Non-toxic environmentally friendly crosslinking agent TAIC

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Application of TAIC 1387594291 A.Crosslinking Coagent ALVINCHENYAN@YAHOO.COM TAIC® is widely used as a coagent for peroxide crosslinking or radiation crosslinking of Chlorinated Polyethylene (CPE), EPDM, Fluroelaster and so on. 1) Polyolefines TAIC® is availavle for linking by x-ray, y-ray electron or ultra violet ray radiation and the product polyolefines have the superior insolubility to solvents and the tensile strength at high temperature could be improved. 2) Chlorinated Polyethylene (CPE) TAIC® is effective modifier to heat resistance with increasing of crosslinking density for peroxide crosslinking denisty for peroxide crosslinking of CPE. Since TAIC® acts as an acceptor of HCI which is envolved from CPE at crosslinking reaction and deterioriates its physical properties. Table 2 is an example of crosslinking of CPE using TAIC® 3) Ethylene Vinyl Acetate Copolymer (EVA) TAIC® is the most effecdtive coagent for crosslinking EVA. The effectivness of crosslinking coagent which acts in peroxide crosslinking of EVA is as follows; TAIC® = TAC > DVB => TMPTMA = DAP = EGDM > NON TAIC®: Triallyl isocyanurate TAC: Triallyl cyanurate DVB: Divinyl Benzen TMPTMA: Trimethylolpropane trimethacrylate DAP: Diallyl phthalate EGDM: Ethyleneglycol dimethacrylate NON: None of crosslinking coagent And Fig. 7 shows the relation of Tensile strentgth vs Elongation of crosslinked EVA using some crosslinking coagent. 4) EPDM EPDM is being widely utilized for industrial use based on its excellent properties on heat resistance and weathering. In application field being required severe physical properties, peroxide crosslinking in employed. TAIC® preferably contributes to promote crosslinking rate and also to improve its heat resistance, compression set and abrasion resistance. 5) Fluoroelastomer TAIC® is necessarily used for crosslinking reaction of Fluoroelastomer. TAIC® is employed often for radiation crosslinking coagent for specified application field of high quality insulating material. Table 3 is an example of crosslinking of Fluoroelastomer using TAIC®. 6) Urethane Rubber TAIC® is effective to improve of crosslink density in the vulcanization of millable type polyurethane. B. Polymerization Comonomer The copolymerization of bi-functional monomer with TAIC® provides a copolymer crosslinkable by pendant allyl groups in TAIC® unit. Copolymer having higher concentration of TAIC® unit, provide a thermosetting characteristic. The copolymerization will result the improved properties of resistance to heat and weathering and mechanical strength. 1) Emulsion Copolymerization In emulsion copolymerization of acrylic ester with TAIC®provides an unique copolymer which has much improved properties including heat, weathering and inmpact resistance and it is used as a raw material of acrylic paint and also used as a component for acrylic graft copolymer. TAIC® can also improve properties of copolymer which is made by emulsion copolymerization with styrene or acrylonitrile 2) Copolymerization with Thermosetting Polymer In addition of TAIC® in unsaturated polyester of fiallyl phthalate prepolymer, heat resistance, hydrolysis resistance and mechanical strength are much improved. Fig. 8 shows the Heat Deflection Temperature (HDT) of copolymer provided by copolymerization of diallyl phtalate prepolymer and TAIC®. 3) Photopolymerization TAIC® can rapidly react with poly-thiol compounds by ultraviolet light to provide tightly crosslinked polymeric system. TAIC® can be participated in the photopolymerization of epoxy acrylates. ALVINCHENYAN@YAHOO.COM

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Liuyang Sanji Chemical Trade Co., Ltd

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