ZG-X22D Mono-End Hydroxypropyl-Functional Polydimethylsiloxane
ZG-X22D contains a single reactive primary hydroxyl group at one end of the molecule, with the other end being a non-reactive capping group. The hydroxyl can react with isocyanates and, under suitable conditions, can also participate in esterification, incorporating PDMS segments at the end or side chains of resin molecules in a single-point manner. Because it contains on average only one hydroxyl reactive site, this product is better suited for end-capping, molecular weight adjustment and low-crosslinking risk surface functionalization.
Product positioning: mono-end monohydroxyl reactive silicone macromolecular capping/grafting agent for end-group adjustment, molecular weight control and reactive surface modification of polyurethane and polyester systems
Product Features
Reactive Flexible Segment
PDMS segments are chemically incorporated into the resin system via hydroxyl reaction, helping reduce the migration, exudation and insufficient durability risks of ordinary silicone oils
Flexibility and Stress Relief
Improves softness, resilience, slip, hydrophobicity, anti-blocking, stain resistance and friction performance, and helps relieve internal stress in the system
High Reaction Efficiency
Low-molecular-weight grades have higher hydroxyl density and more pronounced reaction efficiency, suitable for systems requiring high reaction participation
Pronounced Surface Effect
High-molecular-weight grades show a more pronounced PDMS surface effect, but require reinforced compatibility evaluation
Typical Technical Specifications
| Model | Nominal Mn (g/mol) | Viscosity (25°C, mPa·s) | Hydroxyl Equivalent (g/eq) | Hydroxyl Content (mmol/g) | Hydroxyl Value (mg KOH/g) |
|---|---|---|---|---|---|
| ZG-X22D-2000 | 2000 | 44 | 2000 | 0.500 | 28.05 |
| ZG-X22D-3000 | 3000 | 46 | 3030 | 0.330 | 18.51 |
| ZG-X22D-4000 | 4000 | 65 | 3700 | 0.270 | 15.16 |
Note: Nominal Mn is a grade reference. Technical specifications are typical values; the actual batch is subject to the COA.
Applications and Recommended Dosage
| Application System | Recommended Dosage | Recommended Usage |
|---|---|---|
| PU/PUD/TPU | 0.2%-2.0% | 0.2%-2.0% of resin solids |
| Polyester/Reactive Resins | 0.2%-2.0% | 0.2%-2.0% of resin solids |
| Leather Topcoats, Synthetic Leather and Functional Coatings | 0.2%-1.5% | 0.2%-1.5% of resin solids |
| Reactive Slip/Surface-Control Additives | 0.1%-1.0% | 0.1%-1.0% of the total formulation |
Compatibility Reference
| Resin System | Compatibility | Notes |
|---|---|---|
| Polyurethane (PU/PUD/TPU) | Excellent | Single hydroxyl reacts with isocyanate for end-capping |
| Polyester Resin | Good | Can participate in esterification under suitable conditions |
| Acrylate Resin | Moderate | Compatibility needs evaluation; pre-trials recommended |
| Epoxy Resin | Moderate | Compatibility needs evaluation; pre-trials recommended |
| Waterborne Systems | Good | Low-molecular-weight grades offer better compatibility |
Note: Compatibility is a general reference. Actual results are affected by the resin system, solvent, process conditions and other factors; pre-trials are recommended for confirmation.
Packaging, Storage and Safety
Packaging:25 kg, 50 kg, 200 kg plastic drums; other specifications negotiable
Storage:Keep containers sealed and store in a cool, dry, ventilated place at 5-35°C, away from moisture and direct sunlight
Shelf Life:Recommended shelf life of 12 months in unopened conditions