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 ;)]
Applications of Synthetic Adhesives

9. Thanks