Preparation method of super-weather-resistant polyester modified hydantoin epoxy acrylate

Abstract

The invention discloses a preparation method of super-weather-resistant polyester modified hydantoin epoxy acrylate, which comprises the following steps: reacting pentaerythritol triacrylate, hexahydrophthalic anhydride and cyclohexene oxide serving as main raw materials in the presence of triphenylphosphine serving as a catalyst, p-hydroxyanisole serving as a polymerization inhibitor and hypophosphorous acid serving as an antioxidant to obtain polyester resin containing monocarboxylic acid; and modifying hydantoin epoxy resin by using the prepared polyester resin to obtain the six-functionality polyester modified hydantoin epoxy acrylate. The main body structure of the resin is a saturated six-membered ring structure, a five-membered ring structure and a polyester structure, the phenomena of yellowing, pulverization and the like are not prone to occurring outdoors, and the resin has the outstanding advantages of being high in UV curing efficiency, resistant to abrasion and good in adhesion.

Description

Technical Field

[0001] The invention relates to the field of radiation-cured polymer materials, and in particular to a polyester-modified hydantoin epoxy acrylate with high curing efficiency, wear resistance and weather resistance, and a preparation method thereof. Background Art

[0002] Bisphenol A epoxy acrylate and its modified resin are obtained by esterification of commercial bisphenol A epoxy resin and acrylic acid or methacrylic acid. They are the most consumed type of photocurable oligomer in the domestic photocurable industry. They are a large category of photocurable resins, and have the characteristics of fast curing speed, high hardness, high gloss, and good chemical resistance. However, they generally have insufficient flexibility of the cured film, high brittleness, large volume shrinkage during curing, resulting in poor adhesion and poor impact resistance after film formation. In addition, the polymerization reaction is "frozen" by the rigid cross-linked network structure at a low conversion rate, and the residual unreacted groups and the benzene ring structure in the superimposed molecular structure are not conducive to aging resistance and yellowing resistance. Therefore, it is particularly meaningful to study special epoxy acrylates that have the characteristics of traditional epoxy acrylates and the properties they do not have (weather resistance and impact resistance). Summary of the invention

[0003] The first object of the present invention is to provide a polyester modified hydantoin epoxy acrylate with high curing efficiency, wear resistance and weather resistance according to a reasonable chemical structure combination, in view of the fact that ordinary bisphenol A epoxy acrylate in the prior art has a series of problems such as yellowing and powdering in long-term weather resistance. The second object of the present invention is to provide a synthesis method for the polyester modified hydantoin epoxy acrylate.

[0004] The hexafunctional polyester modified epoxy acrylate disclosed in the present invention contains not only multifunctional acrylate double bonds, but also ester groups, hexacyclic rings, and hydantoin rings (five-membered diazacyclic rings). The multifunctional active group acryloxy group provides high photocuring reactivity, high hardness, and high wear resistance, and the long-chain polyester modification provides certain flexibility and impact resistance. The synthesized polyester modified epoxy acrylate has good solubility in common (meth)acrylate active monomers, is used as a main resin for coating production, and can improve the weather resistance and wear resistance of the coating in outdoor use environments; and has a series of characteristics such as hardness and gloss.

[0005] Technical solution: The polyester modified hydantoin epoxy acrylate prepared by the present invention has the following structural formula:

[0006]

[0007] n≥0.

[0008] The present invention provides a method for preparing super weather-resistant polyester modified hydantoin epoxy acrylate, which comprises the following steps:

[0009] (1) taking pentaerythritol triacrylate, adding hexahydrophthalic anhydride, cyclohexene oxide, a catalyst, an antioxidant and a polymerization inhibitor, reacting at 100 to 110° C., and when the acid value reaches the theoretical value, the first step trifunctional polyester acrylate is obtained;

[0010] (2) The polyester acrylate obtained in the first step is cooled to 40-50°C, and then a hydantoin epoxy resin and a catalyst are added. After reacting at 90-100°C, the temperature is gradually raised to 110-120°C and kept warm. When the acid value is ≤3 mg KOH / g, a hexafunctional polyester modified hydantoin epoxy acrylate is obtained.

[0011] According to a further optimized solution, the trifunctional polyester acrylate is prepared as a raw material according to a certain ratio, and different ratios can produce trifunctional polyester acrylates with different molecular weights.

[0012] As a preferred embodiment, the preparation method of the super weather-resistant polyester modified hydantoin epoxy acrylate of the present invention comprises the following steps:

[0013] (1) adding 2 mol of hexahydrophthalic anhydride and 1 mol of cyclohexene oxide, 8 g of triphenylphosphine as a catalyst, 2 g of hypophosphorous acid as an antioxidant, and 2 g of p-hydroxyanisole as a polymerization inhibitor to 1 mol of pentaerythritol triacrylate, and reacting at 100-110° C., and when the acid value is ≤80 mg KOH / g, a first step trifunctional polyester acrylate is obtained;

[0014] (2) The trifunctional polyester acrylate prepared in the first step is cooled to 40-50°C, and then 0.5 mol of hydantoin epoxy resin is added, 2.5 g of triphenylphosphine is used as a catalyst, and 1.5 g of 2,6-di-tert-butyl-p-cresol is used as an antioxidant; after reacting at 90-100°C for 2 hours, the temperature is gradually raised to 110-120°C and kept warm for 1 hour. When the acid value is ≤3 mg KOH / g, hexafunctional polyester modified hydantoin epoxy acrylate is obtained.

[0015] Further optimizing the scheme, the hydantoin epoxy resin is a commercial resin, and the structural formula is as follows:

[0016]

[0017] Due to the adoption of the above technical solution, the beneficial effects achieved are as follows:

[0018] The present invention provides a two-step synthesis method of polyester modified hydantoin epoxy acrylate. First, a polyester synthesis method without dehydration is adopted (hydroxyl reacts with anhydride to generate carboxyl, and then the generated carboxyl reacts with epoxy to generate hydroxyl. According to a certain proportion of feed, polyester acrylate resins with terminal carboxyl groups of different molecular weights can be designed and produced); second, the produced polyester acrylate resin with terminal carboxyl groups can directly react with diofficial hydantoin epoxy resin to generate a resin with three acryloyloxy groups at each end, and the resin has the ability to achieve ultraviolet light curing; third, the process time is short, and the whole production time is 6 to 7 hours; no three wastes (waste water, waste gas, and waste residue) are generated during the production process, and the environment is friendly. The prepared product has stable performance and good reproducibility of quality indicators.

[0019] A second object of the present invention is to provide the practical application field of the polyester modified hyaluronic acid epoxy acrylate: outdoor light-cured court floor finish. Conventional polyurethane and acrylic floor finish have long film-forming time, high labor cost, large pollution, and the problems such as accurately preparing the ratio of main paint and curing agent during construction, which are not as fast and convenient as single-component light-cured finish. Light-cured ground surface paint can be used immediately after the construction is completed. Added as the main resin in the floor coating finish formula, it has the indicators such as adhesion, scratch resistance, wear resistance, anti-aging (no discoloration, powderization for a long time outdoors), and has achieved very good technical progress. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is the structural formula of the polyester modified hydantoin epoxy acrylate prepared in Example 1 of the present invention.

[0021] Figure 2 This is the structural formula of the polyester modified hydantoin epoxy acrylate prepared in Example 2 of the present invention.

[0022] Figure 3 This is the structural formula of the polyester modified hydantoin epoxy acrylate prepared in Example 3 of the present invention.

[0023] Figure 4 This is the structural formula of the polyester modified hydantoin epoxy acrylate prepared in Example 4 of the present invention.

[0024] Figure 5 This is the structural formula of the polyester modified hydantoin epoxy acrylate prepared in Example 5 of the present invention.

[0025] Figure 6 This is the structural formula of the polyester modified hydantoin epoxy acrylate prepared in Example 6 of the present invention. DETAILED DESCRIPTION

[0026] 1. The present invention will be further described in detail below in conjunction with specific implementation methods.

[0027] Example 1

[0028] A novel method for synthesizing polyester-modified hydantoin epoxy acrylate specifically comprises the following steps:

[0029] (1) 1 mol of pentaerythritol triacrylate, 1 mol of hexahydrophthalic anhydride, 3 g of triphenylphosphine, 1.5 g of hypophosphorous acid, and 1.5 g of p-hydroxyanisole are directly placed in a four-necked flask equipped with a constant pressure dropping funnel and a thermometer, stirring is started, the temperature is evenly raised to 100-110° C., and the temperature is kept for 1 hour; the remaining 3 g of triphenylphosphine is added, and the temperature is kept for another 1-2 hours, and the acid value is monitored in real time. When the acid value reaches ≤130 mg KOH / g, the trifunctional polyester acrylate of the first step is obtained;

[0030] (2) Cooling water is passed to cool the mixture to below 50°C, and 0.5 mol of hydantoin epoxy resin in the constant pressure dropping funnel is added dropwise for 0.5 hours; after the addition is completed, 2 g of triphenylphosphine is added as a catalyst and 1 g of 2,6-di-tert-butyl-p-cresol is added as an antioxidant, and the temperature is uniformly raised to 90°C, and the temperature is kept between 90 and 100°C for 2 hours; the temperature is then gradually raised to 110 to 120°C and kept for 1 hour. When the acid value is ≤3 mg KOH / g, hexafunctional polyester modified hydantoin epoxy acrylate is obtained. The chemical structure is as follows: Figure 1 .

[0031] Example 2

[0032] A novel method for synthesizing polyester-modified hydantoin epoxy acrylate specifically comprises the following steps:

[0033] (1) 1 mol of pentaerythritol triacrylate, 2 mol of hexahydrophthalic anhydride, 1 mol of cyclohexene oxide, 4 g of triphenylphosphine, 2 g of hypophosphorous acid, and 2 g of p-hydroxyanisole are directly placed in a four-necked flask equipped with a constant pressure dropping funnel and a thermometer, stirring is started, the temperature is evenly raised to 100-110° C., and the temperature is kept for 1 hour; the remaining 4 g of triphenylphosphine is added, and the temperature is kept for another 1-2 hours, and the acid value is monitored in real time. When the acid value reaches ≤80 mg KOH / g, the trifunctional polyester acrylate of the first step is obtained;

[0034] (2) Cooling water is passed through the funnel to cool down to below 50°C, and 0.5 mol of hydantoin epoxy resin in the constant pressure dropping funnel is added dropwise for 0.5 hours; after the addition is completed, 2.5 g of triphenylphosphine is added as a catalyst and 1.5 g of 2,6-di-tert-butyl-p-cresol is added as an antioxidant, and the temperature is uniformly raised to 90°C, and the temperature is kept between 90 and 100°C for 2 hours; then the temperature is gradually raised to 110 to 120°C and kept for 1 hour. When the acid value is ≤3 mg KOH / g, hexafunctional polyester modified hydantoin epoxy acrylate is obtained. The chemical structure is as follows: Figure 2 .

[0035] Example 3

[0036] A novel method for synthesizing polyester-modified hydantoin epoxy acrylate specifically comprises the following steps:

[0037] (1) 1 mol of pentaerythritol triacrylate, 3 mol of hexahydrophthalic anhydride, 2 mol of cyclohexene oxide, 5 g of triphenylphosphine, 2.5 g of hypophosphorous acid, and 2.5 g of p-hydroxyanisole are directly placed in a four-necked flask equipped with a constant pressure dropping funnel and a thermometer, stirring is started, the temperature is evenly raised to 100-110° C., and the temperature is kept for 1 hour; the remaining 5 g of triphenylphosphine is added, and the temperature is kept for another 1-2 hours, and the acid value is monitored in real time. When the acid value reaches ≤60 mg KOH / g, the trifunctional polyester acrylate of the first step is obtained;

[0038] (2) Cooling water is passed through the funnel to cool down to below 50°C, and 0.5 mol of hydantoin epoxy resin in the constant pressure dropping funnel is added dropwise for 0.5 hours; after the addition is completed, 3 g of triphenylphosphine is added as a catalyst and 2 g of 2,6-di-tert-butyl-p-cresol is added as an antioxidant, and the temperature is uniformly raised to 90°C, and the temperature is kept between 90 and 100°C for 2 hours; then the temperature is gradually raised to 110 to 120°C and kept for 1 hour. When the acid value is ≤3 mg KOH / g, hexafunctional polyester modified hydantoin epoxy acrylate is obtained. The chemical structure is as follows: Figure 3 .

[0039] Example 4

[0040] A novel method for synthesizing polyester-modified hydantoin epoxy acrylate specifically comprises the following steps:

[0041] (1) 1 mol of pentaerythritol triacrylate, 4 mol of hexahydrophthalic anhydride, 3 mol of cyclohexene oxide, 6 g of triphenylphosphine, 3 g of hypophosphorous acid, and 3 g of p-hydroxyanisole are directly placed in a four-necked flask equipped with a constant pressure dropping funnel and a thermometer, stirring is started, the temperature is evenly raised to 100-110° C., and the temperature is kept for 1 hour; the remaining 6 g of triphenylphosphine is added, and the temperature is kept for another 1-2 hours, and the acid value is monitored in real time. When the acid value reaches ≤50 mg KOH / g, the trifunctional polyester acrylate of the first step is obtained;

[0042] (2) Cooling water is passed through to cool the temperature to below 50°C, and 0.5 mol of hydantoin epoxy resin in the constant pressure dropping funnel is added dropwise for 0.5 hours; after the addition is completed, 3.5 g of triphenylphosphine is added as a catalyst and 2.5 g of 2,6-di-tert-butyl-p-cresol is added as an antioxidant, and the temperature is uniformly raised to 90°C, and the temperature is kept between 90 and 100°C for 2 hours; then the temperature is gradually raised to 110 to 120°C and kept for 1 hour. When the acid value is ≤3 mg KOH / g, hexafunctional polyester modified hydantoin epoxy acrylate is obtained. The chemical structure is as follows: Figure 4 .

[0043] Example 5

[0044] A novel method for synthesizing polyester-modified hydantoin epoxy acrylate specifically comprises the following steps:

[0045] (1) 1 mol of pentaerythritol triacrylate, 5 mol of hexahydrophthalic anhydride, 4 mol of cyclohexene oxide, 7 g of triphenylphosphine, 3.5 g of hypophosphorous acid, and 3.5 g of p-hydroxyanisole are directly placed in a four-necked flask equipped with a constant pressure dropping funnel and a thermometer, stirring is started, the temperature is evenly raised to 100-110° C., and the temperature is kept for 1 hour; the remaining 7 g of triphenylphosphine is added, and the temperature is kept for another 1-2 hours, and the acid value is monitored in real time. When the acid value reaches ≤40 mg KOH / g, the trifunctional polyester acrylate of the first step is obtained;

[0046] (2) Cooling water is passed through the funnel to cool down to below 50°C, and 0.5 mol of hydantoin epoxy resin in the constant pressure dropping funnel is added dropwise for 0.5 hours; after the addition is completed, 4 g of triphenylphosphine is added as a catalyst and 3 g of 2,6-di-tert-butyl-p-cresol is added as an antioxidant, and the temperature is uniformly raised to 90°C, and the temperature is kept between 90 and 100°C for 2 hours; then the temperature is gradually raised to 110 to 120°C and kept for 1 hour. When the acid value is ≤3 mg KOH / g, hexafunctional polyester modified hydantoin epoxy acrylate is obtained. The chemical structure is as follows: Figure 5 .

[0047] Example 6

[0048] A novel method for synthesizing polyester-modified hydantoin epoxy acrylate specifically comprises the following steps:

[0049] (1) 1 mol of pentaerythritol triacrylate, 6 mol of hexahydrophthalic anhydride, 5 mol of cyclohexene oxide, 8 g of triphenylphosphine, 4 g of hypophosphorous acid, and 4 g of p-hydroxyanisole are directly placed in a four-necked flask equipped with a constant pressure dropping funnel and a thermometer, stirring is started, the temperature is evenly raised to 100-110° C., and the temperature is kept for 1 hour; the remaining 8 g of triphenylphosphine is added, and the temperature is kept for another 1-2 hours, and the acid value is monitored in real time. When the acid value reaches ≤35 mg KOH / g, the trifunctional polyester acrylate of the first step is obtained;

[0050] (2) Cooling water is passed through the funnel to cool down to below 50°C, and 0.5 mol of hydantoin epoxy resin in the constant pressure dropping funnel is added dropwise for 0.5 hours; after the addition is completed, 4.5 g of triphenylphosphine is added as a catalyst and 3.5 g of 2,6-di-tert-butyl-p-cresol is added as an antioxidant, and the temperature is uniformly raised to 90°C, and the temperature is kept between 90 and 100°C for 2 hours; then the temperature is gradually raised to 110 to 120°C and kept for 1 hour. When the acid value is ≤3 mg KOH / g, hexafunctional polyester modified hydantoin epoxy acrylate is obtained. The chemical structure is as follows: Figure 6 .

[0051] Example 7 Application Example

[0052] 1. Formula of radiation-cured court floor topcoat: The polyester-modified hydantoin epoxy acrylate prepared in the above Examples 1 to 6 is used in the preparation method of radiation coating formula: (weight percentage)

[0053]

[0054]

[0055] Among them, the active diluent is CTFA (cyclotrimethylolpropane formal monoacrylate) of Jiangsu Sanmu Chemical Co., Ltd., PO2-NPGDA (propoxylated neopentyl glycol diacrylate) of Jiangsu Sanmu Chemical Co., Ltd., the initiator is 184 (1-hydroxy-cyclohexyl-phenyl ketone) of Jiangsu Sanmu Chemical Co., Ltd., the initiator is TPO (2,4,6-trimethylbenzoyl-diphenylphosphine oxide) of IGM, and the auxiliary agent is BYK's 310 leveling agent.

[0056] 2. Production method of radiation-cured court floor topcoat:

[0057] In a container equipped with a stirring device, add 20% by weight of PO2-NPGDA active diluent, 7.7% by weight of CTFA active diluent, 3% of 184 initiator, 1% of TPO initiator, and 0.3% of BYK310 leveling agent, stir to dissolve, and then add 68% by weight of polyester modified hydantoin epoxy acrylate prepared in Examples 1 to 6 respectively, stir at 20 to 50° C. to mix evenly to obtain radiation-cured court floor topcoat.

[0058] 3. Practical application performance evaluation of different implementation examples:

[0059] The coatings of Examples 1 to 6 were prepared according to the formula of the application example and applied on the cement prefabricated board (the epoxy base and the midcoat had been cured), with a coating amount of 100 g / m 2 After roller coating, it is leveled by far infrared for 1 minute, and the UV energy is 300mj / cm 2 Oxygen curing conditions.

[0060] After UV curing, the test samples were placed in a constant temperature and humidity room (temperature 25°C, humidity 45% to 55%) for 24 hours to perform various performance tests on Examples 1 to 6 (all results were measured in a constant temperature and humidity laboratory). The performance test methods are shown in Table 1. The test results are shown in Table 2 below:

[0061] Table 1

[0062]

[0063] Table 2

[0064]

[0065]

[0066] The above experimental results show that the polyester modified hyaluronic acid epoxy acrylate resin prepared in Examples 1 to 3 (especially Example 2) of the present invention can be used as a preferred solution for radiation-cured court floor topcoat and used as the main material. It has adhesion, wear resistance, impact resistance, weather resistance and other indicators, and has achieved very good technical progress.

[0067] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A super weather-resistant polyester modified hydantoin epoxy acrylate, characterized in that: It has the following structural formula:

2. The method for preparing a super weather-resistant polyester modified hydantoin epoxy acrylate according to claim 1, characterized in that: The following steps are involved: (1) taking pentaerythritol triacrylate, adding hexahydrophthalic anhydride, cyclohexene oxide, a catalyst, an antioxidant and a polymerization inhibitor, reacting at 100 to 110° C., and when the acid value reaches the theoretical value, the first step trifunctional polyester acrylate is obtained; (2) The polyester acrylate obtained in the first step is cooled to 40-50°C, and then a hydantoin epoxy resin and a catalyst are added to react at 90-100°C, and then the temperature is gradually increased to 110-120°C and kept warm. When the acid value is ≤3 mg KOH / g, a hexafunctional polyester modified hydantoin epoxy acrylate is obtained.

3. The method for preparing a super weather-resistant polyester modified hydantoin epoxy acrylate according to claim 2, characterized in that: The following steps are involved: (1) adding 1 mol of hexahydrophthalic anhydride, 6 g of triphenylphosphine as a catalyst, 1.5 g of hypophosphorous acid as an antioxidant and 1.5 g of p-hydroxyanisole as an inhibitor to 1 mol of pentaerythritol triacrylate, reacting at 100-110° C., and when the acid value is ≤130 mgKOH / g, obtaining the first step trifunctional polyester acrylate; (2) The trifunctional polyester acrylate obtained in the first step is cooled to 40-50°C, and then 0.5 mol of hydantoin epoxy resin, 2 g of catalyst triphenylphosphine, and 1 g of antioxidant 2,6-di-tert-butyl-p-cresol are added. After reacting at 90-100°C for 2 hours, the temperature is gradually raised to 110-120°C and kept warm for 1 hour. When the acid value is ≤3 mg KOH / g, hexafunctional polyester modified hydantoin epoxy acrylate is obtained.

4. The method for preparing a super weather-resistant polyester modified hydantoin epoxy acrylate according to claim 2, characterized in that: The following steps are involved: (1) adding 2 mol of hexahydrophthalic anhydride and 1 mol of cyclohexene oxide, 8 g of triphenylphosphine as a catalyst, 2 g of hypophosphorous acid as an antioxidant, and 2 g of p-hydroxyanisole as an inhibitor to 1 mol of pentaerythritol triacrylate, and reacting at 100-110° C., and when the acid value is ≤80 mgKOH / g, a first step trifunctional polyester acrylate is obtained; (2) The trifunctional polyester acrylate prepared in the first step is cooled to 40-50°C, and then 0.5 mol of hydantoin epoxy resin is added, 2.5 g of triphenylphosphine is used as a catalyst, and 1.5 g of 2,6-di-tert-butyl-p-cresol is used as an antioxidant; after reacting at 90-100°C for 2 hours, the temperature is gradually raised to 110-120°C and kept warm for 1 hour. When the acid value is ≤3 mg KOH / g, hexafunctional polyester modified hydantoin epoxy acrylate is obtained.

5. The method for preparing a super weather-resistant polyester modified hydantoin epoxy acrylate according to claim 2, characterized in that: The following steps are involved: (1) adding 3 moles of hexahydrophthalic anhydride and 2 moles of cyclohexene oxide to 1 mole of pentaerythritol triacrylate, using 10 g of triphenylphosphine as a catalyst, 2.5 g of hypophosphorous acid as an antioxidant, and 2.5 g of p-hydroxyanisole as a polymerization inhibitor, reacting at 100-110° C., and when the acid value is ≤60 mgKOH / g, obtaining the first step trifunctional polyester acrylate; (2) The trifunctional polyester acrylate prepared in the first step is cooled to 40-50°C, and then 0.5 mol of hydantoin epoxy resin is added, 3 g of triphenylphosphine is used as a catalyst, and 2 g of 2,6-di-tert-butyl-p-cresol is used as an antioxidant; after reacting at 90-100°C for 2 hours, the temperature is gradually raised to 110-120°C and kept warm for 1 hour. When the acid value is ≤3 mg KOH / g, hexafunctional polyester modified hydantoin epoxy acrylate is obtained.

6. The method for preparing a super weather-resistant polyester modified hydantoin epoxy acrylate according to claim 2, characterized in that: The following steps are involved: (1) adding 4 moles of hexahydrophthalic anhydride and 3 moles of cyclohexene oxide to 1 mole of pentaerythritol triacrylate, using 12 g of triphenylphosphine as a catalyst, 3 g of hypophosphorous acid as an antioxidant, and 3 g of p-hydroxyanisole as a polymerization inhibitor, reacting at 100-110° C., and when the acid value is ≤50 mgKOH / g, obtaining the first step trifunctional polyester acrylate; (2) The trifunctional polyester acrylate prepared in the first step is cooled to 40-50°C, and then 0.5 mol of hydantoin epoxy resin is added, 3.5 g of triphenylphosphine is used as a catalyst, and 2.5 g of 2,6-di-tert-butyl-p-cresol is used as an antioxidant; after reacting at 90-100°C for 2 hours, the temperature is gradually raised to 110-120°C and kept warm for 1 hour. When the acid value is ≤3 mg KOH / g, hexafunctional polyester modified hydantoin epoxy acrylate is obtained.

7. The method for preparing a super weather-resistant polyester modified hydantoin epoxy acrylate according to claim 2, characterized in that: The following steps are involved: (1) adding 5 mol of hexahydrophthalic anhydride and 4 mol of cyclohexene oxide to 1 mol of pentaerythritol triacrylate, using 14 g of triphenylphosphine as a catalyst, 3.5 g of hypophosphorous acid as an antioxidant, and 3.5 g of p-hydroxyanisole as a polymerization inhibitor, reacting at 100-110° C., and when the acid value is ≤40 mgKOH / g, obtaining the first step trifunctional polyester acrylate; (2) The trifunctional polyester acrylate prepared in the first step is cooled to 40-50°C, and then 0.5 mol of hydantoin epoxy resin is added, 4 g of triphenylphosphine is used as a catalyst, and 3 g of 2,6-di-tert-butyl-p-cresol is used as an antioxidant; after reacting at 90-100°C for 2 hours, the temperature is gradually raised to 110-120°C and kept warm for 1 hour. When the acid value is ≤3 mg KOH / g, hexafunctional polyester modified hydantoin epoxy acrylate is obtained.

8. The method for preparing a super weather-resistant polyester modified hydantoin epoxy acrylate according to claim 2, characterized in that: The following steps are involved: (1) adding 6 moles of hexahydrophthalic anhydride and 5 moles of cyclohexene oxide to 1 mole of pentaerythritol triacrylate, using 16 g of triphenylphosphine as a catalyst, 4 g of hypophosphorous acid as an antioxidant, and 4 g of p-hydroxyanisole as a polymerization inhibitor, reacting at 100-110° C., and when the acid value is ≤35 mgKOH / g, obtaining the first step trifunctional polyester acrylate; (2) The trifunctional polyester acrylate prepared in the first step is cooled to 40-50°C, and then 0.5 mol of hydantoin epoxy resin is added, 4.5 g of triphenylphosphine is used as a catalyst, and 3.5 g of 2,6-di-tert-butyl-p-cresol is used as an antioxidant; after reacting at 90-100°C for 2 hours, the temperature is gradually raised to 110-120°C and kept warm for 1 hour. When the acid value is ≤3 mg KOH / g, hexafunctional polyester modified hydantoin epoxy acrylate is obtained.

9. Use of the super weather-resistant polyester modified hydantoin epoxy acrylate according to claim 1 in the preparation of radiation-cured floor finish.

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