heptamethyltrisiloxane factory&supplier
Heptamethyltrisiloxane
Everything you need to know about our products and company
Physical Properties
Chemical Properties
Basic Product Information
TYPICAL PROPERTIES
Appearance | colorless transparent liquid |
purity (GC),% | >99 |
Molecular weight | 222.5 |
Safety Certifications
Product Functions
Significantly enhances fabric hydrophobic/oleophobic properties, achieving water- and stain-resistant effects.
Improves fiber wettability for uniform dye distribution and higher dye fixation rates.
Acts as a high-efficiency leveling agent, minimizing surface defects (e.g., streaks, unevenness) in textile coatings.
Reduces viscosity of coating pastes/sizing agents, boosting textile processing efficiency.
Forms a nanoscale protective network to strengthen fabric weather resistance and chemical stability.
Enhances antistatic properties, ideal for functional apparel (e.g., workwear, sportswear).
Applications
Core Advantages
Advantages | Textile Value | Technical Indicators |
Exquisite Softness | Friction coefficient reduced by 40–50%, hand feel rating improved to 4–5 (5-point scale) | KES-F friction coefficient test, subjective hand feel evaluation method |
High-Efficiency Water/Oil Repellency | Water contact angle >120°, oil contact angle >100° | Contact angle measurement (ASTM D724 standard method) |
Significant Antistatic Property | Surface resistance reduced to 10⁸–10⁹Ω, half-life <0.5 seconds | Surface resistance tester, electrostatic half-life tester |
Dyeing Enhancement | Dyeing depth increased by 15–20%, color difference <1.0 (ΔE) | Spectrophotometric color measurement (CIELAB color space) |
Environmental Safety | Harmful substance residues below detection limit, biodegradation rate >80% | GC-MS and other testing methods, biodegradation tests |
Market Value
Market Size and Growth Trends
2023 Market Size: The global market size of HMTS in the textile sector is approximately US$120–150 million, accounting for 8–10% of the functional textile auxiliaries market.
Future Growth (2024–2030): Expected to grow at a CAGR of 6–8%, with the market size reaching US$200–250 million by 2030.
Core Drivers:
Rising demand for waterproof and breathable fabrics in outdoor sportswear.
Antibacterial function upgrades in medical textiles (surgical gowns, protective clothing).
Environmental regulations promoting the substitution of per- and poly-fluorinated compounds (PFCs).
Technical Advantages and Competitive Barriers
Low Surface Tension (16–18 mN/m): Superior to ethanol (22 mN/m), enabling rapid wetting of hydrophobic fibers like polyester/nylon.
Volatility (Boiling Point 152℃): Completely volatilizes during drying, eliminating residual environmental risks.
Replaces traditional solvents (e.g., xylene, DMF) and meets:
EU REACH regulations (free of PBT/vPvB characteristics).
OEKO-TEX® Standard 100 certification.
Experimental Data & Case Studies
Applications in Waterproof Fabrics
Polyester fabric + 0.5% additive: Initial contact angle reaches 150°, remaining >140° after 50 washes (AATCC TM22).
Coating uniformity deviation <3% (measured by laser thickness gauge).
Outdoor Brand: Improved yield of waterproof fabrics by 12%, reduced customer complaint rate by 30%.
Applications in Medical Protective Clothing
Blood penetration resistance certified to ISO 16603 Level 4.
Air permeability increased by 15% (ASTM D737).
Leading Domestic Medical Enterprise: Extended service life of protective clothing by 20%.
Applications in Antistatic Workwear
Surface resistance reduced from 10¹²Ω to 10⁸Ω (ASTM D257).
Electronics Factory Workwear Supplier: Reduced electrostatic issues by 90%.
Preparation Process, Core Technologies, and Precautions
Preparation Processes
Raw Materials: Trimethylchlorosilane, hexamethyldisiloxane.
Procedure:
Hydrolyze trimethylchlorosilane in a reactor to generate trimethylsilanol.
Condense trimethylsilanol with hexamethyldisiloxane.
Purify via neutralization, water washing, drying, and vacuum distillation.
Raw Materials: Hydrogen-containing silicone oil, vinyltrimethoxysilane.
Procedure:
Perform hydrosilylation under catalyst to synthesize intermediates.
Hydrolyze and polycondense intermediates.
Obtain heptamethyltrisiloxane through filtration and purification.
Core Technologies
Key Controls:
Hydrolysis temperature (60–80°C), water dosage, and reaction rate.
Optimization of catalysts (e.g., acidic/basic) and condensation conditions (time, pH).
Achieves >90% yield and 99% purity via precise distillation.
Key Controls:
Catalyst selection (e.g., platinum-based) and reaction parameters (molar ratio, 1:1.05–1.2; temperature, 80–120°C).
Hydrolysis water content (controlled stepwise) and pH adjustment (6.5–7.5).
Ensures low byproduct formation and high selectivity.
Precautions
Packaging & Ordering
Packaging: 200kg/1000kg plastic drums (customizable).
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Basic Product Information Product Name: Heptamethyltrisiloxane Appearance: Colorless Transparent Liquid TYPICAL PROPERTIES Appearancecolorless transparent liquidpurity (GC),%>99 Molecular weight222.5 Physical Properties Colorless transparent liquid, high purity (≥99.9%), low volatility, non-residue. Chemical Propertie.
Basic Product Information Product Name: Heptamethyltrisiloxane Appearance: Colorless Transparent Liquid TYPICAL PROPERTIES Appearancecolorless transparent liquidpurity (GC),%>99 Molecular weight222.5 Physical Properties Colorless, odorless transparent liquid with adjustable volatility (completely volatilizes within 3-8 mi.
Basic Product Information Product Name: Heptamethyltrisiloxane Appearance: Colorless Transparent Liquid TYPICAL PROPERTIES Appearancecolorless transparent liquidpurity (GC),%>99 Molecular weight222.5 Physical Properties Appearance: Colorless transparent liquid. Boiling Point: 165–175°C. Volatility: Moderate evaporat.
Basic Product Information Product Name: Heptamethyltrisiloxane Appearance: Colorless Transparent Liquid TYPICAL PROPERTIES Appearancecolorless transparent liquidpurity (GC),%>99 Molecular weight222.5 Physical Properties Colorless transparent liquid Boiling point: 165–175°C Controlled volatility (complete volatilizat.