Carboxyl-terminated hyperbranched polyester-modified epoxy resin curing system
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Product Overview: Hyperbranched polymers are dendrimeric polymers with a highly branched three-dimensional structure. They contain numerous modifiable end groups, and exhibit advantages such as minimal intermolecular entanglement, good solubility, low viscosity, ease of film formation, and high reactivity. Hyperbranched polymers whose ends all bear carboxyl groups demonstrate the best toughening effect; they can be used to toughen epoxy resin systems. Not only do they serve as toughening agents, but they also function as curing agents. Properties: Solid at room temperature; enhances strength and toughness; contains carboxyl groups; highly reactive; has a high molecular weight; non-volatile. Typical applications: The end-carboxylated hyperbranched polyester resin can be used as a curing agent and a strength- and toughness-enhancing additive for epoxy resins ； It can also be used for the preparation and modification of color masterbatches for thermoplastic polymer materials such as PP, PE, PS, PVC, and PC. It significantly improves the dispersion of the color masterbatch, melt flow properties, and surface characteristics, while markedly reducing processing current and temperature, thereby conserving energy and lowering consumption. Performance specifications of the Hyper C10 series: Hyper C10C101C102C103C104. Carboxyl number/mol: 6, 12, 24, 48. Acid value mg KOH/g: 320, 240, 220, 210. Hydroxyl value mg KOH/g
In the curing system of epoxy resin modified with carboxyl-terminated hyperbranched polyester, the carboxyl groups readily react with epoxy groups at high temperatures. Carboxyl-terminated hyperbranched polyesters not only act as modifiers, but also serve as curing agents. When the mass fraction of carboxyl-terminated hyperbranched polyester is 15% and that of the curing agent is 50%, the toughness of the epoxy system is maximized, with the impact strength increasing by twofold.
Hyperbranched polymers are dendrimer-like macromolecules with highly branched three-dimensional structures. They contain numerous modifiable end-groups, and exhibit advantages such as minimal intermolecular entanglement, good solubility, low viscosity, ease of film formation, and high reactivity. Hyperbranched polymers whose ends all bear carboxyl groups exhibit the best toughening effect; they can be used to toughen epoxy resin systems. Not only do they serve as toughening agents, but they can also function as curing agents.
Carboxyl-terminated hyperbranched polyester resin can be used as a curing agent and toughening/reinforcing additive for epoxy resins； It can also be used for the preparation and modification of color masterbatches for thermoplastic polymer materials such as PP, PE, PS, PVC, and PC. It significantly improves the dispersion of the color masterbatch, melt flow properties, and surface characteristics, while markedly reducing processing current and temperature, thereby conserving energy and lowering consumption.
The hydroxyl-terminated hyperbranched polyester is applied to epoxy resin potting compounds; it is diluted with a polar solvent, and adding 5% of this material enhances and toughens the epoxy filler system. Applied to water-based coatings, filler dispersant
Carboxyl-terminated hyperbranched polymers have a heat-resistant structure and a high thermal decomposition temperature! Structurally, compared to EBS (N,N′-ethylenebisstearamide), HyPer C100 has a high molecular weight (over 2,000). Its surface is covered with numerous strongly polar carboxyl groups (-COOH). It exhibits excellent thermal resistance (melting range of 160–180°C; thermal decomposition temperature of around 300°C, as shown in the Tg curve). Additionally, it is stable, non-volatile, and environmentally friendly (upon decomposition at 400°C, only water and CO2 are produced, as confirmed by thermal gravimetric analysis data). As a high-temperature-resistant, multi-functional flow and dispersion lubricant, the increased number of polar groups in the HyPer C100 resin enhances its compatibility with highly polar polymers ； The polar carboxyl group has a strong adsorption capacity toward inorganic pigments, etc., enabling the dispersion of pigments/filler powders/functional powders in a high-molecular-weight resin system while maintaining their stable dispersed state ； Polar groups fix lubricant molecules to the surface of molecular clusters with effective rheology; even at very low concentrations, they have a significant effect on rheology ； Carboxylic acids and their derivatives can wet metal surfaces, producing a significant demolding effect! Therefore, HyPer C100 is a multi-functional internal and external lubricant!