high alumina ceramic coatings
dispersity for various materials,The abrasion resistant coating based its preparation has good invasion,
the coatings have very high mechanical strength,and wear resistance,water resistance and corrosion resistant ability is good too.
But the crosslinking density of ordinary epoxy resin after curing is high,the internal stress is large,the cured product deformation
ability is poor,not fatigue resistant and impact resistant.Xiangyang City Hundred Shield Coating Material Co.,Ltd thinks that it
can improve the wear resistance of epoxy abrasion resistant coating by the following ways
Xiangyang City Hundred Shield Coating Material Co.,Ltd used epoxy matrix is the passed polyurethane modified matrix.
because the surface area of nano alumina is very big,it can adsorb more molecular chains,make the stress distribution be
more uniform,reduce the friction stress of local area,with less abrasion.High surface energy of nanometer alumina powder
can be embedded in resin cured product,and form a stereoscopic 3d mesh structure,its “prick nail” effect has a great contribute
to the wear resistance and bonding strength of abrasion resistant coatings.
studying suggests: for the epoxy modified abrasion resistant coatings,there are mainly two kinds of abrasion forms for the
filling particle material,namely grainy brittleness broken and overall peeling off.Brittleness broken usually occurs in particles sharp
corners and weak edges,when the filling material is spherical,the wear resistant performance of the coatings is higher,
when the filling material is the amorphous materials,the abrasion resistant performance of the coatings is a bit poor.
Particle overall spalling is due to the material surface appears the selective abrasion in the process of abrasion,
basic material is grinding off,the filling particles are gradually prominent,when the contact area of particles and substrates is
as small as the bonding strength can’t resist the impact force of the abrasive material,the filling particle will fall off.
make the bonding strength of substrates and filling particle material increase further.The filling abrasion resistant particle
material passed the strict grading calculation,the coatings get the best filling density,and as the used substrate is passed
modification of polyurethane,epoxy resin and polyurethane form the interpenetrating network structure,can effectively
absorb and transfer the jet flow impact pressure produced by the bubbles collapse and fatigue rupture produced by
abrasive particle repeated impact.Therefore,BD706 abrasion resistant coating has higher shear strength,peel strength and
wear resistant,cavitation resistant capability.
Xiangyang Hundred Shield Coating Material Co.,Ltd is in the process of actual use,found that the addition quantity of
BD706 wear resistant coatings curing agent has a certain influence on the abrasion resistance of the coatings.
Too little amount of curing agent is added,abrasion resistant coating can’t play their deserved strength,too much curing agent
will make the coatings be brittle,shear strength is reduced.Generally the addition quantity of curing agent had better be
slightly larger than the theoretical addition quantity,the BD706 wear resistant coating theoretical mass ratio is A: B = 4:1.