ADHESIVES, GLUES AND SEALANTS
Humanity has always had the tendency and the obsession to classify and organize everything around us, in order to simplify the complex to understand, throughout our existence we have classified the sky and stars, we have classified the animals, minerals and plants in our planet, we have classified the mountains, rivers, countires.... and therefore we also classified adhesives, glues and sealants.
The main objective to classify the adhesives is to group the wide range of adhesives, glues and sealants that currently exist in the market, in order to relate and better understand their origin, operation and use.
A first classification of adhesives is divided according to their origin, therefore, we will have natural adhesives and synthetic adhesives.
Natural adhesives are those adhesives that are produced or extracted from natural resources such as plants or animals, starch, casein glues or natural rubber are examples of natural adhesives.
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.
There are several ways of classifying the extensive catalog of synthetic adhesives available today, among them we 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 ...
By the structure and nature takes the adhesive polymer after curing:
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...
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.
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
Polimerization adhesives :
Polycondensation adhesives :
:. PHYSICAL CURING ADHESIVES
Now that you know several ways to classify adhesives and glues, would you be able to tell me what family belongs cyanoacrylate glue?.
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