POP (Polyether Polyol) Plant

Polyether Polyol is an important polyol compound commonly used in the preparation of polyurethane.

Polyether polyols have the following main uses:

1. Polyurethane elastomers: Polyether polyols are the main raw materials for preparing polyurethane elastomers, which can react with polyisocyanates (such as MDI) to form polyurethane elastomers. They are used to manufacture elastic materials such as furniture, car seats, mats, shoe soles, etc.

2. Polyurethane spray coating: Polyether polyols can form two-component polyurethane spray coatings with isocyanates, which are used for coating automobiles, building exterior walls, roofs, pipelines, etc., providing protection and decorative effects.

3. Polyether polyol toughening agent: Polyether polyols can be used as toughening agents for thermoplastic or thermosetting resins to improve the toughness and strength of materials.

4. Polyether polyol flame retardant: polyether polyol can be compounded with flame retardant to prepare fireproof materials, such as flame retardant polyurethane foam.

5. Polyether polyol lubricant: Polyether polyols have good lubricating properties and can be used as lubricants. For example, when preparing lubricating grease, polyether polyols can be added to improve the lubrication effect.

In summary, polyether polyols have a wide range of applications, mainly used in the preparation of polyurethane, spray coatings, toughening agents, flame retardants, and lubricants.

Introduction

Polyether polyols are formed by ring opening polymerization of polyols, polyamines, or other active hydrogen containing compounds with oxidized olefins such as propylene oxide, ethylene oxide, and styrene oxide under the action of catalysts. Due to the varying properties and applications of products with different initiators and polymerization degrees, there are many varieties and grades of polyether products. Polyether polyols are mainly used in the polyurethane industry. Polyurethane materials have excellent properties, wide applications, and a variety of product types. According to the performance of polyether products, they can be divided into soft foam polyether, hard foam polyether, elastomeric polyether, polyether polyol (also known as graft polyether), and high resilience polyether.

Process Features

Diverse Catalysts
- Alkaline catalysts (e.g., KOH): Cost-effective, suitable for standard products.
- Double metal cyanide (DMC) catalysts: High activity, mild reaction conditions (low temperature/pressure), minimal side reactions, and narrow molecular weight distribution with low unsaturation (<0.02 meq/g).
Highly Tunable Structure
- Precise control over product architecture (block, random, branching) via selection of initiators (functionality, type) and epoxides (PO/EO ratio, feeding sequence), enabling performance customization.
Modular Production Process
- Independent control of stages (initiation, polymerization, post-treatment) allows flexible parameter adjustments (temperature, pressure, feeding rate) for diverse product specifications.
Sustainability and Recycling
- Recovery of unreacted epoxide monomers (via vacuum devolatilization), reducing raw material waste.
- Neutralization of waste catalysts (e.g., KOH converted to potassium phosphate salts), minimizing environmental impact.
Safety-Oriented Design
- Explosion-proof systems (sealed reactors, inert gas protection) for handling flammable epoxides.
- Automated controls to reduce operational risks.

Process Advantages

High Efficiency and Cost-Effectiveness
- DMC catalysts shorten reaction time by 30–50% compared to KOH, lowering energy consumption.
- Closed-loop recycling of epoxides reduces raw material costs.
Superior Product Performance
- Low unsaturation (DMC process) enhances mechanical strength and aging resistance of polyurethane products.
- Narrow molecular weight distribution (PDI <1.2) ensures uniformity and processing stability.
Broad Application Scope
- Covers diverse fields: soft foams (low-functionality glycerol-based products), rigid foams (high-functionality sucrose-based products), elastomers (EO-block hydrophilic structures).
- Customizable for high-end applications (medical materials, automotive components).
Environmental Compliance
- Reduced VOC emissions (efficient devolatilization).
- Low catalyst residues (<10 ppm), complying with EU REACH regulations.
Precision Quality Control
- Real-time monitoring of hydroxyl value, viscosity, and moisture ensures batch consistency.
- Rapid parameter adjustments to meet market demands (e.g., switching molecular weights).

POP (Polyether polyol) Specification

S/N	ltems	POP
S/N	ltems	High-resilience 1#	High-resilience 2#	Elastomer 1#	Elastomer 2#
1	Appearance	/	/	/	/
2	mgKOH/g Hydroxyl value, mgkOH/g	32~36	26~30	54.5~57.5	26.5~-29.5
3	mgKOH/g≤ Acid value, mgkOH/g≤	0.05	0.05	0.05	0.05
4	%≤ Water, %≤	0.05	0.05	0.02	0.02
5	mPa-s Viscosity(25°C),mPa-s	790~930	1060~1260	270~370	800~100
6	pH value	/	/	5~8	5~8
7	molKgUnsaturated value, molKg	0.07	0.08	0.01	0.01
8	(mg/kg)≤ Residual acrylonitrile/styrene.(mg/kg)≤	/	/	/	/
9	(APHA) ≤Color (APHA) ≤	30	30	30	30

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Ethylene Industry(C2)

POP (Polyether Polyol) Plant

Introduction

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Ethylene Industry(C2)

POP (Polyether Polyol) Plant

Introduction

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