低温固化环氧粉末涂料与mdf粉末静电喷涂工艺-研究

《低温固化环氧粉末涂料与mdf粉末静电喷涂工艺-研究》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、万方数据ABSTRACTThethermosettingpolymerpowderscoatingisundergoingrapidgrowthasallecological，economicandenergyefficienttechnology．PowdercoatingspossessadvantagesoverconventionalcoatingsinthatnOpollutingsolventlossoccursonapplication，flammabilityandtoxicityaresubstantial

2、lyreduced，owingtotheuseofelectrostaticspray，littlematerialislostand，whatismore，duringbaking，energyconsumptioncanbereducedcomparedtosolvent-borneorwater—bornecoatings．Inthispaper，twokindsofepoxypowdercoatingswerepreparedbymeltingblendingofphenolicresin／alkalineaccel

3、eratorandmicronizeddicyandiarnide(Dicy)／2-methylimidazole(2-MI)ascuringsystems．Thefactorsthataffectthecuringreactionandmechanicalpropertiesofepoxypowdercoatingswereinvestigated，suchasamountofcuringagentandaccelerator．Then，thecuringreactionandcuringkineticsofthistwo

4、differentsystemswereinvestigatedbynon-isothermaldifferentialscanningcalorimetry(DSC)，andthecuringprocessWasdeduced．Atlast，theoptimumamountofthecuringsystemsandtheircuringconditionsweredetermined．Inaddition，theeffectofthetechnologicalparametersofelectrostaticsprayin

5、gformediumdensityfiberboard(MDF)ontheone-passtransferefficiencyofpowderwerediscussedbyresponsesurfaceanalysisandtheinfluencefactorsofcoatingflattingpropertywerestudiedpreliminarily．Theexperimentshowedthatfortheepoxy-phenolssystemtheoptimumamountsofphenolsandalkalin

6、eacceleratorwererespectively10％and1．0％．Forthissystemthebestcuringconditionswerecuring30minutesat120degreescentigrade．Andthecuredlayershadgoodmechanicalproperties．Withregardtotheepoxy—Dicysystem，theoptimumamountSofDicyand2-M1wererespectively2．5％andO．25％anditshouldbe

7、cured30minutesat130degreescentigrade．Asecondorderpolynomialempiricalmodelsoftheone-passtransferefficiencyofpowderwiththetechnologicalparametersofelectrostaticsprayingwassetupbyusingBox—Behnkenexperimentaldesigncombinedwithresponsesurfaceanalysis．Theeffectoftechnolo

8、gicalparametersontheone-passtransferefficiencyandtheirinteractionwerediscussed．Andtheoptimaltechnologicalparametersweredetermined．Withthespraying