Wet-skid-resistant resin as well as preparation method and application thereof

Abstract

The invention discloses wet-skid-resistant resin as well as a preparation method and application thereof, and belongs to the field of rubber additives. The wet-skid-resistant resin is prepared from the following raw materials in parts by weight: 30-50 parts of hydrogenated C5 petroleum resin; 25 to 38 parts of hydrogenated C9 petroleum resin; 6 to 10.5 parts of modified C5 petroleum resin; the modified C5 petroleum resin is formed by graft polymerization of C5 petroleum resin and p-tert-butylstyrene. The preparation method of the wet-skid-resistant resin comprises the following steps: carrying out graft polymerization on C5 petroleum resin and p-tert-butylstyrene to obtain modified C5 petroleum resin, and mixing the modified C5 petroleum resin with hydrogenated C5 petroleum resin and hydrogenated C9 petroleum resin to obtain the wet-skid-resistant resin. The tire provided by the invention has the advantage of improving the wet skid resistance and the ice surface gripping force of the tire.

Description

Technical Field

[0001] This application relates to the field of rubber additives, and in particular to an anti-slip resin, its preparation method, and its application. Background Technology

[0002] With the continuous development of the transportation industry, the performance requirements for rubber products such as tires are becoming increasingly stringent, among which anti-skid performance is one of the key factors in ensuring driving safety. Good anti-skid performance can effectively reduce vehicle slippage on wet roads and ensure driving safety.

[0003] To improve the wet skid resistance of rubber materials, anti-skid resins are typically added to tire rubber formulations. These resins mainly include terpene resins, petroleum resins, and styrene resins, with C5 and C9 petroleum resins being the primary types. Both C5 and C9 petroleum resins have tackifying properties, effectively improving the mechanical and dynamic characteristics of the rubber compound and allowing for the formulation of tire rubber materials with appropriate wet skid resistance. Furthermore, because the monomers for C5 and C9 petroleum resins can be obtained from byproducts of the petroleum industry, their applications are more widespread.

[0004] However, while C5 and C9 petroleum resins can effectively improve tire grip on wet surfaces when used as anti-skid resins, their grip on ice surfaces is reduced in cold winter regions, limiting their application scenarios. Summary of the Invention

[0005] To improve the anti-skid ability and grip on ice surfaces of tires, this application provides an anti-skid resin, its preparation method, and its application.

[0006] Firstly, the anti-slip resin provided in this application adopts the following technical solution: An anti-slip resin is prepared from raw materials comprising the following parts by weight: 30-50 parts of hydrogenated C5 petroleum resin; 25-38 parts of hydrogenated C9 petroleum resin; 6-10.5 parts of modified C5 petroleum resin; The modified C5 petroleum resin is obtained by graft polymerization of C5 petroleum resin and p-tert-butylstyrene.

[0007] By adopting the above technical solutions, hydrogenated C5 and hydrogenated C9 petroleum resins are saturated by hydrogenation, improving the thermal stability and weather resistance of the petroleum resins. p-tert-butylstyrene is grafted onto C5 petroleum resin (referring to unhydrogenated C5 petroleum resin). The unsaturated carbon-carbon double bonds in the C5 petroleum resin are grafted onto p-tert-butylstyrene. The fluidity of the C5 petroleum resin facilitates the dispersion of p-tert-butylstyrene in the resin structure system formed by the hydrogenated C5 and hydrogenated C9 petroleum resins. The rigid benzene ring structure provided by p-tert-butylstyrene adjusts the rigidity and toughness of the rubber system to a suitable level. Furthermore, the grafted p-tert-butylstyrene provides tert-butyl groups embedded in the petroleum resin and rubber segments, improving the low-temperature toughness of the rubber. This helps the tire embed itself into the tiny uneven structures on the ice surface, thereby improving both wet grip and ice traction.

[0008] Optionally, in the raw materials for preparing the modified C5 petroleum resin, the mass ratio of C5 petroleum resin to p-tert-butylstyrene is 1:(0.14~0.20).

[0009] By adopting the above technical solution, the mass ratio of C5 petroleum resin to p-tert-butylstyrene can control the degree to which the benzene ring structure is incorporated into the C5 petroleum resin, so that the modified C5 petroleum resin retains its toughness while having appropriate rigidity, and obtains compatibility with hydrogenated C5 petroleum resin and hydrogenated C9 petroleum resin, thereby playing a role in improving the anti-slip ability of rubber.

[0010] Optionally, the raw materials for preparing the modified C5 petroleum resin also include a Lewis acid catalyst.

[0011] By adopting the above technical solution, the grafting polymerization of tert-butylstyrene is achieved through cationic polymerization, which helps to achieve orderly grafting of tert-butylstyrene and control the degree of polymerization, thereby obtaining modified C5 petroleum resin with appropriate molecular weight, maintaining the fluidity of modified C5 petroleum resin, and enabling the anti-skid resin to be effectively embedded in the soft segments of tire rubber, thus improving the anti-skid ability.

[0012] Optionally, the C5 petroleum resin contains 25-28 wt% mesopentadiene and 7-10 wt% isoprene.

[0013] By adopting the above technical solution and using isoprene and isoprene within the above content range, the proportion of long-chain macromolecules in C5 petroleum resin is balanced, so that C5 petroleum resin can maintain good fluidity while being able to be well grafted and polymerized with p-tert-butylstyrene, thus exerting anti-slip ability.

[0014] Optionally, the molecular weight of the C5 petroleum resin is 1800-2000.

[0015] The molecular weights mentioned above are number-average molecular weights.

[0016] By adopting the above technical solution and using C5 petroleum resin with the above molecular weight range, it is suitable for good graft polymerization with p-tert-butylstyrene.

[0017] Secondly, the method for preparing an anti-slip resin provided in this application adopts the following technical solution: A method for preparing an anti-slip resin includes the following steps: C5 petroleum resin and a portion of p-tert-butylstyrene were dispersed in a first solvent to obtain a first reactant mixture. The Lewis acid catalyst is dispersed in a second solvent to obtain a catalyst mixture; The remaining p-tert-butylstyrene was dispersed in a third solvent to obtain a second reactant mixture; At 0~20℃, the catalyst mixture was added dropwise to the first reactant mixture. After the catalyst mixture was added, the second reactant mixture was added dropwise to continue the reaction. Then the reaction was terminated, filtered, and distilled under reduced pressure to obtain the modified C5 petroleum resin. Modified C5 petroleum resin is blended with hydrogenated C5 petroleum resin and hydrogenated C9 petroleum resin to obtain an anti-slip resin.

[0018] By adopting the above technical solution, the grafting polymerization of p-tert-butylstyrene is achieved by cationic polymerization, and p-tert-butylstyrene is added in two stages to control the orderly grafting of p-tert-butylstyrene and obtain a modified C5 petroleum resin with an appropriate molecular weight.

[0019] Optionally, the first solvent, the second solvent, and the third solvent each independently include one or more of toluene, xylene, cyclohexane, methylcyclohexane, dioxane, and hydrogenated solvent oil.

[0020] Optionally, in the step of obtaining the reactant mixture, the amount of p-tert-butylstyrene added accounts for 80-90 wt% of the total p-tert-butylstyrene; in the step of obtaining the modified C5 petroleum resin, the amount of p-tert-butylstyrene added accounts for 10-20 wt% of the total p-tert-butylstyrene.

[0021] By adopting the above technical solution, 10-20 wt% of p-tert-butylstyrene is added a second time to promote more uniform grafting of p-tert-butylstyrene and reduce local over-polymerization.

[0022] Optionally, in the step of obtaining modified C5 petroleum resin, the temperature during the addition of the catalyst mixture is controlled at 0~10℃, and the temperature for continued reaction after the addition of the third reactant mixture is controlled at 12~20℃.

[0023] By adopting the above technical solution, the process of adding the catalyst mixture by dripping generates a large amount of heat, so it is suitable to provide a lower temperature environment.

[0024] Thirdly, this application provides the application of an anti-slip resin in rubber products.

[0025] The anti-slip resin of this application, when added to rubber products, can effectively improve the hysteresis of rubber products. In particular, when applied to tire products, it can play an anti-slip role. Furthermore, both hydrogenated C5 petroleum resin and hydrogenated C9 petroleum resin are saturated by hydrogenation, thus improving thermal stability. The addition of modified C5 petroleum resin further improves the grip of the tire and enhances its anti-slip ability on ice surfaces.

[0026] In summary, this application has the following beneficial effects: 1. This application is based on hydrogenated C5 petroleum resin and hydrogenated C9 petroleum resin, and adds C5 petroleum resin grafted with p-tert-butylstyrene. The fluidity of C5 petroleum resin promotes the dispersion of p-tert-butylstyrene in the resin structure system formed by hydrogenated C5 petroleum resin and hydrogenated C9 petroleum resin. The rigid benzene ring structure provided by p-tert-butylstyrene adjusts the rigidity and toughness of the rubber system to a moderate level. Furthermore, the grafted p-tert-butylstyrene provides tert-butyl groups embedded in petroleum resin and rubber segments, improving the low-temperature toughness of the rubber. This helps the tire embed into the tiny uneven structures on the ice surface, thereby improving the anti-slip effect and the grip on the ice surface.

[0027] 2. This application uses cationic polymerization to achieve graft polymerization of p-tert-butylstyrene, and adds p-tert-butylstyrene in two stages to control the ordered grafting of p-tert-butylstyrene, thereby obtaining a modified C5 petroleum resin with an appropriate molecular weight, so as to promote the effect of anti-skid resin on improving the anti-skid ability of tires and the grip on ice surfaces. Detailed Implementation

[0028] The following provides a further detailed description of this application.

[0029] The hydrogenated C5 petroleum resin comes from Lanzhou Petrochemical Company and has a softening point of 85~90℃.

[0030] The hydrogenated C9 petroleum resin comes from Lanzhou Petrochemical Company and has a softening point of 90~95℃.

[0031] C5 petroleum resin is sourced from Shanghai Donghu Industrial Co., Ltd.

[0032] The manufacturers and properties of the above-mentioned raw materials are used to support the scheme of this application to provide sufficient disclosure, and are not limited to the manufacturers and properties listed.

[0033] Example 1

[0034] An anti-slip resin is made from the following raw materials in parts by weight: 30 parts of hydrogenated C5 petroleum resin, 25 parts of hydrogenated C9 petroleum resin, and 6 parts of modified C5 petroleum resin. Modified C5 petroleum resin is obtained by graft polymerization of C5 petroleum resin and p-tert-butylstyrene, wherein the mass ratio of C5 petroleum resin to p-tert-butylstyrene is 1:0.14.

[0035] Specifically, the purchased C5 petroleum resin contains 25 wt% mesoprene, 10 wt% isoprene, and has a number-average molecular weight of 1800.

[0036] A method for preparing an anti-slip resin includes the following steps: C5 petroleum resin and a portion of p-tert-butylstyrene are dispersed in a first solvent to obtain a first reactant mixture; in this step, the amount of p-tert-butylstyrene added accounts for 80 wt% of the total amount of p-tert-butylstyrene; the mass of the first solvent added is 20 times the mass of C5 petroleum resin added, and the first solvent is xylene.

[0037] The catalyst is dispersed in a second solvent to obtain a catalyst mixture; the catalyst is specifically aluminum trichloride; the mass of the second solvent added is 100 times the mass of the catalyst added, and the second solvent is specifically xylene.

[0038] The remaining p-tert-butylstyrene is dispersed in a third solvent to obtain a second reactant mixture; in this step, the amount of p-tert-butylstyrene added accounts for 20 wt% of the total amount of p-tert-butylstyrene; the mass of the third solvent added is 8 times the mass of the remaining p-tert-butylstyrene added, and the third solvent is xylene.

[0039] At 0°C with continuous stirring, the catalyst mixture was added dropwise to the first reactant mixture at a mass ratio of 1:8. The addition was completed in 30 minutes. After the catalyst mixture was added, the second reactant mixture was added dropwise in 10 minutes. The temperature was adjusted to 12°C and the reaction was continued for 3 hours. Then, 2 wt% sodium hydroxide solution was added to terminate the reaction. The mixture was filtered, and the organic phase was collected and subjected to vacuum distillation to obtain the modified C5 petroleum resin.

[0040] Hydrogenated C5 petroleum resin, hydrogenated C9 petroleum resin and modified C5 petroleum resin were fed into a two-roll hot mixer in parts by weight and mixed at 100°C for 4 minutes. The mixture was then granulated to obtain an anti-slip resin.

[0041] Example 2

[0042] An anti-slip resin is made from the following raw materials in parts by weight: 50 parts of hydrogenated C5 petroleum resin, 38 parts of hydrogenated C9 petroleum resin, and 10.5 parts of modified C5 petroleum resin; The modified C5 petroleum resin is obtained by graft polymerization of C5 petroleum resin and p-tert-butylstyrene, wherein the mass ratio of C5 petroleum resin to p-tert-butylstyrene is 1:0.20.

[0043] Specifically, the purchased C5 petroleum resin contains 28 wt% mesopentadiene, 7 wt% isoprene, and has a number-average molecular weight of 2000.

[0044] A method for preparing an anti-slip resin includes the following steps: C5 petroleum resin and a portion of p-tert-butylstyrene are dispersed in a first solvent to obtain a first reactant mixture; in this step, the amount of p-tert-butylstyrene added accounts for 90 wt% of the total amount of p-tert-butylstyrene; the mass of the first solvent added is 20 times the mass of C5 petroleum resin added, and the first solvent is xylene.

[0045] The catalyst is dispersed in a second solvent to obtain a catalyst mixture; the catalyst is specifically aluminum trichloride; the mass of the second solvent added is 100 times the mass of the catalyst added, and the second solvent is specifically xylene.

[0046] The remaining p-tert-butylstyrene is dispersed in a third solvent to obtain a second reactant mixture; in this step, the amount of p-tert-butylstyrene added accounts for 10 wt% of the total amount of p-tert-butylstyrene; the mass of the third solvent added is 8 times the mass of the remaining p-tert-butylstyrene added, and the third solvent is xylene.

[0047] At 10°C with continuous stirring, the catalyst mixture was added dropwise to the first reactant mixture at a mass ratio of 1:8. The addition was completed in 30 minutes. After the catalyst mixture was added, the second reactant mixture was added dropwise over 6 minutes. The temperature was adjusted to 20°C, and the reaction was continued for 3 hours. Then, 2 wt% sodium hydroxide solution was added to terminate the reaction. The mixture was filtered, and the organic phase was collected and subjected to vacuum distillation to obtain the modified C5 petroleum resin.

[0048] Hydrogenated C5 petroleum resin, hydrogenated C9 petroleum resin and modified C5 petroleum resin were fed into a two-roll hot mixer in parts by weight and mixed at 100°C for 4 minutes. The mixture was then granulated to obtain an anti-slip resin.

[0049] Example 3

[0050] An anti-slip resin, the difference between this embodiment and Embodiment 1 is that the anti-slip resin is made from the following raw materials in parts by weight: 40 parts of hydrogenated C5 petroleum resin, 30 parts of hydrogenated C9 petroleum resin, and 9 parts of modified C5 petroleum resin. Modified C5 petroleum resin is obtained by graft polymerization of C5 petroleum resin and p-tert-butylstyrene, wherein the mass ratio of C5 petroleum resin to p-tert-butylstyrene is 1:0.14.

[0051] Specifically, the purchased C5 petroleum resin contains 25 wt% mesoprene, 10 wt% isoprene, and has a number-average molecular weight of 1800.

[0052] Example 4

[0053] An anti-slip resin, the difference between this embodiment and Embodiment 1 is that the anti-slip resin is made from the following raw materials in parts by weight: 30 parts of hydrogenated C5 petroleum resin, 25 parts of hydrogenated C9 petroleum resin, and 6 parts of modified C5 petroleum resin. Modified C5 petroleum resin is obtained by graft polymerization of C5 petroleum resin and p-tert-butylstyrene, wherein the mass ratio of C5 petroleum resin to p-tert-butylstyrene is 1:0.14.

[0054] Specifically, the purchased C5 petroleum resin contains 31 wt% mesopentadiene and 4 wt% isoprene, and has a number-average molecular weight of 2050.

[0055] Comparative Example 1 An anti-slip resin is made from the following raw materials in parts by weight: 36 parts of hydrogenated C5 petroleum resin and 25 parts of hydrogenated C9 petroleum resin.

[0056] A method for preparing an anti-slip resin includes the following steps: Hydrogenated C5 petroleum resin and hydrogenated C9 petroleum resin were fed into a two-roll hot mill and mixed at 100°C for 4 minutes, then granulated to obtain an anti-slip resin.

[0057] Comparative Example 2 An anti-slip resin is made from the following raw materials in parts by weight: 30 parts of hydrogenated C5 petroleum resin, 25 parts of hydrogenated C9 petroleum resin, and 6 parts of poly(p-tert-butylstyrene).

[0058] A method for preparing an anti-slip resin includes the following steps: p-tert-butylstyrene was dispersed in a first solvent to obtain a reaction mixture; the mass of the first solvent added was 30 times the mass of p-tert-butylstyrene added, and the first solvent was xylene.

[0059] The catalyst is dispersed in a second solvent to obtain a catalyst mixture; the catalyst is specifically aluminum trichloride; the mass of the second solvent added is 100 times the mass of the catalyst added, and the second solvent is specifically xylene.

[0060] At 0°C with continuous stirring, the catalyst mixture was added dropwise to the reactant mixture at a mass ratio of 1:8. The addition was completed in 30 minutes. The temperature was then adjusted to 12°C and the reaction was continued for 3 hours. The reaction was then terminated by adding 2 wt% sodium hydroxide solution. The mixture was filtered, and the organic phase was collected and subjected to vacuum distillation to obtain poly(p-tert-butylstyrene).

[0061] Hydrogenated C5 petroleum resin, hydrogenated C9 petroleum resin and poly(p-tert-butylstyrene) were fed into a two-roll hot mixer in parts by weight and mixed at 100°C for 4 minutes. The mixture was then granulated to obtain an anti-slip resin.

[0062] Comparative Example 3 An anti-slip resin is disclosed in this embodiment, which differs from Embodiment 1 in that the modified C5 petroleum resin is obtained by graft polymerization of C5 petroleum resin and α-methylstyrene. The mass ratio of C5 petroleum resin to α-methylstyrene is 1:0.14.

[0063] Preparation method of modified C5 petroleum resin: C5 petroleum resin and a portion of α-methylstyrene are dispersed in a first solvent to obtain a first reactant mixture; in this step, the amount of α-methylstyrene added accounts for 80 wt% of the total amount of α-methylstyrene; the mass of the first solvent added is 20 times the mass of C5 petroleum resin added, and the first solvent is xylene.

[0064] The catalyst is dispersed in a second solvent to obtain a catalyst mixture; the catalyst is specifically aluminum trichloride; the mass of the second solvent added is 100 times the mass of the catalyst added, and the second solvent is specifically xylene.

[0065] The remaining allylphenol is dispersed in a third solvent to obtain a second reactant mixture; in this step, the amount of α-methylstyrene added accounts for 20 wt% of the total amount of α-methylstyrene; the mass of the third solvent added is 8 times the mass of the remaining α-methylstyrene added, and the third solvent is xylene.

[0066] At 0°C with continuous stirring, the catalyst mixture was added dropwise to the first reactant mixture at a mass ratio of 1:8. The addition was completed in 30 minutes. After the catalyst mixture was added, the second reactant mixture was added dropwise in 10 minutes. The temperature was adjusted to 12°C and the reaction was continued for 3 hours. Then, 2 wt% sodium hydroxide solution was added to terminate the reaction. The mixture was filtered, and the organic phase was collected and subjected to vacuum distillation to obtain the modified C5 petroleum resin.

[0067] Comparative Example 4 An anti-slip resin is disclosed in this embodiment, which differs from Embodiment 1 in that the modified C5 petroleum resin is obtained by graft polymerization of C5 petroleum resin and allylphenol. The mass ratio of C5 petroleum resin to allylphenol is 1:0.14.

[0068] Preparation method of modified C5 petroleum resin: C5 petroleum resin and a portion of p-allylphenol are dispersed in a first solvent to obtain a first reactant mixture; in this step, the amount of allylphenol added accounts for 80 wt% of the total amount of allylphenol; the mass of the first solvent added is 20 times the mass of C5 petroleum resin added, and the first solvent is xylene.

[0069] The catalyst is dispersed in a second solvent to obtain a catalyst mixture; the catalyst is specifically aluminum trichloride; the mass of the second solvent added is 100 times the mass of the catalyst added, and the second solvent is specifically xylene.

[0070] The remaining allylphenol is dispersed in a third solvent to obtain a second reactant mixture; in this step, the amount of allylphenol added accounts for 20 wt% of the total amount of allylphenol; the mass of the third solvent added is 8 times the mass of the remaining allylphenol added, and the third solvent is xylene.

[0071] At 0°C with continuous stirring, the catalyst mixture was added dropwise to the first reactant mixture at a mass ratio of 1:8. The addition was completed in 30 minutes. After the catalyst mixture was added, the second reactant mixture was added dropwise in 10 minutes. The temperature was adjusted to 12°C and the reaction was continued for 3 hours. Then, 2 wt% sodium hydroxide solution was added to terminate the reaction. The mixture was filtered, and the organic phase was collected and subjected to vacuum distillation to obtain the modified C5 petroleum resin.

[0072] Application examples The application of an anti-slip resin in rubber products, including tires.

[0073] Tires are made from raw materials comprising the following parts by weight: Solution-polymerized styrene-butadiene rubber (SBR) 90 parts, butadiene rubber (BR) 30 parts, carbon black 18 parts, silica 55 parts, silane coupling agent Si69 6 parts, antioxidant 4010NA 5.5 parts, sulfur 2 parts, accelerator CZ 2.5 parts, accelerator DPG 2 parts, and anti-slip resin 12 parts.

[0074] The anti-slip resin can be prepared from Examples 1-4, thereby producing tires for Application Examples 1-4 respectively.

[0075] Tire manufacturing methods: Solution-polymerized styrene-butadiene rubber and butadiene rubber were fed into an internal mixer and mixed at a temperature of 90°C. After mixing for 1 minute, anti-slip resin was added, followed by silane coupling agent, carbon black, and silica after another minute. After another minute, the remaining raw materials were added, and the temperature was raised to 140°C and mixed for another 3 minutes. The rubber was then discharged and passed through a two-roll mill. After resting for 1 day, the rubber compound was fed into a flat vulcanizing machine for vulcanization.

[0076] Comparative application examples Tires were prepared using the raw material ratios and preparation methods described in the application examples, except that the anti-skid resins were prepared from Comparative Examples 1 to 4, thus producing Comparative Application Examples 1 to 4.

[0077] Performance testing Dynamic mechanical testing: The vulcanizates obtained from test cases 1-4, comparative application cases 1-4, and blank cases were tested using a dynamic viscoelastic spectrum analyzer. The temperature range was -60℃ to 80℃, the heating rate was 3℃ / min, and the frequency was 10Hz. The loss factor tanδ at -25℃ and the loss factor tanδ at 0℃ were obtained. The test results are shown in Table 1.

[0078] Abrasion test: The vulcanizates obtained from corresponding use cases 1-4, comparative use cases 1-4 and blank cases were tested using an Akron abrasion machine. The number of abrasion revolutions was 3000. The volume abrasion amount before and after abrasion was calculated. The test results are shown in Table 1.

[0079] Table 1

[0080] As shown in Table 1, based on the analysis of dynamic mechanical test results, the loss factor tanδ at -25℃ can reflect the tire's grip on ice. The larger the tanδ at -25℃, the stronger the grip on ice. The loss factor tanδ at 0℃ can reflect the tire's grip on wet surfaces, i.e., its ability to resist slipping. The larger the tanδ at 0℃, the stronger the ability to resist slipping.

[0081] Comparing Application Example 1 with Comparative Application Example 1, it can be seen that when modified C5 petroleum resin is added to hydrogenated C5 petroleum resin and hydrogenated C9 petroleum resin as anti-skid resins, the resulting anti-skid resin, when applied to tires, shows an increase in tanδ at -25℃ and tanδ at 0℃. This indicates that the tire's grip on ice and its anti-skid ability are both improved, while the wear is also reduced, thus balancing the wear resistance aspect.

[0082] Comparing Application Example 1 with Comparative Application Examples 2-4, it can be seen that obtaining modified C5 petroleum resin through graft polymerization of C5 petroleum resin and p-tert-butylstyrene enables the anti-slip resin to enhance ice grip and anti-slip capabilities. Without C5 petroleum resin, the lack of its fluidity characteristics may result in suboptimal ice grip and anti-slip capabilities; similarly, the lack of p-tert-butylstyrene may also negatively impact ice grip and anti-slip capabilities due to the absence of the tert-butyl intercalation into the rubber chain segments.

[0083] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this specific embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. An anti-slip resin, characterized in that: It is prepared from raw materials comprising the following parts by weight: 30-50 parts of hydrogenated C5 petroleum resin; 25-38 parts of hydrogenated C9 petroleum resin; 6-10.5 parts of modified C5 petroleum resin; The modified C5 petroleum resin is obtained by graft polymerization of C5 petroleum resin and p-tert-butylstyrene.

2. The anti-slip resin according to claim 1, characterized in that: In the raw materials for preparing the modified C5 petroleum resin, the mass ratio of C5 petroleum resin to p-tert-butylstyrene is 1:(0.14~0.20).

3. The anti-slip resin according to claim 2, characterized in that: The raw materials for preparing the modified C5 petroleum resin also include a Lewis acid catalyst.

4. The anti-slip resin according to claim 1, characterized in that: The C5 petroleum resin contains 25-28 wt% mesoprene and 7-10 wt% isoprene.

5. The anti-slip resin according to claim 1, characterized in that: The molecular weight of the C5 petroleum resin is 1800~2000.

6. A method for preparing an anti-slip resin according to any one of claims 1-5, characterized in that: Includes the following steps: C5 petroleum resin and a portion of p-tert-butylstyrene were dispersed in a first solvent to obtain a first reactant mixture. The Lewis acid catalyst is dispersed in a second solvent to obtain a catalyst mixture; The remaining p-tert-butylstyrene was dispersed in a third solvent to obtain a second reactant mixture; At 0~20℃, the catalyst mixture was added dropwise to the first reactant mixture. After the catalyst mixture was added, the second reactant mixture was added dropwise to continue the reaction. Then the reaction was terminated, filtered, and distilled under reduced pressure to obtain the modified C5 petroleum resin. Modified C5 petroleum resin is blended with hydrogenated C5 petroleum resin and hydrogenated C9 petroleum resin to obtain an anti-slip resin.

7. The method for preparing an anti-slip resin according to claim 6, characterized in that: In the step of obtaining the reactant mixture, the amount of p-tert-butylstyrene added accounts for 80-90 wt% of the total p-tert-butylstyrene; in the step of obtaining the modified C5 petroleum resin, the amount of p-tert-butylstyrene added accounts for 10-20 wt% of the total p-tert-butylstyrene.

8. The method for preparing an anti-slip resin according to claim 6, characterized in that: In the step of obtaining modified C5 petroleum resin, the temperature during the addition of the catalyst mixture is controlled at 0~10℃, and the temperature for continued reaction after the addition of the third reactant mixture is controlled at 12~20℃.

9. The application of an anti-slip resin according to any one of claims 1-5 in rubber products.

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