Epoxy resins and epoxy resin adhesives are non-toxic, but due to the addition of solvents and other toxic substances during the preparation process, many epoxy resins are "toxic". The domestic epoxy resin industry is adopting water-based modification to avoid adding, etc. Way to maintain the "non-toxic" nature of epoxy resin. Epoxy resin is generally used together with additives to obtain application value. Additives can be selected according to different purposes. Common Laser Cutting Ceramics additives include the following categories: (1) curing agent; (2) modifier; (3) filler; (4) diluent; (5) others. Among them, the curing agent is an indispensable additive. Whether it is used as an adhesive, coating, or castable, it must be added with a curing agent, otherwise the epoxy resin cannot be cured. Due to the different performance requirements of applications, there are also different requirements for additives such as epoxy resin and curing agents, modifiers, fillers, and diluents. Choice of curing agent
1. Curing agent type:
Epoxy raw materials
2. The amount of curing agent
(1) When amines are used as cross-linking agents, the following formula is calculated:
Amine dosage = MG/Hn, where: M = amine molecular weight; Hn = number of active hydrogens; G = epoxy value (the number of epoxy equivalents per 100 grams of epoxy resin)
(2) When using acid anhydrides, it is calculated by the following formula:
Dosage of acid anhydride = MG (0.6~1)/100 where: M = molecular weight of acid anhydride; G = epoxy value (0.6~1) is the experimental coefficient
3. The principle of choosing Laser Cutting Ceramics the curing agent: The curing agent has a great influence on the performance of epoxy resin, generally according to the following points.
(1) Choose from the perspective of safety: Generally, it is better to have low toxicity, which is convenient for safe production.
(2) Choose from cost.
Choice of modifier
(1) Polysulfide rubber: can improve impact strength Laser Cutting Ceramics and anti-stripping performance.
(2) Polyamide resin: It can improve brittleness and improve bonding ability.
(3) Polyvinyl butyral: improve impact tanning resistance.
(4) Nitrile rubber: improve impact tanning resistance.
(5) Phenolic resins: can improve temperature resistance and corrosion resistance.
(6) Polyester resin: improve impact tanning resistance.
(7) Urine aldehyde melamine resin: increase chemical resistance and strength.
(8) Furfural resin: improve static bending performance and increase 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.
Can precision ceramics be glued with epoxy resin?
2021 11/25