Basic brief introduction
Epoxy resin and itself of epoxy resin adhesive are avirulent, but because solvent and other toxicant were added in preparation process, because this is not little epoxy resin “ is poisonous ” , course of study of domestic epoxy resin is passing modified of ability in swimming, avoid to add wait for a way, maintain instinctive quality of avirulent ” of epoxy resin “ . Epoxy resin is used at the same time with accretion commonly, in order to obtain applied value. Accretion can try to choose by different utility, commonly used accretion has the following kinds:
(1) solidify agent;
(2) modifier;
(3) filling;
(4) thinner;
(5) other.
Among them solidify agent is indispensable accretion, no matter be to make,stick receive agent, coating, pouring makings need to add solidify agent, otherwise epoxy resin cannot solidify. Because utility function asks each are not identical, also have diverse demand to the accretion such as epoxy resin and solidify agent, modifier, filling, thinner.
The choice of solidify agent
1. Solidify agent is phyletic:
Epoxy resin raw material
2. The dosage of solidify agent
(1) when amine makes cross-linking lotion, press type calculates:
Amine dosage =MG/Hn, in type: M= amine element is measured; Hn= contains lively hydrogen number;
G= annulus oxygen is worth (the annulus oxygen equivalent that every 100 grams contain in epoxy resin is counted)
(2) with acid anhydride kind when press type calculates:
Acid anhydride dosage =MG (0.6~1) / in 100 type: Element of M= acid anhydride is measured;
G= annulus oxygen is worth (0.6~1) for experimental coefficient
3. Choose the principle of solidify agent: Solidify dose is larger to the function influence of epoxy resin, press when the row chooses commonly.
(1) choose from safety: General requirement noxiousness is small had better, facilitating safe production.
(2) choose from cost.
The choice of modifier
(1) get together sulfur balata: Can rise impact strength and fight pare function.
(2) polyamide colophony: Ameliorable brittleness, rise stick receive ability.
(3) polyvinyl alcohol shrinks fourth aldehyde: Rise fight concussion tan sex.
(4) fourth nitrile balata kind: Rise fight concussion tan sex.
(5) phenolic aldehyde colophony kind: Ameliorable be able to bear or endure lukewarm reach corrosion resistance can.
(6) polyester colophony: Rise fight concussion tan sex.
(7) uric aldehyde 3 get together cyanogen amine colophony: Increase combat chemical function and strength.
(8) furfural colophony: Improve static curve function, improve acid-proof performance.
(9) vinyl: Rise fight pare the gender is mixed combat strong strength.
(10) ester of different cyanic acid: Reduce humidity osmotic and increase water-resisting property.
(11) silicone: Increase hear resistance.
The choice of filling
Filling name | Action |
Asbestos fiber, fibre glass | Increase tenacity, impact resistance |
Quartz pink, porcelain pink, iron pink, Cement, corundum | Raise hardness |
Pink of alumina, porcelain | Increase stick relay, increase mechanical strength |
Cement of asbestine pink, silica gel pink, high temperature | Increase hear resistance |
Pink of asbestine pink, quartz, stone pink | Reduce shrinkage |
Pink of aluminium powder, copper, iron pink Wait for metallic powder | Increase heat conduction, conductivity |
Pink of black lead pink, French chalk, quartz | Raise anti-wear properties to be able to reach lubricant function |
Corundum reachs other abrasive | Raise anti-wear properties can |
Pink of micaceous pink, porcelain pink, quartz | Increase insulation property |
All sorts of dye, black lead | Have color |
The choice of thinner
Thinner of annulus oxygen active
The 10 thousand W-7400 of AGE, BGE, Guangzhou that Hua Xincai expects, 692, 501 etc
Thinner adds scale is 8-15%; commonly
Inert thinner
Xylene, toluene, benzene, acetone is waited a moment
