Compatibilizers for Polymer Blends — Graft Copolymers | MW

Multifunctional compatibilizer J-4

admin — Thu, 08 Feb 2018 13:37:36 +0000

Description

J-4 is a multifunctional reactive compatibilizer and chain extender for condensation polymers (PET, PBT, PC, PA66, PA6). Its epoxy functional groups react with the terminal carboxyl and hydroxyl groups of polyesters and polycarbonates, building up molecular weight and restoring melt viscosity when reprocessing recyclate. It improves hydrolytic stability, enhances physical and mechanical properties, and makes it possible to combine any pair of condensation polymers. An alternative to BASF Joncryl ADR 4368 in chain extension applications.

Key properties

Epoxy chain extender — restores the molecular weight of PET/PBT/PA66
Improves the hydrolytic stability of condensation polymers
Reactive compatibilization of PET-PC, PA-PBT and other blends
Improves melt viscosity when reprocessing recyclate
Low dosage: 0.3-1.0 % of polymer weight
Compatible with injection molding, extrusion and blow molding

Applications

PET and PBT recycling. Restoring the IV (intrinsic viscosity) of recycled PET — for bottles, hot-fill containers, films. Particularly effective when reprocessing rPBT for automotive use.

Hydrolysis-resistant PA66 and PBT. Improved hydrolysis resistance in parts operating in high-humidity conditions (engine compartment, household appliances).

Condensation polymer blends. PC-PBT, PA-PET, PA-PC — compatibilization for technical parts.

Bottle production from recyclate. Restoring rPET properties for bottle-to-bottle recycling.

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PA-PE compatibilizer

admin — Thu, 08 Feb 2018 13:35:00 +0000

Description

A reactive compatibilizer for PA-PE blends — a polyolefin grafted with maleic anhydride (PE-g-MAH). The maleic groups react with the terminal amino groups of the polyamide, forming covalent bonds between the polar PA phase and the non-polar PE phase. The result: better dispersion of the PE domain, reduced interfacial stresses, and no delamination during molding and pelletizing. Particularly effective when reprocessing rPA (from cable ties, housings, reinforced components) contaminated with polyethylene.

Key properties

Reactive PE-g-MAH compatibilizer for PA-PE blends
Reduces interfacial delamination in polar/non-polar blends
Improves melt homogeneity and blend flowability
Increases impact strength and ductility of PA-PE composites
Compatible with injection molding and extrusion pelletizing
Typical dosage 3-8 % of the PE fraction weight

Applications

Polyamide recycling (rPA). Compounding of recycled PA contaminated with polyolefins (from cable ties, films, labels) — allows contaminated PE streams to be processed without separation.

PA-PE engineering blends. Creation of impact-modified compounds for technical parts — housings, connectors, brackets.

Barrier films. Multilayer PA/PE structures for food packaging (directional permeability).

Processing additive. Improved compatibility when compounding polyamides with glass-filled LDPE/HDPE compositions.

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PET-PE Compatibilizer

admin — Thu, 08 Feb 2018 13:27:28 +0000

Description

A reactive compatibilizer for PET-PE blends — a polyolefin grafted with maleic anhydride or glycidyl methacrylate, with functional groups that bond to the terminal -OH/-COOH groups of PET. It reduces phase separation in PET-LDPE/PE blends (a typical problem when processing rPET contaminated with film and cap residues) and improves the low-temperature performance and impact strength of the final material. Suitable for injection molding and extrusion pelletizing of rPET.

Key properties

Reactive PET-PE compatibilizer with functional groups
Reduces phase separation in PET blends with LDPE/HDPE
Improves low-temperature performance and impact strength of the final material
Improves melt homogeneity and flowability
Compatible with injection molding and extrusion pelletizing
Typical dosage 2-5% by weight of PET

Applications

PET recycling (rPET). Compounding of recycled PET with polyolefin residues (from caps, labels, films) — allows processing of PE-contaminated rPET streams without separation.

PET fiber and engineering grades. Production of impact-resistant PET compounds for technical parts.

Roofing and geomembrane materials. PET-PE blends for waterproofing.

Automotive and electronics. Impact-modified PET-PE compounds for under-hood parts and electronics housings.

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