Landu Novastar™
High‑Thixotropy Grade
High‑Thixotropy Hydroxypropyl Starch Ether Optimized for Mechanized Construction Applications
Key Features
Ultra‑High Viscosity Range
1000 – 5000 mPa·s
Exceptional Thixotropic Behavior
Smooth & consistent pumpability
Machine Spray Mortar Optimization
Professional mechanized use
Maximum Anti‑Sagging Performance
Vertical surface application
Landu Novastar™
Specialized High‑Viscosity Starch Ether for Automated Machine Spray Mortar and Gypsum Plastering Systems
Landu Novastar™ ST2109 Hydroxypropyl Starch Ether is a machine‑spray‑specific grade engineered for professionals seeking maximum anti‑sag and rheological precision.
Combining an ultra‑wide viscosity range (1000 – 5000 mPa·s) with advanced molecular engineering, ST2109 delivers outstanding vertical stability, excellent thixotropy and premium water retention.
Developed from natural plant sources through Landu's proprietary etherification process, this grade represents the pinnacle of Hydroxypropyl Starch Ether technology for mechanized construction.
Primary Applications
Hydroxypropyl Starch Ether (HPS) · Economy & Performance Parameters
Property Data
| Property | Specification |
|---|---|
|
Appearance
|
White fine powder |
|
Viscosity
(5 % solution)
|
1000 – 5000 mPa·s
|
|
pH
(1 % solution)
|
4.0 – 8.5 |
|
Loss on Ignition
|
≤ 10 % |
|
Moisture Content
|
≤ 10 % |
|
Particle Size
|
≥ 98 % pass 100 mesh |
|
Bulk Density
|
500 – 900 g/L |
|
CAS Number
|
9049‑76‑7 |
Quality Standards
Global Regulatory Compliance
Complies with global construction‑additive regulations
Batch‑to‑Batch Uniformity
Assured via automated QC processes
ISO‑Certified Facilities
Produced in ISO‑certified manufacturing facilities
Mechanized Rheology Testing
Specialized testing for mechanized rheology compatibility
Landu Novastar™ · ST2109
Hydroxypropyl Starch Ether (HPS)
High Thixotropic Yield Value
Ensures smooth flow under shear and solid stability at rest.
Ultra‑Wide Viscosity Range
1000 – 5000 mPa·s delivers unrivaled formulation flexibility.
Maximum Anti‑Sagging
Maintains vertical stability in layers up to 40 mm thickness.
Optimized Pumpability
Engineered for continuous flow through spray equipment.
Superior Spray Pattern
Uniform coverage, minimal rebound and material loss.
Excellent Water Retention
Balanced moisture management for proper hydration.
Proven Equipment Compatibility
Tested with screw pump, piston pump and rotor‑stator systems.
Consistent Long‑Term Performance
Stable rheology throughout extended operation.
Construction Additive — Dosage · Preparation · Storage
| Application Type | Typical Dosage (% of dry mix) | Range Visual |
|---|---|---|
| Standard Machine Spray Mortar | 0.20 – 0.35 % | |
| High‑Performance Machine Spray | 0.30 – 0.45 % | |
| Automated Gypsum Plastering | 0.25 – 0.40 % | |
| Thick‑Layer Applications > 20 mm | 0.30 – 0.50 % |
Consult Landu's technical service team for equipment‑specific optimization.
Dry‑blend ST2109 into powder mix before adding any liquid components.
Add water gradually while stirring; high‑shear mix at 800 – 1200 rpm for 4 – 6 min for full dispersion.
Let stand 5 – 10 min for complete hydration of the starch ether network.
Re‑mix briefly to restore homogeneity before pumping or spraying.
Dry, ventilated space
5 – 35 °C
Moisture · Heat · Contaminants
12 months sealed
Follow general powder handling safety procedures when working with ST2109.
Hydroxypropyl Starch Ether (HPS) · Machine Spray Mortar Solutions
01
Standard
Ensures consistent pumpability and uniform spray coverage with excellent adhesion and crack resistance.
Formula
02
Lime‑Calcium
Provides workability and anti‑slump support. Smooth application and extended open time.
Typical Formula
03
Gypsum
Delivers smooth flow and premium surface finish through continuous plastering machines.
Formula
04
Thick‑Layer
Enables single‑coat application up to 40 mm. Ideal for renovation and heavy‑leveling projects.
Formula
Optimizing Hydroxypropyl Starch Ether (HPS) Performance
Piston Pump
25–50 bar
High‑pressure applications
Screw Pump
20–40 bar
Medium‑pressure, gentle
Rotor‑Stator
15–35 bar
Continuous spray
30–60 cm
Spray Distance
90°
Spray Angle
5–40 mm
Layer Thickness
24–48 h
Curing Between Passes
↗ Increase water & extend mixing time
↘ Reduce water or raise dosage +0.05–0.1 %
🔧 Clean nozzles & check pressure
💧 Adjust water‑retention additives & curing
| Product | Viscosity (mPa·s) | Ash (%) | Thixotropy | Best Use |
|---|---|---|---|---|
|
ST2109
Featured
|
1000 – 5000
|
≤ 10 | Exceptional | Machine spray specialist |
| ST1703A |
1500 – 4000
|
≤ 10 | Excellent | Workability enhanced applications |
| ST2442 |
2000 – 5000
|
≤ 12 | Excellent | Cement & gypsum multi‑systems |
| ST1506A |
500 – 3500
|
≤ 12 | Good | Universal grade |
| ST1403B |
500 – 1000
|
≤ 12 | Good | Manual gypsum putty |
Hydroxypropyl Starch Ether (HPS)
Advanced Etherification Systems
Precise rheology control at the molecular level
Automated QC Monitoring
Real‑time viscosity and thixotropy tracking
Real‑Equipment Testing
Pump and spray performance validated on‑site
ISO 9001 & ISO 14001 Certified
Quality and environmental management standards
Precision QC Laboratory
Automated Production
Equipment Testing
with Landu Novastar™ ST2109 Hydroxypropyl Starch Ether (HPS)
Dosage Adjustment
Adjust dosage for desired rheology and layer thickness.
Cellulose & RDP Synergy
Combine with cellulose ether and RDP powder for water retention and adhesion.
Fiber Reinforcement
Integrate fiber reinforcement for crack control in thick layers.
Pressure & Thixotropy Balance
Balance pump pressure and thixotropy to maximize efficiency.
Hydroxypropyl Starch Ether
Our engineers deliver end-to-end support for Hydroxypropyl Starch Ether and machine spray mortar systems — from first formulation to final spray.
Ready to optimize your mix?
Get expert guidance on ST2109 dosage, machine compatibility & formulation — fast.
Contact Us Now +86 531 6995 9221Hydroxypropyl Starch Ether · Construction Additive
Measurable technical and economic results across four application categories.
Massive-scale facade plastering with consistent spray pattern and zero sag on vertical substrates.
Retrofit coating of industrial structures requiring rapid application and superior bond strength.
Fully automated gypsum spray lines achieving 40 mm single-coat thickness with stable pump flow.
High-build vertical applications up to 40 mm per pass with exceptional anti-sagging performance.
Every grade is engineered for a specific application window — find the right match for your system.
Unlock high-thixotropy performance and maximum efficiency for automated plastering with ST2109.
