Preparation method of high and low temperature resistant chloroprene rubber sponge rubber plate adapter compensation material

Abstract

The invention discloses a preparation method of a high and low temperature resistant chloroprene rubber sponge rubber plate adapter compensation material, and relates to a preparation method of an adapter compensation material, the method adopts a press vulcanizer mold pressing and mold filling method one-stage vulcanization process, and the prepared chloroprene rubber sponge rubber plate has excellent low compression permanent deformation resistance and creep resistance in high and low temperature environments. The foam structure of the sponge is an open pore structure, has excellent shock absorption and energy absorption functions, and has the characteristics of excellent weather resistance, aging resistance and higher compression modulus performance. The chloroprene rubber sponge rubber plate comprises the following raw materials in parts by weight: 100 parts of chloroprene rubber, 4 parts of high-activity magnesium oxide, 8-10 parts of zinc oxide, 0.5 part of stearic acid, 0.5-1.5 parts of an accelerant MTT, 3-5 parts of a vulcanizing agent, 2-3 parts of an anti-aging agent 445, 3-5 parts of a foaming agent, 2-4 parts of a foaming promoter, 25-28 parts of a plasticizer and 40-50 parts of spray carbon black. The chloroprene rubber sponge rubber plate adapter compensation material prepared by the method is high in compression rigidity, good in low-temperature rebound resilience, good in high-temperature creep resistance and good in shock absorption and energy absorption.

Description

Technical Field

[0001] The invention relates to a method for preparing an adapter compensation material, in particular to a method for preparing a high and low temperature resistant chloroprene rubber sponge plate adapter compensation material. Background Art

[0002] Neoprene sponge sheets are used in adapter compensation materials. These materials serve as an elastic support system connecting the housing and the object. They also provide cushioning and shock absorption during the compressed storage and transportation stages, preventing damage to electrical components and extending the life of the device. These adapter compensation materials must possess high compressive strength, dynamic and static compression-deformation characteristics, and low creep resistance at high and low temperatures. Therefore, they must exhibit rapid rebound (recovery) when the object is horizontally compressed, even under temperatures between 60°C and -45°C, during storage, transportation, and loading and unloading. This ensures that the material can withstand long-term use in harsh environments, minimizing sinking caused by uneven mass distribution and the resulting "eccentricity" caused by asymmetry. Testing has shown that these materials can withstand long-term use in harsh environments, with a service life exceeding 15 years in the compressed state.

[0003] Based on the existing adapter compensation material, after high-temperature accelerated aging verification and verification under normal temperature and pressure conditions, the maximum service life is about seven years. In addition, the current adapter compensation material does not have the properties of rapid rebound in low-temperature environments and high-temperature creep resistance. Summary of the Invention

[0004] The present invention aims to provide a method for preparing a high and low temperature resistant chloroprene rubber sponge rubber plate adapter compensation material. The chloroprene rubber sponge rubber plate adapter compensation material prepared by the method has high compression stiffness, good low-temperature rebound performance, good high-temperature creep resistance, and good shock absorption and energy absorption effect. The chloroprene rubber sponge rubber plate has an open-pore structure and can be used for long-term compression under temperature conditions of 60°C to -45°C.

[0005] The technical solution adopted in the present invention is: A method for preparing a high and low temperature resistant chloroprene rubber sponge plate adapter compensation material, the method comprising the following preparation steps: Step 1: Pre-mill the chloroprene rubber in an open mill for 3-5 minutes. The roller temperature of the open mill is 35-45°C, the roller speed is 21 rpm, and the roller speed ratio is 1:1.2. Step 2: Add high-activity magnesium oxide, stearic acid, accelerator MTT, antioxidant 445, foaming agent, foaming aid, plasticizer, spray carbon black, vulcanizing agent, and zinc oxide compounding agent to step 1 and mix for 30-38 minutes. The roller temperature of the open mill is 35-45°C, the roller speed is 21 rpm, and the roller speed ratio is 1:1.2. Step three: the glue in step two is opened on the roll mill and is beaten 5-6 times, and is beaten 5-6 times in a triangle bag thin pass, and is pressed into a sheet, and is parked for 12-24 (h); Step four: the glue in step three is pressed to a thickness of 3-4 (mm) or 5-6 (mm) by using a sheet press, and is cut into a frame size width and length, and the semi-finished product rubber blank is placed in the frame, is padded with an exhaust cloth and is covered with a cover plate, and is sent into a flat plate curing agent, and the curing conditions are that the temperature is 160-170 (℃), the time is 30-40 (min), and the pressure is 1-3 (MPa); Step five: the sponge in step four is placed in an air exchange type aging box for heat treatment, and the heat treatment conditions are that the temperature is raised to 60-70 (℃), is kept for 20-30 (min), is then raised to 100-120 (℃), is kept for 2-3 (h), and is naturally cooled to room temperature.

[0006] The weight parts of the raw material components of the chlorobutyl rubber sponge rubber plate adapter compensation material preparation method are: chlorobutyl rubber 100 parts, high-activity magnesium oxide 4 parts, zinc oxide 8-10 parts, stearic acid 0.5 parts, accelerator MTT 0.5-1.5 parts, vulcanizing agent 3-5 parts, antioxidant 445 2-3 parts, foaming agent 3-5 parts, foaming aid 2-4 parts, plasticizer 25-28 parts, and spray carbon black 40-50 parts.

[0007] The vulcanizing agent of the chlorobutyl rubber sponge rubber plate adapter compensation material preparation method is 2,5-dimethyl-2,5-bis-hexane, trimethylolpropane trimethyl acrylate, polybutadiene, and a composition thereof.

[0008] The foaming agent and the foaming aid of the chlorobutyl rubber sponge rubber plate adapter compensation material preparation method are foaming agent H, foaming agent OBSH, and diethylene glycol.

[0009] The plasticizer of the chlorobutyl rubber sponge rubber plate adapter compensation material preparation method is the environmentally friendly polyol plasticizer dibutyl sebacate.

[0010] The chlorobutyl rubber brand of the chlorobutyl rubber sponge rubber plate adapter compensation material preparation method is DCR2131.

[0011] The beneficial effects of the present application are: The present invention utilizes the structural properties of chloroprene rubber DCR2131 (a copolymer of chloroprene and 2,3-dichloro-1,3-butadiene) to disrupt the regularity of the chloroprene molecular chain, resulting in excellent crystallization resistance, good low-temperature performance, and optimal heat aging resistance. By leveraging the advantages of this brand of chloroprene rubber and adding 2,5-dimethyl-2,5-bishexane, trimethylolpropane trimethacrylate, and polybutadiene, the sponge product's heat resistance, cold resistance, and compression set performance are enhanced. Furthermore, using blowing agent H, blowing agent OBSH, and diethylene glycol as the foaming system, an open-cell chloroprene rubber sponge product is produced, demonstrating outstanding compressive strength and high- and low-temperature deformation resistance, while also being easy to process. The method is simple and easy to implement, employs readily available raw materials, and requires minimal equipment and process conditions. It also boasts high production efficiency, low energy consumption, and is suitable for large-scale production. DETAILED DESCRIPTION

[0012] The present invention is further described below by specific examples, but the present invention is not limited to the following examples. Within the scope of the present invention or without departing from the content, spirit and scope of the present invention, changes, combinations or substitutions of the present invention will be obvious to those skilled in the art and are included in the scope of the present invention. Example 1

[0013] A high and low temperature resistant low compression permanent deformation chloroprene rubber sponge sheet comprises the following raw materials in parts by weight: 100 parts of butyl rubber, 4 parts of highly active magnesium oxide, 8 parts of zinc oxide, 0.5 parts of stearic acid, 0.5 parts of accelerator MTT, 3 parts of vulcanizing agent, 2 parts of antioxidant 445, 3 parts of foaming agent, 2 parts of foaming aid, 25 parts of plasticizer, and 40 parts of spray carbon black.

[0014] The chloroprene rubber brand is DCR2131.

[0015] The vulcanizing agent consists of 2,5-dimethyl-2,5-bishexane, trimethylolpropane trimethacrylate and polybutadiene.

[0016] The foaming agent and the foaming auxiliary agent are composed of foaming agent H, foaming agent OBSH and diethylene glycol.

[0017] The plasticizer consists of environmentally friendly polyol plasticizer and dibutyl sebacate.

[0018] Preparation method of high and low temperature resistant low compression permanent deformation chloroprene rubber sponge sheet Step 1: Pre-mill the chloroprene rubber in an open mill for 3-5 minutes. The roller temperature of the open mill is 35-45°C, the roller speed is 21 rpm, and the roller speed ratio is 1:1.2. Step 2: Add high-activity magnesium oxide, stearic acid, accelerator MTT, antioxidant, foaming agent, foaming aid, plasticizer, spray carbon black, vulcanizing agent, and zinc oxide compounding agent to step 1 and mix for 30-38 minutes. The roller temperature of the open mill is 35-45°C, the roller speed is 21 rpm, and the roller speed ratio is 1:1.2. Step 3: Put the rubber compound in step 2 on the mixing mill, hit eight knives 5-6 times, hit the triangle wrap 5-6 times, press the sheet, and stop for 12-24 hours; Step 4: Use a sheet press to press the rubber material from step 3 into a sheet with a thickness of 3-4 (mm) or 5-6 (mm), cut it into the width and length of the mold frame, place the semi-finished rubber blank into the mold frame, pad it with a degassing pad and cover it with a cover plate, and send it into the flat vulcanizer. The vulcanization conditions are temperature 160℃, time 40min, and pressure 2MPa. Step 5: Place the sponge in step 4 in a ventilation aging box for heat treatment. The heat treatment conditions are: raise the room temperature to 60°C, maintain for 20 minutes, then raise to 120°C, maintain for 2 hours, and naturally cool to room temperature. Example 2

[0019] A high and low temperature resistant low compression permanent deformation chloroprene rubber sponge sheet comprises the following raw materials in parts by weight: 100 parts of butyl rubber, 4 parts of highly active magnesium oxide, 8 parts of zinc oxide, 0.5 parts of stearic acid, 1 part of accelerator MTT, 3 parts of vulcanizing agent, 4452 parts of antioxidant, 5 parts of foaming agent, 2 parts of foaming aid, 25 parts of plasticizer, and 40 parts of spray carbon black.

[0020] The chloroprene rubber brand is DCR2131.

[0021] The vulcanizing agent consists of 2,5-dimethyl-2,5-bishexane, trimethylolpropane trimethacrylate and polybutadiene.

[0022] The foaming agent and the foaming auxiliary agent are composed of foaming agent H, foaming agent OBSH and diethylene glycol.

[0023] The plasticizer consists of environmentally friendly polyol plasticizer and dibutyl sebacate.

[0024] Preparation method of high and low temperature resistant low compression permanent deformation chloroprene rubber sponge sheet Step 1: Pre-mill the chloroprene rubber in an open mill for 3-5 minutes. The roller temperature of the open mill is 35-45°C, the roller speed is 21 rpm, and the roller speed ratio is 1:1.2. Step 2: Add high-activity magnesium oxide, stearic acid, accelerator MTT, antioxidant, foaming agent, foaming aid, plasticizer, spray carbon black, vulcanizing agent, and zinc oxide compounding agent to step 1 and mix for 30-38 minutes. The roller temperature of the open mill is 35-45°C, the roller speed is 21 rpm, and the roller speed ratio is 1:1.2. Step 3: Put the rubber compound in step 2 on the mixing mill, hit eight knives 5-6 times, hit the triangle wrap 5-6 times, press the sheet, and stop for 12-24 hours; Step 4: Use a sheet press to press the rubber material from step 3 into a sheet with a thickness of 3-4 (mm) or 5-6 (mm), cut it into the width and length of the mold frame, place the semi-finished rubber blank into the mold frame, pad it with a degassing pad and cover it with a cover plate, and send it into the flat vulcanizer. The vulcanization conditions are temperature 170℃, time 30min, and pressure 2MPa. Step 5: Place the sponge in step 4 in a ventilation aging box for heat treatment. The heat treatment conditions are: raise the room temperature to 60°C, maintain for 30 minutes, then raise to 120°C, maintain for 2 hours, and naturally cool to room temperature. Example 3

[0025] A high and low temperature resistant low compression permanent deformation chloroprene rubber sponge sheet comprises the following raw materials in parts by weight: 100 parts of butyl rubber, 4 parts of highly active magnesium oxide, 10 parts of zinc oxide, 0.5 parts of stearic acid, 1.5 parts of accelerator MTT, 5 parts of vulcanizing agent, 3 parts of antioxidant 445, 5 parts of foaming agent, 3 parts of foaming aid, 25 parts of plasticizer, and 45 parts of spray carbon black.

[0026] The chloroprene rubber brand is DCR2131.

[0027] The vulcanizing agent consists of 2,5-dimethyl-2,5-bishexane, trimethylolpropane trimethacrylate and polybutadiene.

[0028] The foaming agent and the foaming auxiliary agent are composed of foaming agent H, foaming agent OBSH and diethylene glycol.

[0029] The plasticizer consists of environmentally friendly polyol plasticizer and dibutyl sebacate.

[0030] Preparation method of high and low temperature resistant low compression permanent deformation chloroprene rubber sponge sheet Step 1: Pre-mill the chloroprene rubber in an open mill for 3-5 minutes. The roller temperature of the open mill is 35-45°C, the roller speed is 21 rpm, and the roller speed ratio is 1:1.2. Step 2: Add high-activity magnesium oxide, stearic acid, accelerator MTT, antioxidant, foaming agent, foaming aid, plasticizer, spray carbon black, vulcanizing agent, and zinc oxide compounding agent to step 1 and mix for 30-38 minutes. The roller temperature of the open mill is 35-45°C, the roller speed is 21 rpm, and the roller speed ratio is 1:1.2. Step 3: Put the rubber compound in step 2 on the mixing mill, hit eight knives 5-6 times, hit the triangle wrap 5-6 times, press the sheet, and stop for 12-24 hours; Step 4: Use a sheet press to press the rubber material from step 3 into a sheet with a thickness of 3-4 (mm) or 5-6 (mm), cut it into the width and length of the mold frame, place the semi-finished rubber blank into the mold frame, pad it with a degassing pad and cover it with a cover plate, and send it into the flat vulcanizer. The vulcanization conditions are temperature 170℃, time 30min, and pressure 2MPa. Step 5: Place the sponge in step 4 in a ventilation aging box for heat treatment. The heat treatment conditions are: raise the room temperature to 60°C, maintain for 30 minutes, then raise to 120°C, maintain for 2 hours, and naturally cool to room temperature. Example 4

[0031] A high and low temperature resistant low compression permanent deformation chloroprene rubber sponge sheet comprises the following raw materials in parts by weight: 100 parts of butyl rubber, 4 parts of highly active magnesium oxide, 10 parts of zinc oxide, 0.5 parts of stearic acid, 1.5 parts of accelerator MTT, 5 parts of vulcanizing agent, 3 parts of antioxidant 445, 5 parts of foaming agent, 4 parts of foaming aid, 28 parts of plasticizer, and 45 parts of spray carbon black.

[0032] The chloroprene rubber brand is DCR2131.

[0033] The vulcanizing agent consists of 2,5-dimethyl-2,5-bishexane, trimethylolpropane trimethacrylate and polybutadiene.

[0034] The foaming agent and the foaming auxiliary agent are composed of foaming agent H, foaming agent OBSH and diethylene glycol.

[0035] The plasticizer consists of environmentally friendly polyol plasticizer and dibutyl sebacate.

[0036] Preparation method of high and low temperature resistant low compression permanent deformation chloroprene rubber sponge sheet Step 1: Pre-mill the chloroprene rubber in an open mill for 3-5 minutes. The roller temperature of the open mill is 35-45°C, the roller speed is 21 rpm, and the roller speed ratio is 1:1.2. Step 2: Add high-activity magnesium oxide, stearic acid, accelerator MTT, antioxidant, foaming agent, foaming aid, plasticizer, spray carbon black, vulcanizing agent, and zinc oxide compounding agent to step 1 and mix for 30-38 minutes. The roller temperature of the open mill is 35-45°C, the roller speed is 21 rpm, and the roller speed ratio is 1:1.2. Step 3: Put the rubber compound in step 2 on the mixing mill, hit eight knives 5-6 times, hit the triangle wrap 5-6 times, press the sheet, and stop for 12-24 hours; Step 4: Use a sheet press to press the rubber material from step 3 into a sheet with a thickness of 3-4 (mm) or 5-6 (mm), cut it into the width and length of the mold frame, place the semi-finished rubber blank into the mold frame, pad it with a degassing pad and cover it with a cover plate, and send it into the flat vulcanizer. The vulcanization conditions are temperature 160℃, time 40min, and pressure 2MPa. Step 5: Place the sponge in step 4 in a ventilation aging box for heat treatment. The heat treatment conditions are: raise the room temperature to 70°C, maintain for 30 minutes, then raise to 100°C, maintain for 3 hours, and naturally cool to room temperature.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

[0038] Table 1 shows the properties of the sponge products of the present invention.

[0039] Table 1 .

Claims

1. A method for preparing a high and low temperature resistant chloroprene rubber sponge plate adapter compensation material, characterized in that: The method comprises the following preparation steps: Step 1: Pre-mill the chloroprene rubber in an open mill for 3-5 minutes. The roller temperature of the open mill is 35-45°C, the roller speed is 21 rpm, and the roller speed ratio is 1:1.

2. Step 2: Add high-activity magnesium oxide, stearic acid, accelerator MTT, antioxidant 445, foaming agent, foaming aid, plasticizer, spray carbon black, vulcanizing agent, and zinc oxide compounding agent to step 1 and mix for 30-38 minutes. The roller temperature of the open mill is 35-45°C, the roller speed is 21 rpm, and the roller speed ratio is 1:1.

2. Step 3: Put the rubber compound in step 2 on the mixing mill, hit eight knives 5-6 times, hit the triangle wrap 5-6 times, press the sheet, and stop for 12-24 hours; Step 4: Use a sheet press to press the rubber material from step 3 into a sheet with a thickness of 3-4 (mm) or 5-6 (mm), cut it into the width and length of the mold frame, place the semi-finished rubber blank into the mold frame, pad it with a degassing pad and cover it with a cover plate, and send it into the flat vulcanizer. The vulcanization conditions are temperature 160-170 (℃), time 30-40 (min), and pressure 1-3 (MPa); Step 5: Place the sponge in step 4 in a ventilation aging box for heat treatment. The heat treatment conditions are: raise the room temperature to 60-70℃, maintain for 20-30 (min), then raise to 100-120 (℃), maintain for 2-3 (h), and naturally cool to room temperature.

2. The method for preparing a high and low temperature resistant chloroprene rubber sponge sheet adapter compensation material according to claim 1, characterized in that: The raw material components of the chloroprene rubber sponge rubber sheet are as follows: 100 parts of chloroprene rubber, 4 parts of high-activity magnesium oxide, 8-10 parts of zinc oxide, 0.5 parts of stearic acid, 0.5-1.5 parts of accelerator MTT, 3-5 parts of vulcanizing agent, 2-3 parts of antioxidant 445, 3-5 parts of foaming agent, 2-4 parts of foaming aid, 25-28 parts of plasticizer, and 40-50 parts of spray carbon black.

3. The method for preparing a high and low temperature resistant chloroprene rubber sponge sheet adapter compensation material according to claim 1, characterized in that: The vulcanizing agent is 2,5-dimethyl-2,5-bishexane, trimethylolpropane trimethacrylate, polybutadiene and a combination thereof.

4. The method for preparing a high and low temperature resistant chloroprene rubber sponge plate adapter compensation material according to claim 1, characterized in that: The foaming agent and foaming auxiliary agent are foaming agent H, foaming agent OBSH, and diethylene glycol.

5. The method for preparing a high and low temperature resistant chloroprene rubber sponge plate adapter compensation material according to claim 1, characterized in that: The plasticizer is an environmentally friendly polyol plasticizer dibutyl sebacate.

6. The method for preparing a high and low temperature resistant chloroprene rubber sponge plate adapter compensation material according to claim 1, characterized in that: The chloroprene rubber brand is DCR2131.