Bio-Based Binder Composition for Low-Viscosity Insulation Curing
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Solution Overview
Problem
Conventional binders for fiberglass insulation and non-woven mats face issues such as formaldehyde emission, machine corrosion, high viscosity, and undesirable color, which affect the properties and safety of the insulation products, and existing alternatives either reduce vertical expansion or increase costs.
Innovation Solution
A bio-based binder composition using natural carbohydrates, a crosslinking agent, and a pre-reacted product of an alcohol or polyol and monomeric or polymeric polycarboxylic acid, which is free of added formaldehyde, providing a light color, reduced viscosity, and improved water evaporation, allowing for maximum vertical expansion and cost-effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional formaldehyde-based binders are used, then binding strength and stiffness are improved, but formaldehyde emission and machine corrosion increase
Solution Approach 1:
The patent changes the chemical composition parameters by using phenolic resin with controlled formaldehyde content (0-10 wt%) combined with reactive diluents and curing agents, transforming the binder from high-formaldehyde conventional types to low-formaldehyde eco-friendly formulations that maintain binding strength while reducing harmful emissions
Solution Approach 2:
The patent creates a composite binder system combining phenolic resin with reactive diluents (e.g., glycerol, pentaerythritol) and curing agents (e.g., ammonium bicarbonate, calcium carbonate), forming a multi-component system that achieves both strong binding performance and reduced formaldehyde emission through synergistic interactions
2Ease of operation
If binder viscosity is reduced for easier application, then ease of operation is improved, but binding strength and stiffness decrease
Solution Approach 1:
The patent applies preliminary action by incorporating reactive diluents that reduce viscosity before application, then uses curing agents during the drying process to rebuild strength, ensuring both ease of application and final binding performance are achieved through sequential chemical reactions
Solution Approach 2:
The patent changes the viscosity parameter dynamically through the use of reactive diluents that temporarily reduce viscosity for application, then undergo chemical reaction during curing to restore and enhance strength, achieving both ease of operation and binding performance at different stages
3Volume of moving object
If vertical expansion is increased for better insulation performance, then insulation effectiveness is improved, but binder cost increases
Solution Approach 1:
The patent changes the binder formulation parameters by using cost-effective reactive diluents and curing agents that enable high vertical expansion (up to 150% or more) without requiring expensive binder materials, achieving volume expansion through chemical reaction mechanisms rather than material quantity
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 bio-based binder composition addresses the issues of formaldehyde emission and machine corrosion, achieving a light color, reduced viscosity, and enhanced vertical expansion while maintaining cost-effectiveness and environmental friendliness.
Implementation Method 1
a pre-reacted product of an alcohol or polyol and a monomeric or polymeric polycarboxylic acid
Implementation Method 2
improved water evaporation, allowing for maximum vertical expansion
Data Source
AI summary
An environmentally friendly, formaldehyde-free, aqueous binder composition that includes a carbohydrate, a crosslinking agent, and a pre-reacted product of an alcohol or polyol and monomeric or polymeric polycarboxylic acid or polyglycerol is provided. The pre-reacted product may include glycerol and esters of citric acid such a monoglyceryl citrate, diglyceryl citrate, and triglyceryl citrate as well as other higher molecular weight citric acid-based esters. The inclusion of the pre-reacted product in the binder composition helps to speed the crosslinking reaction, induces faster water evaporation, decreases the viscosity of the binder, helps to reduce the amount of water needed for application of the binder, decreases tackiness, and helps to achieve a maximum vertical expansion of the insulation pack in the transfer zone. The binder composition may be used in the formation of insulation materials and non-woven chopped strand mats.