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Petroleum resin blends

author£ºadmin Date£º2017/1/3 17:23:26

Hot-melt pressure-sensitive adhesive (HMPSA) commonly used tackifying resins are rosin resin, terpene resin and petroleum resin. The compatibility of the tackifying resin with the thermoplastic elastomer SBS (styrene /butadiene /ethylene block copolymer) is somewhat different.

The relationship between the structural difference and the performance of the tackifying resin was studied and compared, and its general rule was explored. The results show that when the softening point of the tackifying resin is 100 ~ 110 ¡æ, the corresponding HMPSA can obtain lower melt viscosity and higher peel strength. When the softening point of the tackifying resin is 100 ¡æ, the peel strength is in the order of terpene resin HMPSA> rosin resin HMPSA> petroleum resin HMPSA. When w (tackifying resin) = 210% (relative to the elastomer SBS), the overall performance of petroleum resin containing HMPSA worse than rosin resin (or terpene resin containing) HMPSA; ¡Ý 210%, HMPSA melt viscosity below 10 000 mPa ¡¤ S, but holding viscosity increased.

The dynamic mechanical properties of SBS (polarized SBS or SBSVP) thermoplastic elastomer blends with C5 petroleum resin blends were investigated by dynamic mechanical analysis (DMA), which was used to characterize SBSVP and C5 petroleum resin compatibility. The results show that there is only one obvious single peak on the change of the loss factor and temperature of C5 petroleum resin and SBSVP blend. The position of C5 petroleum resin and SBSVP blends tend to the peak corresponding to PB of SBSVP and the peak corresponding to PS phase is very small, The petroleum resin has good compatibility with the PB phase in SBSVP, and most C5 petroleum resins are compatible with PB.

MAH grafted C5 petroleum resin (C5-g-MAH), the introduction of polar groups in its molecular structure, is conducive to improving the compatibility of petroleum resin and other polar polymers, the expansion of petroleum resin use. C5-g-MAH was prepared by melt method. The effects of dicumyl peroxide (DCP), maleic anhydride (MAH) and the third component (C5-g-MAH) on the grafting of maleic anhydride (Crosslinker) on the grafting of C5-g-MAH. The results showed that the grafting rate of DCP was 1.28% when MAH content was 4 phr. The grafting rate of C5-g-MAH in the third component was: Cashew nut shell oil> triallyl isocyanurate (TAIC)> 1,2-polybutadiene 1, 2-PBd) were all higher than those of the blank. FT-IR analysis confirmed the grafting reaction of MAH melt grafted C5 petroleum resin.

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