Study on Preparation and Properties of Polyurethaned Acrylamide Modified Aldehyde-Ketone Resins
In this paper,acrylamide was co-reacted with cyclohexanone and formaldehyde to prepare aldehyde-ketone resins with high hydroxyl value.The effects of aldehyde-ketone ratio and acrylamide amount on the hydroxyl value and viscosity of the prepared aldehyde-ketone resins were studied.The acrylamide-modified aldehyde-ketone resin was further reacted with isophorone diisocyanate,and then dispersed in water to prepare polyurethane emulsion.After being stained by the prepared emulsion,the dyeing effect,friction resistance and soap-washing resistance of the cotton fabrics were investigated.The results show that the hydroxyl value of the acrylamide modified aldehyde-ketone resins was enhanced effectively,compared to that of the aldehyde-ketone resin without acrylamide.Besides,the hydroxyl content of acrylamide-modified aldehyde-ketone resin could be increased by increasing the formaldehyde content properly.The chF-AM-resin-6 aldehyde-ketone resin,whose reactant molar ratio is n(acrylamide)∶n(formaldehyde)∶n(cyclohexanone)=0.05∶1.60∶1,showed a maximum hydroxyl value(up to 375 mg KOH/g),244%higher than that of the aldehyde-ketone resin without acrylamide.In addition,the samples dyed with 15%chF-AM-resin-6-PU emulsion exhibited the best dyeing effect(42.7%increase of K/S value)and soap-washing resistance(increased from 3 to 4),compared with the control sample.
Aldehyde-ketone resinWater-based inkPolyurethaneHigh hydroxyl value
国家科技期刊平台
NSTL
万方数据
