Characteristics of organic and inorganic adhesives

There are many types of adhesives covering a wide range of areas, so there are many classification methods. Currently, the following are commonly used kind.

(1) Press Type classification of the basic components of adhesives (stickers) Can be divided into organicwuhewuThere are two categories: mechanical and mechanical. Organic matter can be divided into two types: synthetic resin type and natural type; while inorganic matter can be divided into: silicate type, phosphate type, sulfate, Metal oxide gel, glass ceramic adhesive and other low melting point substances.

① There are 4 types of synthetic resins: .

ThermosetResin type phenolic resin, resorcinol formaldehyde resin, urea-formaldehyde resin, epoxy resin, unsaturated and polyester, polyisocyanate, acrylic diester, silicone, polyimide, polyphenylimidazole.

Thermoplastic resin type polyethyl acetate, vinyl chloride-vinyl acetate, acrylate, polystyrene, polyamide, alkyd resin, fiberdimensional element,Cyanoacrylate, saturated polyester, polyurethane.

RubberType Recycled rubber, styrene-butadiene rubber, butyl rubber, chloroprene rubber, polysulfide rubber, silicone rubber, polyurethane rubber.

Mixed type phenolic-polyvinyl acetal, phenolic-chloroprene, Phenolic-cyano rubber, epoxy-phenolic, epoxy-polyamide, epoxy-cyano rubber, epoxynylon.

Natural types are also divided into4kind

Glucose derivatives Starch, soluble starch, dextrin. Gum Arabic, sodium alginate.

Amino acid derivatives plant protein, Casein, blood protein, bone glue, fishglue,

Natural resin lignin, tannin, rosin, shellac, lacquer.

Asphalt Asphalt ester, asphaltene.

(2) According to the characteristics of the curing process of the adhesive, it can be divided into four types: .

①Chemical reaction curing adhesive such as Epoxy resin glue, phenolic-nitrile glue, etc.

②Hot melt adhesive such as polyethylene hot melt adhesive , polyamide hot melt adhesive, etc.

③ Thermoplastic resin solution adhesive such as polyvinyl chloride solution glue, polycarbonate Ester solution glue, etc.

④Pressure-sensitive adhesives such as polyisobutylene pressure-sensitive adhesive, etc.

Use this classification method to clarify the characteristics of the curing process to facilitate practical applications. In modern industrial applications, especially for the bonding of metal components, chemical reaction curing adhesives occupy a dominant position. .

(3) Adhesives can be divided into five types according to their main uses.

① Structural adhesives are used for bonding stress-bearing structural parts. They are a type of adhesive most commonly used in the aviation industry. Commonly used Oxybutylene adhesive, etc.

②Universal adhesive

a. Used for placement of non-stressed metal parts;

b. Used fornon-metallic materials with low body strength such as wood and ceramics Gluing of other materials,

c.Used for the repair of electromechanical equipment, automobiles, and tractor parts. The strength requirements of this type of glue are very high, but the application process is convenient and the price is cheap. Commonly used general-purpose glues such as epoxy resin adhesives. Spacer acrylic adhesive, polyurethane adhesive, etc.

For sealing adhesiveFA liquid seal that replaces solid gaskets and is superior to solid gaskets in connection parts of various machinery, vehicles, pipelines, instruments, etc. Material.

It is currently under vigorous development, such as nylon sealant, Silicone rubber sealant, etc.

Adhesives for soft materials are used for bonding rubber, soft plastics and Fiber fabrics, etc. Commonly used ones include polyurethane adhesives, synthetic rubber glue, etc.

Special adhesive The special adhesive not only has a certain bonding strength, but also is electrically conductive, magnetically conductive, high temperature resistant, ultra-low temperature resistant, etc.Features,Commonly usedWith phenolicConductive adhesives, epoxy resin spot welding adhesives, ultra-low temperature polyurethane adhesives, etc.

in-bottom:0;text-align:justify;text-justify:inter-ideograph;line-height:21px”>②Universal adhesive

a. Used for placement of non-stressed metal parts;

b.forAdhesive bonding of non-metallic materials with low body strength such as wood, ceramics and other materials,

c.Used for the repair of electromechanical equipment, automobiles, and tractor parts . The strength requirements of this type of glue are very high, but the application process is convenient and the price is cheap. Commonly used general-purpose glues such as epoxy resin adhesives. Spacer acrylic adhesive, polyurethane adhesive, etc.

For sealing adhesiveFA liquid seal that replaces solid gaskets and is superior to solid gaskets in connection parts of various machinery, vehicles, pipelines, instruments, etc. Material.

It is currently under vigorous development, such as nylon sealant, Silicone rubber sealant, etc.

Adhesives for soft materials are used for bonding rubber, soft plastics and Fiber fabrics, etc. Commonly used ones include polyurethane adhesives, synthetic rubber glue, etc.

Special adhesive The special adhesive not only has a certain bonding strength, but also is electrically conductive, magnetically conductive, high temperature resistant, ultra-low temperature resistant, etc.Features,Commonly usedWith phenolicConductive adhesives, epoxy resin spot welding adhesives, ultra-low temperature polyurethane adhesives, etc.