A rubber formulation that can be vulcanized at low temperatures using aldehyde-based crosslinking agents.

Abstract

Page 1 of 4. Details of the invention? A name that reflects the invention? A low-temperature vulcanizing rubber formulation using glutaraldehyde compound as a crosslinking agent for the material. Bonding and coating Five branches of science related to invention. Materials science and technology related to low-temperature vulcanization rubber formulations using... Glutaraldehyde compounds are crosslinking agents used in bonding and coating materials. Background in the relevant art or science? The vulcanization process is the chemical reaction or curing reaction that occurs in rubber. 10. This results in the rubber molecules linking together to form a 3D network structure, making the rubber more stable in various conditions. Changes in temperature increase the elasticity and reduce the deformation of the rubber when it is released from force. This deformation reaction allows the rubber to be used extensively; however, The vulcanizing process requires heat and a vulcanizing agent to stabilize the rubber. (Agent) such as sulfur peroxide, metal oxide, or compounds with two functional groups, etc., are common. 15. Rubber vulcanization requiring the addition of vulcanizing agents is widely used in industry, although current rubber vulcanization methods... It can be done without the need for stabilizing agents; that is, it can be done using high-energy radiation. This method requires expensive equipment, environmentally friendly and effective radiation sources. This method is only suitable for applications requiring the preservation of thin rubber products; therefore, it is not commonly used. The industry, which recently published a study on a simple natural rubber vulcanization process. 20. Low temperature using glutaraldehyde as a barrier agent; this process has several advantages. For example, it uses fewer chemicals, can be processed at low temperatures, has low processing costs, and is safe to process. Highly energy efficient and environmentally friendly, etc. The report on related materials, in which the author selected to review literature specifically on groups with characteristics and for... The objectives are similar and the details are as follows: 25. The vulcanization of natural rubber with glutaraldehyde was first reported in 2012 by Johns and… The researchers found that natural rubber can be crosslinked with glutaraldehyde using a low vulcanization temperature (45-50°C). o C) The research team studied this by using glutaraldehyde in combination with medium-ammonia-containing natural rubber latex. (medium ammonialatex, 0.47%) Crosslinking of natural rubber molecules was observed, resulting from a reaction. The reaction of ammonia in natural rubber with glutaraldehyde is called an enereaction, which will produce... 30 The product is pentane-1,5-diylidenediamine. Then, experimental films were prepared. This study investigated the optimal amount and concentration of glutaraldehyde in 30 ml of vulcanized latex. At a temperature of 45 degrees Celsius, it was found that the level of crosslinking bonds increased with increasing amounts of glutaraldehyde. The mechanical and thermal properties of natural rubber are relatively low, such as tensile strength. Approximately 4.00 MPa, so the original research group, Johns et al. (2015), continued the study to find the conditions under which... 35. The optimal composition between ammonia and glutaraldehyde for mechanical and thermal properties was found to be the best for vulcanized rubber. Ammonia concentration of 0.9% by weight and 15 ml of glutaraldehyde at a concentration of 2 of 4 pages. 10% exhibits the best thermal stability and shows the highest tensile strength (~7.00MPa), but when... Using more than 15 ml of glutaraldehyde, the tensile strength tended to decrease. The research group led by Kalkornsurapranee et al. (2017) wanted to compare the properties of natural rubber. Vulcanization? Using glutaraldehyde with natural rubber vulcanized using sulfur as a crosslinking agent, it was found that the rubber... 5. Vulcanization? By using glutaraldehyde as a crosslinking agent at a molar ratio of ammonia to glutaraldehyde 1:1. (or 1.0 moleratios) shows the highest tensile strength (~8.00 MPa) but is still inferior to vulcanization. With a sulfur system (~24.00MPa), while thermal property studies found that vulcanized natural rubber by o Using glutaraldehyde as a crosslinking agent provides higher heat resistance (T~387C) compared to other methods. 50 o With the sulfur system (T~362C) and in the same year, a research group by Kalkonsurapranee et al. studied... 50 10. Improving the mechanical properties of vulcanized natural rubber using glutaraldehyde as a crosslinking agent. Blending natural rubber with polyvinyl alcohol has been found to significantly improve its mechanical properties. The mechanical properties obtained tend to increase with higher polyvinyl alcohol content. Furthermore, improvements were studied. The use of molecularly modified rubber latex grafted with polymethyl methacrylate (NR-g-PMMA) was found to be... o Mechanical properties are increased by up to twice (~16.00MPa), and thermal properties (T~385C) are also better than rubber. 50 o 15. Natural, unmodified molecular formulations (T~387C) from such modifications tend to retain their properties. 50 The vulcanization of natural rubber using glutaraldehyde as a crosslinking agent can increase its yield, as reported in research in 2019. Lehman et al. studied improvements using nanoclay fillers in combination with blending. With polyvinyl alcohol, it was found that adding nanoclay at a concentration of 1 phr could improve mechanical and other properties. It can withstand heat and also offers the best resistance to swelling from engine oil, as a guideline for... 20. Practical applications in the future. Therefore, the research shows that natural rubber vulcanized using this system is feasible. It has high potential for application as a material for high-temperature applications, but there are limitations for its use in various products. Due to the relatively low mechanical properties of the rubber, high strength is required. Therefore, it is necessary to improve the mechanical properties of the rubber. Naturally vulcanized? By continuously using glutaraldehyde as a crosslinking agent. 25. From searching patent / utility model databases, both in Thailand and abroad, it was found that: The patents / utility models that are similar to this invention are: Thai patent number 9440 provides details about the vulcanization process of natural rubber. High ammonia concentrations are achieved at low temperatures using a compound containing an aldehyde group as a crosslinking agent, specifically concentrated glutaraldehyde. 10% by volume, 1 part as a crosslinking agent to 4 parts of natural rubber. Results of natural rubber testing. 30 vulcanized materials prepared using this method were found to have a very high tensile strength of over 6 MPa and a long elongation distance at break. More than 800 times stronger, however, the vulcanization process of natural rubber does not include the addition of auxiliary substances. Processing and improvement of mechanical properties of natural rubber (Page 3 of 4) A review of the aforementioned invention revealed that the prepared process still had relatively low mechanical properties. This is a limitation for its application to a wide range of products, therefore improvements or development are needed. Improving this process is therefore interesting, as it is one of the common methods for improving the properties of natural rubber. Popular methods include blending natural rubber with synthetic rubber or other polymers to improve its properties. 5. And to increase the viscosity of natural latex, polyvinyl alcohol (PVA) is generally preferred. It is most commonly mixed with natural rubber because polyvinyl alcohol (PVA) is a type of polyoplastic thermoplastic. A special type of film-forming material is polyvinyl alcohol. In addition, it has adhesive and durability properties. It dissolves organic matter very well and also has good resistance to oxygen permeation, making it suitable as an adhesive and bonding agent, etc. In addition, there are other types of thickening agents such as hydroxyethylcellulose (HEC). 10. Carboxymethylcellulose (CMC), for example, is a viscosity modifier in latex. Natural rubber is equally popular, so processing it with thickeners is a good idea. An interesting approach for improving the properties of natural rubber that has been vulcanized at low temperatures using... Glutaraldehyde is a crosslinking agent. Characteristics and purpose of the invention. 15. This invention proposes a low-temperature vulcanization rubber formula using glutaraldehyde compound as a binder. Crosslinking for bonding materials and coatings is a low-temperature vulcanized rubber formulation using... Glutaraldehyde compounds are crosslinking agents composed of high-ammonia latex and additives. Viscosity enhancers? Vulcanizing agents and thickeners. The purpose of this invention is to create a low-temperature vulcanized rubber formula using glutaral compounds. 20-dehyde is a crosslinking agent for bonding and coating materials to create novel rubber products. Nature does not require machinery or the use of large amounts of chemicals in production, while also reducing energy consumption. It has very low production and, importantly, low processing costs, so this invention represents a new approach for the industry. Rubber will have a direct impact on the economy and society by increasing the value of Thai rubber and reducing... Importing rubber products from foreign countries, and due to the simple processing method, communities can process them themselves. 25 people working together can help increase community income, create jobs for community members, and ultimately improve the quality of life for those in the community. Complete disclosure of the invention. The process of transforming natural rubber with thickeners using low-temperature vulcanization techniques. Using glutaraldehyde as a crosslinking agent, this invention has three main components: High ammonia-containing latex (60% HA) in 100 parts. 30? Add 1-30 parts of viscosity enhancer by weight of rubber. Vulcanizing agent in an amount of 5-50 parts by weight of rubber. Add 1-30 parts of the rubber by weight as a filler. High ammonia content latex, as defined by this invention, refers to natural latex that has undergone processing. Initially, it is concentrated latex, which is natural latex that has undergone various latex processing methods, including: 35. Evaporation of water, creaming method, electrolytic separation method, and milling method, resulting in a dry rubber content of 60% (DRC). Page 4 of 4. The total solids content (TSC) in the latex is 50%, and the latex preservative used is a high concentration of ammonia. (Approximately 0.5–5% NH) which can help preserve the latex for a longer period of time. 3 This invented viscosity enhancer refers to a type of water-soluble polymer, such as... Polyvinyl alcohol (PVA), hydroxyethyl cellulose (HEC), or carboxymethyl cellulose (CMC) with The concentration of any one substance is in the range of 1-20% by weight. Vulcanizing agent? According to this invention, refers to a bifunctional aldehyde compound. Carboxaldehyde (or – ) is an organic compound whose functional group is the carboxaldehyde group. CHO is located in hydrocarbon molecules and can be selected from glutaraldehyde and glyoxal. Or phthaldialdehyde at a concentration of 5-20% or another one. The 10 types of fillers mentioned here refer to other fillers added to latex to improve its properties. It improves and simplifies the processing, and can be selected from rubber crumb powder and black rubber granules. Calcium carbonate, clay, and talcum with a concentration in the range of 1-30%. One way or another What is the best way to invent something? 15. As previously stated in the section on complete disclosure of the invention...

Claims

OCR10KL (26 / 09 / 2568) 1. A low-temperature vulcanizable rubber formulation using an aldehyde-based crosslinking agent, with the following components: - High-ammonia latex concentrate with 60% dry rubber content by weight, in the amount of 100 parts by weight. - Viscosity enhancer in the amount of 1-30 parts by weight. - Vulcanizing agent in the amount of 5-50 parts by weight. - Body filler in the amount of 1-30 parts by weight. The viscosity enhancer can be selected from a water-soluble polymer, such as hydroxyethyl cellulose (HEC) in liquid form. A vulcanizing agent of 1-10% by weight or liquid carboxymethyl cellulose of 1-10% by weight can be selected from bifunctional aldehyde compounds, which are organic compounds with a carboxaldehyde (or -CHO) functional group in the hydrocarbon molecule. The chosen compounds are glutaraldehyde, glyoxal, or phthaldialdehyde, with a concentration in the range of 5-20% by volume.A low-temperature vulcanizable rubber formulation using an aldehyde-based crosslinking agent under claim1, where the high-ammonia latex concentrate has a dry rubber content of 60% by weight (DRC), a total latex solids of 40-60% by weight (TSC), and the latex stabilizer is ammonia with an ammonia content of 0.5-5% by weight;