Basic information
Epoxy Resin（CAS: 61788-97-4） is created by mixing two resins together to create a highly durable product that can be used in a wide range of industrial applications, such as for protective wall and floor systems. Epoxy resin has strong adhesive qualities, which makes it a very versatile product for a number of industries. Its resistance to chemical and heat applications make it an ideal tool for anything that needs to have a strong hold under pressure. Its durability allows it to be used with a variety of materials, such as glass, metal, wood, china, and fabric. Along with industrial practices, it is also used commonly by woodworkers, artists and home hobbyists on everything from dining tables to coasters.
| Applications | Material to be glued | Main features | Main Uses |
| Civil Engineering Construction | Concrete, wood, metal, glass, thermosetting plastic | Low viscosity, can be cured on wet surface (or water), low temperature curing properties | Concrete repair (jointing of old and new surfaces), repair of cracks in exterior walls, bonding of paneling, connection of sewer pipes, bonding of floors, reinforcement of building structures. |
| Electrical and Electronic | Metal, ceramic, glass, FRP and other potential solid plastics | Electrical insulation, moisture resistance, thermal shock resistance, heat resistance, low corrosion | Electronic components, integrated circuits, LCDs, CD-ROMs, speakers, heads, cores, battery boxes, parabolic antennas, printed circuit boards |
| Space Aviation | Heat resistance, impact resistance, moisture resistance, fatigue resistance, radiation line resistance | Bonding of homogeneous metals and dissimilar metals, bonding of honeycomb cores and metals, composite materials, bonding of switchboards | Bonding of homogeneous metals and dissimilar metals, bonding of honeycomb cores and metals, composite materials, bonding of switchboards |
| Drainage and water supply | Metal, concrete | Pipeline and aqueduct lining, pipe joint sealing | Epoxy-modified aromatic amines |
Ordinary liquid epoxy resin appearance
Epoxy resins have secondary hydroxyl groups and epoxy groups, and the secondary hydroxyl groups can react with isocyanates. Epoxy resin is directly added to the hydroxyl group-containing component of the polyurethane adhesive as a polyol. Using this method, only the hydroxyl group participates in the reaction, and the epoxy group fails to react.
Use the carboxyl group of the acid resin to open the epoxy ring, and then react with the isocyanate in the polyurethane adhesive. It is also possible to dissolve the epoxy resin in ethyl acetate, add phosphoric acid to heat the reaction, and add its adduct to the polyurethane adhesive to improve the initial adhesion, heat resistance and hydrolysis stability of the adhesive. Alcohol amines or amines can also be used to react to form polyols, and the presence of tertiary nitrogen atoms in the adducts can accelerate the NCO reaction.
Using epoxy resin as the polyol component combines the advantages of polyurethane and epoxy resin, and has good bonding strength and chemical resistance. The epoxy resin used in the manufacture of polyurethane adhesives generally uses EP-12 and EP-13 , EP-16 and EP-20 and other varieties.
Method of use
Dosage
Add and use according to the user's formula.
Storage
This product has stable performance in long-term indoor storage at 5℃-35℃.
Package product
Packed in 25kg plastic drum.
1. Various forms.
2. Convenient curing. Choose a variety of different curing agents, epoxy resin system can be cured almost in the temperature range of 0 ~ 180 ℃.
3. Strong adhesion. The existence of polar hydroxyl groups and ether bonds inherent in the epoxy resin molecular chain makes it have high adhesion to various substances. The low shrinkage of epoxy resin when curing and the low internal stress generated also help to improve the adhesion strength.
4. Low shrinkage.
5. Mechanical properties. After curing, the epoxy resin system has excellent mechanical properties.
6. Electrical properties.
7. Chemical stability.
8. Dimensional stability.
9．Mold resistance.
Classification details
Type classification
According to the molecular structure, epoxy resins can be broadly classified into five categories:
1. Glycidyl ether epoxy resin
2. Glycidyl ester epoxy resins
3. Glycidyl amine epoxy resins
4. Linear aliphatic epoxy resins
5. alicyclic epoxy resins
User's Guide
Basic Introduction
Epoxy resins and epoxy adhesives are non-toxic in themselves, but many epoxy resins are "toxic" because solvents and other toxic substances are added during the preparation process, and the domestic epoxy resin industry is trying to keep epoxy resins "non-toxic" through water-based modification and avoiding adding. The domestic epoxy resin industry is trying to keep the epoxy resin "non-toxic" by water-based modification and avoiding additive. Epoxy resins are generally used together with additives to obtain application value. Additives can be selected according to different uses, and the common additives are as follows: (1) curing agent; (2) modifier; (3) filler; (4) diluent; (5) others. Among them, the curing agent is an essential additive, whether for bonding agent, coating, casting material are required to add curing agent, otherwise the epoxy resin can not be cured. Because of different performance requirements, there are different requirements for epoxy resin and curing agent, modifier, filler, diluent and other additives.
Operation requirements
Selection of curing agent
1. Curing agent type:
Epoxy resin raw material
2、The amount of curing agent
(1) amines for crosslinking agent according to the following formula:
Amine dosage = MG/Hn, where: M = molecular weight of amine; Hn = number of active hydrogen; G = epoxy value (epoxy equivalent per 100 grams of epoxy resin)
(2) Calculated by the following formula when using anhydride:
The amount of anhydride = MG (0.6~1)/100 where: M = molecular weight of anhydride; G = epoxy value (0.6~1) is the experimental coefficient
3. Principle of choosing curing agent: The curing agent has a great influence on the performance of epoxy resin, and is generally chosen according to the following points.
(1) Choose from the safety: generally require a small toxicity is good, to facilitate safe production.
(2) Choose from the cost.
Selection of modifier
(1) polysulfide rubber: can improve the impact strength and peel resistance.
(2) polyamide resin: can improve the brittleness, improve the bonding ability.
(3) polyvinyl butyral: improve impact tanning resistance.
(4) Nitrile rubber: improve impact tanning resistance.
(5) phenolic resins: can improve the temperature and corrosion resistance.
(6) Polyester resins: improve impact tannin resistance.
(7) Urea-formaldehyde melamine resin: increase chemical resistance and strength.
(8) furfural resin: improve static bending performance, improve acid resistance.
(9) Vinyl resin: improve peel resistance and impact strength.
(10) Isocyanate: reduce moisture permeability and increase water resistance.
(11) Silicone resin: improve heat resistance.