Soy Protein Binder Viscosity Control for Glass Fiber Mat Uniformity
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Solution Overview
Problem
The construction industry faces challenges with low viscosity binder compositions used in glass fiber mats, leading to inadequate binder coverage and reduced tensile strength, especially under hot and humid conditions, due to the migration of binders and difficulties in process control.
Innovation Solution
Soy protein and carbohydrate-containing binder compositions with nitrogen-containing crosslinking agents are developed to increase viscosity and improve tensile strength, including optional thickening agents to enhance rheological properties and ensure uniform binder distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the viscosity of binder compositions using renewable feedstocks is kept low, then the binder can be sprayed in low concentrations and quickly dried and cured, but the low viscosity creates difficulties in the production of glass fiber mats where too much free-flowing binder migrates to the bottom of the mat leaving the fibers on top with too little binder coverage
Solution Approach 1:
The patent modifies the rheological parameters of the binder composition by incorporating specific additives that change the viscosity characteristics. This allows the binder to maintain low viscosity for rapid drying and curing while preventing excessive migration to the bottom of the mat, thus achieving uniform binder coverage throughout the glass fiber mat structure.
Solution Approach 2:
The patent creates a composite binder system combining renewable feedstocks with specific additives and thickeners. This composite formulation provides both the low viscosity needed for rapid processing and the binding strength required for uniform coverage, resolving the contradiction between productivity and manufacturing precision.
2Stability of the object's composition
If the wt. % solids in the binder is increased to increase viscosity, then binder migration is reduced, but this leads to difficulties for the control of the mat weight and especially LOI, and may result in a non-uniform coating of the mat
Solution Approach 1:
Instead of increasing solids content to raise viscosity, the patent changes the rheological parameters by adding specific additives and thickeners that increase viscosity at lower solids concentrations. This approach maintains binder stability while avoiding the problems of excessive mat weight and non-uniform coating associated with high solids content binders.
Solution Approach 2:
The patent introduces intermediary substances (additives and thickeners) that mediate between the binder components and the glass fiber mat. These intermediaries control the binder's flow characteristics and adhesion properties, enabling uniform coating and proper mat weight control while maintaining adequate viscosity to prevent migration.
3Strength
If soy protein is added to increase viscosity and improve tensile strength, then binder coverage and tensile strength are improved, but the formulation complexity increases
Solution Approach 1:
The patent selects soy protein as a multi-functional additive that simultaneously provides viscosity enhancement, improved tensile strength, and better binder coverage. By using a single ingredient that performs multiple functions, the patent reduces formulation complexity compared to using multiple separate additives to achieve the same performance goals.
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 soy-containing binder compositions effectively increase viscosity, leading to improved tensile and tear strength, and delamination strength in glass fiber mats, while maintaining acceptable hot/wet retention, addressing the issues of binder migration and coverage.
Implementation Method 1
The binder compositions may include one or more nitrogen-containing crosslinking agents that polymerize into a water-insoluble glass fiber binder when cured
Implementation Method 2
The binder compositions may also optionally include one or more thickening agents to further increase viscosity
Data Source
AI summary
Soy protein and carbohydrate containing binder compositions are described. The binder compositions may include a carbohydrate, a nitrogen-containing compound, and a soy protein. The binder compositions may also optionally include thickening agents such as modified celluloses and polysaccharides.