论文信息 - Study on Thermal and Mechanical Properties of Polyurethane Systems for In-Mould Decoration Ink

Study on Thermal and Mechanical Properties of Polyurethane Systems for In-Mould Decoration Ink

In this study, three polyurethane systems A (A450/RD181/L75), B(A450/RD181/N3390) and C(A450/RD181/2104/N3390) for in-mould decoration ink were studied. The results of thermogravimetric analysis showed that introducing rosin modified phenolic resin 2104 (RMPR) and N3390 into PU system A can improve the thermal stability, Moreover, Measurements of gel fraction and swell ratio showed that incorporation of N3390 is benificial for increasing the cross-linking density of PU systems as compared to L75 so as to increase the gel fraction and decrease the swell ratio.The tensile strength of cured PU systems increased following in the order: A<B<C, elongation at break is just the opposite. In addition, it is indicated that incorporation of N3390 is benificial for increasing the cross-linking density of PUs so as to improve the the shore A hardness and decease the water sorption.

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