classification of resins ppt

You use Thomas' Supplier Discovery Platform to find Suppliers of Polyester Resins. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Classification according to predominating chemical constituent; e.g. COMBINATIONS 1] Classification Based on Source. Most are self- and dual-cured resins and require mixing of bases and catalysts. In order to achieve 5 ppt of sodium in the polisher effluent, sodium-form cation resin must be less than 0.33 percent when the effluent is at neutral pH conditions. See our User Agreement and Privacy Policy. Dr.U.Srinivasa, P... Morphology and microscopy of volatile oil drugs.Dr.U.Srinivasa, Professor and... Study on volatile oils and drugs, Dr.U.Srinivasa, Professor and Head, Sriniv... No public clipboards found for this slide, Introduction, Properties, Classification etc., of Resin and Resin combination drugs by Dr.U.Srinivasa, Professor and Head, Srinivas college of Pharmacy, Mangalore- Karnataka. Self-adhesive resin cements have lower bond strengths than the total etch and self-etch resin cements (Sanvin and de Rijk 2006). Resins are amorphous products of complex chemical nature. It is like an \"electrical storm\" in the brain. Coupling agents are used to improve ... – A free PowerPoint PPT presentation (displayed as a Flash slide show) on PowerShow.com - id: 3b8068-MTg2M In 1955, Buonocore used orthophosphoric acid to improve the adhe-sion of acrylic resins to the surface of the enamel. Black classified the most common sites for dental caries. In low pressure laminate decorative paper is soaked in melamine resins and dried naturally and then it will bonded over MDF,HDF or Particle Board with heat activated glue and laminator having a heat rollers for consistent and fine bond. The official definition of a seizure is \"a transient occurrence of signs and/or symptoms due to an abnormal excessive or synchronous neuronal activity in the brain.\" 1. Epoxy resins are widely used as coatings, encapsulations, structural composites, castings, and adhesives in a number of electrical applications. PH.D. according to botanical origin, e.g. – His classification system adequately describes most simple carious lesions. Polyester resinsare formed from the reaction of dibasic organic acids and polyhydric alcohols. You can change your ad preferences anytime. 2. CLASSIFICATION Based on occurrence, it is classified into five types. Assistant professor. Berberidaceae resins. DENTAL COMPOSITES REVIEW DEFINITION COMPOSITE CHEMISTRY Dental composite is composed of a resin matrix and filler materials. Abstract. Resins and Resin combinations by Dr .U.Srinivasa, Professor and Head, Sriniv... No public clipboards found for this slide. The first classification of polymers is based on their source of origin, Let’s take a look. The so -called resin -reinforced glass ionomer cements combine an acid -base reaction of the traditional glass ionomer with a self -cure It has a solid stationary phase and a liquid or gaseous mobile phase. Resin cements are typically diacrylate resins containing 50-80% glass filler particles with most particles less than 1.0 µm in size. Most of the resins are heavier than water. Examples of traditional glass ionomer cements include Ketac -Cem , Fuji I, and Shofu I. If you continue browsing the site, you agree to the use of cookies on this website. If you continue browsing the site, you agree to the use of cookies on this website. E-mail: nigeltom@live.com Received 1 October 2016; What appeals most to epoxy flooring is it’s resistance to high levels of wear and tear, making it the most long-lasting flooring options. 2. Classification of Resins. A first classification of adhesives is divided according to their origin, therefore, we will have natural adhesives and synthetic adhesives. (Family Berberidae ). Dept.of Pharmacognosy – Certain surface s of the teeth are particularly susceptible to carious lesions; others are nearly immune. Well-known alkaloids include morphine, strychnine, quinine, ephedrine, and nicotine. The … acid resins, resene resins, glycosidal resins; etc. Looks like you’ve clipped this slide to already. Plastics as polymer mixtures are composed of two or more polymers with ... Resin Temperature of use [ C] Specific weight [g/cm3] Tensile strength [N/mm2] PC 40–120 1.2 65–70 PMMA 40–90 1.18 70–76 They are transparent or translucent solids, semi-solids or liquid substances containing large number of carbon atoms. asafetida Oleo resin: resin+ volatile oil e.g. This chapter discusses in detail the different types of resin cements as to their mechanism of adhesion. Looks like you’ve clipped this slide to already. They are used for construction, laminate, auto-repair of fillers, skis, fishing rods, plane and ship components, coatings, decorative accessories, and bottles. See our Privacy Policy and User Agreement for details. 2. Oil and natural resin varnish OLEO RESINOUS varnish. Phenolic resins, amino resins, polyester resins, silicone resins, epoxy resins, and polyurethanes (polyesters, vinyl esters, epoxies, bismaleimides, cyanate esters, polyimides and phenolics) are few examples of thermosetting resins. BY This means that during a seizure, large numbers of brain cells are activated abnormally at the same time. ammoniacum Oleogum resin: resin+volatile oil+gum e.g. Title: PowerPoint Presentation Last modified by: DSG Created Date: 1/1/1601 12:00:00 AM Document presentation format: On-screen Show (4:3) Other titles – A free PowerPoint PPT presentation (displayed as a Flash slide show) on PowerShow.com - id: 5a69d5-MDdmN Alkaloid, any of a class of naturally occurring organic nitrogen-containing bases. If you continue browsing the site, you agree to the use of cookies on this website. For example, with Derakane 411 VE MEKP 1%, CoNap 0.25%, 2.4-P 0, gel time 21min @ 25C MEKP 1%, CoNap 0.25%, 2.4-P 0.2%, gel time 180min @ 25C Note: Additives (fillers) may affect resin … They are hard, electrically non-conductive and combustible masses. They are 1.Oleo resin 2.Gum resin 3.Oleo-gum resin 4.Glucoresin/ Glycoresins 5.Balsam Based on chemical constituents, it is classified as: 1.Resin Acids/ Resinolic Acids 2.Resin Alcohols/ Resin Esters 3.Resenes/ Inert Resins 5. This can occur only with significant classification of the anion and cation resins. Resins and Resin combinations by Dr .U.Srinivasa, Professor and Head, Sriniv... Isolation,identification and analysis of phytoconstituents. They are used as stabilizers, pigments and other components to form plastics. AND RESIN myrrh, asafetida, gamboges Balsam: contains aromatic acids like benzoin & cinnamic e.g. Clipping is a handy way to collect important slides you want to go back to later. CLASSIFICATION Resene: stable, neutral, unaffected by most chemical reagents or by exposure to moisture produced a hard film. High Pressure Laminates Resins are any of the chemically modified natural resins or synthetic polymers which are physically similar, including thermoplastic materials such as polyvinyl, polystyrene, and polyethylene, as well as thermosetting materials such as polyesters, epoxies, and silicones. large molecule or a macromolecule which essentially is a combination of many subunits CLASSIFICATION On the basis of their formation A. Physiological resins – these are formed as a normal product of metabolism without making injury to the plants B. Pathological Resins – formed as a result of wound, injury or abnormal circumstances (benzoin, colophony, balsams, aloe resin etc.)

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