Antioxidant compound with both anti-burning and anti-yellowing properties, preparation method and application thereof

Abstract

The present application relates to an antioxidant compound with both anti-burning and anti-yellowing properties, as well as a preparation method and application. The antioxidant compound comprises the following components by weight: 6 to 60 parts of a hindered phenol antioxidant; 10 to 50 parts of a phosphite antioxidant; 25 to 65 parts of an ultraviolet absorber; and 5 to 45 parts of a hindered amine light stabilizer; wherein the hindered phenol antioxidant comprises antioxidant 1135 and antioxidant 245; and by weight of the antioxidant compound, the weight of antioxidant 1135 is 5 to 40 parts, and the weight of antioxidant 245 is 1 to 20 parts. The antioxidant compound comprises hindered phenol antioxidants, phosphite antioxidants and a light stabilizer system at the same time. Through the effective coordination of the above components, the antioxidant compound can balance the anti-burning and anti-yellowing capabilities, thereby enabling the antioxidant compound to be added once to solve the scorching problem of sponge foaming and the yellowing problem after sponge molding at one time.

Description

Technical Field

[0001] The present application relates to the technical field of antioxidant additives, and in particular to an antioxidant compound having both anti-burning and anti-yellowing properties, and a preparation method and application thereof. Background Art

[0002] The polyether used in polyurethane soft foam sponge has a high internal temperature during the subsequent foaming process, which can easily cause serious core burning. Therefore, antioxidants with excellent anti-core burning performance have become an urgent need for polyether manufacturers. At the same time, the yellowing resistance of polyurethane soft foam sponge is also closely related to antioxidants.

[0003] In the prior art, most antioxidants used in polyether are complex antioxidants, BHT, 1076, etc., but they cannot meet the requirements of sponge anti-burning. With the gradual improvement of market requirements, BHT and cheap complex antioxidants are also difficult to meet environmental protection requirements. Antioxidant 1076 has a very low melting point. If it is not dried thoroughly, low-volatile solvents will exist. In addition, antioxidant 1076 is in powder form, which is inconvenient to add and has odor. It has poor anti-burning performance when used in soft foam sponges.

[0004] Although there are composite antioxidants based on antioxidant 1135 in the prior art, due to poor formulation, technical limitations and increased requirements for cost-effectiveness, they cannot solve the polyether core anti-burning problem well. As a result, sponge manufacturers have to add additional antioxidants and a large amount of physical foaming agents in the summer to ensure the safe production of sponges, which increases costs and operational difficulties.

[0005] In addition, although the anti-burning agents PUR55, ST21 and chicnox325 sold on the market have good anti-burning effects when used in sponges, their anti-yellowing performance is relatively poor, especially yellowing caused by ultraviolet light and yellowing caused by nitrogen oxides. Generally, from the perspective of additives, sponge yellowing includes the following four types: (1) thermal oxygen aging yellowing caused by high temperature during sponge foaming / processing; (2) yellowing caused by contact with nitrogen oxides (NOx) in the air; (3) yellowing caused by heat and oxygen aging caused by high temperature during sponge foaming / processing; (4) yellowing caused by contact with nitrogen oxides (NOx) in the air; (5) yellowing caused by heat and oxygen aging caused by high temperature during sponge foaming / processing; (6) yellowing caused by heat and oxygen aging caused by high temperature during sponge foaming / processing; (7) yellowing caused by heat and oxygen aging caused by high temperature during sponge foaming / processing; (8) yellowing caused by heat and oxygen aging caused by high temperature during sponge foaming / processing; (9) yellowing caused by heat and oxygen aging caused by high temperature during sponge foaming / processing; (10) yellowing caused by heat and oxygen aging caused by high temperature during sponge foaming / processing; (11) yellowing caused by heat and oxygen aging caused by high temperature during sponge foaming / processing; (12) yellowing caused by heat and oxygen aging caused by high temperature during sponge foaming / processing; (13) yellowing caused by heat and oxygen aging caused by high temperature during sponge foaming / processing; (14) yellowing caused by heat and oxygen aging caused by high temperature during sponge foaming / processing; (15) yellowing caused by heat and oxygen aging caused by high temperature during sponge foaming / processing; (16) yellowing caused by heat and oxygen aging caused by high temperature during sponge foaming / processing; (17) yellowing caused by heat and oxygen X ) yellowing caused by smoke; (3) fabric pollution caused by sponges; (4) yellowing caused by sponges contacting ultraviolet rays. These yellowings are often directly related to antioxidants. Antioxidants may have a positive inhibitory effect on some of the above yellowings, but at the same time they may also have a negative effect and promote the occurrence of other types of yellowing.

[0006] Therefore, it is very important to provide an antioxidant compound that has both anti-burning and anti-yellowing properties for the production of polyurethane soft foam. Summary of the invention

[0007] In order to address the deficiencies in the prior art, the present application provides an antioxidant composite having both anti-burning and anti-yellowing properties, wherein the antioxidant composite simultaneously comprises a hindered phenol antioxidant (primary antioxidant), a phosphite antioxidant (auxiliary antioxidant) and a light stabilizer system (ultraviolet absorber and hindered amine light stabilizer). Through the effective combination of the above components, the antioxidant composite is able to balance the anti-burning and anti-yellowing properties, thereby enabling the antioxidant composite to be added once to solve both the scorching problem of sponge foaming and the yellowing problem of sponge after molding at one time.

[0008] To this end, the first aspect of the present application provides an antioxidant compound having both anti-burning and anti-yellowing properties, wherein the antioxidant compound comprises the following components in parts by weight:

[0009]

[0010] The hindered phenol antioxidant includes antioxidant 1135 and antioxidant 245; and based on the weight of the antioxidant complex, the weight of the antioxidant 1135 is 5 to 40 parts, and the weight of the antioxidant 245 is 1 to 20 parts.

[0011] The hindered phenol antioxidants described in the present application include antioxidant 1135 and antioxidant 245. Antioxidant 245 has better heat resistance and anti-discoloration ability. Antioxidant 1135 not only has anti-scorching ability, but also has excellent compatibility and can integrate various components with each other. There is a synergistic effect between the two. The combination of the two can significantly improve the anti-burning and anti-yellowing ability of the antioxidant complex. When used in combination, the sponge can have a higher initial oxidation temperature than when used alone, and the anti-yellowing performance of light and gas fumigation is also better.

[0012] The phosphite antioxidant in this application is an auxiliary antioxidant, which can decompose the hydroperoxides produced during the thermal oxidative aging process and regenerate the main antioxidants (antioxidant 1135 and antioxidant 245), so it has excellent anti-color change ability. At the same time, the phosphite antioxidant, especially 508T, has a lower viscosity, which is more conducive to the fusion of components.

[0013] The ultraviolet absorber and hindered amine light stabilizer in the present application form a light stabilizer system. The light stabilizer system cooperates with the hindered phenol antioxidant and the phosphite antioxidant in the antioxidant complex, so that the antioxidant complex can balance the anti-burning and anti-yellowing capabilities, thereby making it possible to solve the scorching problem of sponge foaming and the yellowing problem of sponge after molding at one time by adding the antioxidant complex once.

[0014] In some embodiments, the weight portion of the antioxidant 1135 is 20 to 40 parts, the weight portion of the antioxidant 245 is 1 to 10 parts; and the weight ratio of the antioxidant 1135 to the antioxidant 245 is (2 to 5):1.

[0015] In some preferred embodiments, the weight ratio of the antioxidant 1135 to the antioxidant 245 is 4:1.

[0016] By controlling the weight fraction and weight ratio of antioxidant 1135 and antioxidant 245 within the above range, the present application can better exert the synergistic effect between the two, thereby better improving the anti-burning and anti-yellowing properties of the antioxidant composite.

[0017] In some embodiments, the phosphite antioxidant is antioxidant 508T, and the weight proportion of the phosphite antioxidant is 20 to 30 parts.

[0018] In the present application, antioxidant 508T has a lower viscosity, which is more conducive to the fusion of components; and its molecular structure contains a spirocyclic structure, which can complement the polyether flexible structure in the antioxidant 245 molecule, thereby forming an efficient synergistic system. After comparing the initial oxidation temperature test, the initial oxidation temperature of the sponge after adding this component is greatly improved. In addition, by further controlling the weight of antioxidant 508T to 20 to 30 parts, the performance of the antioxidant complex can be further improved.

[0019] In some embodiments, the ultraviolet absorber is ultraviolet absorber UV-1, and the hindered amine light stabilizer is light stabilizer 292.

[0020] In the present application, the ultraviolet absorber UV-1 and the light stabilizer 292 have a synergistic effect, and the light stabilizer system composed of the ultraviolet absorber UV-1 and the light stabilizer 292 also has a synergistic effect when used in combination with the primary antioxidant (antioxidant 1135 and antioxidant 245) and the auxiliary antioxidant (phosphite antioxidant 508T). Therefore, when the ultraviolet absorber in the oxidant complex is the ultraviolet absorber UV-1 and the hindered amine light stabilizer is the light stabilizer 292, the performance of the antioxidant complex can be improved, thereby effectively improving the yellowing caused by ultraviolet light and the yellowing caused by nitrogen oxides.

[0021] In some embodiments, the weight portion of the ultraviolet absorber UV-1 is 25 to 35 parts, the weight portion of the light stabilizer 292 is 8 to 10 parts; and the weight ratio of the ultraviolet absorber UV-1 to the light stabilizer 292 is (3 to 4):1.

[0022] In some preferred embodiments, the weight ratio of the ultraviolet absorber UV-1 to the light stabilizer 292 is 3:1.

[0023] By controlling the weight fraction and weight ratio of the ultraviolet absorber UV-1 and the light stabilizer 292 within the above range, the present application can better exert the synergistic effect between the two, thereby better improving the anti-burning and anti-yellowing properties of the antioxidant composite.

[0024] In some preferred embodiments, the antioxidant compound comprises, by weight:

[0025]

[0026] The weight ratio of antioxidant 1135 to antioxidant 245 is 4:1, and the weight ratio of ultraviolet absorber UV-1 to light stabilizer 292 is 3:1.

[0027] The present application can maximize the anti-burning performance and anti-yellowing performance of the antioxidant compound by adopting the formula of the above antioxidant compound.

[0028] The second aspect of the present application provides a method for preparing the antioxidant complex as described in the first aspect of the present application, the method comprising: under the protection of an inert gas, mixing the components of the antioxidant complex and heating them until the components are melted, mixing them evenly and then cooling them to obtain the antioxidant complex.

[0029] The present application does not particularly limit the specific type of the inert gas, and those skilled in the art can make a conventional selection as needed. In some specific embodiments, the inert gas can be, for example, nitrogen, helium, etc.

[0030] In some embodiments, the heating temperature is 80-85°C.

[0031] The present application controls the heating temperature within the above range, which is more conducive to the melting of each component without damaging the performance of the component. In the present application, the heating temperature can be appropriately increased according to the specific operation conditions, such as increased to 90°C, but it is preferred to control the heating temperature within the range of 80-85°C.

[0032] In some specific embodiments, the preparation method specifically comprises:

[0033] (1) Using nitrogen to inertate the preparation kettle;

[0034] (2) adding the components of the antioxidant complex into the preparation kettle according to the required amount;

[0035] (3) stirring and mixing and heating to 80-85° C. to fully melt the components and mix them evenly;

[0036] (4) After appropriate cooling, sampling and analysis are performed, and after the sample is qualified, filling is performed to obtain the antioxidant complex.

[0037] The third aspect of the present application provides an application of the antioxidant compound as described in the first aspect of the present application or the antioxidant compound prepared by the method described in the second aspect of the present application added to polyether for sponge preparation.

[0038] The antioxidant compound in the present application can balance the anti-burning and anti-yellowing capabilities. The antioxidant compound can solve the scorching problem of sponge foaming and the yellowing problem of sponge after molding at one time by adding it once, so it can be well used in the preparation of sponges containing polyether.

[0039] The fourth aspect of the present application provides a sponge containing polyether, characterized in that the polyether is added with the antioxidant compound as described in the first aspect of the present application or the antioxidant compound prepared by the method described in the second aspect.

[0040] The antioxidant compound in the present application has both anti-burning and anti-yellowing properties. Therefore, when the antioxidant compound is added to the polyether at one time, the anti-burning and anti-yellowing capabilities of the prepared sponge can be significantly improved, so that the sponge has a higher initial oxidation temperature, and the anti-yellowing performance under light and gas fumigation is also better.

[0041] In some embodiments, the amount of the antioxidant compound added to the polyether is 3000-4000 ppm.

[0042] The present application controls the amount of the antioxidant compound added within the above range, so that the antioxidant compound can better exert its anti-burning and anti-yellowing effects. If the amount of the antioxidant compound used is too little, it will not have the anti-burning and anti-yellowing effects; if the amount of the antioxidant compound used is too much, too much antioxidant compound will have a negative impact on the yellowing performance of the sponge.

[0043] The beneficial technical effect of the present application is: the antioxidant compound described in the present application includes a main antioxidant (antioxidant 1135 and antioxidant 245), an auxiliary antioxidant (phosphite antioxidant 508T) and a light stabilizer system (ultraviolet absorber UV-1 and light stabilizer 292). Through the synergistic coordination of the above components, the antioxidant compound can balance the anti-core burning and anti-yellowing capabilities, so that the antioxidant compound can solve the scorching problem of sponge foaming and the yellowing problem of sponge after molding at one time by adding the antioxidant compound once. Therefore, the antioxidant compound described in the present application can be well applied in the preparation of sponges containing polyethers, and the prepared sponges have a higher initial oxidation temperature, and the anti-yellowing performance of light and gas fumigation is also better, and the application prospects are excellent. DETAILED DESCRIPTION

[0044] In order to make the present application easier to understand, the present application will be further described in detail below in conjunction with the examples, which are merely illustrative and are not intended to limit the scope of application of the present application. The raw materials or components used in the present application can be obtained through commercial routes or conventional methods unless otherwise specified.

[0045] Example 1: Preparation formula of antioxidant complex: Accurately weigh each component according to the following weight and set aside: 60 kg antioxidant 1135, 15 kg antioxidant 245, 50 kg antioxidant 508T, 60 kg ultraviolet absorber UV-1, 20 kg light stabilizer 292; wherein the weight proportions of each component in the antioxidant complex are respectively 30 parts of antioxidant 1135; 7.5 parts of antioxidant 245; 25 parts of antioxidant 508T; 30 parts of ultraviolet absorber UV-1; 10 parts of light stabilizer 292; the weight ratio of antioxidant 1135 to antioxidant 245 is 4:1, and the weight ratio of ultraviolet absorber UV-1 to light stabilizer 292 is 3:1.

[0046] Preparation: Use nitrogen to inertize the preparation kettle, add the components of the antioxidant compound weighed above into the preparation kettle, and stir and mix the components. Heat the preparation kettle to 85°C to fully melt the components and mix them evenly. After cooling to 50°C, take samples for analysis, and fill them after they are qualified to obtain the antioxidant compound.

[0047] The appearance of the prepared antioxidant composite was observed, and its dynamic viscosity and refractive index were tested. The appearance of the antioxidant composite was visually observed, the dynamic viscosity was measured according to the method described in GB / T 10247-2008, and the refractive index was measured according to the method described in GB / T6488-2008. The results are shown in Table 1.

[0048] Example 2: Preparation formula of antioxidant complex: Accurately weigh each component according to the following weight and set aside: 55 kg antioxidant 1135, 20 kg antioxidant 245, 50 kg antioxidant 508T, 60 kg ultraviolet absorber UV-1, 20 kg light stabilizer 292; wherein the weight proportions of each component in the antioxidant complex are respectively 27.5 parts of antioxidant 1135; 10 parts of antioxidant 245; 25 parts of antioxidant 508T; 30 parts of ultraviolet absorber UV-1; 10 parts of light stabilizer 292; the weight ratio of antioxidant 1135 to antioxidant 245 is 2.75:1, and the weight ratio of ultraviolet absorber UV-1 to light stabilizer 292 is 3:1.

[0049] Preparation: The preparation process is the same as in Example 1.

[0050] According to the method described in Example 1, the appearance of the prepared antioxidant composite was observed, and its dynamic viscosity and refractive index were tested. The results are shown in Table 1.

[0051] Example 3: Preparation formula of antioxidant complex: Accurately weigh each component according to the following weight and set aside: 30 kg antioxidant 1135, 7.5 kg antioxidant 245, 50 kg antioxidant 508T, 60 kg ultraviolet absorber UV-1, 20 kg light stabilizer 292; wherein the weight proportions of each component in the antioxidant complex are respectively 15 parts of antioxidant 1135; 3.75 parts of antioxidant 245; 25 parts of antioxidant 508T; 30 parts of ultraviolet absorber UV-1; 10 parts of light stabilizer 292; the weight ratio of antioxidant 1135 to antioxidant 245 is 4:1, and the weight ratio of ultraviolet absorber UV-1 to light stabilizer 292 is 3:1.

[0052] Preparation: The preparation process is the same as in Example 1.

[0053] According to the method described in Example 1, the appearance of the prepared antioxidant composite was observed, and its dynamic viscosity and refractive index were tested. The results are shown in Table 1.

[0054] Example 4: Preparation formula of antioxidant complex: Accurately weigh each component according to the following weight and set aside: 60 kg antioxidant 1135, 15 kg antioxidant 245, 20 kg antioxidant 508T, 60 kg ultraviolet absorber UV-1, 20 kg light stabilizer 292; wherein the weight proportions of each component in the antioxidant complex are respectively 30 parts of antioxidant 1135; 7.5 parts of antioxidant 245; 10 parts of antioxidant 508T; 30 parts of ultraviolet absorber UV-1; 10 parts of light stabilizer 292; the weight ratio of antioxidant 1135 to antioxidant 245 is 4:1, and the weight ratio of ultraviolet absorber UV-1 to light stabilizer 292 is 3:1.

[0055] Preparation: The preparation process is the same as in Example 1.

[0056] According to the method described in Example 1, the appearance of the prepared antioxidant composite was observed, and its dynamic viscosity and refractive index were tested. The results are shown in Table 1.

[0057] Example 5: Preparation formula of antioxidant complex: Accurately weigh each component according to the following weight and set aside: 60 kg antioxidant 1135, 15 kg antioxidant 245, 80 kg antioxidant 508T, 60 kg ultraviolet absorber UV-1, 20 kg light stabilizer 292; wherein the weight proportions of each component in the antioxidant complex are respectively 30 parts of antioxidant 1135; 7.5 parts of antioxidant 245; 40 parts of antioxidant 508T; 30 parts of ultraviolet absorber UV-1; 10 parts of light stabilizer 292; the weight ratio of antioxidant 1135 to antioxidant 245 is 4:1, and the weight ratio of ultraviolet absorber UV-1 to light stabilizer 292 is 3:1.

[0058] Preparation: The preparation process is the same as in Example 1.

[0059] According to the method described in Example 1, the appearance of the prepared antioxidant composite was observed, and its dynamic viscosity and refractive index were tested. The results are shown in Table 1.

[0060] Example 6: Preparation formula of antioxidant complex: 60 kg antioxidant 1135, 15 kg antioxidant 245, 50 kg antioxidant 508T, 50 kg ultraviolet absorber UV-1, 30 kg light stabilizer 292; wherein the weight proportions of each component in the antioxidant complex are respectively 30 parts of antioxidant 1135; 7.5 parts of antioxidant 245; 25 parts of antioxidant 508T; 25 parts of ultraviolet absorber UV-1; 15 parts of light stabilizer 292; the weight ratio of antioxidant 1135 to antioxidant 245 is 4:1, and the weight ratio of ultraviolet absorber UV-1 to light stabilizer 292 is 1.7:1.

[0061] Preparation: The preparation process is the same as in Example 1.

[0062] According to the method described in Example 1, the appearance of the prepared antioxidant composite was observed, and its dynamic viscosity and refractive index were tested. The results are shown in Table 1.

[0063] Example 7: Preparation formula of antioxidant complex: Accurately weigh each component according to the following weight and set aside: 60 kg antioxidant 1135, 15 kg antioxidant 245, 50 kg antioxidant 508T, 120 kg ultraviolet absorber UV-1, 40 kg light stabilizer 292; wherein the weight proportions of each component in the antioxidant complex are respectively 30 parts of antioxidant 1135; 7.5 parts of antioxidant 245; 25 parts of antioxidant 508T; 60 parts of ultraviolet absorber UV-1; 20 parts of light stabilizer 292; the weight ratio of antioxidant 1135 to antioxidant 245 is 4:1, and the weight ratio of ultraviolet absorber UV-1 to light stabilizer 292 is 3:1.

[0064] Preparation: The preparation process is the same as in Example 1.

[0065] According to the method described in Example 1, the appearance of the prepared antioxidant composite was observed, and its dynamic viscosity and refractive index were tested. The results are shown in Table 1.

[0066] Comparative Example 1: Preparation formula of antioxidant complex: Accurately weigh each component according to the following weight and set aside: 75 kg antioxidant 1135, 50 kg antioxidant 508T, 60 kg ultraviolet absorber UV-1, 20 kg light stabilizer 292; wherein the weight proportions of each component in the antioxidant complex are respectively 37.5 parts of antioxidant 1135; 25 parts of antioxidant 508T; 30 parts of ultraviolet absorber UV-1; 10 parts of light stabilizer 292; and the weight ratio of ultraviolet absorber UV-1 to light stabilizer 292 is 3:1.

[0067] Preparation: The preparation process is the same as in Example 1.

[0068] According to the method described in Example 1, the appearance of the prepared antioxidant composite was observed, and its dynamic viscosity and refractive index were tested. The results are shown in Table 1.

[0069] Comparative Example 2: Preparation formula of antioxidant complex: Accurately weigh each component according to the following weight and set aside: 75 kg antioxidant 245, 50 kg antioxidant 508T, 60 kg ultraviolet absorber UV-1, 20 kg light stabilizer 292; wherein the weight proportions of each component in the antioxidant complex are respectively 37.5 parts of antioxidant 245; 25 parts of antioxidant 508T; 30 parts of ultraviolet absorber UV-1; 10 parts of light stabilizer 292; and the weight ratio of ultraviolet absorber UV-1 to light stabilizer 292 is 3:1.

[0070] Preparation: The preparation process is the same as in Example 1.

[0071] According to the method described in Example 1, the appearance of the prepared antioxidant composite was observed, and its dynamic viscosity and refractive index were tested. The results are shown in Table 1.

[0072] Comparative Example 3: Preparation formula of antioxidant complex: Accurately weigh each component according to the following weight and set aside: 60 kg antioxidant 1135, 15 kg antioxidant 245, 50 kg antioxidant 508T, 80 kg ultraviolet absorber UV-1; wherein the weight proportions of each component in the antioxidant complex are respectively 30 parts of antioxidant 1135; 7.5 parts of antioxidant 245; 25 parts of antioxidant 508T; 40 parts of ultraviolet absorber UV-1; and the weight ratio of antioxidant 1135 to antioxidant 245 is 4:1.

[0073] Preparation: The preparation process is the same as in Example 1.

[0074] According to the method described in Example 1, the appearance of the prepared antioxidant composite was observed, and its dynamic viscosity and refractive index were tested. The results are shown in Table 1.

[0075] Comparative Example 4: Preparation formula of antioxidant complex: Accurately weigh each component according to the following weight and set aside: 60 kg antioxidant 1135, 15 kg antioxidant 245, 50 kg antioxidant 508T, 80 kg light stabilizer 292; wherein the weight proportions of each component in the antioxidant complex are respectively 30 parts of antioxidant 1135; 7.5 parts of antioxidant 245; 25 parts of antioxidant 508T; 40 parts of light stabilizer 292; and the weight ratio of antioxidant 1135 to antioxidant 245 is 4:1.

[0076] Preparation: The preparation process is the same as in Example 1.

[0077] According to the method described in Example 1, the appearance of the prepared antioxidant composite was observed, and its dynamic viscosity and refractive index were tested. The results are shown in Table 1.

[0078] Table 1

[0079] As can be seen from Table 1, the antioxidant compounds prepared in the present application are all liquid, have low viscosity, and are easy to add.

[0080] Test Example 1

[0081] The antioxidant complexes in Examples 1-7 and Comparative Examples 1-4 were added to polyether to prepare different sponges, and the amount of antioxidant complex added was 3000 ppm. The initial oxidation temperature of the sponge, the light yellowness index caused by ultraviolet rays, and the gas yellowness index caused by nitrogen oxides were detected, and the results are shown in Table 2. Among them, a differential scanning calorimeter (DSC) was used to test the initial oxidation temperature of the sponge. The test conditions were: in an oxygen atmosphere, the initial temperature was 50°C, the temperature was increased at a heating rate of 10°C / min, the sample mass was 5 mg, and the operation was stopped after the exothermic peak was observed, and the temperature at which the oxidation reaction started was measured. The test method for the yellowing index caused by ultraviolet rays is: place the sponge under natural light, and test the yellowness index of the sponge after 8 hours. The test method for the gas yellowness index is: wrap sponges with different antioxidant formulas with white cotton cloth, NO x 50ppm, 40℃, 48h, test the yellowness index of cotton cloth.

[0082] Table 2

[0083] Initial oxidation temperature (℃) Light yellowing index Gas Yellow Index Example 1 223.7 0.84 0.51 Example 2 219.3 0.93 0.58 Example 3 215.1 1.27 0.73 Example 4 212.5 1.39 0.94 Example 5 216.8 1.15 0.69 Example 6 213.2 1.31 0.85 Example 7 218.4 0.99 0.62 Comparative Example 1 204.5 1.58 1.07 Comparative Example 2 198.2 1.69 1.16 Comparative Example 3 192.6 1.83 1.28 Comparative Example 4 187.4 2.04 1.41

[0084] As can be seen from Table 2, compared with the sponge prepared by adding the antioxidant compound prepared by Comparative Examples 1-4, the sponge prepared by adding the antioxidant compound prepared by Examples 1-7 has a higher initial oxidation temperature, which can reach up to 223.7°C, and a lower light yellowing index and gas yellowing index. This indicates that compared with the antioxidant compound prepared by Comparative Examples 1-4, the antioxidant compound prepared in Examples 1-7 of the present application has better anti-burning performance and anti-yellowing performance.

[0085] In addition, the sponge prepared by adding the antioxidant compound prepared in Example 1 has the best anti-burning performance and anti-yellowing performance, indicating that the optimal formula of the antioxidant compound is: in parts by weight, 30 parts of antioxidant 1135; 7.5 parts of antioxidant 245; 25 parts of antioxidant 508T; 30 parts of ultraviolet absorber UV-1; 10 parts of light stabilizer 292; the weight ratio of antioxidant 1135 to antioxidant 245 is 4:1, and the weight ratio of ultraviolet absorber UV-1 to light stabilizer 292 is 3:1.

[0086] It should be noted that the embodiments described above are only used to explain the present application and do not constitute any limitation to the present application. The present application is described with reference to typical embodiments, but it should be understood that the words used therein are descriptive and explanatory words, rather than restrictive words. The present application may be modified as specified within the scope of the claims of the present application, and the present invention may be revised without departing from the scope and spirit of the present application. Although the present application described therein relates to specific methods, materials and embodiments, it does not mean that the present application is limited to the specific examples disclosed therein. On the contrary, the present application can be extended to all other methods and applications with the same functions.

Claims

1. An antioxidant compound having both anti-burning and anti-yellowing properties, characterized in that: The antioxidant compound comprises the following components in parts by weight: Hindered phenol antioxidant 6-60 parts; 20-30 parts of phosphite antioxidant; 25~65 parts of ultraviolet absorber; 5-45 parts of hindered amine light stabilizer; The hindered phenol antioxidant comprises antioxidant 1135 and antioxidant 245; and based on the weight of the antioxidant complex, the weight of the antioxidant 1135 is 20 to 40 parts, and the weight of the antioxidant 245 is 1 to 10 parts; and the weight ratio of the antioxidant 1135 to the antioxidant 245 is 4:1; The phosphite antioxidant is antioxidant 508T, the ultraviolet absorber is ultraviolet absorber UV-1, and the hindered amine light stabilizer is light stabilizer 292.

2. The antioxidant compound according to claim 1, characterized in that The weight proportion of the ultraviolet absorber UV-1 is 25 to 35 parts, the weight proportion of the light stabilizer 292 is 8 to 10 parts; and the weight ratio of the ultraviolet absorber UV-1 to the light stabilizer 292 is (3 to 4):

1.

3. The antioxidant compound according to claim 2, characterized in that The weight ratio of the ultraviolet absorber UV-1 to the light stabilizer 292 is 3:

1.

4. A method for preparing the antioxidant complex according to any one of claims 1 to 3, characterized in that: The method comprises: under the protection of inert gas, mixing the components of the antioxidant compound, heating until the components are melted, mixing evenly and cooling to obtain the antioxidant compound.

5. The method according to claim 4, characterized in that The heating temperature is 80-85°C.

6. Use of the antioxidant compound according to any one of claims 1 to 3 or the antioxidant compound prepared by the method according to claim 4 or 5 added to polyether for preparing sponge.

7. A sponge containing polyether, characterized in that: The polyether is added with the antioxidant compound according to any one of claims 1 to 3 or the antioxidant compound prepared by the method according to claim 4 or 5.

8. The sponge according to claim 7, characterized in that The added amount of the antioxidant complex in the polyether is 3000-4000 ppm.

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