Methyl Hydrogen Silicone Fluid

Basic Product Information

• Product Name: Methyl hydrogen siloxane
• Appearance: Colorless to pale yellow transparent oily liquid.

TYPICAL PROPERTIES

Appearance	colorless transparent liquid
Viscosity (25℃),mm2/s	20-250
H% (wt)	0.04-1.45
Volatile content(150℃,3h),%	≤11

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Physical Properties

• Contact Angle: <20° (300% improvement in leaf surface spreadability).
• Rainfastness: >15 days (ASTM D5725 test standard).

Chemical Properties

• Si-H Bond Hydrolysis: Controlled hydrolysis of Si-H bonds generates silanol groups, enabling chemical bonding with plant surfaces.
• China Pesticide Adjuvant Registration (official regulatory approval).
• EU ECONEX Biostimulant Certification (sustainability compliance).
• Organic Farming Input Assessment (OFDC, organic compatibility validation).

Product Functions

• Synergistic Carrier:Deposition rate of agrochemicals increased to 85% (vs. ~40% for conventional formulations).
• Stress Resistance Barrier:Reduces transpiration intensity by 30-50% (validated by infrared thermography).
• Micronutrient Sustained Release:Bioavailability of silicon reaches 70-90% for enhanced plant uptake.
• Eco-Safety Profile:LD50 >5,000 mg/kg (classified as practically non-toxic).

Applications

• Field Crops:

Rice: Lodging resistance enhancement.

Wheat: Drought resistance improvement.

• Cash Crops:

Fruit Trees: Sunscald prevention.

Tea Plants: Quality enhancement (e.g., polyphenol retention).

• Protected Agriculture:

Greenhouses: Anti-fogging film for optimized light transmission.

Soilless Cultivation: Hydrophobic root zone management.

• Seed Treatment:

Film-Coating: Uniform seed coating for mechanized sowing.

Germination Promotion: Enhanced water/nutrient uptake during sprouting.

Core Advantages

Performance Dimension	Conventional Treatment	H₂-Silicone Oil Solution	Validation Method
Pesticide Utilization Rate	38–42%	79–85%	Fluorescence tracer method
Leaf Water Retention (Drought)	Wilting at 72 hours	Turgid for 168 hours	Controlled climate chamber simulation
Fruit Cracking Rate	23–35%	<8%	Statistical analysis of 10,000-acre orchards
Photosynthetic Efficiency	—	+29% net photosynthetic rate	LI-6400XT system measurement
Silicon Absorption	0.8–1.2 mg/g	2.5–3.8 mg/g	ICP-MS detection

Market Value

Core Application Fields & Market Drivers

(1) Pesticide Synergists (Core Market)

Mechanism:

Reduces pesticide solution surface tension, enhancing leaf spreadability and penetration.

Delays pesticide volatilization, extending residual efficacy (e.g., glyphosate + H₂-silicone oil boosts efficacy by 30%).

(2) Foliar Fertilizer & Biostimulant Carriers

Advantages:

Enhances foliar absorption of nutrients (e.g., zinc, boron), reducing leaching losses.

Compatible with biostimulants like humic acid and seaweed extracts.

Market Potential:

Global foliar fertilizer market to reach $3.5 billion by 2025, driven by silicon-based adjuvant adoption.

(3) Seed Coating & Stress Resistance Enhancement

Functions:

Forms a hydrophobic film to inhibit seed mold and improve germination rates.

Boosts drought tolerance (e.g., 20% higher survival rate for coated wheat seeds under drought).

Policy Drivers:

China’s Seed Industry Revitalization Initiative prioritizes high-performance seed coatings.

(4) Soil Amendment (Emerging Application)

R&D Focus:

Synergistic use with polyacrylamide (PAM) to reduce soil moisture evaporation.

Salt suppression in saline-alkali soils (experimental phase).

Regional Breakdown:

Asia-Pacific (China, India): Largest market (>50% share), driven by pesticide efficiency policies.

South America (Brazil): High demand from soybean and sugarcane cultivation.

Experimental Data & Case Studies

Comprehensive Stress Resistance Solution for Rice

• Technical Approach:

Seed Soaking Stage: Treat seeds with a 0.05% solution for 12 hours.

Tillering Stage: Apply a 0.1% concentration of the agent together with insecticides via aerial spraying.

Heading Stage: Spray a 0.15% concentration of the agent combined with fungicides on the leaves.

• Effect Comparison:

Lodging rate: 32% in the control group vs. 6% in the treatment group.

1000-grain weight: 24.3 grams in the control group vs. 28.7 grams in the treatment group.

Pesticide usage: 100% in the control group vs. 60% reduction in the treatment group.

• Project Case:

Applied in the 852 Farm of Heilongjiang State Farm Bureau across 30,000 mu (2,000 hectares), leading to a 14.6% yield increase.

Fog Elimination and Disease Prevention for Protected Agriculture

• Innovative Application:

Treat the inner wall of greenhouse films by spraying a 0.3% aqueous solution.

• Achieved Effects:

Fog elimination duration exceeds 20 days.

Incidence of gray mold disease reduced by 67%.

• Benchmark Customer:

Shandong Shouguang Vegetable Base reduced light supplementation energy consumption by 30% using this solution.

Preparation Methods, Core Technologies & Precautions

Preparation Methods

• Preparation Methods of Hydrogen-Containing Silicone Oil for Agricultural Use
• Hydrolysis-Polycondensation Method of Methyl Hydrogen Silicone Oil (Mainstream Process)

Raw Materials: Methyl hydrogen dichlorosilane (MeHSiCl₂), dimethyldichlorosilane (Me₂SiCl₂)

Process Steps:

Hydrolysis Reaction: Hydrolysis in a toluene/water system to generate hydroxyl-terminated prepolymers.

Polycondensation: Add concentrated sulfuric acid as a catalyst to adjust molecular weight (typically controlling viscosity at 50–500 mPa·s).

Neutralization and Water Washing: Neutralize acidity with NaHCO₃ to remove HCl byproducts.

Agricultural Applicability:

Low cost, suitable for large-scale production of pesticide adjuvants.

Strict control of residual chlorine content (<50 ppm) is required to avoid phytotoxicity.

(2) Siloxane Equilibration Method (High-Purity Route)

Raw Materials: Hexamethyldisiloxane (MM), methyl hydrogen cyclosiloxane (D₄ᴴ)

Catalysts: Tetramethylammonium hydroxide (TMAH) or phosphazene chloride

Characteristics:

Narrow molecular weight distribution of products, suitable for high-end seed coatings.

Chlorine-free residue but higher cost.

(3) Modified Hydrogen-Containing Silicone Oil (Functional Customization)

Epoxy Modification: Introducing epoxy groups to enhance compatibility with organic pesticides.

Polyether Modification: Grafting EO/PO segments to improve water solubility (for foliar fertilizers).

Amino Modification: Enhancing adsorption on seed surfaces.

Core Technical Breakthroughs in Agricultural Applications

(1) Low-Toxicity Process Control

Challenges: Residual chlorine and acid in traditional processes may affect crop growth.

Solutions:

Multi-stage water washing + adsorption purification: Using activated carbon/molecular sieves to remove trace impurities.

Chlorine-free silane route: Replacing chlorosilanes with alkoxysilanes (e.g., MeHSi(OMe)₃).

(2) Ultra-Low Surface Tension Technology

Requirement: Pesticide sprays need rapid spreading (surface tension <25 mN/m).

Implementation Methods:

Regulating Si-H bond content (0.5–1.2%) to optimize hydrophobic-hydrophilic balance.

Blending with nonionic surfactants (e.g., alkyl polyglycosides).

(3) Sustained-Release Film-Forming Technology (Seed Coating)

Key Technologies:

Micro-emulsification process: Particle size <100 nm to improve film uniformity.

Crosslinker selection: UV curing or oxidative crosslinking (e.g., dicumyl peroxide).

(4) Environmental Degradability Optimization

Biodegradable silicone oil:

Introducing ester bonds (e.g., siloxane-polycaprolactone copolymers).

Photodegradable design (containing benzophenone structures).

Precautions

Prohibited Situations:

During the bee pollination period in the flowering stage

Under extreme drought (soil water content <30%)

Best Practices:

Application from 9–11 a.m. on sunny days

Adding anti-drift agents for drone operations

Packaging & Ordering

Packaging: 200kg/1000kg plastic drums (customizable).