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Low smoke and low halogen flame-retardant PVC Cable Compound for Development of pre-branch

Son of the HC1 removal from catalyst. In the resulting MC1. The removal under the influence of HC1, led the formation of trans-Polyenes by cyclization to the role of sub, resulting in the residual carbon, thus reducing the release of smoke. At the same time, some of HC1 released into the gas phase and the formation of MClz, by capturing free radicals play a role in termination of chain combustion. Sample d in Table 1 compared with the description of the sample f, excessive ATH decomposed into Al. O. To accelerate the de-ionization of the polymer HC1,[link widoczny dla zalogowanych], and accelerate the charring, resulting in a sharp increase in HC1 concentration, smoke density increases. Table 1 Resistance of traditional PVC PVO fuel resistance and low smoke and low halogen flame retardant smoke reduced fuel halogen additive dosage comparison sample number / quality of CaCO3 mixture of antimony oxide were ATH oxygen index,% smoke density (no flame) smoke rate oAHcl release / (mg �� g a) Typical sample [2] bdf600338306233O4449618.24 Note: PVC100 copies, D () P4O copies. Compound lead salt stabilizer 8 copies. 2.2 solid solution lATH PVG performance on the performance of the various samples are listed in Table 2. Table 2 The results show that the amount of the ATH 2O were kept unchanged,[link widoczny dla zalogowanych], the solid solution to add capacity from 1 to 3 phr, the oxygen index of samples from 32.9 to 36.0; 200 �� thermal stability of time from 65min down 3Orain, that the introduction of solid solution composition as a smoke suppressant, so that the thermal stability of PVC compounds was significantly decreased (can not meet the conventional processing on the thermal stability requirements.) If the amount of solid solution for 3 copies of the same, the sample of ATH were increased to 4O 2O copies by the oxygen index rose to 38.6 from the 36.0. Increase the amount of ATH had no effect on the thermal stability, but the increase in the amount of ATH, and damaged the mechanical properties and electrical properties (see Table 2). O71O26O �� Hong oo plus OOOO �� 14 �� Modern Plastics Processing and Application February 2006 Note: PVC100 copies, DOP40 copies, lead salt composite stabilizer 8 copies. Rheological properties of DOP40 were 2.3, lead salt composite stabilizer Super

melting characteristics in table 3 compound is the ATH content on PVC (PVC100 copies of the parameters of Table 3. 2O2037401.02.41 rheological properties of samples .31.26.97.17.07.31. O21.450.571.09 Table 3 shows, by adding the same amount in the ATH, PVC composites increased with the amount of solid solution, melting time increases, the equilibrium torque increased, and the other On the one hand, the solid solution by adding the same amount, PVC compounds the amount of the maximum torque increases with the ATH and continuous increase, indicating that the higher dosage of ATH, PVC compound processing becomes worse. 2.4 The amount of plasticizer and type of other properties of Table 4 is the amount and type of plasticizer on the PVC in the HC1 emission, thermal stability. Table 4, the amount and type of plasticizer on the release and thermal stability of HCI Note: ATH amount of 28 copies, lead salt stabilizer 8 copies of the summer together, PVC amount of 100. Table 4, i epoxidized soybean oil were used instead of 5 h in 5 copies of DOP, HC1 time of release,[link widoczny dla zalogowanych], and little change in thermal stability; in j in Add 5 copies of epoxy soybean oil, from the HC1 emission, thermal stability time point of view, the effect is more apparent. because the structure of epoxy soybean oil epoxy and epoxidized soybean oil can improve the compatibility between PVC molecules, so that the distance between polymer chains increases, the interaction decreased; the same time it Youyi bond epoxy to stabilize the active form of chlorine atoms absorb thermal decomposition of HC1, stop the chain reaction off HC1. in the formula by adding epoxidized soybean oil or partially replace the DOP plasticizer, cable to meet the other physical and mechanical properties of the premise, corresponding increase in the thermal stability and reduce the HC1 emission,[link widoczny dla zalogowanych], thereby reducing the toxic, corrosive. 3 Conclusion a) solid solution is an effective flame retardant of plasticized PVC smoke additives, where the presence of antimony oxide, solid solution and ATH obvious synergies, and solid solution with CaCO. No synergistic effect. b) significantly affect the amount of solid solution decomposition temperature of PVC, and ATH will add increased processing difficulties, and the damage to PVC composite mechanical properties, electrical properties. Taking into account the overall performance of materials in the smoke and low halogen destroy the formula recommended by 2 solid solutions were, ATH20 were appropriate. c) epoxidized soybean oil and DoP match and improve the stability of PVC cable material, inhibiting the release of HC1.
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