Water-Based Primer Composition for Glass Bonding

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Solution Overview

Problem

Current adhesion promoters for industrial adhesive bonding operations often rely on organic solvents, which pose environmental and health risks, and water-based alternatives face issues with solubility, evaporation rates, and wetting properties, necessitating a composition that is environmentally friendly, easy to apply, and compatible with standard industrial processes.

Innovation Solution

A water-based primer composition comprising a hydrosylate of alkoxysilyl amine, a surfactant, and organotitanate or organozirconate, combined with optional fluorescing compounds, that can be applied using standard equipment and processes, enhancing adhesion without the need for organic solvents.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If organic solvents are used in adhesion promoters, then adhesion promotion effectiveness is improved, but environmental and health risks increase

Engineering Contradiction:
Improveadhesion promotion effectivenessVSAvoidenvironmental and health risks
Core Design Contradiction:
ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent changes the solvent parameter from organic to water-based, maintaining adhesion effectiveness while eliminating harmful organic solvent emissions. This is achieved by formulating a water-based primer composition containing alkoxysilyl amine, surfactant, and organometallic compounds that can function effectively in aqueous environments.

Inventive Principle:
Principle #35Parameter changes

Solution Approach 2:

The patent replaces expensive organic solvents requiring ventilation infrastructure with water, a free and environmentally benign solvent. This eliminates the need for costly ventilation and capturing equipment while reducing human exposure risks.

Inventive Principle:
Principle #27Cheap short-living objects (Disposable)

2Object-affected harmful factors

If water is used as solvent in adhesion promoters, then environmental friendliness is improved, but evaporation rate decreases

Engineering Contradiction:
Improveenvironmental friendlinessVSAvoidevaporation rate
Core Design Contradiction:
Object-affected harmful factorsVSSpeed

Solution Approach 1:

The patent modifies the water-based composition by adding surfactants and organometallic compounds that adjust the evaporation characteristics. The surfactant reduces surface tension while the organometallic compounds facilitate controlled evaporation, achieving a balance between environmental friendliness and processing speed.

Inventive Principle:
Principle #35Parameter changes

Solution Approach 2:

The patent introduces surfactant as an intermediary substance that mediates between water and the substrate surface. The surfactant enhances wetting properties and facilitates controlled evaporation, enabling water-based primer to perform effectively despite water's naturally slow evaporation rate.

Inventive Principle:
Principle #24Intermediary (Mediator)

3Object-affected harmful factors

If water is used as solvent in adhesion promoters, then environmental friendliness is improved, but solubility of ingredients decreases

Engineering Contradiction:
Improveenvironmental friendlinessVSAvoidsolubility of ingredients
Core Design Contradiction:
Object-affected harmful factorsVSStability of the object's composition

Solution Approach 1:

The patent creates a composite water-based formulation combining alkoxysilyl amine, surfactant, and organometallic compounds. This composite approach allows each component to contribute its solubility characteristics, achieving a stable homogeneous mixture that maintains environmental friendliness while ensuring all ingredients remain dissolved or dispersed in water.

Inventive Principle:
Principle #40Composite materials

Solution Approach 2:

The surfactant acts as an intermediary that enhances the solubility and dispersion of hydrophobic components in the water-based system. It forms micellar structures that solubilize organic components, maintaining composition stability without requiring organic solvents.

Inventive Principle:
Principle #24Intermediary (Mediator)

4Object-affected harmful factors

If water is used as solvent in adhesion promoters, then environmental friendliness is improved, but wetting properties on surfaces deteriorate

Engineering Contradiction:
Improveenvironmental friendlinessVSAvoidwetting properties
Core Design Contradiction:
Object-affected harmful factorsVSReliability

Solution Approach 1:

The surfactant serves as a critical intermediary that reduces water's high surface tension and improves wetting properties on various substrates. It enables the water-based primer to spread and adhere effectively to surfaces that would otherwise be difficult to wet with aqueous solutions.

Inventive Principle:
Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent modifies the surface tension parameter of water by incorporating surfactant, transforming it from a poor wetting agent to an effective primer solvent. This parameter change enables environmental friendliness to be maintained while achieving reliable wetting and adhesion promotion.

Inventive Principle:
Principle #35Parameter changes

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 composition effectively promotes adhesive bonding on various substrates, including glass and plastic, while being environmentally friendly and compatible with standard industrial processing speeds, ensuring durable and efficient bonding.

Implementation Method 1

b) a surfactant, preferably in an amount of from 0.05 to 1.0 weight percent based on the total weight of the water based primer composition

Methodology Applied
Scientific EffectSurface tension reduction: Surfactant

Implementation Method 2

c) an organotitanate, organozirconate, or combinations thereof, preferably in an amount of from 0.001 to 3.0 weight percent and/or the organozirconate is present in an amount of from 0.001 to 2.0 weight percent

Methodology Applied
Scientific EffectChemical bonding: Chemical Bonding

Implementation Method 3

a) a hydrosylate of one or more alkoxysilyl amine

Methodology Applied
Scientific EffectHydrolysis: Hydrolysis

Implementation Method 4

allowing a major portion of the water in the composition to evaporate off of the surface of the first substrate

Methodology Applied
Scientific EffectEvaporation: Evaporation

Data Source

PatentEP2809737B1Water based primer composition for bonding glass into a structure
Publication Date: 2018.06.06 DOW GLOBAL TECHNOLOGIES LLC
  • EP2809737B1 patent drawing
  • EP2809737B1 patent drawing
  • EP2809737B1 patent drawing

AI summary

The present invention is directed to a unique composition and method for promoting adhesion of substrates to adhesives. The solution comprises a water based primer composition comprising: a) a hydrosylate of one or more alkoxysilyl amine; b) a surfactant; c) an organotitanate, organozirconate, or combinations thereof; d) optionally a fluorescing compound; and e) water. Preferably the organotitanate or organozirconate correspond to formula (I): wherein M is titanium or zirconium and R8 comprises hydrocarbyl ligands, which may optionally contain one or more heteroatoms comprising oxygen, nitrogen, sulfur or phosphorus, optionally two or more of R8 may combine to form a cylic ring structure. Preferably the composition and method of the invention can be used to bond glass or plastic coated with an abrasion resistant coating, in particular a window for a vehicle, to other substrates such as metal or plastics.