HCR can introduce various additives to enhance the required performance and apply them to different high temperature occasions. It is an ideal material for various silicone rubber products.
High Consistency Rubber (HCR) is a silicone polymer composed of high molecular weight linear polyorganosiloxane. HCR can be adapted to different end-user purposes, using different curing systems to cross-link into three-dimensional network macromolecules, and the commonly used curing systems are organic peroxide cross-linking agents and platinum catalysts. HCR has very unique characteristics, not only has excellent high and low temperature resistance, but also has excellent physical and mechanical properties and aging resistance. After HCR is cross-linked under certain conditions, silicone elastomers with different properties can be obtained, and the required silicone products can be processed by extrusion, molding, calendering and other molding processes.
HCR silicone processing
Related synonyms:HTV silicone, vulcanized rubber, high consistency silicone rubber
HCR silicone chemical structure
High Consistency Rubber (HCR) can also be called Heat Cured Rubber (HCR) or High Temperature Vulcanized(HTV) Silicone Rubber, which contains various reactive groups the high-molecular-weight linear base rubber is the main component, and add the compounding agents such as pigments, curing agents, and modification additives are added and knead in a kneader to synthesize. When designing the formula, the end user's use environment should be considered, and raw silicone rubber with different properties should be selected for preparation. Commonly used raw rubber is methyl vinyl silicone rubber, methyl silicone rubber, fluorosilicone rubber, and phenyl silicone rubber. In order to improve some performance of HCR, some components can be introduced to improve the performance, adding silica micropowder, such as fumed silica or precipitated silica, can improve the mechanical properties, aging resistance, and adhesion properties. Structure control agents containing reactive hydroxyl or alkoxy groups can also be added to ensure the processability of the base rubber. Crosslinking can be carried out by different crosslinking systems, such as condensation crosslinking systems and addition crosslinking systems. Platinum catalysts are usually used for industries with high transparency, such as food, medical, maternal and child care, and sporting goods.
HCR silicone properties
High Consistency Rubber is a rubber elastomer. Compared with other elastic systems, High Consistency Rubber (HCR) has very unique properties. It has a heat resistance and can run continuously for a long time in a high temperature environment of 200C°, still maintains high elasticity, and has almost no change in mechanical properties. It also has low temperature resistance, and its performance remains unchanged in the harsh environment of -60C°. By adding an appropriate amount of low-phenyl silicone rubber, the low-temperature resistance performance is improved, and the elasticity is still maintained even in an environment of -112°C. The elastic system also has many basic properties, such as excellent chemical stability, electrical insulation, ozone resistance, and aging resistance. Adding high phenyl silicone rubber which can improve the oxidation resistance and radiation resistance of the product. Adding fluorosilicone rubber which can impart excellent solvent resistance and oil resistance. A small amount of vinyl can also be added to improve vulcanization and reduce compression set. In addition, a platinide is added to improve flame retardant performance. By introducing new additives, changing cross-linking methods and modification techniques such as blending and copolymerization, to make HCR is more widely used in automobile, construction, electronic appliances, petrochemical, transportation, medical, light industry textile, cosmetics, aerospace and other fields.
HCR silicone uses
In the field of wire and cable, High Consistency Rubber (HCR) has almost constant performance in a wide temperature range and has excellent electrical properties, so it is the best material for making high-voltage cables. The main applications of HCR in electric power are ship cables, power cables, ignition cables, and heating cables. The HCR after adding the combustion aid can withstand 350C° for a short time, ensuring the safe transmission of high-intensity voltage, and reducing the safety hazard caused by high temperatures to a certain extent. Even if it encounters high-temperature combustion to generate SiO2, its residue will not conduct electricity and still have an insulating effect. As a material for making conventional silicone rubber wires: security transmission lines, such as control systems, building intercoms, cameras. Office equipment internal connection lines, such as printers, copiers, fax machines, scanners. Household wires, such as rice cookers, lamps, microwave ovens, air conditioners.
As a high-organosilicon molecular material, HCR has good biocompatibility, physiological inertness, and almost no reaction to human tissues. It can be used as the main raw material of medical silicone tubes, medical rubber stoppers, and medical rubber products.
Why choose Yongrui as your partner for HCR silicone
Experience
13 years experience manufacurer HCR silicone.
OEM/ODM
All kinds of HCR silicone can be produced according to customer requirements.
Certification
We can provide you with high-quality HCR silicone with SGS, ROSH and FDA certification.
Production
We use advanced machinery and equipment to produce and provide HCR silicone with stable performance and quality assurance.
