Preparation and performance testing of ester-soluble composite adhesive for environmentally friendly decorative panel on building wall
A ester-soluble composite adhesive for environmentally friendly decorative panel on building wall was prepared by thermal dissolution method using main materials such as polyurethane resin,acrylic monomer,combined with initiator(CHP),and accelerator(TMTU).Isophorone diisocyanate was selected as the curing agent,and the tensile shear strength,absolute viscosity,coating film properties,curing time,cross-sectional morphology,thermal stability,and other properties of the adhesive were tested under different preparation temperatures,mass amounts of initiator system,amounts of initiators,proportions of acrylic monomer/polyurethane resin,curing temperatures,and curing agent contents.The research results showed that,(1)The preparation temperature was between 45-55℃,and the preparation effect of the adhesive was relatively good.When choosing the initiation system composed of CHP-TMTU,the tensile shear strength of the adhesive could reach 6.48 MPa when w(CHP)=5%and w(TMTU)=4%.(2)The amount of initiator had a significant impact on the absolute viscosity of the adhesive.Increasing the amount of initiator appropriately could improve the polymerization reaction rate and solid content,thereby increasing the viscosity of the adhesive.(3)The proportion of acrylic monomer/polyurethane resin had a significant impact on the performance of adhesive coating film.The introduction of acrylic monomer increased the crosslinking degree and hard segment content,thereby improving the hardness and impact resistance of the coating film.(4)The curing temperature and curing agent ratio had a significant impact on the curing time of the adhesive.After adding the curing agent,the adhesive had a more resilient cross-sectional characteristic,and the adhesive exhibited higher thermal stability under high temperature conditions.
building wallenvironmentally friendly decorative panelester solubleadhesivecuring agent
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