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Research papers based on the fabric stiffening agent , a large number of experiments and research work , based on the principle of molecular design , process optimization , adjust the formula , prepared acrylic emulsion with core-shell structure and has a good mixed performance modified The PVAc emulsion and applied to the fabric stiffening . Multiple test such as DSC, FTIR characterization methods , analysis and discussion of the comonomer , protective colloid , initiator , emulsifying agents, reaction temperature and time , the functional monomer and other factors on the properties of emulsion . The main results show that : (1) semi-continuous synthesis of pre-emulsified seed of a soft -core hard shell acrylic emulsion product has excellent finishing performance . Preferred synthesis conditions are : N - methylol acrylamide and acrylic acid mass ratio of 3:4 , the SDS and OP-10 compound emulsifier used in an amount of 4.0% of the total mass of the monomer , initiator amount to the total mass of the monomers 0.5 %, double the dropping temperature of 80 ℃, time 90min, additional initiator warming 3 ~ 5 ℃, insulation 60min . (2) using a butyl acrylate -modified polyvinyl acetate emulsion , two different initiator system (i.e., ammonium persulfate system , ammonium persulfate - sodium bicarbonate system) of PVAc emulsion polymerization reaction . Selection of non-ionic emulsifier OP-10, prepared by a modified vinyl acetate emulsion with good mixed performance . Elect the best experimental program : monomer mass ratio m (VAc): m (BA) for 9:1 , the protective colloid m (PVA -1788 ) : m (PVA - 1799 ) of 1:1 , the total 6.0% ( on monomer ) , the OP -10 used in an amount of 2.0 % SDS used in an amount of 0.1% , the thermal initiator is the APS , the amount of 0.4% ( on monomer ) , the redox initiator system APS/NaHSO3, were used in an amount of 0.4% , 0.04 % (on monomer). ( 3 ) the best finishing process : the polymer dosage 20g / L , padding finishing liquid temperature of 30 ° C to 120 ° C curing 3min, fabric stiffness improved significantly , and has a thick , smooth effect .
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