What Is Polyalkyleneoxide Modified Heptamethyltrisiloxane? Definition & Properties
Polyalkyleneoxide Modified Heptamethyltrisiloxane is a high-performance organosilicon surfactant modified with polyether groups, widely known as trisiloxane super spreader. It features a unique "siloxane backbone + polyalkyleneoxide side chain" molecular structure, which greatly reduces the surface tension of water-based solutions. Different from traditional hydrocarbon surfactants, this modified trisiloxane can achieve ultra-low surface tension and excellent wetting, spreading, penetrating and emulsifying performance even at extremely low dosages. It is non-ionic, low-foaming, environmentally friendly, and compatible with most pesticides, fertilizers and industrial water-based formulas, making it a core auxiliary agent for modern agricultural spraying and industrial surface treatment.
Commonly recognized as Polyether Modified Heptamethyltrisiloxane or Trisiloxane Polyether Surfactant in the global market, this chemical boasts superior spreadability on hydrophobic crop leaves, plastic, metal and coating surfaces. It effectively solves the problems of liquid shrinkage, poor adhesion and uneven coverage, significantly improving the utilization rate of chemicals and the overall effect of spraying and coating processes.
Polyalkyleneoxide Modified Heptamethyltrisiloxane Synonyms, Formula
1. Academic & Technical Synonyms: Polyether Modified Heptamethyltrisiloxane, Trisiloxane Polyether Surfactant, Polyalkyleneoxide Modified Trisiloxane
Commercial Common Names: Silicone Super Spreader, Agricultural Silicone Adjuvant, Modified Trisiloxane Surfactant
CAS Standard Name: 2-[Acetoxy(polyethyleneoxy)propyl]heptamethyltrisiloxane
2. Basic Chemical Information
CAS Number: 125997-17-3/67674-67-3/ 27306-78-1
Type: Non-ionic Organosilicon Surfactant
Appearance: Colorless or pale yellow transparent liquid
Core Feature: Ultra-low surface tension, super spreading, low foam, high permeability
3. Core Technical Parameters
Surface Tension: 25-30 mN/m (low dosage)
Foam Performance: Low foam & quick defoaming
Compatibility: Compatible with acidic, neutral and partial alkaline formulas Main
Application Grade: Agricultural grade, Industrial grade
Specification:
Test Items | Standard |
Appearance | Colorless or light amber liquid |
Efficiency content (%) | 100 |
Refractive Index(25℃) | 1.390~1.410 |
Viscosity (25℃, mm2/s) | 15~40 |
Surface tension (0.1%aq.) | 20.0~21.0 mN/m |
Cloud point (1%in water solution) | ＜10℃ |
Key Advantages of Modified Heptamethyltrisiloxane Surfactant
Polyalkyleneoxide Modified Heptamethyltrisiloxane has irreplaceable advantages over traditional surfactants. Firstly, it provides ultra-efficient spreading and wetting ability, enabling liquid droplets to spread rapidly on hydrophobic leaf surfaces and complex industrial surfaces without shrinkage or rolling off, improving chemical coverage rate. Secondly, it has strong permeability, helping pesticides and functional solutions penetrate leaf cuticles and surface gaps to enhance efficacy. Thirdly, it maintains low-foam performance during use, avoiding excessive foam interference with spraying and industrial mixing processes. In addition, it features good chemical stability, wide pH adaptability, low dosage, high efficiency and environmental friendliness, meeting global agricultural and industrial green production standards.
Agricultural Applications
1：Modified Heptamethyltrisiloxane Surfactant Spreading Adjuvant for Pesticide & Fertilizer Spraying
As a professional agricultural silicone adjuvant, Polyalkyleneoxide Modified Heptamethyltrisiloxane is widely added to insecticides, fungicides, herbicides and foliar fertilizers. It can rapidly reduce the surface tension of spray liquid, eliminate droplet shrinkage, and realize uniform spreading on crop leaves, stems and waxy hydrophobic surfaces. It effectively improves the adhesion and deposition of pesticides and fertilizers, reduces liquid loss caused by wind and rain wash, and significantly improves the absorption and utilization efficiency of agrochemicals, reducing pesticide waste and environmental pollution.
2：Polyether Modified Trisiloxane Improve Foliar Absorption & Rainfastness for Crops
This modified trisiloxane surfactant has excellent penetrating performance, which can help active ingredients quickly penetrate the crop leaf wax layer and epidermal tissue, speed up crop absorption, and improve the quick-acting and lasting effect of pesticides and fertilizers. At the same time, it forms a uniform protective film on the leaf surface, enhancing the rain resistance of spray chemicals, avoiding efficacy reduction caused by sudden rainfall, and ensuring stable crop protection and nutrient supply in complex weather conditions.
Polyether modified trisiloxane Industrial Applications
1:Polyether modified trisiloxane Wetting & Leveling Agent for Coatings & Inks
In the coating, ink and water-based paint industry, Polyalkyleneoxide Modified Heptamethyltrisiloxane serves as an efficient wetting and leveling agent. It effectively reduces the surface tension of water-based coating systems, solves common problems such as shrinkage cavities, orange peel, pinholes and poor leveling on metal, plastic, glass and wood surfaces, improves coating uniformity and smoothness, and enhances the overall finish and adhesion of the coating layer.
2:Trisiloxane Polyether Surfactan Industrial Cleaning & Water-Based Formula Additive
The product is suitable for various water-based industrial cleaning agents, detergent formulas and emulsification systems. With excellent wetting, emulsifying and dispersing capabilities, it can quickly infiltrate dirt gaps, disperse oil stains and impurities, and improve cleaning efficiency. Its low-foam feature is very suitable for mechanical circulating cleaning and industrial continuous production processes, avoiding foam overflow and process interruption caused by high-foam surfactants.
3：Silicone Polyether Copolymer Textile & Leather Surface Treatment Auxiliary
In textile and leather processing, this trisiloxane polyether surfactant is used as a wetting and penetrating auxiliary agent. It improves the permeability of dyeing liquid, finishing agent and treatment agent on fiber and leather surfaces, makes the treatment agent distribute evenly, improves dyeing uniformity and finishing effect, and enhances the softness, smoothness and surface finish of textiles and leather products.
Polyalkyleneoxide Modified Heptamethytrisloxane Instructions:
For direct addition in pesticide formulations, the components can be added directly as a formulation. It is stable in neutral aqueous formulation (pH=7), but degrades rapidly in acidic or alkaline formulations. Super wetting agents can be mixed before use to improve the biological properties of the spray. It can be added to the pesticide formula or to the tank spray. Add pesticide formula: It is recommended to add 0.5-8% of the pesticide stock solution. It is recommended to adjust the pH of the pesticide formula to 6-8. Add to the tank spray method: Usually add 50 grams of H-77 (4000 times) per 200 kg of spray.
Under normal circumstances, different application fields and corresponding addition parameters are as follows:
Plant growth regulator | 0.025%～0.05% |
Herbicide | 0.025%～0.15% |
Insecticide | 0.025%～0.1% |
Fungicide | 0.015%～0.05% |
Fertilizer and microelement | 0.015～0.1% |
Packing and Storage
Packing In 200kg net Iron drum or 1000kg IBC drum
Storage Avoid contact with substances that can trigger its chemical reaction, such as acid, alkali, oxidant, etc., to prevent denaturation. Keep tightly closed. Store in a cool dry place
Safety Information
Non-hazardous for air, sea and road freight.
