types and applications of synthetic adhesives

Education related

1. EHTISHAM UL HAQ 22.6.1.Describe types and applications of synthetic adhesives. Synthetic Adhesive

2. Synthetic adhesives are those that are not found in nature and are designed and manufactured by man, we can say that synthetic adhesives are adhesives laboratory. Synthetic adhesives are the most widely used adhesives in the various sectors that use these materials, because the mechanical, physical and chemical properties of these adhesives are far superior to natural adhesives. Synthetic Adhesives

3. There are several ways of classifying the extensive catalog of synthetic adhesives available today, among them I can mention the following : By the number of packages or components needed to produce the solidification or curing of the adhesive: 1-component adhesives - are those adhesives that are presented in a single container or package, such as moisture curing polyurethane adhesive, cyanoacrylates, silicones, moisture curing adhesives, modified silanes ... 2-component adhesives - are those adhesives whose components are separated into two different containers or packages, being necessary to mix them with the correct proportion to begin the process of solidification or curing, such as 2-component polyurethane, acrylates adhesives, epoxy 2 components ... Types of Synthetic Adhesives

4. Types of Synthetic Adhesives

5. By the structure and nature takes the adhesive polymer after curing: Thermoplastic Adhesives Elastomer Adhesives Thermoset Adhesives By the type of cure that occurs in the adhesive: Physical curing adhesives, such as contact adhesives, psa adhesives (pressure sensitive adhesives) ... Chemical curing adhesives, such as polyurethane, epoxy, acrylates adhesives... Types of Synthetic Adhesives

6. By the mechanical properties of adhesives: Elastic adhesives which have a high elongation before fracture occurs, for example silicone adhesives, silane modified adhesives, 1-component polyurethane curing by moisture ... Rigid adhesives which have high impact resistance but low elasticity, such as epoxy adhesives, anaerobic adhesives, one component polyurethane cuing by heat ... By the kind of state which is the adhesive before applying: Solids adhesives as hotmelts Liquids adhesives such as cyanoacrylates glues. Types of Synthetic Adhesives

7. PHYSICAL CURING ADHESIVES Hotmelts Solvent based adhesives Waterbone adhesives Contact adhesives Dispersion adhesives Plastisols adhesives Pressure sensitive adhesives (PSA) Polyaddtion adhesives: Epoxy adhesives Poliurethanes adhesives Silicones adhesives Hot curing rubber adhesives Polycondensation adhesives : Silicones Silanes modified Phenolic adhesives Polyamides Polimerization adhesives : Metacrylates adhesives Cyanoacrilates Anaerobic adhesives Unsaturated polyester adhesives Acrylates curing radiation Epoxy curing radiation Types of Synthetic Adhesives The classification most used to differentiate over the wide range of adhesives, is by the type of cure or solidification process that occurs in the adhesive: CHEMICAL CURING ADHESIVES

8. Synthetic Adhesives are used: To join materials by glueing . E.g. PVA (polyvinyl acetate) and Synthetic resin are used for woodwork glue, Epoxy resin is used for joining metals and plastics, Contact adhesive is used for joining polystyrene and fabrics and for fixing plastic laminates to a wooden base, Acrylic cement for the joining of acrylic and some other types of plastics. For waterproofing objects. E.g. PVA adhesives and Synthetic resin are water resistant. In garments [esp. women undergarments ;)] A pplications of Synthetic A dhesives

9. Thanks