Thixotropic unsaturated polyester resin having good storage stability and method for preparing the same

Abstract

The application discloses a thixotropic unsaturated polyester resin with good storage stability and a preparation method thereof, and belongs to the technical field of unsaturated resins. The raw material is composed of the following components in parts by weight: 95-99 parts of unsaturated polyester resin, 0.475-0.693 parts of fumed silica, 0.024-0.0624 parts of a thixotropic additive, 0.006-0.011 parts of a polymerization inhibitor, 0.029-0.0832 parts of an anti-settling agent, 0.92-1.61 parts of a defoaming agent and 20-35 parts of a crosslinking agent. The method ensures uniform dispersion of the components in the resin system by adding and mixing the components step by step. The step-by-step adding mode can effectively avoid mutual interference between the components, and ensure that each additive can fully play its role. The application improves the stability of the system at high temperature and room temperature, and avoids performance reduction of the resin in long-term storage or long-distance transportation.

Description

TECHNICAL FIELD

[0001] The present application relates to a thixotropic unsaturated polyester resin with good storage stability and a preparation method thereof, and belongs to the technical field of unsaturated resins. BACKGROUND

[0002] Thixotropic resin is a special resin with pseudoplastic flow characteristics. When subjected to external forces such as vibration and shear, the network structure of the system is destroyed, the viscosity is reduced, and the fluidity is enhanced. Once the external force is reduced or stopped, the system is in a static state, the viscosity increases, and the structural stability is restored. The whole process is reversible. This unique rheological property makes thixotropic resin widely used in many fields, which is of great significance.

[0003] For example, in the fields of infrastructure engineering, shipbuilding, construction, and coatings. In shipbuilding, thixotropic resin is widely used in hand lay-up process to manufacture hulls, decks and other components. The thixotropy of thixotropic resin has the characteristics of anti-sagging in hand lay-up process, maintains good fluidity during construction, facilitates uniform application, enables the resin to well infiltrate the fiber material, ensures good bonding between the fiber and the resin, improves the overall performance of the composite material, and has high viscosity in a static state, effectively preventing the sagging of the resin on vertical or inclined surfaces, ensuring uniform and smooth coating, and improving construction quality and efficiency. In the process of manufacturing architectural models, thixotropic resin is more conducive to uniform application on complex shapes, making the model more accurate and beautiful.

[0004] The existing thixotropic unsaturated polyester resin on the market all have the problem of poor storage stability. Especially in high temperature environment, the resin is more prone to stratification and sedimentation, the thixotropic effect is greatly reduced, which seriously affects the performance of the resin, the use effect is greatly discounted, and more losses are caused to the factory.

[0005] There are few designs in the prior art that improve the stability of thixotropic unsaturated polyester resin. Patent 200810235455.6 discloses an unsaturated polyester resin for coating. ED-33 conductive additives, isopropyl alcohol additives and thixotropic agents are added to the unsaturated polyester resin. The thixotropic agent is selected from T40 type fumed silica, and a thixotropic resin with high gloss and anti-sagging effect is prepared by high-speed dispersion of a stirrer. However, the patent does not mention the stability problem of the thixotropic resin.

[0006] The thixotropic unsaturated polyester resin prepared by the prior art cannot ensure the stability during long-term storage and transportation. Although the product has good performance in the initial stage, it cannot maintain the thixotropic performance for a long time. After being stored for a period of time, the thixotropic effect of the resin is seriously reduced, and the viscosity and other parameters deviate, which greatly limits its application. Therefore, there is an urgent need to develop a thixotropic unsaturated polyester resin with good storage stability. SUMMARY

[0007] The technical problem solved by the present application is to overcome the shortcomings of the prior art and provide a thixotropic unsaturated polyester resin with low cost, simple preparation process and good storage stability and a preparation method thereof.

[0008] The technical scheme adopted by the present application to solve the technical problem is: a thixotropic unsaturated polyester resin with good storage stability, the raw material weight parts composition comprising: 95-99 parts of unsaturated polyester resin, 0.475-0.693 parts of fumed silica, 0.024-0.0624 parts of thixotropic auxiliary agent, 0.006-0.011 parts of polymerization inhibitor, 0.029-0.0832 parts of anti-settling agent, 0.92-1.61 parts of defoaming agent, and 20-35 parts of crosslinking agent.

[0009] The present application realizes the good stability of the thixotropic unsaturated polyester resin in long-term storage and transportation by reasonably proportioning the raw materials such as unsaturated polyester resin, fumed silica, thixotropic auxiliary agent, polymerization inhibitor, anti-settling agent, defoaming agent and crosslinking agent. The fumed silica as a thixotropic agent can effectively improve the thixotropic performance of the resin, so that its viscosity decreases and flowability enhances when subjected to external force, and its viscosity increases and structural stability recovers in a static state. At the same time, the addition of the anti-settling agent and the polymerization inhibitor can effectively prevent the resin from stratifying and settling at high temperature, avoiding a significant decrease in the thixotropic effect. In addition, the scheme further improves the comprehensive performance of the resin by adding the defoaming agent and optimizing the amount of the crosslinking agent.

[0010] Preferably, the raw material weight parts composition of the thixotropic unsaturated polyester resin comprises: 95.8-98.1 parts of unsaturated polyester resin, 0.48-0.63 parts of fumed silica, 0.029-0.054 parts of thixotropic auxiliary agent, 0.009-0.01 parts of polymerization inhibitor, 0.03-0.054 parts of anti-settling agent, 1.1-1.15 parts of defoaming agent, and 24-30 parts of crosslinking agent. The optimized proportioning scheme significantly improves the storage stability and the comprehensive performance after curing of the resin while ensuring the thixotropic performance and construction convenience of the resin, making it more suitable for long-term storage and transportation.

[0011] Preferably, in the composition of the thixotropic unsaturated polyester resin, the unsaturated polyester resin is an ortho-phthalate type unsaturated polyester resin. The ortho-phthalate type unsaturated polyester resin, such as phthalic acid-maleic anhydride-propylene glycol copolymer resin and phthalic acid-maleic anhydride-ethylene glycol copolymer resin, has good mechanical properties and heat resistance, and can remain stable in high temperature and corrosive environment. This characteristic makes the thixotropic resin not prone to delamination and sedimentation during long-term storage and use, thereby significantly improving the storage stability. The ortho-phthalate type resin contains benzene rings in its molecular structure, which endows it with higher strength and stability, and can further enhance the thixotropic properties and sag resistance effect. Combined with fumed silica, thixotropic additives, polymerization inhibitors and anti-settling agents, the ortho-phthalate type resin can better exert its comprehensive performance, further optimize the thixotropic effect and storage stability, and make it more suitable for long-term storage and wide application.

[0012] Preferably, in the composition of the thixotropic unsaturated polyester resin, the fumed silica is hydrophilic fumed silica A200. As a thixotropic agent, hydrophilic fumed silica A200 has a high specific surface area (200±25 m² / g) and a nanoscale particle size (primary particle size about 12 nm), and can form a stable three-dimensional network structure in the resin system, thereby significantly enhancing the thixotropic properties. This structure makes the resin viscosity decrease and flowability enhance when subjected to external force, and the viscosity restores in the static state, effectively preventing sagging. At the same time, the hydrophilicity of A200 makes it well dispersed in the unsaturated polyester resin, which can uniformly interact with the resin matrix, further improving the stability and thixotropic effect of the system.

[0013] Preferably, in the composition of the thixotropic unsaturated polyester resin, the thixotropic additive is UP-46. UP-46 is a high molecular polymer thixotropic additive, which, in combination with hydrophilic fumed silica A200, can establish an efficient thixotropic effect.

[0014] Preferably, in the composition of the thixotropic unsaturated polyester resin, the polymerization inhibitor is hydroquinone, and the crosslinking agent is styrene. By combining the properties of hydroquinone and styrene, the thixotropic unsaturated polyester resin can not only ensure the storage stability of the thixotropic unsaturated polyester resin, but also improve its construction performance and comprehensive performance after curing. In addition to hydroquinone, other phenolic compounds such as p-hydroxyanisole, o-dihydroxybenzene or m-dihydroxybenzene can also be selected as the polymerization inhibitor. Methyl methacrylate, dipropylene glycol phthalate and vinyl toluene can also be used as substitutes for the crosslinking agent of the present application, which can form a stable crosslinking network during the curing process.

[0015] Preferably, in the composition of the thixotropic unsaturated polyester resin, the anti-settling agent is a fatty alcohol polyoxyethylene ether, and the defoaming agent is HM2155. HM2155 is a modified polyether silicone compound. Its molecular structure contains many active groups, which can rapidly diffuse in the system and reduce the surface tension of the liquid, destroying the stability of the foam.

[0016] Preferably, in the composition of the thixotropic unsaturated polyester resin, the addition ratio of the thixotropic aid is 5wt%-9wt% of fumed silica, and the addition ratio of the anti-settling agent is 6wt%-12wt% of fumed silica. Controlling the ratio of the addition of the thixotropic aid and fumed silica can further enhance the stability of this network structure, so that the viscosity of the resin decreases and the flowability enhances when subjected to external force, and the viscosity recovers in a static state, effectively preventing the sagging phenomenon. Controlling the ratio of the anti-settling agent and fumed silica can significantly improve the anti-settling ability of the resin, ensuring that no delamination or precipitation occurs during long-term storage, and further improving the storage stability.

[0017] A preparation method of the thixotropic unsaturated polyester resin with good storage stability, comprising the following steps:

[0018] (1) The unsaturated polyester resin, thixotropic aid, and anti-settling agent are mixed according to the feeding ratio, and stirred uniformly using a high-speed disperser.

[0019] (2) Fumed silica is added, and high-speed stirring is performed using a high-speed disperser to ensure that the fumed silica is fully and uniformly dispersed in the resin. The mixture is poured into a grinder and ground to a fineness of <10μm.

[0020] (3) Finally, the polymerization inhibitor, crosslinking agent, and defoaming agent are sequentially added to the system, and stirred and mixed uniformly to obtain the thixotropic unsaturated polyester resin with good storage stability.

[0021] The method ensures uniform dispersion of each component in the resin system by adding and mixing each component step by step. In the first step, the unsaturated polyester resin is pre-mixed with the thixotropic aid and the anti-settling agent, and stirred uniformly using a high-speed disperser, which can effectively promote the preliminary dispersion of the thixotropic aid and the anti-settling agent in the resin, laying a foundation for the subsequent steps. In the second step, the fumed silica is added and then stirred at high speed, and ground to a fineness of less than 10 μm using a grinder, which can further ensure uniform distribution of the fumed silica in the resin, avoid uneven thixotropic properties or local high viscosity caused by agglomeration of fumed silica particles, and at the same time, the fineness of less than 10 μm after grinding can significantly improve the thixotropic properties and anti-settling properties of the resin, ensuring good flowability and anti-sagging effect during construction. Finally, the polymerization inhibitor, crosslinking agent and defoaming agent are added in the system in turn and stirred and mixed uniformly. This step-by-step addition method can effectively avoid mutual interference between components, ensuring that each additive can fully play its role. For example, the polymerization inhibitor can effectively prevent the self-polymerization reaction of the resin during storage, prolonging the storage period of the resin; the addition of the crosslinking agent can improve the mechanical properties and chemical resistance of the resin after curing; the addition of the defoaming agent can effectively reduce the air bubbles generated during stirring and construction of the resin, improving the surface quality and construction effect of the resin.

[0022] Preferably, in the preparation method of the thixotropic unsaturated polyester resin, the stirring speed in step (1) is 600 rpm / min to 900 rpm / min, and the stirring time is 30 min to 50 min; the stirring speed in step (2) is 500 rpm / min to 2000 rpm / min, and the stirring time is 40 min to 70 min; the stirring speed in step (3) is 300 rpm / min to 600 rpm / min, and the stirring time is 20 min to 40 min.

[0023] The setting parameter range of stirring in step (1) can effectively promote the uniform mixing of the unsaturated polyester resin and the thixotropic agent and the anti-settling agent, avoid local overheating or excessive shearing of components caused by too fast or too long stirring speed, and thus ensure the uniform distribution of the thixotropic agent and the anti-settling agent in the resin, providing a good foundation for the subsequent steps. The setting parameter range of stirring in step (2) can ensure that the fumed silica is fully and uniformly dispersed in the resin. The fumed silica has a high specific surface area and a nanoscale particle size, and is prone to agglomeration. However, through high-speed stirring and appropriate time control, the agglomeration phenomenon can be effectively broken, and the fumed silica can be uniformly distributed in the resin. At the same time, the higher stirring speed and longer stirring time can further enhance the thixotropy and anti-settling ability of the resin, ensuring good flowability and anti-sagging effect during construction. Finally, the stirring speed in step (3) is 300 rpm / min to 600 rpm / min, and the stirring time is 20 min to 40 min. This relatively low stirring speed and short time can avoid excessive disturbance to the already dispersed system, while ensuring that the polymerization inhibitor, crosslinking agent and defoaming agent are uniformly mixed into the resin system. This mild stirring condition can effectively prevent the generation of bubbles caused by too fast stirring, while ensuring that each additive fully plays its function, further improving the storage stability and construction performance of the resin.

[0024] The technical solutions of the present application are further described as follows:

[0025] The selection of the thixotropic agent is important in the preparation of thixotropic fluid. Thixotropic agents with good thixotropy include organic bentonite, fumed silica, polyurethane, polyamide, modified polyurea, etc. However, due to different mechanisms and characteristics of thixotropy, most of them are not suitable for unsaturated polyester resin systems and cannot achieve good results. In terms of thickening, thixotropy and anti-settling effect, organic bentonite and fumed silica are the best, but the color of bentonite is relatively deep, which has a great influence on the color of the thixotropic resin and is greatly limited in practical application. Fumed silica is the most widely used in the current market. Fumed silica is divided into hydrophilic and hydrophobic types. The thixotropy of hydrophobic fumed silica is slightly better after hydrophobic surface treatment, and it is relatively more stable in polar or non-polar resins, but it is difficult to fully disperse and has high requirements for the process, and the price is generally several times that of hydrophilic fumed silica. Compared with hydrophilic fumed silica, the overall cost performance of fumed silica is high and it is relatively easy to disperse, but it has the problem of poor stability, so an effective additive is needed to solve this problem.

[0026] The surface of hydrophilic fumed silica contains a large number of silicon hydroxyl groups (Si-OH), and the hydroxyl oxygen of fatty alcohol polyoxyethylene ether can form strong hydrogen bonds with fumed silica, establishing a more stable three-dimensional network structure, preventing fumed silica from settling and precipitating, and enhancing stability.

[0027] Compared with the prior art, the present application has the beneficial effects that:

[0028] 1、The present application introduces a certain amount of anti-settling agent fatty alcohol polyoxyethylene ether into the thixotropic unsaturated polyester resin, and matches the appropriate hydrophilic fumed silica A200, so that a more stable network structure is generated between the two, so as to improve the stability of the system at high temperature and room temperature, avoid the performance reduction of the resin in long-term storage or long-distance transportation, affect the use effect, and increase the cost of loss.

[0029] 2、The preparation method of the present application can not only ensure the sufficient and uniform dispersion of the fumed silica in the system and obtain high-quality thixotropic effect, but also can play a greater role of the anti-settling agent, and ensure the performance stability of the product. DETAILED DESCRIPTION

[0030] The present application will be described in detail by examples. It should be understood that the following examples are only used to further explain and illustrate the content of the present application, and are not used to limit the present application.

[0031] The chemical additives used in the examples and comparative examples of the present application are all commercially available, and the specific information is as follows: unsaturated polyester resin: ortho-phthalate unsaturated polyester resin (phthalic acid-maleic anhydride-propylene glycol copolymer resin), purchased from Shandong Wanglin New Material Co., Ltd.; fumed silica: A200, purchased from Qingdao Haibo Chemical Product Co., Ltd.; defoaming agent HM2155 and thixotropic additive UP-46, purchased from Taizhou Tianhe Chemical Co., Ltd.; hydroquinone, purchased from Guangzhou Yuan Plastic Chemical Technology Development Co., Ltd.; fatty alcohol polyoxyethylene ether, purchased from Shanghai Maikelin Biochemical Technology Co., Ltd.; styrene, purchased from Beijing Huihai Petroleum Chemical Co., Ltd.

[0032] Example 1

[0033] A thixotropic unsaturated polyester resin with good storage stability, the raw materials are the following components in parts by weight: ortho-phthalate unsaturated polyester resin 97 parts, A200 0.59 parts, UP-46 0.036 parts, hydroquinone 0.009 parts, fatty alcohol polyoxyethylene ether 0.054 parts, styrene 26 parts, and HM2155 1.11 parts.

[0034] The preparation method of the thixotropic unsaturated polyester resin with good storage stability comprises the following steps:

[0035] The o-benzene type unsaturated polyester resin is mixed with UP-46 and fatty alcohol polyoxyethylene ether according to the feeding ratio, and stirred uniformly at a speed of 600 rpm / min by using a high-speed dispersing machine for 45 min. Then A200 is added in batches, and stirred uniformly at a speed of 1200 rpm / min by using a high-speed dispersing machine for 65 min. Then the mixture is poured into a grinder to be ground to a fineness of <10 μm. Finally, hydroquinone, styrene and HM2155 are sequentially added into the system, and stirred at a speed of 400 rpm / min for 40 min to be mixed uniformly, thereby obtaining the thixotropic unsaturated polyester resin with good storage stability.

[0036] Example 2

[0037] A thixotropic unsaturated polyester resin with good storage stability, raw materials comprising the following components by weight: o-benzene type unsaturated polyester resin 96.2 parts, A200 0.54 parts, UP-46 0.044 parts, hydroquinone 0.009 parts, fatty alcohol polyoxyethylene ether 0.044 parts, styrene 25 parts, and HM2155 1.11 parts.

[0038] The preparation method of the thixotropic unsaturated polyester resin with good storage stability comprises the following steps:

[0039] The o-benzene type unsaturated polyester resin is mixed with UP-46 and fatty alcohol polyoxyethylene ether according to the feeding ratio, and stirred uniformly at a speed of 900 rpm / min by using a high-speed dispersing machine for 45 min. Then A200 is added in batches, and stirred uniformly at a speed of 600 rpm / min by using a high-speed dispersing machine for 42 min. Then the mixture is poured into a grinder to be ground to a fineness of <10 μm. Finally, hydroquinone, styrene and HM2155 are sequentially added into the system, and stirred at a speed of 500 rpm / min for 25 min to be mixed uniformly, thereby obtaining the thixotropic unsaturated polyester resin with good storage stability.

[0040] Example 3

[0041] A thixotropic unsaturated polyester resin with good storage stability, raw materials comprising the following components by weight: o-benzene type unsaturated polyester resin 98.1 parts, A200 0.56 parts, UP-46 0.029 parts, hydroquinone 0.009 parts, fatty alcohol polyoxyethylene ether 0.035 parts, styrene 27 parts, and HM2155 1.11 parts.

[0042] The preparation method of the thixotropic unsaturated polyester resin with good storage stability comprises the following steps:

[0043] The o-benzene type unsaturated polyester resin is mixed with UP-46 and fatty alcohol polyoxyethylene ether according to the feeding ratio, and stirred uniformly at a speed of 700 rpm / min by using a high-speed dispersing machine for 30 min. Then A200 is added in batches, and stirred uniformly at a speed of 700 rpm / min by using a high-speed dispersing machine for 42 min, and then the mixture is poured into a grinder to be ground to a fineness of <10 μm. Finally, hydroquinone, styrene and HM2155 are sequentially added into the system, and stirred at a speed of 450 rpm / min for 33 min to be mixed uniformly, thereby obtaining the thixotropic unsaturated polyester resin with good storage stability.

[0044] Example 4

[0045] A thixotropic unsaturated polyester resin with good storage stability, raw materials comprising the following components by weight: o-benzene type unsaturated polyester resin 95.8 parts, A200 0.48 parts, UP-46 0.034 parts, hydroquinone 0.009 parts, fatty alcohol polyoxyethylene ether 0.030 parts, styrene 24 parts, and HM2155 1.11 parts.

[0046] The preparation method of the thixotropic unsaturated polyester resin with good storage stability comprises the following steps:

[0047] The o-benzene type unsaturated polyester resin is mixed with UP-46 and fatty alcohol polyoxyethylene ether according to the feeding ratio, and stirred uniformly at a speed of 800 rpm / min by using a high-speed dispersing machine for 38 min. Then A200 is added in batches, and stirred uniformly at a speed of 1000 rpm / min by using a high-speed dispersing machine for 60 min, and then the mixture is poured into a grinder to be ground to a fineness of <10 μm. Finally, hydroquinone, styrene and HM2155 are sequentially added into the system, and stirred at a speed of 550 rpm / min for 40 min to be mixed uniformly, thereby obtaining the thixotropic unsaturated polyester resin with good storage stability.

[0048] Example 5

[0049] A thixotropic unsaturated polyester resin with good storage stability, raw materials comprising the following components by weight: o-benzene type unsaturated polyester resin 97.5 parts, A200 0.63 parts, UP-46 0.054 parts, hydroquinone 0.009 parts, fatty alcohol polyoxyethylene ether 0.046 parts, styrene 30 parts, and HM2155 1.11 parts.

[0050] The preparation method of the thixotropic unsaturated polyester resin with good storage stability comprises the following steps:

[0051] The o-benzene type unsaturated polyester resin and UP-46, fatty alcohol polyoxyethylene ether are mixed according to the feeding ratio, and stirred uniformly by using a high-speed dispersing machine at a speed of 600 rpm / min for 38 min. A200 is added in batches, and stirred uniformly by using a high-speed dispersing machine at a speed of 1500 rpm / min for 50 min, and then the mixture is poured into a grinder to be ground to a fineness of <10 μm. Finally, hydroquinone, styrene, and HM2155 are sequentially added into the system, and stirred at a speed of 480 rpm / min for 33 min to be mixed uniformly, thereby obtaining the thixotropic unsaturated polyester resin with good storage stability.

[0052] Comparative Example 1

[0053] The present comparative example is the same as Example 1, except that the stirring speed and time in the preparation method are different.

[0054] The preparation method of the thixotropic unsaturated polyester resin with good storage stability comprises the following steps:

[0055] The o-benzene type unsaturated polyester resin and UP-46, fatty alcohol polyoxyethylene ether are mixed according to the feeding ratio, and stirred uniformly by using a high-speed dispersing machine at a speed of 600 rpm / min for 38 min. A200 is added in batches, and stirred uniformly by using a high-speed dispersing machine at a speed of 1500 rpm / min for 50 min, and then the mixture is poured into a grinder to be ground to a fineness of <10 μm. Finally, hydroquinone, styrene, and HM2155 are sequentially added into the system, and stirred at a speed of 480 rpm / min for 33 min to be mixed uniformly, thereby obtaining the thixotropic unsaturated polyester resin with good storage stability.

[0056] Comparative Example 2

[0057] The present comparative example is the same as Example 1, except that no fatty alcohol polyoxyethylene ether is added.

[0058] Comparative Example 3

[0059] The present comparative example is the same as Example 1, except that the adding sequence of raw materials in the preparation method is different.

[0060] The preparation method of the thixotropic unsaturated polyester resin with good storage stability comprises the following steps:

[0061] The A200 is added to the o-benzene type unsaturated polyester resin in batches according to the feeding ratio, and is uniformly stirred at a high speed of 1200 rpm / min by using a high-speed disperser, and the stirring time is 65 min, then the mixture is poured into a grinder to be ground to a fineness of <10 μm. Finally, the UP-46, the fatty alcohol polyoxyethylene ether, the hydroquinone, the styrene and the HM2155 are sequentially added to the system, and are uniformly mixed by stirring at 400 rpm / min for 33 min, and the thixotropic unsaturated polyester resin with good storage stability is obtained.

[0062] Performance test

[0063] I. Stability test

[0064] The thixotropic unsaturated polyester resin obtained in the examples and the comparative examples is subjected to a stability test, the sample is divided and sealed in a transparent sample bottle, and is respectively placed in a constant temperature oven at room temperature 25℃ and 60℃ for 60 days and 15 days, the appearance change of the sample is observed and recorded, the thixotropic value of the sample before and after storage is tested by using an NDJ type viscometer, and the thixotropic value test temperature is 25℃. The test results are shown in Table 1.

[0065] Table 1: Room temperature and high temperature stability results of examples and comparative examples

[0066] .

[0067] It can be verified from the performance test results of the examples and the comparative examples in Table 1 that the storage stability of the thixotropic resin can be greatly improved by adding the fatty alcohol polyoxyethylene ether, and the addition of the fatty alcohol polyoxyethylene ether does not affect the initial thixotropic value of the resin, and the thixotropic value does not obviously decrease, delamination and silicon gas separation occur after long-term storage, the thixotropic effect is relatively stable, the sample storage period can be prolonged, the loss cost is reduced, and the product performance stability is ensured. Example 1 is the best formula ratio and preparation process, and on this basis, reducing the addition of the anti-settling agent, changing the addition order of the anti-settling agent, reducing the dispersion speed and time of the silicon gas, all of which will affect the stability and thixotropic effect of the prepared thixotropic resin to some extent.

[0068] The above is only a preferred embodiment of the present application, and is not intended to limit the other forms of the present application. Any skilled person in the art can modify or change the above disclosed technical content to obtain equivalent embodiments. However, any simple modification, equivalent change and modification made on the basis of the technical essence of the present application to the above embodiments still belongs to the protection scope of the technical solution of the present application.

Claims

1. A thixotropic unsaturated polyester resin having good storage stability, characterized in that, The raw material is the following components in parts by weight: ortho-phenyl type unsaturated polyester resin 97 parts, A200 0.59 parts, UP-46 0.036 parts, hydroquinone 0.009 parts, fatty alcohol polyoxyethylene ether 0.054 parts, styrene 26 parts, HM2155 1.11 parts; The preparation method of the thixotropic unsaturated polyester resin with good storage stability comprises the following steps: mixing the ortho-phenyl type unsaturated polyester resin with UP-46 and fatty alcohol polyoxyethylene ether according to the feeding ratio, uniformly stirring with a high-speed dispersing machine at a speed of 600 rpm, and stirring for 45 min; Then, A200 is added in batches, uniformly stirred at a high speed of 1200 rpm with a high-speed dispersing machine, and stirred for 65 min, and then the mixture is poured into a grinder to be ground to a fineness of <10 μm; Finally, hydroquinone, styrene and HM2155 are sequentially added in the system, uniformly mixed by stirring at 400 rpm for 40 min, and the thixotropic unsaturated polyester resin with good storage stability is obtained.