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Anti-flammability epoxy resin

From;  Author:Stand originally

Epoxy resin is combustible, catch fire very easily. General-purpose epoxy resin and fat the oxygen index of epoxy resin is annulus a group of things with common features about 19.8% , belong to combustible material, to raise the anti-flammability of epoxy resin, be like anti-flammability element normally haloid, phosphor, nitrogen, boracic, antimonial, aluminium in introducing epoxy resin condensate in order to obtain anti-flammability. Make take epoxy resin flame retardant systematic method is very much, substantially classifies 1-46 seeing a table.

Watch 1-46 is made take epoxy resin flame retardant the classification of systematic method

Introduce flame retardant elemental means

Flame retardant constituent

Flame retardant systematic property

Add model

Add model

Add model

Synthesis

Blame is active organic with inorganic fire retardant

Active fire retardant (dilute and additive)

Flame retardant model solidify agent

Anti-flammability epoxy resin

Mix in all model (physics)

Reaction (chemistry)

Reaction (chemistry)

Reaction (chemistry)

Use add means operation to go to the lavatory. Fire retardant and flame retardant model the sort that solidify reachs is more, what the recipe designs is alternative with flexibility bigger, the breed that synthesizes anti-flammability epoxy resin is opposite less, manufacturing technology is more sophisticated. Mix in all model flame retardant in the system flame retardant constituent is it is dispersedly with physical condition in epoxy resin, need dosage to amount to, can make the function of condensate drops, but the value is inferior. Reaction flame retardant in the system flame retardant the element combines solidify resinous macromolecule finally in catenary, consequently flame retardant stability is good, disappear not easily, lesser to the other property influence of condensate. In actual application middling is used center means and use, often can produce synergism and achieve optimal result.

This section will introduce anti-flammability epoxy resin only. Anti-flammability epoxy resin is to use contain flame retardant elemental monomer (wait like 4 bromic double phenolic A) synthesize and get. The anti-flammability epoxy resin of industrialized a few days ago production basically is the epoxy resin that contain bromine (bromine changes epoxy resin) . Apply with 4 bromic double phenolic A epoxy resin among them the widest.

One, the epoxy resin that contain bromine

Haloid element fluorine, chloric, bromic, iodine has anti-flammability, its are drawn and be F>CL>Br>I without the rat beard of stability. The stability of iodide is the poorest, encounter heat to be decomposed extremely easily, not practical, the affinity of fluoride is the biggest, decompose hard piece have flame retardant the fluorine of action changes hydrogen, and the noxiousness of small element fluoride that splitting decomposition gives is very big, reason also is restricted actually with the gender. Chloric with bromine not only flame retardant the effect is good, and raw material origin is wide, easy, the price is low, application is the so widest, but what contain chloric epoxy resin to use actually is not much also, use most is the epoxy resin that contains bromine, the key that its reason is C-Br key can (284.5KJ/MOL) the key that is less than C-CL key can (338.6kj/mol) , HBr captures the capability of freedom radical is stronger than HCL. So of bromide flame retardant efficiency is taller than chloride. In addition, 4 bromine are contained in epoxy resin of 48% haloid, and contain only in 4 chloric epoxy resin of 30% haloid. What should make colophony presents effective anti-flammability to must have 26%~30% is chloric. And the bromine that needs 13%~15% only. Bromine changes recipe of system of epoxy resin solidify in can mix with more other colophony mix into, protecting hold effect anti-flammability while, can acquire bigger flexible or other property.