RHEOLATE® 208

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Description

RHEOLATE® 208 is a rheological additive in powder form, specifically designed for use in water-borne systems like latex paints. Here's an overview of its features and applications:

General Information: RHEOLATE 208 is a 100% solids urethane associative rheology modifier. It is particularly useful in formulations requiring reduced VOC or solvent-free options, where a powdered product is more convenient. It offers benefits beyond its liquid counterpart, RHEOLATE 278 TF.

Chemical & Physical Properties:

Composition: Polyether urea polyurethane
Color/Form: White, finely divided powder
Density: 1.2 g/cm³
Non-volatile content: 100%

Applications:

Gloss latex paints
Satin-gloss latex paints
Latex paints for interior and exterior applications
Water-borne paints and inks

Key Properties:

100% solids powder, containing no coalescing solvent
Excellent rheology, providing superior high-shear viscosity and film build
Excellent paint performance, including flow and leveling, reduced spattering during roller application, and pH-independent rheology
Compatibility with other rheological additives, offering broad formulating flexibility

Incorporation: RHEOLATE 208 is best incorporated as a water gel. A typical pre-mix method involves mixing 4 parts of RHEOLATE 208 with 96 parts of water at moderate speed for 15 minutes. The pre-dispersion can be added at any stage of letdown, but addition before letdown of the mill-base is recommended.

Levels of Use: Typical use levels range from 0.1% to 0.6% on the total paint weight. The performance of RHEOLATE 208 must be evaluated in the complete paint formulation. Adjustment of the surfactant blend may be necessary to achieve optimum properties.

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Hazards Identification
- Classification:
  - Specific target organ toxicity - repeated exposure, Category 2 (Lungs).
- Hazard Statements:
  - H373: May cause damage to organs (lungs) through prolonged or repeated exposure if inhaled.
- Precautionary Statements:
  - P260: Do not breathe dust.
  - P314: Get medical advice/attention if you feel unwell.
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WALOCEL™ CRT 10000 G Sodium Carboxymethylcellulose is a specific type of sodium carboxymethylcellulose (CMC) produced by The Dow Chemical Company. Here's a detailed overview based on the provided sales specification:
Product Overview:
- Product Name: WALOCEL™ CRT 10000 G
- Chemical Name: Sodium Carboxymethylcellulose
- Specification Number: 000000127502
- Previous Specified Material: 00160302
- Trademark: WALOCEL™ (Trademark of The Dow Chemical Company)
Specifications and Testing Requirements:
1. Active Content (Dry Basis):
  - Minimum: 99.00%
  - Method: CE-55.4
  - Test Frequency: Audit basis
2. Substitution Degree:
  - Range: 0.82 — 0.95
  - Method: CE-28.4
3. Moisture Content (As Packaged):
  - Maximum: 8.0%
  - Method: CE-7.1
4. pH Value (1% Aqueous Solution):
  - Range: 6.5 — 8.5
  - Method: CE-8.1
5. Total Salt Content (Dry Basis):
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  - Method: CE-15.4
  - Test Frequency: Audit basis
6. Viscosity (Brookfield, LVT, SP.3, 30 RPM, 1% Aqueous Solution, Dry Basis, 25°C):
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Product Characteristics:
- Active Content: Indicates the amount of carboxymethylcellulose present in the product.
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- Moisture Content: The amount of water present in the product. This can affect the product’s handling and performance.
- pH Value: Measures the acidity or alkalinity of a 1% aqueous solution of the product.
- Total Salt Content: Indicates the amount of salt present, which can influence the viscosity and stability of the product.
- Viscosity: A measure of the product's thickness or resistance to flow in an aqueous solution. This is important for its functionality in various applications.
Usage and Safety:
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Product Overview:
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- CAS Number: 29911-27-1
Description:
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Physical Properties:
- Molecular Weight: 176.2 g/mol
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- Flash Point (Setaflash Closed Cup): 88°C (190°F)
- Freezing Point: <-75°C (<-103°F)
- Vapor Pressure at 20°C: 0.08 mmHg (0.11 mbar)
- Specific Gravity (25/25°C): 0.919
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  - @ 25°C: 0.916 g/cm³ (7.65 lb/gal)
- Viscosity at 25°C: 11.4 cP (mPa•s)
- Surface Tension at 25°C: 27.8 dynes/cm (mN/m)
- Specific Heat at 25°C: 1.94 J/g/°C
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- Autoignition Temperature: 205°C (401°F)
- Evaporation Rate:
  - n-Butyl Acetate = 1.0: 0.014
  - Diethyl Ether = 1.0: 903
- Solubility at 25°C:
  - Solvent in Water: 17.2 g/100 g (15 wt%)
  - Water in Solvent: 22.5 g/100 g (18.5 wt%)
Hansen Solubility Parameters:
- Dispersion (d): 15.0 (J/cm³)^(1/2)
- Polar (p): 3 (J/cm³)^(1/2)
- Hydrogen Bonding (h): 9.6 (J/cm³)^(1/2)
Flammable Limits (Vol.% in Air):
- Lower: 0.68%
Applications:
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Product Overview:
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- Manufacturer: Evonik Operations GmbH
Description:
TEGO® Airex 902 W is a highly effective and compatible deaerator emulsion based on polyether siloxane technology. It is particularly effective against both micro-foam and macro-foam.
Key Benefits:
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Solubility:
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RHEOLATE® 208

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RHEOLATE® 208

Manufacturer

Main Actions

Description

Files

Categories

Application

Add a review

Leave a Reply · Cancel reply

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