{"id":245140,"date":"2024-05-27T09:51:24","date_gmt":"2024-05-27T09:51:24","guid":{"rendered":"https:\/\/bruciteplus.cn\/en\/?p=245140"},"modified":"2024-07-01T11:35:22","modified_gmt":"2024-07-01T11:35:22","slug":"surface-treatment-of-natural-magnesium-hydroxide-influence-on-properties-of-hffr-cable-compounds","status":"publish","type":"post","link":"https:\/\/bruciteplus.cn\/en\/surface-treatment-of-natural-magnesium-hydroxide-influence-on-properties-of-hffr-cable-compounds\/","title":{"rendered":"Surface treatment of natural magnesium hydroxide Influence on properties of HFFR cable compounds"},"content":{"rendered":"

[et_pb_section fb_built=”1″ _builder_version=”4.25.1″ _module_preset=”default” background_color=”rgba(44,44,44,0.34)” background_image=”https:\/\/bruciteplus.cn\/en\/wp-content\/uploads\/sites\/4\/2024\/05\/ecopiren_cables-2.webp” background_blend=”overlay” z_index=”1000″ height=”34.38rem” overflow-y=”visible” custom_margin=”||-11px|||” scroll_vertical_motion=”5|50|50|100|0|4.5|-4.5″ scroll_fade=”0|85|85|100|100%|100|0%” motion_trigger_start=”bottom” locked=”off” global_colors_info=”{}”][et_pb_row custom_padding_last_edited=”on|phone” _builder_version=”4.25.2″ _module_preset=”default” custom_margin_tablet=”” custom_margin_phone=”10%||||false|false” custom_margin_last_edited=”on|phone” custom_padding=”199px|||||” custom_padding_tablet=”199px|||||” custom_padding_phone=”0px||||false|false” locked=”off” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.16″ _module_preset=”default” global_colors_info=”{}”][et_pb_text _builder_version=”4.25.1″ _dynamic_attributes=”content” _module_preset=”default” text_font=”|700|||||||” text_text_color=”#FFFFFF” text_font_size=”35px” text_line_height=”1.3em” header_font=”|700|||||||” header_text_color=”#FFFFFF” header_font_size=”50px” text_font_size_tablet=”35px” text_font_size_phone=”25px” text_font_size_last_edited=”on|phone” global_colors_info=”{}”]@ET-DC@eyJkeW5hbWljIjp0cnVlLCJjb250ZW50IjoicG9zdF90aXRsZSIsInNldHRpbmdzIjp7ImJlZm9yZSI6IiIsImFmdGVyIjoiIiwiZW5hYmxlX2h0bWwiOiJvZmYifX0=@[\/et_pb_text][et_pb_text _builder_version=”4.25.1″ _dynamic_attributes=”content” _module_preset=”default” text_text_color=”#FFFFFF” text_font_size=”18px” global_colors_info=”{}”]@ET-DC@eyJkeW5hbWljIjp0cnVlLCJjb250ZW50IjoicG9zdF9kYXRlIiwic2V0dGluZ3MiOnsiYmVmb3JlIjoiIiwiYWZ0ZXIiOiIiLCJkYXRlX2Zvcm1hdCI6ImRlZmF1bHQiLCJjdXN0b21fZGF0ZV9mb3JtYXQiOiIiLCJlbmFibGVfaHRtbCI6Im9mZiJ9fQ==@[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=”1″ module_class=”lipad” _builder_version=”4.25.1″ _module_preset=”default” background_enable_color=”off” background_enable_image=”off” background_size=”initial” background_position=”top_right” z_index=”9999″ custom_margin_tablet=”” custom_margin_phone=”-160px||||false|false” custom_margin_last_edited=”on|phone” custom_padding=”1px||80px|||” background_last_edited=”on|desktop” background_enable_image_tablet=”off” locked=”off” global_colors_info=”{}”][et_pb_row use_custom_gutter=”on” make_equal=”on” _builder_version=”4.16″ _module_preset=”default” width=”70%” width_tablet=”” width_phone=”” width_last_edited=”on|phone” custom_margin=”80px|auto||auto||” custom_padding=”0px||12px|||” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.16″ _module_preset=”default” custom_css_main_element=”margin:auto;” global_colors_info=”{}”][et_pb_text _builder_version=”4.25.2″ _module_preset=”default” text_font=”||||||||” text_font_size=”18px” text_line_height=”1.6em” ol_text_color=”#28a8cf” ol_line_height=”1.5em” header_3_font=”|700|||||||” header_3_font_size=”35px” header_3_line_height=”1.7em” width=”100%” width_tablet=”” width_phone=”100%” width_last_edited=”on|phone” module_alignment=”center” custom_padding=”||||false|true” global_colors_info=”{}”]<\/p>\n

Incorporating high amount of mineral filler into a thermoplastic polymer without compromising fluidity or mechanical properties of the final product is an eternal task of any compound manufacturer. This problem is especially of importance for manufacturers of HFFR cable compounds which are to combine high flame retardancy with smooth surface and nice elasticity. It is necessary to apply inorganic hydroxides (Al or Mg), particles of which are far from spherical shape and do not exactly promote elasticity. Moreover, any mineral filler contains some impurities, which cripple the ageing performance of the compound (the more filler there is \u2013 the stronger).<\/span><\/p>\n

 <\/p>\n

One way to solve described issues is to apply surface treated (or in other words surface coated) filler. Preliminary treating a mineral filler, especially of natural origin, with an organic agent allows to \u00abdeactivate\u00bb its surface \u2013 reduce moisture uptake, suppress interactions between impurities and polymer, improve filler-polymer compatibility and dispersion.<\/p>\n

The most widespread and popular surface treatment agents are stearic acid, its derivatives and organo-functional silanes. Stearic acid provides good compatibility along with low cost. On the other hand, silanes provide additional features depending on the functionality, in example ability crosslink along with the polymer. In general, abilities and features of such agents are known, therefore the goal of present work is to investigate potential advantages of different combinations of components.<\/p>\n

All agents were tested in a model formulation (Table 1), originally developed for synthetic ATH, replacing half of its quantity with natural magnesium hydroxide \u00abEcoPiren 3,5\u00bb with appropriate surface coating.<\/p>\n

[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=”4.25.2″ _module_preset=”default” width=”100%” max_width=”1200px” max_width_tablet=”95%” max_width_phone=”95%” max_width_last_edited=”on|phone” module_alignment=”center” custom_padding=”||0px|||” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.16″ _module_preset=”default” custom_css_main_element=”margin:auto;” global_colors_info=”{}”][et_pb_text _builder_version=”4.25.2″ _module_preset=”default” text_font_size=”18px” header_4_font=”|700|||||||” header_4_text_align=”center” header_4_font_size=”15px” header_4_line_height=”1.4em” text_orientation=”center” module_alignment=”center” overflow-x=”scroll” overflow-y=”hidden” custom_margin=”||||false|false” overflow-x_tablet=”scroll” overflow-x_phone=”scroll” overflow-x_last_edited=”on|desktop” global_colors_info=”{}”]<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n
Formulations<\/strong><\/td>\nRef. Compound<\/strong><\/td>\n<\/strong><\/td>\n<\/tr>\n
Ingredient<\/strong><\/td>\nTrade name<\/strong><\/td>\nphr<\/strong><\/td>\n<\/strong><\/td>\n<\/tr>\n<\/thead>\n
EVA28 MFI=3<\/td>\nEscorene UL00328<\/td>\n70<\/td>\n<\/td>\n<\/tr>\n
mLLDPE d=0,918 MFI=3,5<\/td>\nExceed 3518<\/td>\n20<\/td>\n<\/td>\n<\/tr>\n
LLDPE-g-MAH<\/td>\nFusabond E226<\/td>\n10<\/td>\n<\/td>\n<\/tr>\n
Silicon MB<\/td>\nSilmaprocess AL1142A<\/td>\n3<\/td>\n<\/td>\n<\/tr>\n
Stabilizer<\/td>\nSilmastab AE1527E<\/td>\n0.5<\/td>\n<\/td>\n<\/tr>\n
Fine precipitated ATH<\/td>\nApyral 40CD<\/td>\n160<\/td>\n<\/td>\n<\/tr>\n
Total<\/td>\n<\/td>\n263.5<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Table. 1 Model formulation of HFFR compound<\/strong><\/p>\n

[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row use_custom_gutter=”on” make_equal=”on” _builder_version=”4.25.2″ _module_preset=”default” width=”70%” custom_margin=”10px|auto||auto|false|false” custom_padding=”0px||1px|||” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.16″ _module_preset=”default” custom_css_main_element=”margin:auto;” global_colors_info=”{}”][et_pb_text _builder_version=”4.25.1″ _module_preset=”default” text_font=”||||||||” text_font_size=”18px” text_line_height=”1.6em” ol_text_color=”#28a8cf” ol_line_height=”1.5em” header_3_font=”|700|||||||” header_3_font_size=”35px” header_3_line_height=”1.7em” width=”100%” width_tablet=”” width_phone=”100%” width_last_edited=”on|phone” module_alignment=”center” custom_padding=”||||false|true” global_colors_info=”{}”]<\/p>\n

On the first stage the effect of changing the level of Stearic treatment was evaluated (Table 2). Surface treatment with Stearic acid allows to improve fluidity and elasticity of the compound 10-15%. Increasing level of treatment after 1% does not further improve mechanical properties.<\/p>\n

The effect of Stearic acid is definitely notable at 8-10% increased elongation compared to untreated grade, but it still doesn\u2019t allow to reach Reference properties. Therefore, on the next step combinations of agents were evaluated:<\/p>\n

    \n
  • \u00abDynasilan VTEO\u00bb<\/span><\/li>\n
  • \u00abDynasilan 6498\u00bb<\/span><\/li>\n
  • \u00abDynasilan GLYMO\u00bb<\/span><\/li>\n
  • \u00abDynasilan AMEO\u00bb<\/span><\/li>\n
  • \u00abPevalen\u00bb<\/span><\/li>\n
  • \u00abEsterex TM1111\u00bb<\/span><\/li>\n
  • \u00abTPSA\u00bb<\/span><\/li>\n<\/ul>\n

    Surface treatment was performed by preliminary homogenized mixtures of 1:1 ratio. The results are shown in Table 3.<\/p>\n

    All tested combinations showed higher Tensile Strength in comparison with Stearic acid. The mixture of TPSA and VTEO (FT40 and FT45) showed the best results. Its application increased the elongation at break 15-20% without the elongation at break 15-20% without significant loss of Tensile Strength.<\/p>\n

    Is it possible to obtain additional benefits using ternary mixtures? This was tested on the next step. Components were also premixed in ratio 1:1:1, immiscible combinations were skipped. The results are shown in Table 4.<\/p>\n

    No ternary mixture showed better results compared to binary one, though previous step best overall combination Pripol-VTEO-GLYMO performed roughly on the same level.<\/p>\n

    Thus it is possible to conclude that surface treatment provides a significant bonus to natural magnesium hydroxide performance and a possibility to introduce additional functionality. However, not every issue with natural mineral fillers can be solved by the surface treatment.<\/p>\n

    [\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=”4.25.2″ _module_preset=”default” width=”100%” max_width=”1200px” max_width_tablet=”95%” max_width_phone=”95%” max_width_last_edited=”on|phone” module_alignment=”center” custom_padding=”||0px|||” locked=”off” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.16″ _module_preset=”default” custom_css_main_element=”margin:auto;” global_colors_info=”{}”][et_pb_text _builder_version=”4.25.2″ _module_preset=”default” text_font_size=”18px” header_4_font=”|700|||||||” header_4_text_align=”center” header_4_font_size=”15px” header_4_line_height=”1.4em” text_orientation=”center” module_alignment=”center” overflow-x=”scroll” overflow-y=”hidden” custom_margin=”||||false|false” overflow-x_tablet=”scroll” overflow-x_phone=”scroll” overflow-x_last_edited=”on|desktop” global_colors_info=”{}”]<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
    Formulations<\/strong><\/td>\nRef. Cmpd<\/strong><\/td>\nFC 35<\/strong><\/td>\nFT 35<\/strong><\/td>\nFT 20<\/strong><\/td>\nFC 34<\/strong><\/td>\nFC 38<\/strong><\/td>\n<\/tr>\n
    Base Ecopiren<\/strong><\/td>\n\u2014<\/strong><\/td>\nEP3,5<\/strong><\/td>\nEP3,5<\/strong><\/td>\nEP3,5<\/strong><\/td>\nEP3,5<\/strong><\/td>\nEP3,5<\/strong><\/td>\n<\/tr>\n<\/thead>\n
    Coating<\/td>\n\u2014<\/td>\nNone<\/td>\nStearic acid<\/td>\nStearic acid<\/td>\nStearic acid<\/td>\nStearic acid<\/td>\n<\/tr>\n
    Treatment (%wt)<\/td>\n\u2014<\/td>\nNone<\/td>\n0.5<\/td>\n1.0<\/td>\n1.5<\/td>\n2.0<\/td>\n<\/tr>\n
    Properties<\/strong><\/td>\nApyral<\/strong><\/td>\nEP3,5<\/strong><\/td>\nEP3,5<\/strong><\/td>\nEP3,5<\/strong><\/td>\nEP3,5<\/strong><\/td>\nEP3,5<\/strong><\/td>\n<\/tr>\n
    Density at 23\u00b0C<\/td>\n1.497<\/td>\n1.496<\/td>\n1.489<\/td>\n1.481<\/td>\n1.485<\/td>\n1.500<\/td>\n<\/tr>\n
    MFI \u2013 21,6kg @ 190\u00b0C<\/td>\n13<\/td>\n4<\/td>\n5<\/td>\n6<\/td>\n7<\/td>\n12<\/td>\n<\/tr>\n
    LOI<\/td>\n36<\/td>\n34<\/td>\n34<\/td>\n34<\/td>\n34<\/td>\n34<\/td>\n<\/tr>\n
    Tensile Strength<\/td>\n13<\/td>\n13<\/td>\n12<\/td>\n11<\/td>\n9<\/td>\n8<\/td>\n<\/tr>\n
    Elongation at break<\/td>\n180<\/td>\n135<\/td>\n140<\/td>\n146<\/td>\n139<\/td>\n144<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    Table. 2 Stearic acid treatment level effect on compound properties<\/strong><\/p>\n

    [\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=”4.25.2″ _module_preset=”default” width=”99%” max_width=”1500px” max_width_tablet=”95%” max_width_phone=”95%” max_width_last_edited=”on|phone” module_alignment=”center” custom_padding=”||0px|||” module_alignment_tablet=”center” module_alignment_phone=”center” module_alignment_last_edited=”on|desktop” locked=”off” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.16″ _module_preset=”default” custom_css_main_element=”margin:auto;” global_colors_info=”{}”][et_pb_text _builder_version=”4.25.2″ _module_preset=”default” text_font_size=”18px” header_4_font=”|700|||||||” header_4_text_align=”center” header_4_font_size=”15px” header_4_line_height=”1.4em” text_orientation=”center” module_alignment=”center” overflow-x=”scroll” overflow-y=”hidden” custom_margin=”||||false|false” overflow-x_tablet=”scroll” overflow-x_phone=”scroll” overflow-x_last_edited=”on|desktop” global_colors_info=”{}”]<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n
    Formulations<\/strong><\/td>\nRef. Cmpd<\/strong><\/td>\nFT31<\/strong><\/td>\nFT32<\/strong><\/td>\nFT33<\/strong><\/td>\nFT34<\/strong><\/td>\nFT28<\/strong><\/td>\nFT30<\/strong><\/td>\nFT27<\/strong><\/td>\nFT29<\/strong><\/td>\nFT40<\/strong><\/td>\nFT45<\/strong><\/td>\n<\/tr>\n<\/thead>\n
    Treatment of Ecopiren (%wt)<\/td>\n\u2014<\/td>\n1.8<\/td>\n1.8<\/td>\n1.8<\/td>\n1.8<\/td>\n1.8<\/td>\n1.8<\/td>\n1.8<\/td>\n1.8<\/td>\n1.8<\/td>\n1.2<\/td>\n<\/tr>\n
    Component 1<\/td>\n\u2014<\/td>\nPevalen<\/td>\nPevalen<\/td>\nTM111<\/td>\nTM111<\/td>\nGLYMO<\/td>\nAMEO<\/td>\nPripol<\/td>\nPripol<\/td>\nTPSA<\/td>\nTPSA<\/td>\n<\/tr>\n
    Component 2<\/td>\n\u2014<\/td>\nVTEO<\/td>\n6498<\/td>\nVTEO<\/td>\n6498<\/td>\nVTEO<\/td>\nVTEO<\/td>\nGLYMO<\/td>\nVTEO<\/td>\nVTEO<\/td>\nVTEO<\/td>\n<\/tr>\n
    Properties<\/strong><\/td>\nApyral<\/strong><\/td>\nFT31<\/strong><\/td>\nFT32<\/strong><\/td>\nFT33<\/strong><\/td>\nFT34<\/strong><\/td>\nFT28<\/strong><\/td>\nFT30<\/strong><\/td>\nFT27<\/strong><\/td>\nFT29<\/strong><\/td>\nFT40<\/strong><\/td>\nFT45<\/strong><\/td>\n<\/tr>\n
    Density at 23\u00b0C<\/td>\n1.497<\/td>\n1.49<\/td>\n1.488<\/td>\n1.491<\/td>\n1.488<\/td>\n1.484<\/td>\n1.48<\/td>\n1.484<\/td>\n1.486<\/td>\n1.482<\/td>\n1.485<\/td>\n<\/tr>\n
    MFI \u2013 21,6kg @ 190\u00b0C<\/td>\n13<\/td>\n4.1<\/td>\n6.2<\/td>\n5.2<\/td>\n7.8<\/td>\n6.1<\/td>\n6.3<\/td>\n8.1<\/td>\n7.6<\/td>\n5.6<\/td>\n8.2<\/td>\n<\/tr>\n
    Tensile Strength<\/td>\n13<\/td>\n12.2<\/td>\n11.5<\/td>\n12.4<\/td>\n11.7<\/td>\n12<\/td>\n11.7<\/td>\n11.8<\/td>\n12.2<\/td>\n11.5<\/td>\n12.5<\/td>\n<\/tr>\n
    Elongation at break<\/td>\n180<\/td>\n131<\/td>\n138<\/td>\n125<\/td>\n142<\/td>\n132<\/td>\n139<\/td>\n153<\/td>\n147<\/td>\n162<\/td>\n157<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    Table. 3 Binary mixtures treatment results<\/strong><\/p>\n

    [\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=”4.25.1″ _module_preset=”default” width=”100%” max_width=”1200px” max_width_tablet=”95%” max_width_phone=”95%” max_width_last_edited=”on|phone” module_alignment=”center” custom_padding=”||0px|||” locked=”off” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.16″ _module_preset=”default” custom_css_main_element=”margin:auto;” global_colors_info=”{}”][et_pb_text _builder_version=”4.25.2″ _module_preset=”default” text_font_size=”18px” header_4_font=”|700|||||||” header_4_text_align=”center” header_4_font_size=”15px” header_4_line_height=”1.4em” text_orientation=”center” module_alignment=”center” overflow-x=”visible” overflow-y=”visible” custom_margin=”||||false|false” overflow-x_tablet=”scroll” overflow-x_phone=”scroll” overflow-x_last_edited=”on|desktop” global_colors_info=”{}”]<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
    Formulations<\/strong><\/td>\nRef. Cmpd<\/strong><\/td>\nFT23<\/strong><\/td>\nFT24<\/strong><\/td>\nFT25<\/strong><\/td>\nFT26<\/strong><\/td>\n<\/tr>\n<\/thead>\n
    Treatment of Ecopiren (%wt)<\/td>\n\u2014<\/td>\n1.8<\/td>\n1.8<\/td>\n1.8<\/td>\n1.8<\/td>\n<\/tr>\n
    Component 1<\/td>\n\u2014<\/td>\nPripol<\/td>\nPripol<\/td>\nTego 6879<\/td>\nPripol<\/td>\n<\/tr>\n
    Component 2<\/td>\n\u2014<\/td>\nAMEO<\/td>\nVTEO<\/td>\nGLYMO<\/td>\nVTEO<\/td>\n<\/tr>\n
    Component 3<\/td>\n\u2014<\/td>\nTego 6879<\/td>\nGLYMO<\/td>\nPripol<\/td>\nGLYMO<\/td>\n<\/tr>\n
    Properties<\/strong><\/td>\nApyral<\/strong><\/td>\nFT23<\/strong><\/td>\nFT24<\/strong><\/td>\nFT25<\/strong><\/td>\nFT26<\/strong><\/td>\n<\/tr>\n
    Density at 23\u00b0C<\/td>\n1.497<\/td>\n1.487<\/td>\n1.482<\/td>\n1.488<\/td>\n1.483<\/td>\n<\/tr>\n
    MFI \u2013 21,6kg @ 190\u00b0C<\/td>\n13<\/td>\n6.9<\/td>\n5.8<\/td>\n6.2<\/td>\n3.4<\/td>\n<\/tr>\n
    Tensile Strength<\/td>\n13<\/td>\n11.3<\/td>\n11.2<\/td>\n10.9<\/td>\n11.2<\/td>\n<\/tr>\n
    Elongation at break<\/td>\n180<\/td>\n145<\/td>\n154<\/td>\n139<\/td>\n147<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    Table. 4 Ternary mixtures treatment results<\/h4>\n

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