English
| Quantity: | |
|---|---|
XF-250P
PET Polyester Polyol is a specific type of polyol (a key component in polyurethane production) that is synthesized by chemically recycling Polyethylene Terephthalate (PET) waste, most commonly from post-consumer plastic bottles.
It is produced through a chemical reaction called glycolysis, where PET waste is broken down by reacting it with a glycol (like Diethylene Glycol - DEG) at high temperatures in the presence of a catalyst.
The result is a viscous, often amber-colored liquid containing oligoesters with terminal hydroxyl (-OH) groups, which are reactive sites for making polyurethane.
The production is a form of chemical upcycling:
Feedstock Preparation: Post-consumer PET bottles are collected, sorted, washed, and shredded into small flakes.
Reaction: The PET flakes are heated and agitated with an excess of a glycol (e.g., Diethylene Glycol) and a catalyst (e.g., zinc acetate).
Depolymerization: The long polymer chains of PET are broken down (depolymerized) by the glycol. The reaction transesterifies the PET, cutting the chains and capping them with hydroxyl groups.
Purification: The resulting mixture may be filtered to remove impurities (like pigments, labels) to yield the final PET polyester polyol.
Simplified Chemical Idea:PET (from bottles) + Glycol (e.g., DEG) → PET Polyester Polyol
PET Polyester Polyols are characterized by their rigid, aromatic structure inherited from the terephthalic acid in PET.
High Rigidity and Hardness: The aromatic (benzene) rings in the backbone provide excellent structural strength, rigidity, and thermal stability to the final polyurethane.
Good Mechanical Properties: They contribute to high tensile strength, tear resistance, and abrasion resistance.
Excellent Chemical and Solvent Resistance: Particularly resistant to hydrocarbons, oils, and oxidizing agents.
Hydrolytic Stability: This is a relative weakness. The ester linkages can be susceptible to breakdown by water and acids over time, especially when compared to polyether polyols.
Higher Viscosity: Typically more viscous than many polyether polyols, which can sometimes require adjustments in processing.
| Advantages | Disadvantages |
|---|---|
| ♻️ Cost-Effective: Significantly cheaper than virgin polyols, as it uses waste material. | ️ Lower Hydrolytic Stability: Can degrade in consistently moist or acidic environments. |
| Environmental Benefit: Provides a valuable outlet for plastic waste, promoting a circular economy. | ⚠️ Variable Quality: The quality can depend on the purity of the PET waste stream. |
| ️ Superior Performance: Imparts excellent mechanical, thermal, and chemical resistance properties. | Color: Often has a yellow/brown color, which is unsuitable for clear or light-colored applications. |
| Good Flame Retardancy: The aromatic structure offers inherent flame resistance. | Higher Viscosity: Can be more challenging to pump and mix during processing. |
PET Polyester Polyols are predominantly used in rigid polyurethane foam applications where their structural and thermal properties are most beneficial.
Rigid Polyurethane Foam (Most Common Use):
Thermal Insulation Panels: For construction (walls, roofs, cold storage warehouses) and appliances (refrigerators, water heaters). The foam provides excellent insulating properties (low thermal conductivity) and dimensional stability.
Coatings, Adhesives, Sealants, and Elastomers (CASE):
Coatings: Used to create durable, chemical-resistant, and protective coatings for concrete, steel, and flooring.
Adhesives & Sealants: Provides strong bonds and good resistance to environmental factors.
Elastomers: Used for industrial wheels, gaskets, and other parts requiring toughness.
Non-Cellular Applications:
Foundry Binders: Used as a binding resin in the foundry industry for sand cores and molds.
| Feature | PET Polyester Polyol | Conventional Polyester Polyol | Polyether Polyol |
|---|---|---|---|
| Feedstock | Recycled PET Bottles | Virgin Diacids & Glycols | Petroleum-derived Oxides |
| Cost | Low | Medium to High | Medium |
| Rigidity | High | High | Low to Flexible |
| Hydrolytic Stability | Low | Low | High |
| Chemical Resistance | High | High | Low to Medium |
| Primary Use | Rigid Foam | Rigid Foam, Elastomers | Flexible Foam, Elastomers |
PET Polyester Polyol is a prime example of successful industrial upcycling. It transforms a challenging waste stream (PET bottles) into a high-value, performance-driven chemical feedstock for the polyurethane industry. Its primary role in producing cost-effective, high-performance rigid insulation foams makes it a crucial material in both the construction and appliance sectors, all while addressing critical environmental concerns around plastic waste.
Parameters
| Product Model | Hydroxyl value (mgKOH/g) | Acid Value (mgKOH/g) | Moisture (%) | Viscosity (CPS 25℃) |
| XF-250P | 260±10 | ≤1.5 | ≤0.1 | 11000±2000 |
PET Polyester Polyol is a specific type of polyol (a key component in polyurethane production) that is synthesized by chemically recycling Polyethylene Terephthalate (PET) waste, most commonly from post-consumer plastic bottles.
It is produced through a chemical reaction called glycolysis, where PET waste is broken down by reacting it with a glycol (like Diethylene Glycol - DEG) at high temperatures in the presence of a catalyst.
The result is a viscous, often amber-colored liquid containing oligoesters with terminal hydroxyl (-OH) groups, which are reactive sites for making polyurethane.
The production is a form of chemical upcycling:
Feedstock Preparation: Post-consumer PET bottles are collected, sorted, washed, and shredded into small flakes.
Reaction: The PET flakes are heated and agitated with an excess of a glycol (e.g., Diethylene Glycol) and a catalyst (e.g., zinc acetate).
Depolymerization: The long polymer chains of PET are broken down (depolymerized) by the glycol. The reaction transesterifies the PET, cutting the chains and capping them with hydroxyl groups.
Purification: The resulting mixture may be filtered to remove impurities (like pigments, labels) to yield the final PET polyester polyol.
Simplified Chemical Idea:PET (from bottles) + Glycol (e.g., DEG) → PET Polyester Polyol
PET Polyester Polyols are characterized by their rigid, aromatic structure inherited from the terephthalic acid in PET.
High Rigidity and Hardness: The aromatic (benzene) rings in the backbone provide excellent structural strength, rigidity, and thermal stability to the final polyurethane.
Good Mechanical Properties: They contribute to high tensile strength, tear resistance, and abrasion resistance.
Excellent Chemical and Solvent Resistance: Particularly resistant to hydrocarbons, oils, and oxidizing agents.
Hydrolytic Stability: This is a relative weakness. The ester linkages can be susceptible to breakdown by water and acids over time, especially when compared to polyether polyols.
Higher Viscosity: Typically more viscous than many polyether polyols, which can sometimes require adjustments in processing.
| Advantages | Disadvantages |
|---|---|
| ♻️ Cost-Effective: Significantly cheaper than virgin polyols, as it uses waste material. | ️ Lower Hydrolytic Stability: Can degrade in consistently moist or acidic environments. |
| Environmental Benefit: Provides a valuable outlet for plastic waste, promoting a circular economy. | ⚠️ Variable Quality: The quality can depend on the purity of the PET waste stream. |
| ️ Superior Performance: Imparts excellent mechanical, thermal, and chemical resistance properties. | Color: Often has a yellow/brown color, which is unsuitable for clear or light-colored applications. |
| Good Flame Retardancy: The aromatic structure offers inherent flame resistance. | Higher Viscosity: Can be more challenging to pump and mix during processing. |
PET Polyester Polyols are predominantly used in rigid polyurethane foam applications where their structural and thermal properties are most beneficial.
Rigid Polyurethane Foam (Most Common Use):
Thermal Insulation Panels: For construction (walls, roofs, cold storage warehouses) and appliances (refrigerators, water heaters). The foam provides excellent insulating properties (low thermal conductivity) and dimensional stability.
Coatings, Adhesives, Sealants, and Elastomers (CASE):
Coatings: Used to create durable, chemical-resistant, and protective coatings for concrete, steel, and flooring.
Adhesives & Sealants: Provides strong bonds and good resistance to environmental factors.
Elastomers: Used for industrial wheels, gaskets, and other parts requiring toughness.
Non-Cellular Applications:
Foundry Binders: Used as a binding resin in the foundry industry for sand cores and molds.
| Feature | PET Polyester Polyol | Conventional Polyester Polyol | Polyether Polyol |
|---|---|---|---|
| Feedstock | Recycled PET Bottles | Virgin Diacids & Glycols | Petroleum-derived Oxides |
| Cost | Low | Medium to High | Medium |
| Rigidity | High | High | Low to Flexible |
| Hydrolytic Stability | Low | Low | High |
| Chemical Resistance | High | High | Low to Medium |
| Primary Use | Rigid Foam | Rigid Foam, Elastomers | Flexible Foam, Elastomers |
PET Polyester Polyol is a prime example of successful industrial upcycling. It transforms a challenging waste stream (PET bottles) into a high-value, performance-driven chemical feedstock for the polyurethane industry. Its primary role in producing cost-effective, high-performance rigid insulation foams makes it a crucial material in both the construction and appliance sectors, all while addressing critical environmental concerns around plastic waste.
Parameters
| Product Model | Hydroxyl value (mgKOH/g) | Acid Value (mgKOH/g) | Moisture (%) | Viscosity (CPS 25℃) |
| XF-250P | 260±10 | ≤1.5 | ≤0.1 | 11000±2000 |
