Polyester polyol, quick-repair floor material and preparation method thereof

Abstract

The invention discloses a polyester polyol, a quick-repair floor material and a preparation method thereof, and belongs to the field of novel floor building materials. The floor material comprises the following components by mass percentage: 32-36 parts of polyester-modified castor oil, 2-8 parts of polyester polyol, 48-52 parts of quartz powder, 8-10 parts of molecular sieves, and 1-3 parts of auxiliary agents, wherein the polyester polyol is obtained by polycondensation of pentaerythritol and adipic acid under a high-temperature vacuum environment, the polyester polyol is a polyester with a high hydroxyl value, has 6 hydroxyl groups, has good compatibility with polyester-modified castor oil, provides 6 cross-linking points for polyurethane floor, can rapidly increase the cross-linking degree of the reaction, significantly shortens the floor gelling time, satisfies the construction time requirement of quick repair, and has high mechanical strength.

Description

Technical Field

[0001] The invention belongs to the field of novel floor building materials, and more specifically, relates to a polyester polyol, a quick-repair floor material and a preparation method thereof. Background Art

[0002] During the use of floor materials, it is inevitable that they will be damaged and cracked and need to be repaired. In some garages or ramps with heavy traffic, the repair construction window is extremely short, and conventional floor materials are difficult to meet the requirements of rapid curing in terms of surface drying and actual drying. Existing traditional epoxy, polyurethane and other systems cure slowly, with surface drying in 4 hours and actual drying in more than 8 hours, which is very unfavorable for construction and on-site maintenance. Therefore, there is a great market for developing a floor material that can cure quickly and can be used in less than 2 hours.

[0003] Patent CN105273602A discloses a two-component low-temperature fast-drying floor material, including a colored paint and a curing agent, the mass ratio of the colored paint to the curing agent is 2:1, and the colored paint is made of the following raw materials in parts by weight: 30-50 parts of mixed polyether polyester polyol, 3-5 parts of xylene, 35-45 parts of calcium carbonate, 10-15 parts of titanium dioxide, and 1-4 parts of additives. The invention uses a mixed polyether polyester polyol with different reaction speeds as a film-forming substance, adds pigments, additives and a small amount of solvent, and then disperses and grinds it to make a simple and easy-to-apply two-component polyurethane thin-coat low-temperature fast-drying floor coating. However, it is an optimization and adjustment of the IPDI curing agent, which is used to improve the toughness of the polyurethane film-forming material, reduce brittleness, and improve the hardness of HDI at the same time. The reaction activity of the mixed polyether polyester polyol is low.

[0004] Patent CN118852581A discloses a modified IPDI curing agent, a preparation method and its application. The modification of the modified IPDI curing agent includes the following steps: using IPDI trimer to react with 12-hydroxystearic acid methyl ester to obtain a modified IPDI trimer curing agent. The modified IPDI trimer curing agent is used in combination with HDI curing agent as a curing agent component of a two-component polyurethane floor finish varnish. The curing agent has good compatibility after film formation, and has the characteristics of high hardness, quick drying, high adhesion and long construction period. It is very suitable for floor finishes with weather resistance requirements. It uses a prepolymer of polyether polyester polyol and isocyanate to cure into a film, but polyether polyester polyol is extremely difficult to react without a catalyst, and even under high temperature conditions, the reaction activity is extremely low, resulting in its curing time cannot be effectively shortened. Summary of the invention

[0005] 1. Problem to be solved

[0006] In view of the problem that the existing floor materials have a long curing time, the first object of the present invention is to provide a polyester polyol;

[0007] The second object of the present invention is to provide a method for preparing the above polyester polyol;

[0008] The third object of the present invention is to provide a fast repair floor material, which uses polyester polyol as a core material and meets the requirement of being open to traffic after 2 hours of construction;

[0009] The fourth object of the present invention is to provide a method for preparing the above-mentioned rapid repair floor material.

[0010] 2. Technical solution

[0011] In order to solve the above problems, the technical solution adopted by the present invention is as follows:

[0012] This patent is based on traditional solvent-free polyurethane flooring. By introducing fast-curing polyester polyols compounded with polyester-modified castor oil and combining them with quartz sand, a high-toughness, high-strength fast-repair flooring material is obtained.

[0013] The first object of the present invention is to provide a fast-curing polyester polyol, the structural formula of which is:

[0014]

[0015] The second object of the present invention is to provide a method for preparing the above polyester polyol, which specifically comprises the steps of:

[0016] It is prepared by polycondensation of pentaerythritol and adipic acid under high temperature vacuum environment, wherein the reaction temperature is 160-220°C and the reaction time is 8-15h to obtain polyester polyol.

[0017] After the reaction is completed, propylene glycol diacetate is added to dissolve and dilute the polyester polyol, and the amount of propylene glycol diacetate added is equal to the sum of the masses of pentaerythritol and adipic acid to obtain a polyester polyol solution.

[0018] The third object of the present invention is to provide a rapid repair floor material, which includes the following components in percentage by mass: 32-36 parts of polyester modified castor oil, 2-8 parts of polyester polyol, 48-52 parts of quartz powder, 8-10 parts of molecular sieve, and 1-3 parts of additives.

[0019] Preferably, the floor material comprises: 34 parts of polyester-modified castor oil, 5 parts of polyester polyol, 50 parts of quartz powder, 10 parts of molecular sieves, and 1 part of additives.

[0020] Furthermore, the auxiliary agent includes 0.3%-0.5% of a leveling agent, 0.3%-0.5% of a dispersant and 0.2%-0.4% of a defoaming agent.

[0021] Preferably, the auxiliary agent includes 0.4% of leveling agent, 0.4% of dispersant and 0.2% of defoaming agent.

[0022] Furthermore, the leveling agent is a fluorine-containing acrylate; the dispersant is a modified polyester; and the defoaming agent is a modified polysiloxane.

[0023] The fourth object of the present invention is to provide a method for preparing the above-mentioned rapid repair floor material, which specifically comprises the steps of:

[0024] The polyester modified castor oil, polyester polyol, quartz powder, molecular sieve and additives are mixed in proportion and cured to obtain the floor material.

[0025] The fast-curing polyester polyol resin is a high-hydroxyl polyester with 6 hydroxyl groups, providing 6 cross-linking points for the polyurethane floor, which can quickly increase the cross-linking degree of the reaction, and because of the rapid heat release of the rapid cross-linking, the gel time of the floor can be significantly shortened, and rapid curing and hardening can be achieved in 30-60 minutes; an extremely fast gel speed can be obtained to meet the construction time requirements of rapid repairs. The polyester polyol is a multi-branched structure with high mechanical strength and good compatibility with polyester-modified castor oil. Furthermore, quartz sand is added to the floor material, and the Shore hardness of the final floor material is 80-90D.

[0026] The floor material of the present invention can react quickly at low temperature without adding a catalyst and obtain high hardness. After the synthetic polyester polyol with multiple cross-linking points reacts with MDI to release heat, the castor oil polyester polyol is accelerated to continue to cross-link quickly with MDI.

[0027] The obtained floor material is suitable for floor repair sites with heavy traffic. Through rapid repair, it can meet the requirement of traffic opening after 2 hours of construction, solving the problem of long curing time of existing floor materials.

[0028] 3. Beneficial effects

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] (1) The present invention adds a fast-curing polyester polyol, which is a polyester with a high hydroxyl value and has 6 hydroxyl groups. It has good compatibility with polyester-modified castor oil and provides 6 cross-linking points for the polyurethane floor, which can quickly increase the cross-linking degree of the reaction, significantly shorten the gel time of the floor, and meet the construction time requirements of rapid repair;

[0031] (2) The present invention adds a fast-curing polyester polyol, which has a multi-branched structure and has high mechanical strength;

[0032] (3) The present invention uses fast-curing polyester polyols compounded with polyester-modified castor oil and quartz sand to obtain a floor material with high toughness and high strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments, but it should be understood that these drawings are designed only for explanation purposes and are not intended to limit the scope of the present invention. In addition, unless otherwise specified, these drawings are intended only to conceptually illustrate the structural configurations described herein and are not necessarily drawn to scale.

[0034] Figure 1 It is the structural formula of polyester polyol. DETAILED DESCRIPTION

[0035] The following detailed description of exemplary embodiments of the present invention refers to the accompanying drawings, which form a part of the description, and in which exemplary embodiments of the present invention that can be implemented are shown as examples. Although these exemplary embodiments are described in sufficient detail to enable those skilled in the art to implement the present invention, it should be understood that other embodiments can be implemented and various changes can be made to the present invention without departing from the spirit and scope of the present invention. The following more detailed description of the embodiments of the present invention is not intended to limit the scope of the claimed invention, but is only for the purpose of illustrating and not limiting the description of the characteristics and features of the present invention, so as to propose the best mode for performing the present invention and to enable those skilled in the art to implement the present invention. Therefore, the scope of the present invention is limited only by the appended claims.

[0036] The present invention is based on the curing system characteristics of traditional solvent-free polyurethane flooring. By introducing fast-curing polyester polyols, compounding polyester-modified castor oil, and matching quartz sand, a fast-repairing flooring material with high toughness and high strength is prepared. In particular, the polyester polyol that can achieve fast curing is a high-hydroxyl value compound, has high mechanical strength, and has good compatibility with polyester-modified castor oil. The high-hydroxyl value compound should be a multi-functional structure, which can obtain an extremely fast gel speed and meet the construction time requirements of fast repair. Based on this, the present invention prepares a fast-curing polyester polyol by polycondensation of pentaerythritol and adipic acid under a high-temperature vacuum environment. A fast-repairing flooring material is prepared using this as the core material, which meets the requirements of opening to traffic after 2 hours of construction.

[0037] The present invention is suitable for parking lot floor repair sites with heavy traffic. Through rapid repair, the requirement of traffic opening after 2 hours of construction can be met, which solves the problem of long waiting time for curing of existing floor materials and minimizes the impact on normal traffic of vehicles.

[0038] Wherein, the polyester-modified castor oil in the embodiment of the present invention is the commercially available A31 model of Shanghai Jingri;

[0039] The additives include leveling agents, dispersants and defoamers:

[0040] The leveling agent is a fluorinated acrylate, Chongqing Haikemu HYCM-1601;

[0041] The dispersant is a modified polyester, Chongqing Haikemu HYCM-5035;

[0042] The defoaming agent is polysiloxane modified type, Chongqing Haikemu HYCM-369.

[0043] Example 1

[0044] Example 1 discloses a method for preparing polyester polyols, which specifically comprises the steps of:

[0045] It is prepared by polycondensation of pentaerythritol and adipic acid under high temperature vacuum environment, wherein the reaction temperature is 180°C, the catalyst is dibutyltin dilaurate, the addition amount is 0.2wt%, the reaction time is 12h, and the ratio of pentaerythritol to adipic acid is 275:146; after the reaction, propylene glycol diacetate equal to the sum of the mass of pentaerythritol and adipic acid is added to obtain a solution containing polyester polyol.

[0046] Example 2

[0047] The rapid floor repair material of this embodiment includes the following components in percentage by mass: 34 parts of polyester-modified castor oil, 5 parts of polyester polyol, 50 parts of quartz powder, 10 parts of molecular sieves, and 1 part of an additive.

[0048] The additives include 0.4% leveling agent, 0.4% dispersant and 0.2% defoamer:

[0049] The leveling agent is a fluorine-containing acrylate; the dispersant is a modified polyester; and the defoaming agent is a modified polysiloxane.

[0050] The above floor material was cured at 28°C for 50 minutes, and the hardness of the obtained floor material was 65D. After 24 hours, the hardness was 85D.

[0051] Example 3

[0052] A quick-repair floor material in this embodiment is different from that in Embodiment 2 in that the curing temperature is 18° C. The quick-repair floor material comprises the following components in percentage by mass: 34 parts of polyester-modified castor oil, 5 parts of polyester polyol, 50 parts of quartz powder, 10 parts of molecular sieves, and 1 part of an additive.

[0053] The additives include 0.4% leveling agent, 0.4% dispersant and 0.2% defoamer:

[0054] The leveling agent is a fluorine-containing acrylate; the dispersant is a modified polyester; and the defoaming agent is a modified polysiloxane.

[0055] The above floor material was cured at 18°C ​​for 50 minutes, and the hardness of the obtained floor material was 69D. After 24 hours, the hardness was 90D.

[0056] Example 4

[0057] A rapid floor repair material of this embodiment includes the following components by mass percentage: 32 parts of polyester-modified castor oil, 7 parts of polyester polyol, 50 parts of quartz powder, 10 parts of molecular sieves, and 1 part of an additive.

[0058] The additives include 0.4% leveling agent, 0.4% dispersant and 0.2% defoamer:

[0059] The leveling agent is a fluorine-containing acrylate; the dispersant is a modified polyester; and the defoaming agent is a modified polysiloxane.

[0060] The above floor material was cured at 18°C ​​for 50 minutes, and the hardness of the obtained floor material was 67D. After 24 hours, the hardness was 89D.

[0061] Comparative Example 1

[0062] The quick-repair floor material of this comparative example is different from Example 1 in that it does not contain polyester polyol, and the components of the floor material include, by mass percentage: 39 parts of polyester-modified castor oil, 50 parts of quartz powder, 10 parts of molecular sieves, and 1 part of an additive.

[0063] The additives include 0.4% leveling agent, 0.4% dispersant and 0.2% defoamer:

[0064] The leveling agent is a fluorine-containing acrylate; the dispersant is a modified polyester; and the defoaming agent is a modified polysiloxane.

[0065] The above floor material was cured at 28°C for 200 minutes, and the hardness of the obtained floor material was 45D. After 24 hours, the hardness was 55D.

[0066] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope involved in the present application is not limited to the technical solution formed by a specific combination of the above-mentioned technical features, but should also cover other technical solutions formed by any combination of the above-mentioned technical features or their equivalent features without departing from the inventive concept, such as a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features with similar functions disclosed in this application.

[0067] Except for the technical features described in the specification, the remaining technical features are known technologies to those skilled in the art. In order to highlight the innovative features of the present invention, the remaining technical features will not be described here in detail.

Claims

1. A polyester polyol used in floor materials, characterized in that: The structural formula is:

2. A method for preparing the polyester polyol according to claim 1, characterized in that: The specific steps include: It is prepared by polycondensation of pentaerythritol and adipic acid under high temperature vacuum environment, wherein the reaction temperature is 160-220°C and the reaction time is 8-15h to obtain polyester polyol.

3. The method for preparing polyester polyol according to claim 2, characterized in that: A catalyst is added during the reaction, wherein the catalyst is an organic tin catalyst, the amount of the catalyst added is 0.1-0.5wt%, and the ratio of pentaerythritol to adipic acid is 275:

146.

4. The method for preparing polyester polyol according to claim 2, characterized in that: After the reaction is completed, a diluent is added, wherein the diluent is propylene glycol diacetate.

5. A quick repair floor material, characterized in that: The components included are calculated by mass percentage as follows: 32-36 parts of polyester modified castor oil, 2-8 parts of polyester polyol, 48-52 parts of quartz powder, 8-10 parts of molecular sieve, 1-3 parts of auxiliary agent, wherein the polyester polyol is the polyester polyol as claimed in claim 1; or The polyester polyol prepared by the method according to any one of claims 2 to 4, The structural formula of the polyester polyol is:

6. The rapid repair floor material according to claim 5, characterized in that: The auxiliary agent comprises 0.3%-0.5% of a leveling agent, 0.3%-0.5% of a dispersant and 0.2%-0.4% of a defoaming agent.

7. The rapid repair floor material according to claim 6, characterized in that: The leveling agent is a fluorine-containing acrylate; the dispersant is a modified polyester; and the defoaming agent is a modified polysiloxane.

8. The rapid repair floor material according to claim 7, characterized in that: After the floor material is cured for 24 hours, the Shore hardness is 80-90D.

9. A method for preparing the rapid repair floor material according to any one of claims 5 to 8, characterized in that: The polyester modified castor oil, polyester polyol, quartz powder, molecular sieve and additives are mixed in proportion and cured to obtain the floor material.

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