An uncolored polyurethane rubber roller and its preparation method

Abstract

The present invention belongs to the technical field of rubber rollers, in particular to a natural color polyurethane rubber roller and a preparation method thereof. Aiming at the problems of the existing ones, such as relatively low hardness, weak tensile strength and low tear strength, the following scheme is now proposed. The rubber roller comprises the following raw materials in parts by mass: 55 to 65 parts of polyurethane, 2 to 5 parts of curing agent, 2 to 5 parts of wear-resistant agent, 1 to 5 parts of antioxidant, 5 to 10 parts of modified epoxy soybean oil, 5 to 15 parts of modified quartz powder, 1 to 5 parts of modified fiber and 10 to 15 parts of epoxy resin. By adding modified epoxy soybean oil, modified quartz powder, modified fiber and epoxy resin into the polyurethane, the fusion degree between materials is effectively enhanced, and the hardness of the formed rubber roller is greatly improved, so that harder materials can be processed. Moreover, the tensile strength and tear strength of the rubber roller are also improved, making the rubber roller not easy to wear during use.

Description

Technical Field

[0001] The present invention relates to the technical field of rubber rollers, and particularly to a natural color polyurethane rubber roller and a preparation method thereof. Background Art

[0002] The patent with the application number 201611260955.6 discloses a low-hardness polyurethane rubber roller material and a preparation method thereof. In terms of parts by weight, the raw material composition is as follows: 77.6 - 85 parts of polyester polyol; 3 - 4.6 parts of curing agent; 0 - 1 part of filler; 11.9 - 17.8 parts of toluene diisocyanate. The operation of the present invention is convenient, the defective rate of the rubber roller is low, and it is easy for industrial production. No catalyst is used in the curing agent system, there is no catalyst residue, and the method does not adopt the way of adding plasticizer to reduce hardness, so it has good environmental protection performance and long service life. And bio-based ethylene glycol, propylene glycol, and butanediol can be selected as raw materials for preparing polyester polyol to reduce carbon residue and protect the environment. The obtained rubber roller has good abrasion resistance and long service life.

[0003] However, there are also some problems with this low-hardness polyurethane rubber roller material and its preparation method. For example, the hardness is relatively low, it can only process relatively soft materials and cannot process harder materials, and the tensile strength is weak and the tear strength is low, resulting in easy wear of the rubber roller during use. Summary of the Invention

[0004] Based on the problems of relatively low hardness, weak tensile strength, and low tear strength in the background art, the present invention provides a natural color polyurethane rubber roller and a preparation method thereof.

[0005] A natural color polyurethane rubber roller provided by the present invention comprises the following raw materials in parts by mass: 55 - 65 parts of polyurethane, 2 - 5 parts of curing agent, 2 - 5 parts of wear-resistant agent, 1 - 5 parts of antioxidant, 5 - 10 parts of modified epoxy soybean oil, 5 - 15 parts of modified quartz powder, 1 - 5 parts of modified fiber, and 10 - 15 parts of epoxy resin. The modified epoxy soybean oil includes epoxy soybean oil, ethylene glycol, and boric acid. The modified quartz powder includes quartz powder, aluminate coupling agent, and polydimethyldiallylammonium chloride. The modified fiber includes collagen fiber, barium salt, stannic chloride, and water-based resin.

[0006] Preferably, the ratio of epoxy soybean oil, ethylene glycol, and boric acid in the modified epoxy soybean oil is controlled at 6:2:2, and the epoxy value of the epoxy soybean oil is 4 - 6, which is convenient for modification.

[0007] Preferably, the preparation method of the modified epoxy soybean oil: Pour epoxy soybean oil and boric acid into a reaction kettle, stir and react at a temperature of 115°C to 145°C for 2 to 4 hours, then add ethylene glycol, and continue to react at a temperature of 120°C to 150°C for 0.5 to 1 hour. When the epoxy equivalent reaches 550 to 650, stop the reaction to obtain the modified epoxy soybean oil, which can be effectively modified.

[0008] Preferably, the ratio of quartz powder, aluminate coupling agent and polydimethyldiallylammonium chloride in the modified quartz powder is controlled at 7:1:2. The quartz powder is sieved through a 50-mesh sieve to facilitate the modification of the quartz powder.

[0009] Preferably, the preparation method of the modified quartz powder: Obtain quartz powder and aluminate coupling agent, mix them evenly and pour them into a grinding device for grinding until the mixed powder passes through a 200-mesh sieve. Then add anhydrous ethanol 3 to 10 times the amount of the mixed powder, stir evenly and pour it into an ultrasonic cleaner to accelerate the mixing and dissolution. The temperature during the ultrasonic treatment is controlled at 35°C to 45°C. After ultrasonic treatment for 6 min to 12 min, add polydimethyldiallylammonium chloride, and then continue ultrasonic treatment. After treatment for 15 min to 30 min, add it to a heating jacket for heating at a temperature of 95°C to 135°C for 5 hours. Then add the paste obtained by the reaction into the ultrasonic cleaner again for treatment. After treatment for 5 minutes, pour it into a drying oven for drying. Pour the dried product into a grinding device and grind it until it passes through a 300-mesh sieve to obtain the modified quartz powder to ensure the modification effect.

[0010] Preferably, the ratio of collagen fiber, barium salt, stannic chloride and water-based resin in the modified fiber is controlled at 14:1:1:4. The water-based resin is selected from any one of water-based polyurethane resin, water-based polyester resin, water-based epoxy resin and water-based acrylic resin to facilitate the enhancement of the strength of the rubber roller.

[0011] Preferably, the preparation method of the modified fiber: Obtain collagen fiber and barium salt, add them to the inside of a stirring device, then add deionized water, stir for 4 hours, control the stirring temperature at 45°C to 55°C, and control the stirring speed to rise to 60 r / min to 120 r / min. Then add stannic chloride and continue stirring and reacting. After stirring for half an hour, let it stand, and keep the temperature at 45°C to 55°C. Obtain the water-based resin, and the water-based resin is selected as powder or solution. Pour the water-based resin into the stirring device and continue stirring and reacting. Raise the temperature to 125°C to 135°C and raise the stirring speed to 170 r / min to 220 r / min. After stirring for 15 minutes, vacuum dry at a temperature of 55°C to 75°C to obtain the modified fiber.

[0012] Preferably, the curing agent is one or a mixture of two of 1,5-dimethylhexylamine, N,N-diethylethanolamine or triisopropanolamine, the wear-resistant agent is silica particles, and the antioxidant is one of butylated hydroxyanisole, dibutylhydroxytoluene and tert-butylhydroquinone.

[0013] A preparation method of a natural color polyurethane rubber roller includes the following steps:

[0014] S1: Obtain polyurethane, a curing agent, a wear-resistant agent and an antioxidant, heat and melt them, and stir. After stirring evenly, degas to obtain a polyurethane mixture;

[0015] S2: Dehydrate the polyurethane mixture using a vacuum dehydration device, then add epoxy resin and modified quartz powder, and stir evenly to obtain a semi-finished glue solution;

[0016] S3: Pour the modified fiber and modified epoxy soybean oil into a reaction kettle, stir and react under the temperature condition of 75°C to 95°C to obtain a reinforcing agent;

[0017] S4: Pour the reinforcing agent into the semi-finished glue solution and continue to stir and react, perform vacuum defoaming to obtain a glue solution, inject the glue solution into a rubber roller mold for extrusion molding, and demold to obtain a natural color polyurethane rubber roller.

[0018] Preferably, in S1, the heating temperature is controlled at 95°C to 115°C, and the stirring speed is controlled at 60 r / min to 120 r / min.

[0019] The beneficial effects of the present invention:

[0020] In this application, by adding modified epoxy soybean oil, modified quartz powder, modified fiber and epoxy resin to polyurethane, the fusion degree between materials is effectively enhanced, and the hardness of the formed rubber roller is greatly improved, enabling processing of harder materials. It also improves the tensile strength and tear strength of the rubber roller, making the rubber roller not easily worn during use and extending its service life. Description of the drawings

[0021] Figure 1 It is a working flow chart proposed by the present invention. Specific embodiments

[0022] The following further explains the present invention with specific embodiments.

[0023] Refer to Figure 1 , Example 1

[0024] In this embodiment, a natural polyurethane rubber roller is proposed, which comprises raw materials in the following parts by mass: 56 parts of polyurethane, 2 parts of curing agent, 2 parts of wear-resistant agent, 2 parts of antioxidant, 8 parts of modified epoxy soybean oil, 12 parts of modified quartz powder, 4 parts of modified fiber and 14 parts of epoxy resin. The modified epoxy soybean oil comprises epoxy soybean oil, ethylene glycol and boric acid. The modified quartz powder comprises quartz powder, aluminate coupling agent and poly(dimethyldiallylammonium chloride). The modified fiber comprises collagen fiber, barium salt, stannic chloride and waterborne resin. The ratio of epoxy soybean oil, ethylene glycol and boric acid in the modified epoxy soybean oil is controlled at 6:2:2, and the epoxy value of the epoxy soybean oil is 4-6. The preparation method of the modified epoxy soybean oil: Pour the epoxy soybean oil and boric acid into a reaction kettle, stir and react at a temperature of 132°C for 2-4 hours, then add ethylene glycol, and continue to react at a temperature of 140°C for 0.8 hours. When the epoxy equivalent reaches 640, stop the reaction to obtain the modified epoxy soybean oil. The ratio of quartz powder, aluminate coupling agent and poly(dimethyldiallylammonium chloride) in the modified quartz powder is controlled at 7:1:2, and the quartz powder passes through a 50-mesh sieve. The preparation method of the modified quartz powder: Obtain the quartz powder and aluminate coupling agent, mix them evenly and pour them into a grinding device for grinding until the mixed powder passes through a 200-mesh sieve, then add 3 to 10 times of anhydrous ethanol of the mixed powder, stir evenly and pour it into an ultrasonic cleaner to accelerate the mixing and dissolution. The temperature during the ultrasonic treatment is controlled at 41°C. After 0 min of ultrasonic treatment, add poly(dimethyldiallylammonium chloride), and then continue the ultrasonic treatment. After 25 min of treatment, add it to a heating jacket for heating, and heat at a temperature of 115°C for 5 hours. Then, add the paste obtained by the reaction into the ultrasonic cleaner for treatment again. After 5 min of treatment, pour it into a drying oven for drying. Pour the dried product into a grinding device and grind it until it passes through a 300-mesh sieve to obtain the modified quartz powder. The ratio of collagen fiber, barium salt, stannic chloride and waterborne resin in the modified fiber is controlled at 14:1:1:4. The waterborne resin is selected as waterborne polyurethane resin. The preparation method of the modified fiber: Obtain the collagen fiber and barium salt, add them into the interior of a stirring device, then add deionized water, stir for 4 hours, and control the stirring temperature at 51°C and the stirring speed at a rising speed to 90 r / min. Then add stannic chloride and continue to stir and react. After stirring for half an hour, let it stand, and keep the temperature at 49°C. Obtain the waterborne resin, and the waterborne resin is selected as powder or solution. Pour the waterborne resin into the stirring device and continue to stir and react. Raise the temperature to 128°C and raise the stirring speed to 210 r / min. After stirring for 15 minutes, carry out vacuum drying at a temperature of 65°C to obtain the modified fiber. The curing agent is 1,5-dimethylhexylamine, the wear-resistant agent is silica particles, and the antioxidant is butylated hydroxyanisole.

[0025] A preparation method of a natural polyurethane rubber roller comprises the following steps:

[0026] S1: Obtain polyurethane, curing agent, wear-resistant agent and antioxidant, heat and melt them, and stir. After stirring evenly, degas to obtain a polyurethane mixture;

[0027] S2: Dehydrate the polyurethane mixture using vacuum dehydration equipment, then add epoxy resin and modified quartz powder, stir evenly to obtain a semi-finished glue solution, control the heating temperature at 105 °C, and control the stirring speed at 70 r / min;

[0028] S3: Pour the modified fiber and modified epoxy soybean oil into a reaction kettle, stir and react under the temperature condition of 83 °C to obtain a reinforcing agent;

[0029] S4: Pour the reinforcing agent into the semi-finished glue solution and continue to stir and react, perform vacuum defoaming to obtain a glue solution, inject the glue solution into a rubber roller mold for extrusion molding, and demold to obtain a natural color polyurethane rubber roller.

[0030] Refer to Figure 1 , Example 2

[0031] In this embodiment, a natural polyurethane rubber roller is proposed, which comprises raw materials in the following parts by mass: 55 parts of polyurethane, 2 parts of curing agent, 4 parts of wear-resistant agent, 3 parts of antioxidant, 8 parts of modified epoxy soybean oil, 12 parts of modified quartz powder, 3 parts of modified fiber and 13 parts of epoxy resin. The modified epoxy soybean oil comprises epoxy soybean oil, ethylene glycol and boric acid. The modified quartz powder comprises quartz powder, aluminate coupling agent and polydimethyldiallylammonium chloride. The modified fiber comprises collagen fiber, barium salt, stannic chloride and waterborne resin. The ratio of epoxy soybean oil, ethylene glycol and boric acid in the modified epoxy soybean oil is controlled at 6:2:2, and the epoxy value of the epoxy soybean oil is 4-6. The preparation method of the modified epoxy soybean oil: Pour epoxy soybean oil and boric acid into a reaction kettle, stir and react at a temperature of 132 °C for 2-4 hours, then add ethylene glycol, and continue to react at a temperature of 140 °C for 0.8 hours. When the epoxy equivalent reaches 640, stop the reaction to obtain the modified epoxy soybean oil. The ratio of quartz powder, aluminate coupling agent and polydimethyldiallylammonium chloride in the modified quartz powder is controlled at 7:1:2, and the quartz powder passes through a 50-mesh sieve. The preparation method of the modified quartz powder: Obtain quartz powder and aluminate coupling agent, mix them evenly and pour them into a grinding device for grinding until the mixed powder passes through a 200-mesh sieve, then add anhydrous ethanol 3 to 10 times the amount of the mixed powder, stir evenly and pour it into an ultrasonic cleaner to accelerate mixing and dissolution. The temperature during the ultrasonic treatment is controlled at 41 °C. After 0 min of ultrasonic treatment, add polydimethyldiallylammonium chloride, and then continue ultrasonic treatment. After 25 min of treatment, add it to a heating jacket for heating, and heat at a temperature of 115 °C for 5 hours. Then, add the paste obtained by the reaction into the ultrasonic cleaner for treatment again. After 5 min of treatment, pour it into a drying oven for drying. Pour the dried product into a grinding device and grind it until it passes through a 300-mesh sieve to obtain the modified quartz powder. The ratio of collagen fiber, barium salt, stannic chloride and waterborne resin in the modified fiber is controlled at 14:1:1:4. The waterborne resin is selected as waterborne polyurethane resin. The preparation method of the modified fiber: Obtain collagen fiber and barium salt, add them into the interior of a stirring device, then add deionized water, stir for 4 hours, control the stirring temperature at 51 °C, and control the stirring speed to rise to 90 r / min. Then add stannic chloride and continue stirring and reacting. After stirring for half an hour, let it stand, and keep the temperature at 49 °C. Obtain the waterborne resin, and the waterborne resin is selected as powder or solution. Pour the waterborne resin into the stirring device and continue stirring and reacting. Raise the temperature to 128 °C and raise the stirring speed to 210 r / min. After stirring for 15 minutes, carry out vacuum drying at a temperature of 65 °C to obtain the modified fiber. The curing agent is 1,5-dimethylhexylamine, the wear-resistant agent is silica particles, and the antioxidant is butylated hydroxyanisole.

[0032] A preparation method of a natural polyurethane rubber roller comprises the following steps:

[0033] S1: Obtain polyurethane, curing agent, wear-resistant agent and antioxidant, heat and melt them, and stir. After stirring evenly, degas to obtain a polyurethane mixture;

[0034] S2: Dehydrate the polyurethane mixture using a vacuum dehydration device, then add epoxy resin and modified quartz powder, stir evenly to obtain a semi-finished glue solution, control the heating temperature at 105°C, and control the stirring speed at 70 r / min;

[0035] S3: Pour the modified fiber and modified epoxy soybean oil into a reaction kettle, stir and react under the temperature condition of 83°C to obtain a reinforcing agent;

[0036] S4: Pour the reinforcing agent into the semi-finished glue solution and continue to stir and react, perform vacuum defoaming to obtain a glue solution, inject the glue solution into a rubber roller mold for extrusion molding, and demold to obtain a natural color polyurethane rubber roller.

[0037] Refer to Figure 1 , Example Three

[0038] In this embodiment, a natural-color polyurethane rubber roller is proposed, which comprises raw materials in the following parts by mass: 58 parts of polyurethane, 3 parts of curing agent, 3 parts of wear-resistant agent, 4 parts of antioxidant, 7 parts of modified epoxy soybean oil, 10 parts of modified quartz powder, 2 parts of modified fiber and 13 parts of epoxy resin. The modified epoxy soybean oil comprises epoxy soybean oil, ethylene glycol and boric acid. The modified quartz powder comprises quartz powder, aluminate coupling agent and polydimethyldiallylammonium chloride. The modified fiber comprises collagen fiber, barium salt, stannic chloride and water-based resin. The ratio of epoxy soybean oil, ethylene glycol and boric acid in the modified epoxy soybean oil is controlled at 6:2:2, and the epoxy value of the epoxy soybean oil is 4-6. The preparation method of the modified epoxy soybean oil: Pour epoxy soybean oil and boric acid into a reaction kettle, stir and react at a temperature of 132 °C for 2-4 hours, then add ethylene glycol, and continue to react at a temperature of 140 °C for 0.8 hours. When the epoxy equivalent reaches 640, stop the reaction to obtain the modified epoxy soybean oil. The ratio of quartz powder, aluminate coupling agent and polydimethyldiallylammonium chloride in the modified quartz powder is controlled at 7:1:2, and the quartz powder passes through a 50-mesh sieve. The preparation method of the modified quartz powder: Obtain quartz powder and aluminate coupling agent, mix them evenly and pour them into a grinding device for grinding until the mixed powder passes through a 200-mesh sieve, then add anhydrous ethanol 3 to 10 times the amount of the mixed powder, stir evenly and pour it into an ultrasonic cleaner to accelerate mixing and dissolution. The temperature during the ultrasonic treatment is controlled at 41 °C. After ultrasonic treatment for 0 min, add polydimethyldiallylammonium chloride, and then continue ultrasonic treatment. After treatment for 25 min, add it to a heating jacket for heating, and heat at a temperature of 115 °C for 5 hours. Then add the paste obtained by the reaction to the ultrasonic cleaner for treatment again. After treatment for 5 minutes, pour it into a drying oven for drying. Pour the dried product into a grinding device and grind it until it passes through a 300-mesh sieve to obtain the modified quartz powder. The ratio of collagen fiber, barium salt, stannic chloride and water-based resin in the modified fiber is controlled at 14:1:1:4. The water-based resin is selected as water-based polyurethane resin. The preparation method of the modified fiber: Obtain collagen fiber and barium salt, add them to the inside of a stirring device, then add deionized water, stir for 4 hours, control the stirring temperature at 51 °C, and control the stirring speed to rise to 90 r / min. Then add stannic chloride and continue stirring and reacting. After stirring for half an hour, let it stand, and keep the temperature at 49 °C. Obtain the water-based resin, and the water-based resin is selected as powder or solution. Pour the water-based resin into the stirring device and continue stirring and reacting. Raise the temperature to 128 °C and raise the stirring speed to 210 r / min. After stirring for 15 minutes, carry out vacuum drying at a temperature of 65 °C to obtain the modified fiber. The curing agent is 1,5-dimethylhexylamine, the wear-resistant agent is silica particles, and the antioxidant is butylated hydroxyanisole.

[0039] A preparation method of a natural-color polyurethane rubber roller comprises the following steps:

[0040] S1: Obtain polyurethane, curing agent, wear-resistant agent and antioxidant, heat and melt them, and stir. After stirring evenly, degas to obtain a polyurethane mixture;

[0041] S2: Dehydrate the polyurethane mixture using a vacuum dehydration device, then add epoxy resin and modified quartz powder, stir evenly to obtain a semi-finished glue solution, control the heating temperature at 105 °C, and control the stirring speed at 70 r / min;

[0042] S3: Pour the modified fiber and modified epoxy soybean oil into a reaction kettle, stir and react under the temperature condition of 83 °C to obtain a reinforcing agent;

[0043] S4: Pour the reinforcing agent into the semi-finished glue solution and continue to stir and react, perform vacuum defoaming to obtain a glue solution, inject the glue solution into a rubber roller mold for extrusion molding, and demold to obtain a natural color polyurethane rubber roller.

[0044] Refer to Figure 1 , Example 4

[0045] In this embodiment, a natural color polyurethane rubber roller is provided, which comprises raw materials in the following parts by mass: 60 parts of polyurethane, 5 parts of curing agent, 5 parts of wear-resistant agent, 2 parts of antioxidant, 6 parts of modified epoxy soybean oil, 7 parts of modified quartz powder, 3 parts of modified fiber and 12 parts of epoxy resin. The modified epoxy soybean oil comprises epoxy soybean oil, ethylene glycol and boric acid. The modified quartz powder comprises quartz powder, aluminate coupling agent and poly(dimethyldiallylammonium chloride). The modified fiber comprises collagen fiber, barium salt, stannic chloride and waterborne resin. The ratio of epoxy soybean oil, ethylene glycol and boric acid in the modified epoxy soybean oil is controlled at 6:2:2, and the epoxy value of the epoxy soybean oil is 4-6. The preparation method of the modified epoxy soybean oil: Pour the epoxy soybean oil and boric acid into a reaction kettle, stir and react at a temperature of 132 °C for 2-4 hours, then add ethylene glycol, and continue to react at a temperature of 140 °C for 0.8 hours. When the epoxy equivalent reaches 640, stop the reaction to obtain the modified epoxy soybean oil. The ratio of quartz powder, aluminate coupling agent and poly(dimethyldiallylammonium chloride) in the modified quartz powder is controlled at 7:1:2, and the quartz powder is sieved through a 50-mesh sieve. The preparation method of the modified quartz powder: Obtain the quartz powder and aluminate coupling agent, mix them evenly and pour them into a grinding device for grinding until the mixed powder passes through a 200-mesh sieve. Then add 3 to 10 times the amount of anhydrous ethanol of the mixed powder, stir evenly and pour it into an ultrasonic cleaner to accelerate mixing and dissolution. The temperature during the ultrasonic treatment is controlled at 41 °C. After 0 min of ultrasonic treatment, add poly(dimethyldiallylammonium chloride), and then continue ultrasonic treatment. After 25 min of treatment, add it to a heating jacket for heating, and heat at a temperature of 115 °C for 5 hours. Then add the paste obtained by the reaction into the ultrasonic cleaner for treatment again. After 5 min of treatment, pour it into a drying oven for drying. Pour the dried product into a grinding device and grind it until it passes through a 300-mesh sieve to obtain the modified quartz powder. The ratio of collagen fiber, barium salt, stannic chloride and waterborne resin in the modified fiber is controlled at 14:1:1:4. The waterborne resin is selected as waterborne polyurethane resin. The preparation method of the modified fiber: Obtain the collagen fiber and barium salt, add them into the interior of a stirring device, then add deionized water, stir for 4 hours, and control the stirring temperature at 51 °C and the stirring speed at a rising speed to 90 r / min. Then add stannic chloride and continue stirring and reacting. After stirring for half an hour, let it stand, and keep the temperature at 49 °C. Obtain the waterborne resin, and the waterborne resin is selected as powder or solution. Pour the waterborne resin into the stirring device and continue stirring and reacting. Raise the temperature to 128 °C and raise the stirring speed to 210 r / min. After stirring for 15 minutes, vacuum dry at a temperature of 65 °C to obtain the modified fiber. The curing agent is 1,5-dimethylhexylamine, the wear-resistant agent is silica particles, and the antioxidant is butylated hydroxyanisole.

[0046] A preparation method of a natural color polyurethane rubber roller comprises the following steps:

[0047] S1: Obtain polyurethane, curing agent, wear-resistant agent and antioxidant, heat and melt them, and stir. After stirring evenly, degas to obtain a polyurethane mixture;

[0048] S2: Dehydrate the polyurethane mixture using vacuum dehydration equipment, then add epoxy resin and modified quartz powder, stir evenly to obtain a semi-finished glue solution, control the heating temperature at 105 °C, and control the stirring speed at 70 r / min;

[0049] S3: Pour the modified fiber and modified epoxy soybean oil into a reaction kettle, stir and react under the temperature condition of 83 °C to obtain a reinforcing agent;

[0050] S4: Pour the reinforcing agent into the semi-finished glue solution and continue to stir and react, perform vacuum defoaming to obtain a glue solution, inject the glue solution into a rubber roller mold for extrusion molding, and demold to obtain a natural color polyurethane rubber roller.

[0051] Refer to Figure 1 , Example Five

[0052] In this embodiment, a natural color polyurethane rubber roller is proposed, which comprises raw materials in the following parts by mass: 60 parts of polyurethane, 5 parts of curing agent, 5 parts of wear-resistant agent, 5 parts of antioxidant, 5 parts of modified epoxy soybean oil, 8 parts of modified quartz powder, 2 parts of modified fiber and 10 parts of epoxy resin. The modified epoxy soybean oil comprises epoxy soybean oil, ethylene glycol and boric acid. The modified quartz powder comprises quartz powder, aluminate coupling agent and polydimethyldiallylammonium chloride. The modified fiber comprises collagen fiber, barium salt, stannic chloride and waterborne resin. The ratio of epoxy soybean oil, ethylene glycol and boric acid in the modified epoxy soybean oil is controlled at 6:2:2, and the epoxy value of the epoxy soybean oil is 4-6. The preparation method of the modified epoxy soybean oil: pour the epoxy soybean oil and boric acid into a reaction kettle, stir and react at a temperature of 132 °C for 2-4 hours, then add ethylene glycol, and continue to react at a temperature of 140 °C for 0.8 hours. When the epoxy equivalent reaches 640, stop the reaction to obtain the modified epoxy soybean oil. The ratio of quartz powder, aluminate coupling agent and polydimethyldiallylammonium chloride in the modified quartz powder is controlled at 7:1:2, and the quartz powder passes through a 50-mesh sieve. The preparation method of the modified quartz powder: obtain the quartz powder and aluminate coupling agent, mix them evenly and pour them into a grinding device for grinding until the mixed powder passes through a 200-mesh sieve, then add 3 to 10 times of anhydrous ethanol of the mixed powder, stir evenly and pour it into an ultrasonic cleaner to accelerate the mixing and dissolution. The temperature during the ultrasonic treatment is controlled at 41 °C. After ultrasonic treatment for 0 min, add polydimethyldiallylammonium chloride, and then continue ultrasonic treatment. After treatment for 25 min, add it to a heating jacket for heating, and heat at a temperature of 115 °C for 5 hours. Then, add the paste obtained by the reaction into the ultrasonic cleaner again for treatment. After treatment for 5 minutes, pour it into a drying oven for drying. Pour the dried product into a grinding device and grind it until it passes through a 300-mesh sieve to obtain the modified quartz powder. The ratio of collagen fiber, barium salt, stannic chloride and waterborne resin in the modified fiber is controlled at 14:1:1:4. The waterborne resin is selected as waterborne polyurethane resin. The preparation method of the modified fiber: obtain the collagen fiber and barium salt, add them into the interior of a stirring device, then add deionized water, stir for 4 hours, control the stirring temperature at 51 °C, and control the stirring speed to rise to 90 r / min. Then add stannic chloride and continue stirring and reacting. After stirring for half an hour, let it stand, and keep the temperature at 49 °C. Obtain the waterborne resin, and the waterborne resin is selected as powder or solution. Pour the waterborne resin into the stirring device and continue stirring and reacting. Raise the temperature to 128 °C and raise the stirring speed to 210 r / min. After stirring for 15 minutes, carry out vacuum drying at a temperature of 65 °C to obtain the modified fiber. The curing agent is 1,5-dimethylhexylamine, the wear-resistant agent is silica particles, and the antioxidant is butylated hydroxyanisole.

[0053] A preparation method of a natural color polyurethane rubber roller comprises the following steps:

[0054] S1: Obtain polyurethane, curing agent, wear-resistant agent and antioxidant, heat and melt them, and stir. After stirring evenly, degas to obtain a polyurethane mixture;

[0055] S2: Dehydrate the polyurethane mixture using a vacuum dehydration device, then add epoxy resin and modified quartz powder, and stir evenly to obtain a semi-finished glue solution. Control the heating temperature at 105 °C and the stirring speed at 70 r / min;

[0056] S3: Pour the modified fiber and modified epoxy soybean oil into a reaction kettle, stir and react under the temperature condition of 83 °C to obtain a reinforcing agent;

[0057] S4: Pour the reinforcing agent into the semi-finished glue solution and continue to stir and react, then perform vacuum defoaming to obtain a glue solution. Inject the glue solution into a rubber roller mold for extrusion molding, and demold to obtain a natural-color polyurethane rubber roller.

[0058] Compare the conventional rubber rollers with the rubber rollers prepared in Examples 1 to 5. The rubber rollers prepared in Examples 1 to 5 are as follows in the table:

[0059]

[0060] For hardness testing, GB / T531 is adopted; for tensile strength, GB / T10654 is adopted; for tear strength, GB / T530 is adopted.

[0061] As can be seen from the above table, the hardness, tensile strength and tear strength of the rubber rollers prepared by the present invention have been significantly improved, and Example 2 is the best example.

[0062] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. An uncolored polyurethane rubber roller, characterized in that, it comprises the following raw materials in parts by mass: 55 to 65 parts of polyurethane, 2 to 5 parts of curing agent, 2 to 5 parts of wear-resistant agent, 1 to 5 parts of antioxidant, 5 to 10 parts of modified epoxy soybean oil, 5 to 15 parts of modified quartz powder, 1 to 5 parts of modified fiber, and 10 to 15 parts of epoxy resin. The modified epoxy soybean oil includes epoxy soybean oil, ethylene glycol, and boric acid. The modified quartz powder includes quartz powder, aluminate coupling agent, and polydimethyldiallylammonium chloride. The modified fiber includes collagen fiber, barium salt, stannic chloride, and water-based resin: In the modified epoxy soybean oil, the ratio of epoxy soybean oil, ethylene glycol, and boric acid is controlled at 6:2:2, and the epoxy value of the epoxy soybean oil is 4 to 6: The preparation method of the modified epoxy soybean oil: Pour epoxy soybean oil and boric acid into a reaction kettle, stir and react at a temperature of 115°C to 145°C for 2 to 4 hours, then add ethylene glycol, and continue to react at a temperature of 120°C to 150°C for 0.5 to 1 hour. When the epoxy equivalent reaches 550 to 650, stop the reaction to obtain the modified epoxy soybean oil: In the modified quartz powder, the ratio of quartz powder, aluminate coupling agent, and polydimethyldiallylammonium chloride is controlled at 7:1:2, and the quartz powder passes through a 50-mesh sieve: The preparation method of the modified quartz powder: Obtain quartz powder and aluminate coupling agent, mix them evenly and pour them into a grinding device for grinding until the mixed powder passes through a 200-mesh sieve. Then add 3 to 10 times the amount of anhydrous ethanol of the mixed powder, stir evenly and pour it into an ultrasonic cleaner to accelerate mixing and dissolution. The temperature during the ultrasonic treatment is controlled at 35°C to 45°C. After ultrasonic treatment for 6 to 12 minutes, add polydimethyldiallylammonium chloride, and then continue ultrasonic treatment. After treatment for 15 to 30 minutes, add it to a heating jacket for heating, and heat at a temperature of 95°C to 135°C for 5 hours. Then add the paste obtained by the reaction to the ultrasonic cleaner for treatment again. After treatment for 5 minutes, pour it into a drying oven for drying. Pour the dried product into a grinding device and grind it until it passes through a 300-mesh sieve to obtain the modified quartz powder: In the modified fiber, the ratio of collagen fiber, barium salt, stannic chloride, and water-based resin is controlled at 14:1:1:4, and the water-based resin is selected from any one of water-based polyurethane resin, water-based polyester resin, water-based epoxy resin, and water-based acrylic resin: The preparation method of the modified fiber: Obtain collagen fiber and barium salt, add them into the interior of a stirring device, then add deionized water, stir for 4 hours, control the stirring temperature at 45°C to 55°C, control the stirring speed to rise to 60 r / min to 120 r / min, then add stannic chloride and continue stirring and reacting. After stirring for half an hour, let it stand, keep the temperature at 45°C to 55°C to obtain an aqueous resin. The aqueous resin is selected as a powder material or a solution. Pour the aqueous resin into the stirring device and continue stirring and reacting. Raise the temperature to 125°C to 135°C, raise the stirring speed to 170 r / min to 220 r / min. After stirring for 15 minutes, conduct vacuum drying under the condition that the temperature is 55°C to 75°C to obtain the modified fiber.

2. A natural color polyurethane rubber roller according to claim 1, characterized in that, the curing agent is 1,5-dimethylhexylamine, the wear-resistant agent is silica particles, and the antioxidant is butylated hydroxyanisole.

3. A preparation method of a natural color polyurethane rubber roller according to claim 1, characterized in that, it includes the following steps: S1: Obtain polyurethane, a curing agent, a wear-resistant agent and an antioxidant, heat and melt them, and conduct stirring. After stirring evenly, degas to obtain a polyurethane mixture; S2: Dehydrate the polyurethane mixture using a vacuum dehydration device, then add epoxy resin and modified quartz powder, and stir evenly to obtain a semi-finished glue solution; S3: Pour the modified fiber and modified epoxy soybean oil into a reaction kettle, stir and react under the temperature condition of 75°C to 95°C to obtain a reinforcing agent; S4: Pour the reinforcing agent into the semi-finished glue solution and continue stirring and reacting, conduct vacuum degassing to obtain a glue solution, inject the glue solution into a rubber roller mold for extrusion molding, and demold to obtain a natural color polyurethane rubber roller.

4. A preparation method of a natural color polyurethane rubber roller according to claim 3, characterized in that, in S1, the heating temperature is controlled at 95°C to 115°C, and the stirring speed is controlled at 60 r / min to 120 r / min.

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