DOWICIL™ 75 Preservative

DOWICIL™ 75 Preservative by LANXESS is used as a preservative in water-based adhesives based on starch, latex, proteins, and natural or synthetic gums. It is 1-(3-chloroallyl)-3,5,7-triaza-1-azoniaadamantane chloride combined with a stabilizer (sodium bicarbonate). DOWICIL™ 75 Preservative offers efficiency at low concentrations, broad-spectrum activity and wide pH. It also provides highly effective antimicrobial activity.

Overview

DOWICIL™ 75 Preservative is a highly efficient, long-lasting industrial preservative developed by Dow for protecting water-based and solvent-free systems from microbial contamination. It is based on 1,2-Benzisothiazolin-3-one (BIT), a widely recognized active ingredient known for its excellent thermal and chemical stability. This preservative provides robust protection against bacteria, fungi, and yeast, making it a preferred choice for paints, adhesives, sealants, polymer emulsions, and construction chemicals. Its low volatility, resistance to degradation under alkaline conditions, and broad compatibility make it suitable for various industrial applications. DOWICIL™ 75 is particularly recommended for systems that require high durability, long storage life, and performance consistency under extreme processing conditions.

Benefits

  • Broad-Spectrum Protection: Effective against bacteria, fungi, and yeast in water-based products.

  • High Thermal & Chemical Stability: Performs in high-temperature processes and alkaline systems.

  • Extended Shelf Life: Ensures long-term preservation of finished products.

  • Excellent Compatibility: Works well with multiple industrial formulations without destabilizing systems.

  • Low Volatility & High Efficiency: Maintains efficacy without significant evaporative losses.

  • Regulatory Compliance: Meets global industrial safety and performance standards.

Applications

  • Paints & Coatings – Ensures microbial protection during storage and prevents film deterioration.

  • Adhesives & Sealants – Provides in-can preservation for waterborne adhesive formulations.

  • Polymer Emulsions – Maintains microbiological stability in latex and synthetic emulsions.

  • Construction Chemicals – Used in admixtures, cement-based mortars, plasters, and waterproofing systems.

  • Industrial Fluids – Effective in various process fluids requiring high thermal stability.

  • Printing Inks – Protects water-based ink formulations from bacterial spoilage.

Properties Table

PropertyDetails
Product NameDOWICIL™ 75 Preservative
ManufacturerDow
Chemical TypeIsothiazolinone derivative (BIT-based)
Active Ingredient1,2-Benzisothiazolin-3-one (BIT) ≥ 75%
Physical FormSolid (powder or granular)
AppearanceOff-white to light beige crystalline powder
pH (1% Solution)8.0 – 10.5
SolubilityDispersible in water; soluble in glycols
Specific GravityApprox. 1.45
Thermal StabilityExcellent resistance to heat and processing conditions
Shelf Life24 months in sealed, original container
ApplicationsPaints, Adhesives, Coatings, Construction Chemicals, Industrial Fluids
Storage ConditionsStore in a cool, dry, well-ventilated area; protect from moisture
Packaging25 kg HDPE drums or fiber containers

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