Sorbitol-initiated polyether polyols, a polyether polyols synthesized from Sorbitol as the starting material, is a special chemical designed for the production of rigid polyurethane foam. This kind of polyether polyol is obtained by ring-opening polymerization of propylene oxide (PO) or other epoxy-based monomers using the polyhydroxyl structure of sorbitol as the starting point of the reaction, and has unique advantages and application characteristics.
characteristics
Sorbitol-initiated polyether polyols is a polyether polyol with a high molecular weight. It is composed of sorbitol molecules connected by ether bonds. This polyol has many excellent properties, which makes it widely used in the preparation of polyurethane and other polymer materials.
Sorbitol-initiated polyether polyols has the following characteristics:
1. High sustainability: Sorbitol-initiated polyether polyols is synthesized from plant raw materials (glycerol and sorbitol), which is more sustainable than petrochemical raw materials.
2. Good physical properties: The polyol has low viscosity and high functional group content, so it has good wear resistance, softness and mechanical properties.
3. Diverse chemical reactivity: Sorbitol-initiated polyether polyols has multiple hydroxyl functional groups and can undergo various chemical reactions such as esterification, etherification, amidation, etc., thus providing more material options and cross-linking strategies.
4. Good solubility: The polyol has good solubility in common solvents, which is conducive to mixing and dissolving with other ingredients, further improving the processing properties of the material.
5. Adjustable molecular weight and functional hydroxyl content: Sorbitol-initiated polyether polyols can adjust the molecular weight and functional hydroxyl content by changing the reaction conditions and ratios to meet the needs of different applications.
Due to the above excellent properties, sorbitol-based polyether polyols are widely used in coatings, adhesives, elastomers, foams, sealants and other fields.
FAQ
Q: What are the advantages of sorbitol-derived polyether polyols over conventional polyether polyols?
A: Sorbitol-initiated polyether polyols typically have a higher hydroxyl number and a more complex molecular structure, which allows them to provide better mechanical properties, such as higher strength and rigidity, when preparing hard foams. In addition, they have the potential to improve the heat resistance and dimensional stability of the foam, while they are also more environmentally friendly due to the renewability of sorbitol.
Q: What is the environmental impact of these polyether polyols? Is it sustainable?
A: Sorbitol is a naturally derived polyol derived from plants such as corn and wheat, so the use of sorbitol-derived polyether polyols can help reduce the dependence on petroleum-based feedstocks and reduce the carbon footprint. The choice of this bio-based material supports sustainable development and is also more environmentally friendly in the disposal of the final product.
Q: How do they perform in rigid foam applications?
A: sorbitol-derived polyether polyols can provide excellent closed-cell structure in hard foam applications, which means better insulation and water resistance. They also improve the compressive strength of foams, making them excellent in areas such as building insulation, refrigeration equipment and packaging materials.
Specification
|
Product |
BQ8213 |
Index |
|
Exterior |
Light yellow to brown yellow liquid |
Q/0600YPU 025-2012 |
|
25℃ Viscosity(mPa•s) |
2000-3000 |
GB/T 12008.7-2010 |
|
20℃ Proportion |
1.05±0.05 |
GB/T 15223-2008 |
|
Hydroxyl value(mgKOH/g) |
375±20 |
GB/T 12008.3-2009 |
|
Water content(%) |
≤0.20 |
GB/T 22313-2008 |
|
pH value |
5.0-8.0 |
GB/T 12008.2-2010 |
|
Potassium ion(mg/kg) |
≤50 |
GB/T 12008.4-2009 |
|
Acid value(mgKOH/g) |
≤0.50 |
GB/T 12008.5-2010 |
Application
Due to its excellent properties, Sorbitol-initiated polyether polyols play a key role in several industries, especially in areas requiring high strength, thermal insulation and energy saving.
1.Building insulation materials: used for insulation of walls, roofs and floors to improve the energy efficiency of buildings.
Refrigeration equipment: as the insulation material of refrigerators, freezers, refrigerated trucks, etc., to maintain a low temperature environment and reduce energy consumption.
2.Pipe insulation: applied to industrial pipes and domestic hot water pipe insulation to prevent heat loss.
3.Home appliance manufacturing: Used for refrigerators, water heaters and other home appliance insulation layer, to provide efficient insulation effect.
4.Automotive parts: Make automotive interior parts, such as door panels, instrument panels, etc., to reduce weight and provide sound insulation and heat insulation.
5.Packaging materials: Certain rigid foams can be used as protective packaging for high-grade fragile products or refrigerated foods.
6.Mold and model making: Used in some mold making that requires accurate shape and dimensional stability.
Packing
The rigid polyurethane foam packed in galvanized steel drum;
Each drum is 200kg in net weight.
Keep dry and cool,no sunlight and heat
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