阅读说明：本技术 一种用于洗地机轮的环保型聚氨酯弹性体的生产工艺 (Production process of environment-friendly polyurethane elastomer for ground washing machine wheel ) 是由 史春晓 史玉林 于 2021-09-15 设计创作，主要内容包括：本发明涉及一种用于洗地机轮的环保型聚氨酯弹性体的生产工艺,属于聚氨酯技术领域,生产工艺包括如下步骤：第一步、将聚酯多元醇A、扩链剂、匀泡剂、催化剂和去离子水混合,密封保存,得到第一组分；第二步、将甲苯二异氰酸酯和聚酯多元醇B混合,反应1-2h,降温出料,密封保存,得到第二组分；第三步、将第一组分、第二组分和增韧填料混合,注入模具中成型。本发明在一种用于洗地机轮的环保型聚氨酯弹性体的生产过程中,加入了一种增韧填料,该增韧填料不仅提升了弹性体的力学强度,还提高了弹性体的耐磨性,提高了其在洗地机轮中的应用效果,提高使用寿命和抓地性。(The invention relates to a production process of an environment-friendly polyurethane elastomer for a ground washing wheel, belonging to the technical field of polyurethane, and the production process comprises the following steps: firstly, mixing polyester polyol A, a chain extender, a foam stabilizer, a catalyst and deionized water, and sealing and storing to obtain a first component; secondly, mixing toluene diisocyanate and polyester polyol B, reacting for 1-2h, cooling, discharging, sealing and storing to obtain a second component; and thirdly, mixing the first component, the second component and the toughening filler, and injecting the mixture into a mold for molding. In the production process of the environment-friendly polyurethane elastomer for the ground washing machine wheel, the toughening filler is added, so that the mechanical strength of the elastomer is improved, the wear resistance of the elastomer is improved, the application effect of the elastomer in the ground washing machine wheel is improved, and the service life and the ground gripping performance are improved.)

1. A production process of an environment-friendly polyurethane elastomer for a ground washing machine wheel is characterized by comprising the following steps:

firstly, mixing polyester polyol A, a chain extender, a foam stabilizer, a catalyst and deionized water at 50-70 ℃, and sealing and storing to obtain a first component;

secondly, mixing toluene diisocyanate and polyester polyol B, reacting for 1-2h at 70-85 ℃, cooling, discharging, sealing and storing to obtain a second component;

thirdly, mixing the first component, the second component and the toughening filler at 40-60 ℃, and injecting into a mold for molding;

the toughening filler is prepared by the following steps:

step A11, adding carbon fibers into the mixed solution, heating to 75 ℃, and reacting for 2 hours; filtering after the reaction is finished, drying at 40 ℃ to constant weight, adding thionyl chloride and N, N-dimethylformamide after the drying is finished, and carrying out reflux reaction for 48 hours at 76 ℃ to obtain the acyl chloride carbon fiber;

step A12, mixing hydroxyl-terminated polybutadiene and dichloromethane, stirring and dissolving, adding sodium hydroxide at the temperature of 25 ℃ under the protection of nitrogen, stirring for 30min, then adding cyanuric chloride, keeping the temperature unchanged, and continuing stirring for 12h to obtain a modifier;

and A13, adding the obtained carbon fiber subjected to acyl chloride into N, N-dimethylformamide, adding a modifier and triethylamine, and reacting at 80 ℃ for 24 hours to obtain the toughening filler.

2. The process for producing the environmentally friendly polyurethane elastomer for a ground washing machine wheel according to claim 1, wherein the polyester polyol A is prepared by the following steps:

glutaric acid, 1, 3-propylene glycol and an additive are added into a reaction kettle with a condensing device, the reaction is carried out for 2h at 140 ℃, then the temperature is increased to 160 ℃, the reaction is continued, dibutyltin dilaurate is added when the water in the condensing device is not increased any more, the temperature is increased to 200 ℃ under the protection of nitrogen, and the reaction is carried out for 4h, so that the polyester polyol A is obtained.

3. The process for producing the environmentally friendly polyurethane elastomer for the floor washing machine wheel according to claim 1, wherein the mixed solution in the step A11 is deionized water, potassium persulfate and silver nitrate according to the dosage ratio of 1L: 0.1 mol: 0.005mol of the mixture; the dosage ratio of the carbon fiber and the mixed solution is 1 g: 10 mL; the dosage ratio of the carbon fiber, the thionyl chloride and the N, N-dimethylformamide is 3 g: 15mL of: 1 mL; the dosage ratio of hydroxyl-terminated polybutadiene, dichloromethane, sodium hydroxide and cyanuric chloride in the step A12 is 10 g: 20mL of: 1.9 g: 7mmol of the active carbon; in the step A13, the dosage ratio of the carbon acyl chloride fiber to the N, N-dimethylformamide is 1 g: 10 mL; the dosage ratio of the acyl chloride carbon fiber, the modifier and the triethylamine is 5 g: 1.5 g: 1.2 mL.

4. The process for producing the environmentally friendly polyurethane elastomer for a ground washing wheel according to claim 2, wherein the additive is prepared by the steps of:

adding acrylamide into ether, stirring for dissolving, then adding salicylaldehyde into the mixture, heating to 65 ℃, and stirring for reacting for 5 hours; then adding isopropanol-platinum, heating to 90 ℃, stirring for 8h, then adding tetramethyldisiloxane, and reacting for 24h to obtain the additive.

5. The production process of the environment-friendly polyurethane elastomer for the ground washing machine wheel according to claim 4, wherein the molar ratio of the used amount of acrylamide to the used amount of salicylaldehyde is 1: 1; the molar ratio of the used salicylaldehyde to the used tetramethyldisiloxane is 2.2: 1; the mass ratio of the salicylaldehyde to the isopropanol-platinum is 1: 0.04.

6. the production process of the environment-friendly polyurethane elastomer for the ground washing machine wheel according to claim 1, wherein the weight parts of the substances are as follows: 110 portions of polyester polyol A, 10 to 15 portions of chain extender, 0.8 to 1 portion of foam stabilizer, 1.2 to 1.4 portions of catalyst, 0.5 to 0.6 portion of deionized water, 150 portions of toluene diisocyanate, 110 portions of polyester polyol B and 20 to 30 portions of toughening filler.

7. The production process of the environment-friendly polyurethane elastomer for the ground washing machine wheel according to claim 1, wherein the chain extender is ethylene glycol, the foam stabilizer is a silicone surfactant, and the catalyst is triethylene diamine.

Technical Field

The invention belongs to the technical field of polyurethane, and particularly relates to a production process of an environment-friendly polyurethane elastomer for a ground washing machine wheel.

Background

The floor washing machine is a cleaning machine which is suitable for cleaning hard ground and simultaneously sucking and drying sewage and taking the sewage away from the site, and has the advantages of environmental protection, energy conservation, high efficiency and the like. The floor washing machine is respectively a semi-automatic floor washing machine, a full-automatic floor washing machine, a hand-push floor washing machine and a driving floor washing machine. Is mainly used for cleaning the ground of hotels, public park squares, factory workshops and other places. The commonly used raw material of the floor washing wheel is polyurethane, and the existing polyurethane tire has poor skid resistance and wear resistance and is not beneficial to daily use.

Disclosure of Invention

The invention aims to provide a production process of an environment-friendly polyurethane elastomer for a ground washing machine wheel.

The purpose of the invention can be realized by the following technical scheme:

a production process of an environment-friendly polyurethane elastomer for a ground washing wheel comprises the following steps:

firstly, mixing polyester polyol A, a chain extender, a foam stabilizer, a catalyst and deionized water at 50-70 ℃, and sealing and storing to obtain a first component;

secondly, mixing toluene diisocyanate and polyester polyol B, reacting for 1-2h at 70-85 ℃, cooling, discharging, sealing and storing to obtain a second component;

and thirdly, mixing the first component, the second component and the toughening filler at 40-60 ℃, and injecting the mixture into a mold preheated to 35-70 ℃ for molding.

The toughening filler is prepared by the following steps:

step A11, adding carbon fibers into the mixed solution, heating to 75 ℃, and reacting for 2 hours; filtering after the reaction is finished, drying at 40 ℃ to constant weight, adding thionyl chloride and N, N-dimethylformamide after the drying is finished, refluxing and reacting for 48 hours at 76 ℃, filtering after the reaction is finished, and drying at 40 ℃ to constant weight to obtain the acyl chloride carbon fiber;

step A12, mixing hydroxyl-terminated polybutadiene and dichloromethane, stirring and dissolving, adding sodium hydroxide at the temperature of 25 ℃ under the protection of nitrogen, stirring for 30min, then adding cyanuric chloride, keeping the temperature unchanged, continuing stirring for 12h, and washing with normal hexane and methanol after the reaction is finished to obtain a modifier;

and A13, adding the obtained carbon fiber subjected to acyl chloride into N, N-dimethylformamide, adding a modifier and triethylamine, reacting for 24 hours at 80 ℃, and drying and filtering after the reaction is finished to obtain the toughening filler. The preparation process of the toughening filler comprises the following steps: the method comprises the following steps of (1) taking carbon fibers as raw materials, introducing oxygen-containing groups on the surfaces of the carbon fibers through oxidation reaction, and then carrying out acyl chlorination reaction under the catalytic action of N, N-dimethylformamide to obtain acyl chlorinated carbon fibers; the end hydroxyl contained in the modifier reacts with the acyl chloride carbon fiber, so that on one hand, the roughness of the surface of the carbon fiber can be improved, the combination with a matrix is facilitated, and the overall performance of the elastomer is improved; on the other hand, unreacted hydroxyl can also react with isocyanate groups, so that the interface performance of the elastomer is improved.

Further, the mixed solution in the step A11 is deionized water, potassium persulfate and silver nitrate according to the dosage ratio of 1L: 0.1 mol: 0.005mol of the mixture; the dosage ratio of the carbon fiber and the mixed solution is 1 g: 10 mL; the dosage ratio of the carbon fiber, the thionyl chloride and the N, N-dimethylformamide is 3 g: 15mL of: 1 mL;

in the step A12, the hydroxyl value of the hydroxyl-terminated polybutadiene is 0.7mmol/g, and the dosage ratio of the hydroxyl-terminated polybutadiene, dichloromethane, sodium hydroxide and cyanuric chloride is 10 g: 20mL of: 1.9 g: 7mmol of the active carbon;

in the step A13, the dosage ratio of the carbon acyl chloride fiber to the N, N-dimethylformamide is 1 g: 10 mL; the dosage ratio of the acyl chloride carbon fiber, the modifier and the triethylamine is 5 g: 1.5 g: 1.2 mL.

Further, the polyester polyol a is prepared by the following steps:

adding glutaric acid, 1, 3-propylene glycol and an additive into a reaction kettle with a condensing device, reacting for 2 hours at 140 ℃, then heating to 160 ℃, continuing to react, adding dibutyltin dilaurate when the water in the condensing device is not increased any more, heating to 200 ℃ under the protection of nitrogen, and reacting for 4 hours to obtain polyester polyol A; the mole ratio of glutaric acid to 1, 3-propanediol is 1.5: 1, the mass ratio of glutaric acid to additives is 3: 1, the amount of dibutyltin dilaurate added was 0.15% by mass of glutaric acid.

Further, the additive is prepared by the following steps:

adding acrylamide into ether, stirring for dissolving, then adding salicylaldehyde into the mixture, heating to 65 ℃, and stirring for reacting for 5 hours; reacting amino and aldehyde groups in acrylamide, introducing double bonds, adding isopropanol-platinum, heating to 90 ℃, stirring for 8 hours, adding tetramethyldisiloxane, reacting for 24 hours, and after the reaction is finished, carrying out reduced pressure concentration to remove the solvent to obtain the additive. The double bond and the tetramethyl disiloxane are subjected to hydrosilylation to obtain the additive containing phenolic hydroxyl, and the additive also contains Si-O-Si bonds, so that the hydrophobic effect of the elastomer is improved, and the effect of the elastomer in the using process is improved.

Further, the dosage molar ratio of the acrylamide to the salicylaldehyde is 1: 1; the molar ratio of the used salicylaldehyde to the used tetramethyldisiloxane is 2.2: 1; the mass ratio of the salicylaldehyde to the isopropanol-platinum is 1: 0.04.

the polyester polyol B is prepared by the following steps:

adding glutaric acid and 1, 2-propylene glycol into a reaction kettle with a condensing device, reacting for 2h at 140 ℃, then heating to 160 ℃, continuing to react, adding dibutyltin dilaurate when the water in the condensing device is not increased any more, heating to 200 ℃ under the protection of nitrogen, and reacting for 4h to obtain polyester polyol B; wherein the mole ratio of glutaric acid to 1, 2-propanediol is 1: 1, the amount of dibutyltin dilaurate added was 0.15% by mass of glutaric acid.

Further, the weight parts of the substances are as follows: 110 portions of polyester polyol A, 10 to 15 portions of chain extender, 0.8 to 1 portion of foam stabilizer, 1.2 to 1.4 portions of catalyst, 0.5 to 0.6 portion of deionized water, 150 portions of toluene diisocyanate, 110 portions of polyester polyol B and 20 to 30 portions of toughening filler.

Furthermore, the chain extender is ethylene glycol, the foam stabilizer is an organic silicon surfactant, and the catalyst is triethylene diamine.

The invention has the beneficial effects that:

in the production process of the environment-friendly polyurethane elastomer for the ground washing machine wheel, the toughening filler is added, so that the mechanical strength of the elastomer is improved, the wear resistance of the elastomer is improved, and the application effect of the elastomer in the ground washing machine wheel is improved.

The polyester polyol A is also added, and an additive is added in the preparation process of the polyester polyol A, so that the polyester polyol A and the toughening filler have a synergistic effect in the aspects of wear resistance and mechanical properties, and the polyester polyol A and the toughening fiber have good compatibility in the subsequent preparation process and have a promotion effect on the improvement of the properties.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

The preparation of the toughening filler comprises the following steps:

step A11, adding carbon fibers into the mixed solution, heating to 75 ℃, and reacting for 2 hours; filtering after the reaction is finished, drying at 40 ℃ to constant weight, adding thionyl chloride and N, N-dimethylformamide after the drying is finished, refluxing and reacting for 48 hours at 76 ℃, filtering after the reaction is finished, and drying at 40 ℃ to constant weight to obtain the acyl chloride carbon fiber; wherein the mixed solution is deionized water, potassium persulfate and silver nitrate according to the dosage ratio of 1L: 0.1 mol: 0.005mol of the mixture; the dosage ratio of the carbon fiber and the mixed solution is 1 g: 10 mL; the dosage ratio of the carbon fiber, the thionyl chloride and the N, N-dimethylformamide is 3 g: 15mL of: 1 mL;

step A12, mixing hydroxyl-terminated polybutadiene and dichloromethane, stirring and dissolving, adding sodium hydroxide at the temperature of 25 ℃ under the protection of nitrogen, stirring for 30min, then adding cyanuric chloride, keeping the temperature unchanged, continuing stirring for 12h, and washing with normal hexane and methanol after the reaction is finished to obtain a modifier; wherein the hydroxyl value of the hydroxyl-terminated polybutadiene is 0.7mmol/g, and the dosage ratio of the hydroxyl-terminated polybutadiene, dichloromethane, sodium hydroxide and cyanuric chloride is 10 g: 20mL of: 1.9 g: 7mmol of the active carbon;

step A13, adding the obtained carbon fiber subjected to acyl chloride into N, N-dimethylformamide, adding a modifier and triethylamine, reacting for 24 hours at 80 ℃, and drying and filtering after the reaction is finished to obtain a toughening filler; wherein the dosage ratio of the carbon acyl chloride fibers to the N, N-dimethylformamide is 1 g: 10 mL; the dosage ratio of the acyl chloride carbon fiber, the modifier and the triethylamine is 5 g: 1.5 g: 1.2 mL.

Example 2

Preparation of polyester polyol A:

adding acrylamide into ether, stirring for dissolving, then adding salicylaldehyde into the mixture, heating to 65 ℃, and stirring for reacting for 5 hours; adding isopropanol-platinum, heating to 90 ℃, stirring for 8h, adding tetramethyldisiloxane, reacting for 24h, and after the reaction is finished, carrying out reduced pressure concentration to remove the solvent to obtain the additive, wherein the molar ratio of the acrylamide to the salicylaldehyde is 1: 1; the molar ratio of the used salicylaldehyde to the used tetramethyldisiloxane is 2.2: 1; the mass ratio of the salicylaldehyde to the isopropanol-platinum is 1: 0.04;

adding glutaric acid, 1, 3-propylene glycol and an additive into a reaction kettle with a condensing device, reacting for 2 hours at 140 ℃, then heating to 160 ℃, continuing to react, adding dibutyltin dilaurate when the water in the condensing device is not increased any more, heating to 200 ℃ under the protection of nitrogen, and reacting for 4 hours to obtain polyester polyol A; the mole ratio of glutaric acid to 1, 3-propanediol is 1.5: 1, the mass ratio of glutaric acid to additives is 3: 1, the amount of dibutyltin dilaurate added was 0.15% by mass of glutaric acid.

Example 3

Preparation of polyester polyol B:

adding glutaric acid and 1, 2-propylene glycol into a reaction kettle with a condensing device, reacting for 2h at 140 ℃, then heating to 160 ℃, continuing to react, adding dibutyltin dilaurate when the water in the condensing device is not increased any more, heating to 200 ℃ under the protection of nitrogen, and reacting for 4h to obtain polyester polyol B; wherein the mole ratio of glutaric acid to 1, 2-propanediol is 1: 1, the amount of dibutyltin dilaurate added was 0.15% by mass of glutaric acid.

Example 4

A production process of an environment-friendly polyurethane elastomer for a ground washing wheel comprises the following steps:

firstly, mixing polyester polyol A, a chain extender, a foam stabilizer, a catalyst and deionized water at 50 ℃, and sealing and storing to obtain a first component;

secondly, mixing toluene diisocyanate and polyester polyol B, reacting for 1h at 70 ℃, cooling, discharging, sealing and storing to obtain a second component;

and thirdly, mixing the first component, the second component and the toughening filler at 40 ℃, and injecting the mixture into a mold preheated to 35 ℃ for molding.

Wherein the weight parts of the substances are as follows: 100 parts of polyester polyol A, 10 parts of chain extender, 0.8 part of foam stabilizer, 1.2 parts of catalyst, 0.5 part of deionized water, 150 parts of toluene diisocyanate, 100 parts of polyester polyol B and 20 parts of toughening filler.

Wherein the chain extender is ethylene glycol, the foam stabilizer is an organic silicon surfactant, and the catalyst is triethylene diamine; the toughening filler was prepared for example, polyester polyol a was prepared for example 2, and polyester polyol B was prepared for example 3.

Example 5

A production process of an environment-friendly polyurethane elastomer for a ground washing wheel comprises the following steps:

firstly, mixing polyester polyol A, a chain extender, a foam stabilizer, a catalyst and deionized water at 60 ℃, and sealing and storing to obtain a first component;

secondly, mixing toluene diisocyanate and polyester polyol B, reacting for 2 hours at 75 ℃, cooling, discharging, sealing and storing to obtain a second component;

and thirdly, mixing the first component, the second component and the toughening filler at 50 ℃, and injecting the mixture into a mold preheated to 40 ℃ for molding.

Wherein the weight parts of the substances are as follows: 105 parts of polyester polyol A, 12 parts of chain extender, 0.9 part of foam stabilizer, 1.3 parts of catalyst, 0.5 part of deionized water, 155 parts of toluene diisocyanate, 105 parts of polyester polyol B and 25 parts of toughening filler.

Wherein the chain extender is ethylene glycol, the foam stabilizer is an organic silicon surfactant, and the catalyst is triethylene diamine; the toughening filler was prepared for example, polyester polyol a was prepared for example 2, and polyester polyol B was prepared for example 3.

Example 6

A production process of an environment-friendly polyurethane elastomer for a ground washing wheel comprises the following steps:

firstly, mixing polyester polyol A, a chain extender, a foam stabilizer, a catalyst and deionized water at 70 ℃, and sealing and storing to obtain a first component;

secondly, mixing toluene diisocyanate and polyester polyol B, reacting for 2 hours at 85 ℃, cooling, discharging, sealing and storing to obtain a second component;

and thirdly, mixing the first component, the second component and the toughening filler at the temperature of 60 ℃, and injecting the mixture into a mold preheated to 70 ℃ for molding.

Wherein the weight parts of the substances are as follows: 110 parts of polyester polyol A, 15 parts of chain extender, 1 part of foam stabilizer, 1.4 parts of catalyst, 0.6 part of deionized water, 160 parts of toluene diisocyanate, 110 parts of polyester polyol B and 30 parts of toughening filler.

Wherein the chain extender is ethylene glycol, the foam stabilizer is an organic silicon surfactant, and the catalyst is triethylene diamine; the toughening filler was prepared for example, polyester polyol a was prepared for example 2, and polyester polyol B was prepared for example 3.

Comparative example 1

Compared with the embodiment 5, the toughening filler is not added, and the rest raw materials and the preparation process are kept unchanged.

Comparative example 2

Compared with the example 2, no modifier is added, and the rest raw materials and the preparation process are kept unchanged.

Comparative example 3

In comparison with example 5, the polyester polyol A was replaced by the sample prepared in comparative example 2, and the remaining raw materials and preparation process were maintained.

The samples prepared in examples 4 to 6 and comparative examples 1 and 3 were subjected to the test; using MH-20 friction wear testing machine to measure the sliding friction coefficient on the cement ground, and expressing the test result by the weight loss of the grinding wheel after 1000 times of rotation;

the test method of the test item comprises the following steps: tensile strength and elongation at break according to standard GB/T528-1998;

the test results are shown in table 1 below:

TABLE 1

As can be seen from the above table 1, the environment-friendly polyurethane elastomer for the floor washing machine wheel, which is prepared by the invention, has good wear resistance and good mechanical properties.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing is illustrative and explanatory only and is not intended to be exhaustive or to limit the invention to the precise embodiments described, and various modifications, additions, and substitutions may be made by those skilled in the art without departing from the scope of the invention or exceeding the scope of the claims.