{"id":1610,"date":"2021-02-02T16:01:37","date_gmt":"2021-02-02T13:01:37","guid":{"rendered":"https:\/\/materialwizard.com.ua\/?p=1610"},"modified":"2026-06-07T08:54:16","modified_gmt":"2026-06-07T05:54:16","slug":"elvaloy-ptw","status":"publish","type":"post","link":"https:\/\/materialwizard.com.ua\/en\/elvaloy-ptw\/","title":{"rendered":"Elvaloy PTW"},"content":{"rendered":"

<\/p>\n

Description<\/h3>\n

Elvaloy\u00ae PTW is a reactive terpolymer of ethylene, n-butyl acrylate and glycidyl methacrylate (E\/n-BA\/GMA) developed by DuPont (now Dow) specifically as a reactive impact modifier<\/strong> for engineering polymers with ester or amide functionality: PA (polyamides), PBT (polybutylene terephthalate) and PET (polyethylene terephthalate). The PTW designation stands for Polymer Toughener with Worldwide approval (international certification for food contact).<\/p>\n

Key feature: the epoxy group of the glycidyl methacrylate unit<\/strong> (~8 wt % GMA) reacts chemically with the end groups of PA (-NH\u2082, -COOH) or the ester linkages of PBT\/PET during compounding at 250\u2013280 \u00b0C. This creates a grafted copolymer interphase<\/strong> between the matrix and the elastomer phase, improving adhesion and dispersion \u2014 considerably more effective than mechanical blending with a non-reactive elastomer (EPDM, SEBS).<\/p>\n

Effect on the final matrix: +200\u2013500 % impact strength<\/strong> at 10\u201320 % Elvaloy\u00ae PTW loading in PA, PBT or PET with minimal loss of stiffness (vs non-reactive modifiers, where the stiffness loss is 30\u201350 %). This has made Elvaloy\u00ae PTW the industry standard<\/strong> for super-tough polyamide and PBT grades.<\/p>\n

Typical parameters: GMA content ~8 wt %, n-butyl acrylate content ~28 %, ethylene ~64 %, MFR ~12 g\/10 min (190 \u00b0C \/ 2.16 kg), density 0.94 g\/cm\u00b3, melting temperature Tm ~70 \u00b0C, Vicat softening temperature 47 \u00b0C, Shore A hardness ~85, elongation at break >500 %.<\/p>\n

Key advantages<\/h3>\n
    \n
  • Reactive impact modification of PA\/PBT\/PET<\/strong> \u2014 the only modifier class that grafts chemically onto the matrix end groups (vs mechanical blending)<\/li>\n
  • +200\u2013500 % impact strength<\/strong> at 10\u201320 % loading \u2014 typical reinforcement for super-tough grades (PA66 + 15% PTW = notched impact strength of 80\u2013120 kJ\/m\u00b2 vs ~5\u20136 for unmodified PA66)<\/li>\n
  • Minimal loss of stiffness<\/strong> compared with non-reactive modifiers thanks to interfacial adhesion<\/li>\n
  • Good resistance to hydrolysis and heat ageing \u2014 critical for PBT\/PET applications<\/li>\n
  • FDA \/ EU 10\/2011 compliance for food contact (PTW = Worldwide approval)<\/li>\n
  • Suitable for recycled PET \u2014 Elvaloy\u00ae PTW restores the molecular chain length of degraded rPET through epoxy coupling<\/li>\n
  • Stability at high compounding temperatures (250\u2013290 \u00b0C) \u2014 does not scorch in the screw<\/li>\n
  • Flexible dosing \u2014 from 2 % (umbrella-effect tackifier) to 25 % (super-tough)<\/li>\n<\/ul>\n

    Applications<\/h3>\n
      \n
    • Super-tough polyamides (PA6, PA66, PA610):<\/strong> compounds with non-break unnotched impact strength (>200 kJ\/m\u00b2) \u2014 for airbag clips, snap-fit hardware and fasteners with critical impact loads at \u221240\u2026+80 \u00b0C<\/li>\n
    • Impact modification of PBT:<\/strong> for automotive connectors, electric-vehicle charging systems and consumer electronics \u2014 higher impact strength without loss of dielectric properties<\/li>\n
    • PET bottle-grade upgrading:<\/strong> adding 1\u20133 % Elvaloy\u00ae PTW to bottle-grade PET for cold climates (winter retail at \u221220 \u00b0C) \u2014 reduced brittleness<\/li>\n
    • Compatibilizer for PA\/PE blends:<\/strong> a bridge between incompatible PA and PE matrices for hybrid multilayer packaging and technical compounds<\/li>\n
    • Recycled PET \/ rPET upgrading:<\/strong> restoring the intrinsic viscosity of degraded rPET \u2014 moving from mechanical to reactive recycling<\/li>\n
    • Road construction and roofing mastics:<\/strong> bitumen modifier with improved adhesion to mineral aggregates<\/li>\n
    • Hot-melt adhesives for thermoplastics:<\/strong> connection-bridge adhesive between an EVA matrix and PA\/PET films<\/li>\n<\/ul>\n

      Limitations<\/h3>\n
        \n
      • The reactivity with PA\/PBT\/PET is a feature, but it also requires precise control of the compounding temperature<\/strong> (250\u2013280 \u00b0C; higher \u2014 GMA degradation, lower \u2014 insufficient grafting)<\/li>\n
      • Incompatible with matrices without active functional groups (PE, PP) unless an additional compatibilizer is used<\/li>\n
      • Price is 3\u20135 times higher than non-reactive impact modifiers (EPDM, SBS, SEBS) \u2014 justified only for critical super-tough applications<\/li>\n
      • The epoxy function is moisture-sensitive \u2014 the matrix must be dried before compounding<\/li>\n<\/ul>\n

        Global market counterparts: Arkema Lotader\u00ae AX8840 (E\/MA\/GMA), SK Functional Polymer Bondyram\u00ae 7103 (E\/BA\/GMA), Mitsubishi Modiper\u00ae A4400 (E\/GMA), BASF Joncryl\u00ae ADR (GMA-based chain extenders, a narrower niche). Elvaloy\u00ae PTW is the original DuPont \/ Dow grade with the longest application history and the most accessible technical support.<\/em><\/p>\n

        The stated values are measured using in-house methods close to the corresponding ISO, ASTM and GOST standards. This information is for reference only and does not constitute an official batch data sheet. Please request the TDS and MSDS for the specific batch before industrial use.<\/em><\/p>\n

        <\/p>","protected":false},"excerpt":{"rendered":"

        Description Elvaloy\u00ae PTW is a reactive terpolymer of ethylene, n-butyl acrylate and glycidyl methacrylate (E\/n-BA\/GMA) developed by DuPont (now Dow) specifically as a reactive impact modifier for engineering polymers with ester or amide functionality: PA (polyamides), PBT (polybutylene terephthalate) and PET (polyethylene terephthalate). The PTW designation stands for Polymer Toughener with Worldwide approval (international certification […]<\/p>\n","protected":false},"author":1,"featured_media":639,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10,38],"tags":[],"class_list":["post-1610","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-modifiers","category-graft-copolymers"],"yoast_head":"\nElvaloy PTW Functional Copolymer by Dow | MW<\/title>\n<meta name=\"description\" content=\"Buy Elvaloy PTW by Dow in Ukraine. 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