Rigid agent refers to a substance that can increase the flexibility of the adhesive membrane layer.Some heat solid resin adhesives, such as epoxy resin, phenolic resin, and unsaturated polyester resin adhesives, have a low elongation rate and large brittleness. It is easy to crack when the bonding site is affected, and quickly expands it quickly., Resulting in the cracking of the rubber layer, not tolerant to fatigue, and cannot be used as structural bonding.
The purpose of a tough agent
Rigid agent is a type of auxiliary agent that reduces the brittleness of composite materials and improves the resistance of composite materials.It can be divided into two types: active tough agent and non -active tough agent. Activated tough agent refers to the active group that contains the substrate resin reaction on its molecular chain. It can form a network structure and increase some flexible chain to improveThe impact performance of composite materials.Non -active tough agent is a category that is well dissolved with the substrate resin, but does not participate in chemical reactions.
Rena recipe
Diabenate is the main body of tough agent, and its output accounts for about 80%of the total output of the plasticizer. Among them, the dystersicate (DOP) of phthalate (DOP) is the most important variety.The smaller plasticizers in the production scale are: esters of hexylic acid and reticulinic acid (with good cold resistance), phosphate (with flame retardant effects), epoxy oil and epoxy (and thermal stabilizerThere are synergistic effects), polarized phenylxate and ductinol (better thermal resistance), chlorine paraffin (auxiliary plasticizer and flame retardant plasticizer), and alkyl sulfate (auxiliary tough tough agent).
Types of Rena
Rigid agent can be divided into rubber tough agent and thermoplastic elastic body.(1) Rubber type 1. Copylasm rubber (EPR) ethylene rubber is a non -fixed rubber made of ethylene and acrylonne as the main single raw material, using organic metal catalysts, and convergence of co -concentrated in solution.According to whether the non -conjugate dizide is added as a unsaturated third monomer, ethylene rubber can be divided into two categories: binary cluster and ternary cluster.Beni rubber is basically a saturated polymer compound. There is no polar replacement base in the molecule, and the chain section is relatively soft.Its anti -oxygenity, weather resistance, and aging resistance are the best in general rubber. Its electrical insulation, chemical resistance and impact resistance are better.
Rigidist effect
The mixing of the tough agent and the plastic improves its impact strength, toughness, stretching strength, tortuousness, cold resistance, relief thermal expansion and contraction, and reducing costs without affecting the physical properties of the plastic itself.
What is a tough agent
Rigid agent generally contains activated groups, which can have a chemical reaction with resin. After curing, it is not completely compatible. Sometimes it is divided into phase.The anti -impact performance has improved significantly.Some low -molecular liquids or plasticizers are added to the resin. Although it can also reduce the brittleness, the rigidity, strength, and thermal deformation temperature decreased significantly, and the structural bonding requirements cannot be met.Rigid agent is completely different.

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