method is simple and scientific, and large-scale production can be carried out.

detailed description

The specific implementation of the heat-resistant vegetable oil-based polyurethane floor coating of the present invention and its preparation method will be further introduced below, and 4 examples and 1 comparative example will be provided. However, it should be noted that implementation of the present invention is not limited to the following embodiments.

Embodiment 1 A kind of preparation method of heat-resistant vegetable oil-based polyurethane floor paint, comprises the following steps:

(1) Raw material preparation

① The heat-resistant vegetable oil-based polyurethane floor coating includes three components A, B and C.

The parts by weight of each raw material in the described A component consist of:

Castor oil: 100 parts by weight, adopt the refined castor oil produced by Guangzhou Chengbei Chemical Co., Ltd.;

Glycerol: 16 parts by weight, adopt the glycerol (glycerol) produced by Shanghai Petrochemical Company;

Rosin: 25 parts by weight, adopt the first-grade rosin produced by Wuhan Black Pegasus Chemical Raw Materials Co., Ltd.;

Titanate: 0.5 parts by weight, using butyl titanate produced by Shanghai Debang Chemical Co., Ltd.;

Polyoxyethylene nonylphenol ether: 4 parts by weight, adopting the product produced by Jiangsu Haian Petrochemical Company, the model is TX-10;

Deionized water: 120 parts by weight.

The B component is diphenylmethane diisocyanate: a product of the model MDI-100 produced by Yantai Wanhua Company.

The parts by weight of each raw material in the C component filler consist of:

Green pigment: 3 parts by weight, the product that adopts German BASF company to produce, the model is K8740;

Zeolite powder: 8 parts by weight, adopts the zeolite powder produced by Ningbo Jiahe New Material Technology Co., Ltd.;

Kaolin: 25 parts by weight, using the 1250 mesh product produced by Huaian Huijiang Titanium Dioxide Co., Ltd.;

Deionized water: 40 parts by weight.

② Prepare the raw materials according to the weight of the raw materials.

(2) Preparation of each component

① Preparation of component A

Ⅰ. Add castor oil, glycerol, rosin, and butyl titanate to the reaction kettle in proportions by weight, vacuumize, and pass in an inert gas for protection.

II. Raise the temperature to 220° C. for 3 hours and then cool to room temperature to obtain vegetable oil-based polyol, which is discharged for use.

Ⅲ. Add 4 parts by weight of polyoxyethylene nonylphenol ether and 100 parts by weight of deionized water into the above reaction kettle, stir rapidly at room temperature, and slowly add the vegetable oil-based polyol obtained in step Ⅱ during the stirring, and control it at 0.5 Add the vegetable oil-based polyol dropwise in hours.

Ⅳ. Stirring was continued for 2 hours to obtain vegetable oil-based polyol emulsion.

② Component B directly adopts the product of model MDI-100 produced by Yantai Wanhua Company.

③ Preparation of component C

Put 3 parts by weight of pigments, 8 parts by weight of zeolite powder, 25 parts by weight of kaolin, and 40 parts by weight of deionized water into the tank, start the disperser, stir for 20 minutes at a speed of 500 rpm to disperse, and obtain evenly dispersed C Component mix.

④ Separately mix and disperse the components A and C.

(3) Packaging

The components A and C prepared in step (2) are packaged separately through canning and dispensing equipment.

Before coating, use the A component, B component and C component in a weight ratio of A:B:C=2:2:0.7: under stirring, first add C component to A component; Then slowly add component B into the mixed component of component A and component C, stir for 5 minutes, scrape it with a steamed knife, and then use a defoaming roller for defoaming treatment, and cure it at room temperature for 14 days to form a film.

Table 1 shows the test results of heat resistance and mechanical properties of the heat-resistant vegetable oil-based polyurethane floor coating prepared in Example 1 after film formation.

Embodiment 2 A preparation method of heat-resistant vegetable oil-based polyurethane floor coating, comprising the following steps:

(1) Raw material preparation

① The heat-resistant vegetable oil-based polyurethane floor coating includes three components A, B and C.

The parts by weight of each raw material in the described A component consist of:

Soybean oil: 100 parts by weight, adopt the soybean oil produced by Ji'an Red Apple Natural Perfume Oil Co., Ltd.;

Ethylene glycol: 5 parts by weight, adopt the ethylene glycol produced by Shanghai Petrochemical Company;

Phthalic anhydride: 10 parts by weight, adopt the phthalic anhydride produced by Jinling Petrochemical Company;

Lithium hydroxide 0.3 weight part, adopts the lithium hydroxide that Shanghai Zhongli Company produces;

Polyethylene glycol dioleate: 3 parts by weight, adopting the product produced by Jiangsu Hai'an Petrochemical Company, the model is PEG-400;

Deionized water: 60 parts by weight.

The B component is a trimer of toluene diisocyanate, which is produced by German Bayer Company and whose model is Desmodur-L75.

The parts by weight of each raw material in the C component filler consist of:

Green pigment: 5 parts by weight, the product that adopts Germany BASF company to produce, the model is K8740;

Zeolite powder: 10 parts by weight, adopts the zeolite powder produced by Ningbo Jiahe New Material Technology Co., Ltd.;

Quartz powder: 30 parts by weight, adopting the 1250 mesh product produced by Guangzhou Yifeng Mining Co., Ltd.;

Deionized water: 30 parts by weight.

② Prepare the raw materials according to the weight of the raw materials.

(2) Preparation of each component

① Preparation of component A

Ⅰ. Add soybean oil, ethylene glycol, phthalic anhydride, and lithium hydroxide into the reactor according to the proportion of parts by weight, vacuumize, and pass in an inert gas for protection.

II. Raise the temperature to 200° C. to react for 2 hours, and then cool to room temperature to obtain vegetable oil-based polyol, which is discharged for use.

Ⅲ. Add 3 parts by weight of polyethylene glycol dioleate and 60 parts by weight of deionized water into the above reaction kettle, stir rapidly at room temperature, and slowly add the vegetable oil-based polyol obtained in step Ⅱ during the stirring, and control it at The vegetable oil-based polyol was added dropwise in 1 hour.

IV. Continue stirring for 0.5 hour to obtain vegetable oil-based polyol emulsion.

② Component B directly adopts the product of model Desmodur-L75 produced by German Bayer company.

③ Preparation of component C

Put 5 parts by weight of pigments, 10 parts by weight of zeolite powder, 30 parts by weight of quartz powder, and 40 parts by weight of deionized water into the tank, start the disperser, stir for 15 minutes at a speed of 400 rpm to disperse, and obtain a uniformly dispersed C component mixture;

④ Separately mix and disperse the components A and C.

(3) Packaging

The components A and C prepared in step (2) are packaged separately through canning and dispensing equipment.

Before coating, use the A component, B component and C component in a weight ratio of A:B:C=2:1:0.5: first add C component to A component in the stirring state; Then slowly add component B into the mixed component of component A and component C, stir for 5 minutes, scrape it with a steamed knife, and then use a defoaming roller for defoaming treatment, and cure at room temperature for 14 days to form a film.

Table 1 shows the test results of heat resistance and mechanical properties of the heat-resistant vegetable oil-based polyurethane floor coating prepared in Example 2 after film formation.

Embodiment 3 A preparation method of heat-resistant vegetable oil-based polyurethane floor coating, comprising the following steps:

(1) Raw material preparation

① The heat-resistant vegetable oil-based polyurethane floor coating includes three components A, B and C.

The parts by weight of each raw material in the described A component consist of:

Linseed oil: 100 parts by weight, adopt the linseed oil produced by Ji'an Red Apple Natural Perfume Oil Co., Ltd.;

Diethylene glycol: 20 parts by weight, adopting the diethylene glycol produced by Shanghai Petrochemical Company;

Resole phenolic resin: 20 parts by weight, the product that adopts Jining Baichuan Chemical Co., Ltd. to produce, model is PF-6815;

Titanate: 1 part by weight, using butyl titanate produced by Shanghai Debang Chemical Co., Ltd.;

Castor oil polyoxyethylene ether: 5 parts by weight, adopting the product produced by Jiangsu Hai'an Petrochemical Company, the model is EL-90;

Deionized water: 160 parts by weight.

The B component is isophorone diisocyanate, which is produced by Bayer Company of Germany and whose model is IPDI.

The parts by weight of each raw material in the C component filler consist of:

Green pigment: 1 part by weight, the product that adopts German BASF company to produce, the model is K8740;

Zeolite powder: 5 parts by weight, adopts the zeolite powder produced by Ningbo Jiahe New Material Technology Co., Ltd.;

Quartz powder: 20 parts by weight, adopting the 1250 mesh product produced by Guangzhou Yifeng Mining Co., Ltd.;

Deionized water: 30 parts by weight.

② Prepare the raw materials according to the weight of the raw materials.

(2) Preparation of each component

① Preparation of component A

Ⅰ. Add linseed oil, diethylene glycol, resole phenolic resin, and butyl titanate to the reaction kettle in proportions by weight, vacuumize, and pass in an inert gas for protection.

II. Raise the temperature to 220° C. to react for 2 hours, and then cool to room temperature to obtain vegetable oil-based polyol, which is discharged for use.

Ⅲ. Add 5 parts by weight of castor oil polyoxyethylene ether and 120 parts by weight of deionized water into the above-mentioned reaction kettle, stir rapidly at room temperature, and slowly add the vegetable oil-based polyol obtained in step Ⅱ during the stirring, and control it within 0.5 hours Add the vegetable oil-based polyol dropwise.

Ⅳ. Stirring was continued for 2 hours to obtain vegetable oil-based polyol emulsion.

② Component B directly adopts the model produced by German Bayer Company as IPDI product.

③ Preparation of component C

Put 1 part by weight of pigment, 5 parts by weight of zeolite powder, 20 parts by weight of quartz powder, and 30 parts by mass of deionized water into the tank, start the disperser, stir at a speed of 800 rpm for 30 minutes to disperse, and obtain a uniformly dispersed C component mixture;

④ Separately mix and disperse the components A and C.

(3) Packaging

The components A and C prepared in step (2) are packaged separately through canning and dispensing equipment.

Before coating, use the components A, B and C in a weight ratio of A:B:C=2:3:1: first add component C to component A under stirring; Then slowly add component B into the mixed component of component A and component C, stir for 5 minutes, scrape it with a steamed knife, and then use a defoaming roller for defoaming treatment, and cure at room temperature for 14 days to form a film.

Table 1 shows the test results of heat resistance and mechanical properties of the heat-resistant vegetable oil-based polyurethane floor coating prepared in Example 3 after film formation.

Embodiment 4 A preparation method of heat-resistant vegetable oil-based polyurethane floor coating, comprising the following steps:

(1) Raw material preparation

① The heat-resistant vegetable oil-based polyurethane floor coating includes three components A, B and C.

The parts by weight of each raw material in the described A component consist of:

Palm oil: 100 parts by weight; adopt the palm oil produced by Ji'an Red Apple Natural Perfume Oil Co., Ltd.;

Trimethylolpropane: 8 parts by weight, adopt the trimethylolpropane produced by Shanghai Petrochemical Company;

Rosin: 30 parts by weight, adopt the first-grade rosin produced by Wuhan Black Pegasus Chemical Raw Materials Co., Ltd.;

Lithium hydroxide: 0.7 parts by weight, adopts the lithium hydroxide produced by Shanghai Zhongli Company;

Polyoxyethylene nonylphenol ether: 5 parts by weight, adopting the product produced by Jiangsu Haian Petrochemical Company, the model is TX-10;

Deionized water: 80 parts by weight.

The B component is polymethylene polyphenylisocyanate, which is produced by American Dow Company and whose model is PAPI135C.

The parts by weight of each raw material in the C component filler consist of:

Green pigment: 4 parts by weight, the product that adopts Germany BASF company to produce, the model is K8740;

Zeolite powder: 6 parts by weight, adopts the zeolite powder produced by Ningbo Jiahe New Material Technology Co., Ltd.;

Kaolin: 27 parts by weight, using the 1250 mesh product produced by Huaian Huijiang Titanium Dioxide Co., Ltd.;

Deionized water: 60 parts by weight.

② Prepare the raw materials according to the weight of the raw materials.

(2) Preparation of each component

① Preparation of component A

1. Add palm oil, trimethylolpropane, rosin, and lithium hydroxide to the reaction kettle in proportions by weight, vacuumize, and pass in an inert gas for protection.

II. Raise the temperature to 230° C. to react for 2 hours, and then cool to room temperature to obtain vegetable oil-based polyol, which is discharged for use.

Ⅲ. Add 5 parts by weight of polyoxyethylene nonylphenol ether and 80 parts by weight of deionized water into the above reaction kettle, stir rapidly at room temperature, and slowly add the vegetable oil-based polyol obtained in step Ⅱ during the stirring, and control it at 1 Add the vegetable oil-based polyol dropwise in hours.

Ⅳ. Stirring was continued for 2 hours to obtain vegetable oil-based polyol emulsion.

② Component B directly adopts the product of model PAPI135C produced by American Dow Company.

③ Preparation of component C

Put 4 parts by weight of pigments, 6 parts by weight of zeolite powder, 27 parts by weight of kaolin, and 60 parts by weight of deionized water into the tank, start the disperser, stir for 30 minutes at a speed of 700 rpm to disperse, and obtain evenly dispersed C component mixture;

④ Separately mix and disperse the components A and C.

(3) Packaging

The components A and C prepared in step (2) are packaged separately through canning and dispensing equipment.

Before coating, use the components A, B and C in a weight ratio of A:B:C=2:2.5:1: add component C to component A under stirring; Then slowly add component B into the mixed component of component A and component C, stir for 5 minutes, scrape it with a steamed knife, and then use a defoaming roller for defoaming treatment, and cure at room temperature for 14 days to form a film.

Table 1 shows the test results of heat resistance and mechanical properties of the heat-resistant vegetable oil-based polyurethane floor coating prepared in Example 4 after film formation.

Comparative Example 1—In order to prove the heat resistance and mechanical properties of the heat-resistant vegetable oil-based polyurethane floor coatings prepared in Examples 1-4 after film formation, we designed this comparative example.

A preparation method of vegetable oil-based polyurethane floor paint, comprising the following steps:

(1) Raw material preparation

① The heat-resistant vegetable oil-based polyurethane floor coating includes three components A, B and C.

The parts by weight of each raw material in the described A component consist of:

Castor oil: 100 parts by weight, adopt the refining castor oil produced by Ji'an Red Apple Natural Perfume Oil Co., Ltd;

Glycerol: 16 parts by weight, adopt the glycerol (glycerol) produced by Shanghai Petrochemical Company;

Titanate: 0.5 parts by weight, using butyl titanate produced by Shanghai Debang Chemical Co., Ltd.;

Polyoxyethylene nonylphenol ether: 4 parts by weight, adopting the product produced by Jiangsu Haian Petrochemical Company, the model is TX-10;

Deionized water: 120 parts by weight.

The B component is diphenylmethane diisocyanate: a product of the model MDI-100 produced by Yantai Wanhua Company.

The parts by weight of each raw material in the C component filler consist of:

Green pigment: 3 parts by weight, the model that adopts Germany BASF company to produce is the product of K8740;

Zeolite powder: 8 parts by weight, adopts the zeolite powder produced by Ningbo Jiahe New Material Technology Co., Ltd.;

Kaolin: 25 parts by weight, using the 1250 mesh product produced by Huaian Huijiang Titanium Dioxide Co., Ltd.;

Deionized water: 40 parts by weight.

② Prepare the raw materials according to the weight of the raw materials.

(2) Preparation of each component

① Preparation of component A

Ⅰ. Add castor oil, glycerin, and butyl titanate to the reaction kettle in proportions by weight, vacuumize, and pass in an inert gas for protection.

II. Raise the temperature to 220° C. for 3 hours and then cool to room temperature to obtain vegetable oil-based polyol, which is discharged for use.

Ⅲ. Add 4 parts by weight of polyoxyethylene nonylphenol ether and 100 parts by weight of deionized water into the above-mentioned reaction kettle, stir rapidly at room temperature, and slowly add the vegetable oil-based polyol obtained in step Ⅱ during the stirring, and control it at 0.5 Add the vegetable oil-based polyol dropwise in hours.

Ⅳ. Stirring was continued for 2 hours to obtain vegetable oil-based polyol emulsion.

② Component B directly adopts the product of model MDI-100 produced by Yantai Wanhua Company.

③ Preparation of component C

Put 3 parts by weight of pigments, 8 parts by weight of zeolite powder, 25 parts by weight of kaolin, and 40 parts by weight of deionized water into the tank, start the disperser, stir at a speed of 500 rpm for 20 minutes to disperse, and obtain evenly dispersed C component mixture;

④ Separately mix and disperse the components A and C.

(3) Packaging

The components A and C prepared in step (2) are packaged separately through canning and dispensing equipment.

Before coating, use the A component, B component and C component in a weight ratio of A:B:C=2:2:0.7: under stirring, first add C component to A component; Then slowly add component B into the mixed component of component A and component C, stir for 5 minutes, scrape it with a steamed knife, and then use a defoaming roller for defoaming treatment, and cure it at room temperature for 14 days to form a film.

Table 1 shows the test results of heat resistance and mechanical properties of the heat-resistant vegetable oil-based polyurethane floor coating prepared in Comparative Example 1 after film formation.

Table 1. Heat-resistant vegetable oil-based polyurethane floor coatings prepared in Examples 1 to 4 and the heat resistance and mechanical performance test results of the vegetable oil-based polyurethane floor coatings prepared in Comparative Example 1 after film formation

.

From the test results in Table 1, it can be clearly seen that the heat-resistant vegetable oil-based polyurethane floor coatings prepared in Examples 1 to 4 have the same performance in "heat distortion temperature", "compressive strength" and "flexural strength" after film formation. significantly better than Comparative Example 1.

Claims (4)

1. A heat-resistant vegetable oil-based polyurethane floor coating is characterized in that it contains three components of A, B and C, The A component is a vegetable oil-based polyol emulsion, wherein the parts by weight of each raw material are composed of: Vegetable oil: 100 parts by weight, Described vegetable oil is a kind of castor oil, soybean oil, linseed oil or palm oil; Polyol: 5-20 parts by weight, Described polyhydric alcohol is aliphatic polyhydric alcohol, is a kind of of ethylene glycol, diethylene glycol, glycerol or trimethylol propane; Heat-resistant modifier: 10-30 parts by weight, The heat-resistant modifier is a compound or a low-molecular polymer having an aromatic ring or aliphatic ring structure and containing a hydroxyl group, a carboxyl group or an anhydride group; Catalyst: 0.3～1 weight part, The catalyst is a kind of titanate or lithium hydroxide; Emulsifier: 3 to 5 parts by weight, The emulsifier is one or both of polyoxyethylene nonylphenol ether, polyethylene glycol dioleate, castor oil polyoxyethylene ether; Deionized water: 60-120 parts by weight; The B component is an isocyanate containing an aromatic ring or an aliphatic ring rigid structure; The parts by weight of each raw material in the C component consist of: Pigment: 1 to 5 parts by weight; Zeolite powder: 5-10 parts by weight; Kaolin or quartz powder: 20-30 parts by weight; Deionized water: 30-60 parts by weight; The components A, B and C are used together in a weight ratio of A:B:C=2:1-3:0.5-1. 2. The heat-resistant vegetable oil-based polyurethane floor coating according to claim 1, wherein the heat-resistant modifier is one of resole phenolic resin, rosin or phthalic anhydride. 3. heat-resistant vegetable oil-based polyurethane floor coating according to claim 1, is characterized in that, described isocyanate is modified diphenylmethane diisocyanate, toluene diisocyanate trimer, isophorone diisocyanate Or a kind of polymethylene polyphenylisocyanate. 4. a preparation method of heat-resistant vegetable oil-based polyurethane floor paint as claimed in claim 1, is characterized in that, comprises the following steps: (1) Raw material preparation ①The heat-resistant vegetable oil-based polyurethane floor coating contains three components A, B, and C, The parts by weight of each raw material in the described A component consist of: Vegetable oil: 100 parts by weight; Polyol: 5-20 parts by weight; Heat-resistant modifier: 10-30 parts by weight; Catalyst: 0.3 to 1 part by weight; Emulsifier: 3 to 5 parts by weight; Deionized water: 60-120 parts by weight; The B component is an isocyanate with a rigid segment; The parts by weight of each raw material in the C component filler consist of: Pigment: 1 to 5 parts by weight; Zeolite powder: 5-10 parts by weight; Kaolin or quartz powder: 20-30 parts by weight; Deionized water: 30-60 parts by weight; ② Prepare raw materials according to the weight of raw materials; (2) Preparation of each component ① Preparation of component A Ⅰ. Add vegetable oil, polyol, heat-resistant modifier, and catalyst to the reactor according to the proportion of parts by weight, vacuumize, and pass inert gas protection; Ⅱ. Raise the temperature to 200-230°C and react for 2-3 hours, and then cool to room temperature to obtain vegetable oil-based polyol, which is discharged for use; Ⅲ. Add the emulsifier and deionized water into the above reaction kettle according to the proportion of parts by weight, stir rapidly at room temperature, and slowly add the vegetable oil-based polyol obtained in step Ⅱ dropwise while stirring, and the dropwise addition should be controlled within 0.5 to 1 hour Complete described vegetable oil-based polyol; Ⅳ. Continue to stir for 0.5 to 2 hours to obtain vegetable oil-based polyol emulsion; ② Component B directly adopts existing isocyanate products; ③ Preparation of component C Put the pigment, zeolite powder, kaolin or quartz powder, and deionized water into the tank in turn according to the weight composition of component C in step (1), start the disperser, and stir for 15 to 30 minutes at a speed of 400 to 800 rpm. Disperse in minutes to obtain a uniformly dispersed component C mixture; ④ Separately batch and disperse the A component and the C component; (3) Packaging The components A and C prepared in step (2) are packaged separately through canning and dispensing equipment.