A type of aging-resistant, high-elasticity polyurethane foam for automotive seats and its preparation process.

Abstract

This invention discloses an aging-resistant, high-elasticity polyurethane foam for automotive seats, comprising the following raw materials by weight: 80-100 parts of low-odor, high-activity polyether polyol; and a preparation process for the aging-resistant, high-elasticity polyurethane foam for automotive seats, including the following steps: preparation of component A, preparation of component B, foaming and molding, curing treatment, and cutting and quality inspection. This invention features excellent aging resistance, achieving a good balance between high elasticity and low creep, with no significant collapse after long-term use, balancing support and seating comfort; excellent environmental performance and processing compatibility, using low-cyclic, reactive additives to effectively reduce VOC emissions and odor, meeting automotive interior environmental standards; and controllable preparation process parameters, suitable for continuous industrial production; strong performance stability, with uniform and dense cell structure, free from defects such as shrinkage cavities and collapse, and small batch-to-batch performance fluctuations, stably adapting to the needs of large-scale automotive seat manufacturing, and has broad application prospects.

Description

Technical Field

[0001] This invention belongs to the field of polyurethane material technology, specifically relating to an aging-resistant, high-elasticity polyurethane foam for automotive seats and its preparation process. It is suitable for core components such as driver and passenger seats, headrests, and lumbar supports in automobiles. It can withstand high cabin temperatures, sunlight, humid heat cycles, and long-term static compression for extended periods, maintaining excellent resilience and low deformation, thus meeting the comfort and reliability requirements of automotive seats throughout their entire life cycle. Background Technology

[0002] As a core functional material for passenger contact, polyurethane foam in automotive seats must simultaneously possess high resilience, low compression set, excellent aging resistance, and long-term support. With the increasing complexity of cabin conditions in new energy vehicles, such as exposure to sunlight and prolonged operation of smart cabins, the durability requirements for seats are rising. Traditional foams, however, have significant technological limitations. Firstly, it has insufficient aging resistance: conventional sponges rely on small-molecule antioxidants / light stabilizers, which are prone to migration and volatilization. After long-term exposure to high temperatures above 100°C or ultraviolet light, they are prone to yellowing, increased hardness, and a sharp drop in resilience (resilience drops by ≥30% after 1000h of heat aging). Moreover, after humid heat aging, the permanent compression deformation deteriorates significantly, which cannot meet the needs of the entire life cycle of seats (8-10 years).

[0003] Secondly, it is difficult to achieve both high elasticity and low deformation: High-resilience foam often improves support through high cross-linking, but excessive cross-linking will lead to network stiffness and increased brittleness after aging. Low-cross-linked foam, although soft, is prone to long-term compression collapse, with permanent deformation of ≥8% at 75% compression, which cannot maintain the long-term fit of the seat.

[0004] Third, the matching degree between process and performance is low: existing preparation processes mostly focus on optimizing a single foaming parameter, without forming a synergistic control system of formula, process, aging resistance and elasticity. As a result, under long-term static compression and high and low temperature cycling, the foam cell walls are prone to breakage, the performance degrades quickly, and the stability of industrial mass production is poor.

[0005] In summary, a new type of aging-resistant, high-elasticity sponge with synergistic formulation and process has been developed to solve the problems of poor aging resistance and imbalance between elasticity and durability in traditional sponges, making it suitable for the demanding application scenarios of automotive seats. Summary of the Invention

[0006] To address the shortcomings and defects in existing technologies, this invention proposes an aging-resistant, high-elasticity polyurethane foam for automotive seats and its preparation process. This invention overcomes the deficiencies of existing technologies and achieves the following: after long-term heat, light, and humid heat aging, the rebound rate is maintained at ≥85%, and the compression set is ≤5%; the initial rebound rate is ≥50%, and the compression set is ≤4% at 75%; the process is simple, the cost is controllable, it is suitable for industrial mass production, and it meets the performance requirements of automotive seats throughout their entire life cycle.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A type of aging-resistant, highly elastic polyurethane foam for automotive seats, comprising the following raw materials by weight: 80-100 parts of low-odor, high-activity polyether polyol, 20-40 parts of polymer polyol, 3-8 parts of reactive antioxidant-light stabilizer, 1.5-3 parts of crosslinking agent, 0.5-1.2 parts of low-cyclic polyether modified silicone oil, 0.8-2 parts of cell opener, 0.8-2.2 parts of catalyst, 3.5-5.5 parts of foaming agent, and 60-90 parts of isocyanate; optionally, it contains 1-2 parts of environmentally friendly colorant.

[0008] Preferably, the low-odor, high-activity polyether polyol has a number average molecular weight of 5000-7000, a functionality of 3, a primary hydroxyl content of ≥85%, and an unsaturation of ≤0.05mmol / g. As a soft segment matrix, it provides a high resilience base, reduces unreacted residues, and lowers VOCs. The polymer polyol has a solid content of 25-40% and a hydroxyl value of 18-26mgKOH / g. The grafted polymer particles are uniformly dispersed on the cell walls, improving network strength and creep resistance, and reducing long-term compression collapse.

[0009] Preferably, the reactive antioxidant-light stabilizer contains hydroxyl and amino reaction sites, which are covalently bound to isocyanate. Its main function is to prevent migration and loss, and synergistically improve resistance to heat, light, and damp heat aging, with a performance retention rate increased by more than 40% after aging. The crosslinking agent is a compound of diethanolamine and trimethylolpropane in a mass ratio of 2:1, which precisely controls the crosslinking density, balances elasticity and support, and avoids the network being too stiff or too soft.

[0010] Preferably, the low-cyclic polyether modified silicone oil is non-hydrolyzable, which can stabilize the cell interface, improve the open cell ratio, reduce shrinkage cavities, and reduce cyclic volatility, thus meeting the environmental protection requirements of automotive interiors; the isocyanate is selected from a blend of modified MDI and liquefied MDI, with an NCO index of 105-115, which can improve hydrolysis resistance and aging resistance while maintaining elasticity.

[0011] An aging-resistant, highly elastic polyurethane foam for automotive seats and its preparation process, comprising the following steps: Step S1, Preparation of Component A: Weigh the low-odor, high-activity polyether, polymer polyol, reactive antioxidant-light stabilizer, crosslinking agent, low-cyclic polyether modified silicone oil, and pore-opening agent according to the formula, and stir thoroughly at 500-800 r / min for 8-15 min at 25-35℃. After adding the catalyst, stir at 600-900 r / min for 10-18 min, and then degas under vacuum for 15-25 min to obtain Component A. Step S2, Preparation of Component B: Preheat the isocyanate to 30-40℃ and maintain this temperature under nitrogen protection until ready for use. Moisture content ≤0.05%. Step S3, foaming and molding: Mix component A and component B at a mass ratio of 100:25-40 using a high-pressure foaming machine mixing head at a speed of 1500-2000 r / min. After mixing, quickly inject the mixture into a mold preheated to 45-60℃. After closing the mold, foam for 25-40 seconds, hold pressure for 180-240 seconds, and then open the mold to obtain the sponge blank. Step S4, Curing treatment: Cur the sponge blank at a temperature of 50-70℃ for 36-60h. Remove the cured sponge blank from the oven and allow it to cool naturally to room temperature (25±5℃) for 2-4h to avoid shrinkage and deformation of the sponge due to sudden temperature drop. The curing temperature and time directly affect the crosslinking density. A curing temperature of 50-70℃ for 36-60h can stabilize the network structure and reduce the later performance degradation.

[0012] Step S5, Cutting and Quality Inspection: The cooled sponge blank is cut into sponge products that meet the size requirements of car seats; then the cut sponge is subjected to performance tests, including resilience, compression set, aging resistance, VOC and odor, etc. After passing the tests, the aging-resistant and highly elastic car seat polyurethane sponge product is obtained.

[0013] Preferably, in step S1, the vacuum degassing of component A is performed using a vacuum degassing kettle.

[0014] Preferably, in step S1, the reactive antioxidant-light stabilizer is premixed with the polyol in advance to ensure uniform dispersion and avoid local agglomeration that affects performance.

[0015] Preferably, both component A and component B are mixed at high speed using a high-pressure foaming machine mixing head.

[0016] Preferably, in step S3, the NCO index of the isocyanate is strictly controlled between 105 and 115. If it is too high, the sponge will be too hard and its elasticity will decrease; if it is too low, its aging resistance and support will be insufficient.

[0017] Compared with the prior art, the beneficial effects of this invention are as follows: 1. Excellent aging resistance: The reactive stabilizer is covalently bonded and does not migrate. After 1000 hours of heat aging at 120℃, the rebound rate is maintained at ≥88%. After 200 hours of damp heat aging at 95%RH / 85℃, the compression set is ≤4.5%. After 500 hours of UV aging, the yellowing level is ≤1, meeting the requirements of the entire life cycle of the seat.

[0018] 2. Balance between high elasticity and low creep: initial rebound rate ≥52%, 75% compression permanent deformation ≤3.8%, no obvious collapse after long-term use, combining support and comfort.

[0019] 3. Environmental protection and processing compatibility: Low-cyclic and reactive additives reduce VOCs and odors, meeting the environmental protection requirements of automotive interiors. The process parameters are controllable and suitable for industrial continuous production.

[0020] 4. Strong performance stability: The foam cells are uniform and dense, without shrinkage cavities or collapse defects, and the performance fluctuations between batches are small, making it suitable for large-scale manufacturing of automotive seats. Detailed Implementation

[0021] The present invention will be further described clearly and completely below with reference to the embodiments, but these embodiments do not limit the scope of protection of the present invention. The described embodiments are only some embodiments of the present invention, and not all embodiments. Example

[0022] A type of aging-resistant, highly elastic polyurethane foam for automotive seats comprises the following raw materials by weight: 90 parts of low-odor, high-activity polyether polyol, 30 parts of polymer polyol, 5.5 parts of reactive antioxidant-light stabilizer, 2.2 parts of crosslinking agent, 0.8 parts of low-cyclic polyether modified silicone oil, 1.4 parts of cell opener, 1.5 parts of catalyst, 4.5 parts of foaming agent, 75 parts of isocyanate, and 1.5 parts of environmentally friendly colorant.

[0023] The low-odor, high-activity polyether polyol has a number-average molecular weight of 6000, a functionality of 3, a primary hydroxyl content of 88%, and an unsaturation of 0.04 mmol / g. The polymer polyol has a solid content of 32% and a hydroxyl value of 22 mg KOH / g. The reactive antioxidant-light stabilizer contains hydroxyl and amino reactive sites and is covalently bonded to isocyanate. The crosslinking agent is a mixture of diethanolamine and trimethylolpropane in a mass ratio of 2:1. The low-cyclic polyether modified silicone oil is non-hydrolyzable. The isocyanate is selected from a mixture of modified MDI and liquefied MDI, with an NCO index of 110.

[0024] A process for preparing aging-resistant, highly elastic polyurethane foam for automotive seats includes the following steps: Step S1, Preparation of Component A: Weigh out the low-odor, high-activity polyether, polymer polyol, reactive antioxidant-light stabilizer, crosslinking agent, low-cyclic polyether modified silicone oil, and pore-opening agent according to the formula, and stir thoroughly at 650 r / min for 12 min at 30°C. After adding the catalyst, stir at 750 r / min for 14 min, and then vacuum degas in a vacuum degassing kettle for 20 min to obtain Component A; Step S2, Preparation of component B: Preheat the isocyanate to 35°C and keep it at that temperature under nitrogen protection for later use; moisture content ≤0.05%; Step S3, foaming molding: Component A and component B are mixed at a mass ratio of 100:32 at a high speed of 1750 r / min. After mixing, the mixture is quickly injected into a mold preheated to 52°C. After closing the mold, foaming is performed for 32 seconds, and pressure is maintained for 210 seconds before opening the mold to obtain a sponge blank. Step S4, curing treatment: Cur the sponge blank at 60℃ for 48 hours. Remove the cured sponge blank from the oven and allow it to cool naturally to room temperature of 25℃ for 3 hours to avoid shrinkage and deformation of the sponge due to sudden temperature drop.

[0025] Step S5, Cutting and Quality Inspection: The cooled sponge blank is cut and processed into sponge products that meet the size requirements of car seats; after testing, the resilience, compression set, aging resistance, VOC and odor all meet the requirements, and the aging-resistant and highly elastic car seat polyurethane sponge product is obtained. Example

[0026] A type of aging-resistant, highly elastic polyurethane foam for automotive seats comprises the following raw materials by weight: 80 parts of low-odor, high-activity polyether polyol, 20 parts of polymer polyol, 3 parts of reactive antioxidant-light stabilizer, 1.5 parts of crosslinking agent, 0.5 parts of low-cyclic polyether modified silicone oil, 0.8 parts of cell opener, 0.8 parts of catalyst, 3.5 parts of foaming agent, 60 parts of isocyanate, and 1 part of environmentally friendly colorant.

[0027] The low-odor, high-activity polyether polyol has a number average molecular weight of 5000, a functionality of 3, a primary hydroxyl content of 85%, an unsaturation of 0.05 mmol / g, a polymer polyol solid content of 25%, and a hydroxyl value of 18 mg KOH / g. The reactive antioxidant-light stabilizer contains hydroxyl and amino reactive sites and is covalently bonded to isocyanate. The crosslinking agent is a mixture of diethanolamine and trimethylolpropane in a mass ratio of 2:1. The low-cyclic polyether modified silicone oil is non-hydrolyzable, and the isocyanate is selected from a mixture of modified MDI and liquefied MDI with an NCO index of 105.

[0028] A process for preparing aging-resistant, highly elastic polyurethane foam for automotive seats includes the following steps: Step S1, Preparation of Component A: Weigh out the low-odor, high-activity polyether, polymer polyol, reactive antioxidant-light stabilizer, crosslinking agent, low-cyclic polyether modified silicone oil, and pore-opening agent according to the formula, and stir thoroughly at 500 r / min for 8 min at 25°C. After adding the catalyst, stir at 600 r / min for 10 min, and then vacuum degas in a vacuum degassing kettle for 15 min to obtain Component A; Step S2, Preparation of component B: Preheat the isocyanate to 30°C and keep it at that temperature under nitrogen protection for later use; moisture content ≤0.05%; Step S3, foaming and molding: Mix component A and component B at a mass ratio of 100:25 at a high speed of 1500 r / min. After mixing, quickly inject the mixture into a mold preheated to 45°C. After closing the mold, foam for 25 seconds, hold pressure for 180 seconds, and then open the mold to obtain a sponge blank. Step S4, curing treatment: Cur the sponge blank at 50℃ for 36 hours. Remove the cured sponge blank from the oven and allow it to cool naturally to room temperature of 20℃ for 2 hours to avoid shrinkage and deformation of the sponge due to sudden temperature drop.

[0029] Step S5, Cutting and Quality Inspection: The cooled sponge blank is cut and processed into sponge products that meet the size requirements of car seats; after testing, the resilience, compression set, aging resistance, VOC and odor all meet the requirements, and the aging-resistant and highly elastic car seat polyurethane sponge product is obtained. Example

[0030] A type of aging-resistant, highly elastic polyurethane foam for automotive seats comprises the following raw materials by weight: 100 parts of low-odor, high-activity polyether polyol, 40 parts of polymer polyol, 8 parts of reactive antioxidant-light stabilizer, 3 parts of crosslinking agent, 1.2 parts of low-cyclic polyether modified silicone oil, 2 parts of cell opener, 2.2 parts of catalyst, 5.5 parts of foaming agent, 90 parts of isocyanate, and 2 parts of environmentally friendly colorant.

[0031] The low-odor, high-activity polyether polyol has a number-average molecular weight of 7000, a functionality of 3, a primary hydroxyl content of 90%, an unsaturation of 0.03 mmol / g, a polymer polyol solid content of 40%, and a hydroxyl value of 26 mg KOH / g. The reactive antioxidant-light stabilizer contains hydroxyl and amino reactive sites and is covalently bonded to isocyanate. The crosslinking agent is a mixture of diethanolamine and trimethylolpropane in a mass ratio of 2:1. The low-cyclic polyether modified silicone oil is non-hydrolyzable, and the isocyanate is selected from a mixture of modified MDI and liquefied MDI with an NCO index of 115.

[0032] A process for preparing aging-resistant, highly elastic polyurethane foam for automotive seats includes the following steps: Step S1, Preparation of Component A: Weigh the low-odor, high-activity polyether, polymer polyol, reactive antioxidant-light stabilizer, crosslinking agent, low-cyclic polyether modified silicone oil, and pore-opening agent according to the formula, and stir thoroughly at 800 r / min for 15 min at 35°C. After adding the catalyst, stir at 900 r / min for 18 min and degas under vacuum for 25 min to obtain Component A. Step S2, Preparation of component B: Preheat the isocyanate to 40°C and keep it at that temperature under nitrogen protection for later use; moisture content ≤0.05%; Step S3, foaming and molding: Mix component A and component B at a mass ratio of 100:40 at a high speed of 2000 r / min. After mixing, quickly inject the mixture into a mold preheated to 60°C. After closing the mold, foam for 40 seconds, hold pressure for 240 seconds, and then open the mold to obtain a sponge blank. Step S4, curing treatment: Cur the sponge blank at 70℃ for 60 hours. Remove the cured sponge blank from the oven and allow it to cool naturally to room temperature of 30℃ for 4 hours to avoid shrinkage and deformation of the sponge due to sudden temperature drop.

[0033] Step S5, Cutting and Quality Inspection: The cooled sponge blank is cut and processed into sponge products that meet the size requirements of car seats; after testing, the resilience, compression set, aging resistance, VOC and odor all meet the requirements, and the aging-resistant and highly elastic car seat polyurethane sponge product is obtained.

[0034] Comparative Example 1 (Deficiency-Reactive Antioxidant-Light Stabilizer): The formulation is the same as in Example 1, consisting of 90 parts of low-odor, high-elasticity polyether polyol, 30 parts of polymer polyol, a non-reactive antioxidant-light stabilizer, 2.2 parts of crosslinking agent, 0.8 parts of low-cyclic polyether modified silicone oil, 1.4 parts of cell opener, 1.5 parts of catalyst, 4.5 parts of foaming agent, 75 parts of isocyanate, and 1.5 parts of environmentally friendly color paste. The reactive stabilizer is replaced with conventional antioxidant 1010 (5 parts).

[0035] The low-odor, high-activity polyether polyol has a number-average molecular weight of 6000, a functionality of 3, a primary hydroxyl content of 88%, an unsaturation of 0.04 mmol / g, a polymer polyol solid content of 32%, and a hydroxyl value of 22 mg KOH / g. The reactive antioxidant-light stabilizer contains hydroxyl and amino reactive sites and is covalently bonded to isocyanate. The crosslinking agent is a mixture of diethanolamine and trimethylolpropane in a mass ratio of 2:1. The low-cyclic polyether modified silicone oil is non-hydrolyzable, and the isocyanate is selected from a mixture of modified MDI and liquefied MDI with an NCO index of 110.

[0036] The preparation process is exactly the same as in Example 1.

[0037] Performance defects: The aging resistance is significantly reduced. After 1000 hours of xenon lamp aging test, the sponge turns yellow and becomes brittle, the resilience decreases by ≥30%, and the permanent compression deformation is ≥25%, which does not meet the aging resistance requirements of automotive seat sponges. Moreover, cracking and powdering are likely to occur after long-term use. This highlights the decisive role of reactive antioxidant-light stabilizers in the aging resistance of sponges.

[0038] Comparative Example 2 (NCO index deviates from the range, process parameters are abnormal): The formulation is exactly the same as in Example 1, except that the NCO index of the isocyanate is adjusted to 95 (lower than the 105-115 defined in the claims).

[0039] In its preparation process, in step S3, the mold preheating temperature is adjusted to 35℃ (lower than 45-60℃), and the remaining steps are the same as in Example 1.

[0040] Performance defects: Insufficient foaming results in numerous pores and voids within the sponge, leading to uneven density; extremely poor elasticity, with a rebound rate ≤35% and permanent compression set ≥30%; decreased aging resistance, excessive VOC content, and an odor level ≥4, failing to meet the high elasticity and low odor requirements of automotive seat sponges. Furthermore, the sponge exhibits unstable mechanical properties, making it prone to deformation and collapse. Deviations from the NCO index and mold preheating temperature highlight the impact of process parameters and isocyanate ratios on the sponge molding quality and mechanical properties.

[0041] In summary, as demonstrated by Examples 1-3 and Comparative Examples 1-2, this invention, through reactive stabilizers, precise crosslinking density, appropriate NCO index, and synergistic processes, exhibits excellent aging resistance, achieving a good balance between high elasticity and low creep. It shows no significant collapse after long-term use, balancing support and ride comfort. Furthermore, it demonstrates excellent environmental performance and processing compatibility, employing low-cyclic, reactive additives to effectively reduce VOC emissions and odor, meeting automotive interior environmental standards. The preparation process parameters are controllable, suitable for continuous industrial production. It also exhibits strong performance stability, with uniform and dense cell structure, free from defects such as shrinkage cavities and collapse, and minimal batch-to-batch performance fluctuations. It can stably meet the needs of large-scale automotive seat manufacturing and has broad application prospects.

[0042] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A type of aging-resistant, highly elastic polyurethane foam for automotive seats, characterized in that: It includes the following raw materials by weight: 80-100 parts of low-odor, high-activity polyether polyol, 20-40 parts of polymer polyol, 3-8 parts of reactive antioxidant-light stabilizer, 1.5-3 parts of crosslinking agent, 0.5-1.2 parts of low-cyclic polyether modified silicone oil, 0.8-2 parts of cell opener, 0.8-2.2 parts of catalyst, 3.5-5.5 parts of foaming agent, and 60-90 parts of isocyanate; optionally, it contains 1-2 parts of environmentally friendly colorant.

2. The aging-resistant, high-elasticity polyurethane foam for automotive seats according to claim 1, characterized in that, The low-odor, high-activity polyether polyol has a number average molecular weight of 5000-7000, a functionality of 3, a primary hydroxyl content of ≥85%, and an unsaturation of ≤0.05mmol / g. The polymer polyol has a solid content of 25-40% and a hydroxyl value of 18-26mgKOH / g.

3. The aging-resistant, high-elasticity polyurethane foam for automotive seats according to claim 1, characterized in that, The reactive antioxidant-light stabilizer contains hydroxyl and amino reaction sites and is covalently bonded to isocyanate. The crosslinking agent is a mixture of diethanolamine and trimethylolpropane in a mass ratio of 2:

1.

4. The aging-resistant, high-elasticity polyurethane foam for automotive seats and its preparation process according to claim 1, characterized in that, The low-cyclic polyether modified silicone oil is non-hydrolyzable, and the isocyanate is selected from a blend of modified MDI and liquefied MDI, with an NCO index of 105-115.

5. A preparation process for an aging-resistant, high-elasticity automotive seat polyurethane foam according to any one of claims 1-4, characterized in that, Includes the following steps: Step S1, Preparation of Component A: Weigh the low-odor, high-activity polyether, polymer polyol, reactive antioxidant-light stabilizer, crosslinking agent, low-cyclic polyether modified silicone oil, and pore-opening agent according to the formula, and stir thoroughly at 500-800 r / min for 8-15 min at 25-35℃. After adding the catalyst, stir at 600-900 r / min for 10-18 min, and then degas under vacuum for 15-25 min to obtain Component A. Step S2, Preparation of component B: Preheat the isocyanate to 30-40℃ and keep it at this temperature under nitrogen protection for later use; moisture content ≤0.05%; Step S3, foaming and molding: Mix component A and component B at a mass ratio of 100:25-40 at a high speed of 1500-2000 r / min. After mixing, quickly inject the mixture into a mold preheated to 45-60℃. After closing the mold, foam for 25-40s, hold pressure for 180-240s, and then open the mold to obtain the sponge blank. Step S4, curing treatment: Cur the sponge blank at a temperature of 50-70℃ for 36-60 hours. Remove the cured sponge blank from the oven and allow it to cool naturally to room temperature (25±5℃) for 2-4 hours to avoid shrinkage and deformation of the sponge due to a sudden drop in temperature.

6. Step S5, Cutting and Quality Inspection: The cooled sponge blank is cut into sponge products that meet the size requirements of car seats; then the cut sponge is subjected to performance tests, including resilience, compression set, aging resistance, VOC and odor, etc. After passing the tests, the aging-resistant and highly elastic car seat polyurethane sponge product is obtained.

7. The preparation process of an aging-resistant, high-elasticity automotive seat polyurethane foam according to claim 5, characterized in that, In step S1, the component A is degassed using a vacuum degassed vessel.

8. The aging-resistant, high-elasticity polyurethane foam for automotive seats and its preparation process according to claim 5, characterized in that, In step S1, the reactive antioxidant-light stabilizer is premixed with the polyol in advance to ensure uniform dispersion.

9. The aging-resistant, high-elasticity polyurethane foam for automotive seats and its preparation process according to claim 5, characterized in that, Both component A and component B are mixed at high speed using a high-pressure foaming machine mixing head.

10. The aging-resistant, high-elasticity polyurethane foam for automotive seats and its preparation process according to claim 5, characterized in that, In step S3, the NCO index of the isocyanate is strictly controlled between 105 and 115.