Platinum cured tube platinumcatalysed addition curing is a faster process than peroxide curing which involves just one controlled reaction and which produces no undesirable byproducts. Tin or platinum cured rtv silicone rubber specialty resin. Silicone rubber platinum cure also known as additioncure silicone mold rubber, platinums exhibit the lowest longterm shrinkage and have the longest library life of all mold rubbers with a price tag to match. In the late 1960s and early 1970s, willing of dow coming 18 and karstedt of ge 1 5 described the reac tion of chloroplatinic acid and vinylcontaining siloxane monomers to make silicone soluble platinum complexes. Low volatile grade, platinumcured silicone tubing is clean room produced for critical pharmaceutical, biopharm, cosmetic, and food applications. These longlife silicone stoppers are fully autoclavable and sterilizable and will not crack, spallate or invoke particle migrations that can. Platinumcured silicones for medical devices and equipment. It offers high temperature resistance and fewer potential leachables.
The platinum can become deactivated by coming in contact with certain chemical species. Temperature of cureselection of platinum catalysts generally controls the preferred temperature of cure. Temperature range for platinumcured silicone tubing is 100f to 400f. Thermo scientific nalgene pharmagrade platinumcured. Any processes in which the ability to withstand temperature extremes, radiation, corona, ozone exposure, moisture, andor steam is desired. For nalgene carboys and bottles polypropylene closures, platinum cured silicone inserts flexible silicone top works systems include solid, 2port and 3port versions. For pharmaceutical and biotechnology applications platinumcured silicone tubing is an exceptional choice for fluid transfer. What gasket fabricators need to know many gasket fabricators want to enter the medical marketplace or increase their sales to manufacturers of medical devices and equipment. Pdf hydrosilylation is a reaction widely used in the silicones industry for the preparation of monomers, containing siliconcarbon bonds, and for. Silicone rubbers are widely used in industry, and there are multiple formulations. Premium grade peroxide free silicone sheeting is designed to be used where higher physical properties are required and in applications that require a low volatile and low outgassing material. United chemical technologies uct is a major manufacturer of high quality silicones. The liquid silicone rubber lsr used in this study was elastosil lr300350 and was obtained from wacker. Platinum cure silicone, also called addition cure silicone, are twocomponent high tear strength and flexible mold or casting compounds.
Platinumcured silicones are available as a highconsistency rubber, sometimes referred to as gumstock, as well as liquid silicone rubber or lsr. Specialty silicone products ssp supplies an ultraclean line of platinum cured silicones that are fda, usp class vi, and rohs compliant. Benefits of platinum cured silicone viper performance. Market research can be challenging, however, and some companies may believe incorrectly that all medical gaskets require cleanroom fabrication. Silicone rubbers are characterized principally by the following properties. Advantasil apst platinum cured tubing has undergone extensive physical, chemical, and biological testing, and meets usp class vi, fda cfr 177. Where to buy platinumcure silicone reynolds advanced materials.
Additionally,tygon 3350 silicone tubing meets 3a sanitary standards,fda 21cfr part 177. Platinum cured silicone elastomer peroxide cured silicone elastomer ethylenepropylene diene monomer polytetra fluoro ethylene poly steel polymer. Mar 24, 2017 small scale test while making registration keys for my mask mold. The platinum cured high consistency rubber platinum cured hcr used in this study was elastosil r400050 and was obtained from wacker. Platinum cured silicones are available as a highconsistency rubber, sometimes referred to as gumstock, as well as liquid silicone rubber or lsr. Excellent heat resistance, low compression set, odorless, nontoxic, translucent.
This flexible, durable highpurity translucent tubing is designed for a variety of pump and transfer applications, including pharmaceutical, laboratory and bioprocess manufacturing. In its uncured state, silicone rubber is a highlyadhesive gel or liquid. As a result, silicone is often excluded from designs. Buy masterflex platinumcured silicone tubing, ls 24, 25 ft. Silicone elastomer can be crosslinked cured or vulcanized into solid forms through a variety of cure systems. Fur ther, because of the chemis t ry involved, platinu m material s are inherently flame retardant.
It is made from silicone polymers that are extruded then crosslinked and cured in to solid form using an assortment of curing methods. Chemical structure of a linear silicone polymer polydimethylsiloxane. Platinum silicone tubing for pharmaceutical and biotech. Platinum catalyzed hydrosilylation of polydimethylsiloxane. The chemistry of silicones is summarized by following the steps necessary to produce a twopart, platinumcured silicone containing vinylstopped polydimethylsiloxane, sihonchain siloxane, platinum catalyst and catalyst inhibitor.
Flow ranges are approximatecalculated under the following conditions. The chemical difference between tincure condensation cure and platinumcure addition cure silicone mold making rubbers lies mainly in the metal used to catalyze or cure the base rubber. The two most common of these methods are platinum catalyzed addition. Silicon is reacted with mecl to make methylchlorosilanes. Silicone resists many chemicals, including water, isopropyl alcohol, some acids, oxidizing chemicals, and. High purity platinumcured silicone is often used in the production of pharmaceutical. They are recommended as a mold material for casting polyurethane, epoxy, or polyester resins, wax and a wide range of other casting materials. Platinum cure silicones ssp4749 is a series of translucent heat cured silicone elastomers. Dec 09, 20 from here, we get our two major flavors of silicone tubing. Steamforsterilization is the only recommended exposure to steam.
Silicone tubing has many advantageous physical and chemical. Platinum cure silicones custom silicone gaskets, custom. These silicone rubber products are particularly suited for extrusion applications since they eliminate premixing steps associated with alternative twopart platinum cured materials. Advantasil apst platinumcured silicone tubing unreinforced. Platinumcure silicones the engineer guy atlanta, ga. For custom tubing lengths and configurations, please contact our product applications specialist our contact information is located at the top of the web. Specialty silicone products ssp supplies an ultraclean line of platinumcured silicones that are fda, usp class vi, and rohs compliant. Platinum addition cured silicone rubber uses a platinum catalyst and uses heat to transform from a liquid to a solid. Identifying chemicals that cause inhibition in platinum. Addition cure chemistry provides an extremely flexible basis for formulating silicone elastomers. Silicone tubing has many beneficial properties and has been utilized in medical and pharmaceutical applications for over 50 years. Platinum cured silicone tubing is fused through stopper to form onepiece closure system. Platinum in cyclic vinylsiloxanes is usually used in high temperature cures. Cured silicone slides across itself and different surfaces.
Addition cure systems make use of vinylfunctional polymers and a catalyst, such as platinum, to jump start the reaction most cure methods will use either an organometallic complex or a platinum salt. In each case, a 3roller pump head was utilized operating at 600 rpm under room temperature 73f. They exhibit extremely low shrinkage and high physical properties. High purity platinum cured silicone is often used in the production of pharmaceutical. Peroxide cured silicones for septa specialty silicone products ssp uses platinumcured silicones to produce septa that are ultraclean for analytical purity. Apr 06, 2017 platinum addition cured silicone rubber uses a platinum catalyst and uses heat to transform from a liquid to a solid. Also known as additioncure silicone mold rubber, platinums exhibit the lowest longterm shrinkage and have the longest library life of all mold rubbers with a price tag to match. The detail reproduction in this area is lost and cannot be reclaimed, the mold will need to be remade. Platinumcure technology eases processing 01 molded.
So, which is better, platinum or peroxide silicone. The process begins with silicon dioxide and follows the steps of conversion to sand to elemental silicon. Hydrosilylation reactions are catalysed by highly active platinum catalysts, such as the. This is normally carried out in a twostage process at the point of manufacture into the desired shape, and then in a prolonged postcure process. Platinumcured silicone platinumbased curing systems are sometimes called addition cure systems, because there is a silicone hydride polymer that adds across the double bond of a vinyl functional siloxane polymer in the presence of a platinumbased catalyst to create a crosslinking reaction. Sulfur cured elastomers can significantly alter a process. While outgassing is a valid concern for a number of sensitive applications, there is a broad lack of understanding about silicone outgassing, as well as much misperception and confusion. What are the major differences between tincure condensation.
Platinum cured silicone s unique properties lend it to a wide range of potential applications, including. These materials are costeffective to convert and can be customfabricated into various sizes and shapes. Silicone rubber is an elastomer rubberlike material composed of siliconeitself a polymercontaining silicon together with carbon, hydrogen, and oxygen. Platinumcured tygon 3350 silicone tubing complies fully with the requirements of the usp class vi criteria and is entirely nontoxic, nonhemolytic and nonpyrogenic. Platinumcured silicones for medical devices and equipment medical device and medical equipment manufacturers need highpurity silicones for tubing, cables, seals, gaskets, and other components. Oct 27, 2015 this platinumcured silicone tubing has slightly better clarity than peroxidecured tubing. Once the catalyst is deactivated or poisoned, the affected area of silicone may never cure to the proper state of cure meaning the inhibited area may stay runny, sticky, or fluid. The peroxide cured high consistency rubber peroxide cured hcr was hv3 622 base rubber and. Platinum addition cured silicones can be heat accelerated, for every 10 degrees above 70f you can reduce the cure time in half, so if you heat the platinum cured silicone at 150f it will be ready to use in 2030 minutes. Apr 15, 2019 when high quality, crucial quantities, or recurrent purification is allimportant, platinum cure system is the best choice. Portfolio of validation solutions for the pharmaceutical.
Pdf platinum catalysts used in the silicones industry. Platinumcure technology eases processing 01 molded silicone. The principal steps in the development of silicone chemistry are1,2. It is normally, yet not all around, a more affordable option in contrast to platinum cured silicone. See 9611924 for the irradiated version of this tubing. Masterflex ls highperformance precision pump tubing. Platinum catalysts used in the silicones industry their synthesis and activity in hydrosilylation by larry n. Platinum cured silicone or peroxide cured silicone. Pharmaceutical, biotech, peristaltic pumping, and food applications characteristics. Possible inhibitors i used during sculpting are 99% alcohol, odorless mineral spirits, and. Temperature of cure selection of platinum catalysts generally controls the preferred temperature of cure. New material developments in the past, one of the drawbacks to platinumcured silicone has been th e necessity of supplying th e mate rial in two pa rts. Compared to peroxidecured silicones, our platinumcured elastomers are more inert and less likely to interact with your samples.
On the other hand, the peroxide cure system is a better choice for costeffective, flexible, and undemanding products. For this reason platinum cured silicone tube is now the. Rfsc tubing has undergone extensive physical, chemical and biological testing and meets usp class vi, fda, cfr 177. Radiationcured silicone polymers for use in release liners.
Inhibition is when the silicone rubber will not cure correctly. Radiationcured silicones incorporate two basic systems. Egosil tape 960 is a prefabricated, heat cured silicone rubber tape, plasticiserfree, permanently flexible, resistant to ageing and uv radiation for sealing construction joints, especially for repair of defective joints between prefabricated building components. Determination of silicone crosslinking the measurement of the silicone curing is a very important indicator for the production of release liners as it affects production parameters, like oven temperature and track speed, as well as product properties. From here, we get our two major flavors of silicone tubing. Platinum cured tygon 3350 silicone tubing complies fully with the requirements of the usp class vi criteria and is entirely nontoxic, nonhemolytic and nonpyrogenic. Buy masterflex platinumcured silicone tubing, ls 15, 25 ft. The rapid reaction of the platinum catalyst means that thicker section parts can be cured in a faster time at the same moulding temperatures as the usual peroxide system silicone rubber manufacturer primasil supplies compound, mouldings, extrusions and tubing for many industries including the medical. Silicones and siliconemodified materials american chemical. Small scale test while making registration keys for my mask mold. May 04, 2000 the chemistry of silicones is summarized by following the steps necessary to produce a twopart, platinum cured silicone containing vinylstopped polydimethylsiloxane, sihonchain siloxane, platinum catalyst and catalyst inhibitor. Applications for platinum cured silicones ssp supplies platinum cured silicones as continuous rolls, compressionmolded sheets, and readytomold compounds. Silbrade platinum should not be used for steam transfer or continuous steam opeartions. Platinum cured silicone is designed to increase the productivity of the moulding operation.
Platinumcured silicone tubing is cleanroom produced for critical pharmaceutical, biomedical, cosmetic and food applications. This flexible, durable highpurity translucent tubing is designed for a variety of pump and transfer applications, including pharmaceutical, laboratory and. Platinum cured silicone or peroxide cured silicone comparison. Silicone provides excellent biocompatibility and chemical inertness to maintain the purity of sensitive fluids. To explore novel coatings with potential for easy release of ice icephobicity, a series of platinumcured silicone coatings was prepared incorporating syloff 7210, designated mqr, as a nanoscale reinforcing component. Platinum cure silicone inhibition test and registration keys. Overall, both curing systems produce quality silicone materials if manufactured to high standards and specifications. Its high temperature resistance and fewer potential leachables. Silicone tubing typical platinum cured silicone comparative peristaltic pump tubing life the table below depicts hours until failure of 14 id x 38 od tubing.
Platinum cured silicone tubing tri clamps rubber fab. While the use of peroxide activated cure chemistry for vinylmethylsiloxanes is. To explore novel coatings with potential for easy release of ice icephobicity, a series of platinum cured silicone coatings was prepared incorporating syloff 7210, designated mqr, as a nanoscale reinforcing component. The bond forming chemistry is the platinum catalyzed hydrosilylation reaction which proceeds according to. Silicone rubbers are often one or twopart polymers, and may contain fillers to improve properties or reduce cost. When high quality, crucial quantities, or recurrent purification is allimportant, platinum cure system is the best choice. While good for making molds for casting a variety of materials, platinums also have application and physical properties that other rubbers do not. The rapid reaction of the platinum catalyst means that thicker section parts can be cured in a faster time at the same moulding temperatures as the usual peroxide system silicone rubber manufacturer primasil supplies compound, mouldings, extrusions and tubing for many. Substances that may inhibit polyaddition platinum cure silicones. The metal tin is used to catalyze or cure tin silicone, and platinum is used to cure platinum silicone rubber. The most common method for the determination of the silicone. If exposed to repeated steam sterilization or long term high temperature or pressure, silicone will eventually become gummy. Using these methods minimize potential reactions with the respective process fluid applications and can uphold pure water and process fluid standards.
In order to convert to a solid, it must be cured, vulcanized, or catalyzed. Due to its advantages as listed above there are many industries now seeking platinum cured silicone products. Platinumcured silicones unique properties lend it to a wide range of potential applications, including. Platinum cured silicone platinum based curing systems are sometimes called addition cure systems, because there is a silicone hydride polymer that adds across the double bond of a vinyl functional siloxane polymer in the presence of a platinum based catalyst to create a crosslinking reaction. Product shore a tensile psi elongation % tear b ppi specific gravity. Some applications mazy require additional postcuring of the peroxide cured silicone rubber to improve mechanical properties e. Outstanding lowtemperature flexibility and hightemperature resistance. Introduction release liners based on silicone chemistry pdms with polyolefin substrates are a very. Platinum cured silicone tubing at thomas scientific. Ensure consistently reliable and accurate fluid transfers with thermo scientific nalgene pharmagrade platinumcured silicone tubing for peristaltic pumpsis. Before we discuss basic silicone structures and curing mechanisms,it is.
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