METHYL HYDROGEN SILOXANE FOR AGRICULTURE - Methyl Hydrogen Silicone Fluid Factory

Methyl hydrogen siloxane represents a breakthrough in agricultural adjuvant technology, delivering exceptional performance in crop protection applications. This specialized silicone-based additive acts as a super-spreading agent that dramatically enhances the efficacy of pesticides, herbicides, and fungicides through its unique surface modification capabilities.

The compound’s extremely low surface tension (16-18 mN/m) enables complete wetting of even the most challenging plant surfaces, including waxy leaves and hydrophobic structures. This ensures uniform coverage and maximum adhesion of active ingredients, significantly reducing product runoff and improving rain fastness. By facilitating superior stomatal penetration, it enhances the absorption of systemic products and helps overcome resistance issues in weeds and pests.

Methyl hydrogen siloxane allows for substantial reduction in chemical usage—typically 30-50%—while maintaining or even improving overall efficacy. Its compatibility with most agricultural formulations and rapid biodegradation profile make it an environmentally responsible choice for modern farming operations.

This advanced adjuvant technology provides farmers with a powerful tool to optimize crop protection strategies, reduce environmental impact, and maintain sustainable agricultural productivity.

Basic Product Information

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

TYPICAL PROPERTIES

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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

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).