Strengthen Your PET Performance
PET Chain Extenders
KSTO offers specialized PET chain extender solutions designed to improve the mechanical performance, durability, and hydrolytic stability of polyesters such as PET and PBT. Our Amine-HCA™ and Diol-HCA™ series feature highly reactive aromatic diamine and diol compounds that repair broken polymer chains during processing and enhance resistance to degradation.
These extenders are widely used in engineering plastics, films, adhesives, and elastomers. With precise reactivity control and high thermal resistance, our chain extenders enable higher molecular weight restoration and dimensional stability for recycled or degraded PET materials.
Diol-HCA™ HQEE (Symmetric Aromatic Diol) Diol-HCA™ HER (Meta-position Aromatic Diol)
Versatile Use Cases
Recycled PET Enhancement
Amine-HCA™ and Diol-HCA™ repair chain scission in recycled PET, restoring tensile strength and molecular weight lost during degradation.
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Engineering Film and Sheet
Improve thermal and mechanical stability in PET/PBT films and sheets. Enables better dimensional control and durability in BO-PET applications.
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Injection Molding Components
Chain extenders enhance flow properties and end-use toughness in PET-based injection-molded parts, such as auto or appliance components.
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PET/PBT Blends and Composites
Facilitates compatibility and strength in polyester-based alloy systems and fiber-reinforced composites used in demanding environments.
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Why Choose Us
Boost PET quality, reduce degradation, and improve recyclability with KSTO’s proven, high-performance chain extension agents.
Precise Molecular Repair
KSTO’s chain extenders work by reacting with carboxyl and hydroxyl groups formed during PET breakdown, restoring molecular structure and improving melt viscosity. This enhances performance in recycled or thermally stressed PET and PBT, making them viable for high-performance applications once again.
Diverse Formulations for Flexibility
From delayed-reaction diamines to aromatic diols, KSTO’s portfolio suits diverse manufacturing needs—from high-speed extrusion to cast molding. Products like Amine-HCA™ C3-LF offer extended pot life and better flow, while Diol-HCA™ HQEE boosts strength, hardness, and rebound.
Industrial Validation and Ease of Use
Tested in automotive, packaging, and electronic industries, our chain extenders integrate smoothly into conventional equipment with minimal adjustment. They are thermally stable, non-corrosive, and compatible with various PET resin grades and blends.
Helpful Answers
Q1: What is a PET chain extender?
A1: It’s a reactive additive used to rebuild PET molecular chains broken during processing or degradation.
Q2: Why use a chain extender with recycled PET?
A2: It restores molecular weight and performance lost due to hydrolysis and thermal breakdown.
Q3: Which KSTO extender is best for BO-PET film?
A3: Diol-HCA™ HQEE is ideal due to its thermal stability and strong mechanical enhancement.
Q4: Can chain extenders improve impact resistance?
A4: Yes, especially Diol-HCA™ HER and P-1000, which enhance toughness in molded parts.
Q5: What is the difference between HQEE and HER?
A5: HQEE is symmetric with higher crystallinity, while HER is meta-positioned, offering slower solidification and easier processing.
Q6: Do KSTO extenders work in composite PET blends?
A6: Yes, they enhance compatibility, strength, and longevity in polyester-based composites and alloys.
Q7: Are these chain extenders safe and compliant?
A7: All products are ISO 9001 certified, with excellent thermal stability and no toxic by-products.
Let’s Talk PET Strength
Need PET performance help? Our experts are ready to assist.
Mob：+86-512-66706407
E-mail：service@kstoantihydro.com
