Stock code：300019
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Usage and dosage of coupling agent
1、Usage 1.Pretreatmentofpigmentsandfillers Althoughitisdifficulttocoattitanatecouplingagentonthesurfaceofpigmentsandfillersinadvance,thetreatmenteffectisbetter.Dissolvethecouplingagentinasmallamountoftoluene,xyleneandotherbenzenesolvents,addhumanpigmentsandfillers,andproperlyheatuptoabout100℃underhigh-speedstirring(about1000r/min),stirforabout0.5h,sothateachpigmentandfillersparticlescanbecoatedwithalayerofcouplingagent.Aftercoatingwithcouplingagent,thepigmentandfillercanbeusedtomakecoating. 2.Directadditionmethod Intheprocessofpaintmaking,couplingagentisdirectlyaddedbeforehigh-speedlaxity.Usesolventgasoline,xyleneandothersolventstodissolvetheweighedcouplingagent,disperseitintotheorganicbasematerial,participateinthehigh-speeddispersionofpigmentsandfillers,andthenmakethecoatingaccordingtotheusualmethod.Thewater-solublecouplingagentisusedforthewater-basedcoating,andthetreatmentmethodisasdescribedabove,withwaterasthesolvent. 2、Dosage Theoretically,theamountofcouplingagentistomakeallhydrophilicreactiongroupsinthecouplingagentreactwiththehydroxylorprotonsuppliedbythepigmentsandfillers.Thereisnoneedtoexcess,butinfact,themostappropriateamountshouldbedeterminedaccordingtotheparticlesizeofthepigmentsandfillersandthesituationofthesurfacefunctionalgroups.Therelationshipbetweenviscosityandamountofcouplingagentcanbeobtainedbyviscositymeasurement.Themostsuitableamountoftitanateisthebiggestpointofviscositydecrease.Accordingtotheexperience,theamountofcouplingagentshouldbe1%-2%oftheamountofsolidpigmentsandfillersinthecoating.Thefinertheparticlesizeofpigmentsandfillers,thelargerthesurfacedeposit,andthemorecouplingagentsareused. Inconclusion,titanatecouplingagentswithdifferentgroupscanbeplannedaccordingtotheneedsofthecoatingindustry,sothattheycanbecomespecificormultifunctionalauxiliaries, Author:silanecouplingagentsource:www.gbxfsilicones.com
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