Polysiloxane Deposition Aid for Crop Spray Adhesion and Spreading

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Solution Overview

Problem

Existing agricultural adjuvants such as crop oil concentrates and methylated seed oil concentrates do not adequately enhance the spreading and adhesion properties of agrochemicals on plant surfaces, despite the use of surfactants.

Innovation Solution

Incorporating low molecular weight polysiloxanes, preferably polydimethylsiloxanes with viscosities below 50 cSt at 25°C, into agricultural compositions to improve adhesion and spreading properties, combined with optional oils and surfactants.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional crop oil concentrates and methylated seed oil concentrates with surfactants are used, then the formulation can adhere to plant surfaces and spread over an area, but the adhesion and spreading properties are not adequately enhanced

Engineering Contradiction:
Improveadhesion propertyVSAvoidspreading property
Core Design Contradiction:
ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent combines polysiloxane (silicone oil) with traditional crop oil concentrates or methylated seed oil concentrates to create a composite adjuvant system. This composite material integrates the adhesion-enhancing properties of polysiloxane with the spreading capabilities of traditional oil-based surfactants, achieving synergistic improvement in both adhesion and spreading properties that neither component can achieve alone.

Inventive Principle:
Principle #40Composite materials

Solution Approach 2:

The patent modifies the physical and chemical parameters of the adjuvant system by incorporating polysiloxane with specific molecular weights and viscosities. This changes the surface tension, contact angle, and rheological properties of the formulation, enabling enhanced adhesion to plant surfaces while maintaining or improving spreading characteristics beyond what traditional surfactants can achieve.

Inventive Principle:
Principle #35Parameter changes

2Area of stationary object

If the same amount of formulation is applied to cover a larger area of the plant, then the coverage is improved, but the adhesion and spreading properties need further enhancement beyond traditional adjuvants

Engineering Contradiction:
Improvecoverage areaVSAvoidadhesion property
Core Design Contradiction:
Area of stationary objectVSReliability

Solution Approach 1:

The composite adjuvant system combines polysiloxane with traditional oil-based surfactants to achieve synergistic effects. The polysiloxane component provides exceptional adhesion through its molecular structure and surface properties, while the traditional surfactant package maintains spreading capability, allowing the formulation to cover larger areas without compromising adhesion.

Inventive Principle:
Principle #40Composite materials

Solution Approach 2:

The patent creates different functional zones within the formulation by combining materials with complementary properties. The polysiloxane provides localized adhesion enhancement at the droplet-substrate interface, while the traditional surfactant package handles the bulk fluid dynamics and spreading behavior, allowing optimized performance across different spatial scales.

Inventive Principle:
Principle #3Local quality

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The compositions exhibit significantly improved droplet adhesion and spreading on plant surfaces, exceeding the performance of traditional formulations by 10-50% without reducing dynamic surface tension.

Implementation Method 1

The surfactants, in addition to oil emulsification, can improve spray deposition properties by reducing the surface tension of the dispersion or emulsion and thereby enhance droplet adhesion on foliar surfaces

Methodology Applied
Scientific EffectSurface tension reduction: Surface Tension

Implementation Method 2

The polysiloxane serves to significantly improve the adhesion and/or spreading of the sprayed agricultural composition droplets on vegetation

Methodology Applied
Scientific EffectAdhesion: Adhesive

Implementation Method 3

Crop oil concentrates and methylated seed oil concentrates generally contain surfactant packages that are designed to aid in emulsification and deposition properties

Methodology Applied
Scientific EffectEmulsification: Emulsion

Data Source

PatentUS12538920B2Agricultural fluid deposition aid
Publication Date: 2026.02.03 MOMENTIVE PERFORMANCE MATERIALS INC
  • US12538920B2 patent drawing
  • US12538920B2 patent drawing
  • US12538920B2 patent drawing

AI summary

A deposition aid is provided, comprising a low molecular weight, low viscosity polysiloxane, combined with a crop oil concentrate or esterified seed oil concentrate. Combinations including the modified silicone can improve spreading and/or adhesion to foliage. Adding about 5% to about 20% of the modified silicone can provide more than a proportional increase in spreading and/or adhesion.