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china latest news about Types, Mechanisms, and Characteristics of Defoamers

Types, Mechanisms, and Characteristics of Defoamers

December 9, 2025

Defoamers are chemical additives that reduce foam stability, eliminate, or inhibit foam formation. They are widely used in various industries, including chemical processing, food, papermaking, textiles, wastewater treatment, coatings, pharmaceuticals, and more. Based on current knowledge and years ...
china latest news about What is the difference between block and random structures in polyethers?

What is the difference between block and random structures in polyethers?

December 8, 2025

The difference between the block structure and random structure (also known as statistical copolymer) of polyethers lies in the sequence distribution of monomer units along the polymer backbone. This structural difference directly affects their physical and chemical properties, as well as their ...
china latest news about What are the main factors affecting the reactivity of polyether hydroxyl groups?

What are the main factors affecting the reactivity of polyether hydroxyl groups?

December 4, 2025

The main factors affecting the reactivity of polyether hydroxyl groups (-OH) are multifaceted and can be summarized into the following categories: 1.Type of Hydroxyl Group (Primary vs. Secondary Hydroxyl) Primary Hydroxyl Groups: This is the most significant factor affecting reactivity. Primary ...
china latest news about Calculation and Practical Application of Surfactant/Polyether HLB Value

Calculation and Practical Application of Surfactant/Polyether HLB Value

December 2, 2025

The HLB value (Hydrophile-Lipophile Balance) of a surfactant is an extremely important concept that quantifies the relative strength and balance between the hydrophilic (water-loving) and lipophilic (oil-loving, hydrophobic) groups in a surfactant molecule. This numerical value is a key indicator ...
china latest news about Differences and Applications Between Acid Scavengers and Bases

Differences and Applications Between Acid Scavengers and Bases

November 27, 2025

In chemistry, both acid scavengers and bases are used to handle or neutralize acids, but they differ significantly in their mechanisms, purposes, and application scenarios. The following discussion focuses on their differences from the perspective of neutralization reactions. 1. Core Purpose Base: ...
china latest news about Comparison of Reactivity between Primary and Secondary Hydroxyl Groups in Polyethers with Isocyanate

Comparison of Reactivity between Primary and Secondary Hydroxyl Groups in Polyethers with Isocyanate

November 25, 2025

In polyurethane chemistry, the type of hydroxyl group (primary vs. secondary) at the terminal ends of polyether polyols significantly influences their reactivity with isocyanate (-NCO). This difference is a critical factor in formulating designs, selecting raw materials, and adjusting process ...
china latest news about What is Polyether EOD? What Are Its Performance Advantages?

What is Polyether EOD? What Are Its Performance Advantages?

November 21, 2025

In the polyurethane industry, "Polyether EOD" typically refers to a polyether polyol that is end-capped with ethylene oxide (EO). Core Concept: What Does "End-Capping" Mean? In the synthesis of polyether polyols, propylene oxide (PO) is generally used as the main building block to form the backbone ...
china latest news about Polyether-Polysiloxane Polyols in Polyurethane Applications

Polyether-Polysiloxane Polyols in Polyurethane Applications

November 20, 2025

Polyether-polysiloxane polyols represent a significant class of modifiers in polyurethane chemistry, skillfully combining the flexibility of polyethers with the superior surface properties of polysiloxanes. I. What are Polyether-Polysiloxane Polyols? First, let's understand their molecular structure...