Pre-Reacted Water-Soluble Binder for Stable Formaldehyde-Free Curing
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Solution Overview
Problem
Current formaldehyde-free binders, such as carbohydrate-based and acrylic acid-poly(vinyl alcohol) binders, face issues like high production costs, lower reaction rates, and compatibility challenges with traditional phenol formaldehyde binder systems, leading to problems with storage and shipment due to quick gelling and recrystallization.
Innovation Solution
A water-soluble pre-reacted binder composition is developed by reacting carbohydrates with nitrogen-containing components, resulting in a composition with intermediate reaction species, reduced viscosity, and increased molecular weight, which can be stored and shipped more stably and efficiently, and further crosslinked to form a polymeric binder.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If carbohydrate-based binders are used as formaldehyde-free alternatives, then environmental acceptability is improved, but reaction rate deteriorates
Solution Approach 1:
The patent modifies the chemical parameters of carbohydrate-based binders by pre-reacting them with nitrogen-containing components to form pre-polymers with altered molecular weight and reactivity characteristics, thereby improving reaction rate while maintaining formaldehyde-free properties
Solution Approach 2:
The invention creates composite binder systems by combining carbohydrate components with nitrogen-containing components through pre-reaction, forming a new material class that exhibits both environmental compatibility and enhanced reactivity
2Quantity of substance
If pre-reacted binder composition is concentrated for efficient shipping, then transportation cost is reduced, but storage stability deteriorates due to quick gelling
Solution Approach 1:
The patent performs preliminary pre-reaction of carbohydrate components with nitrogen-containing components to form stable pre-polymers that can be concentrated and stored without immediate gelling, enabling efficient shipping while maintaining storage stability
Solution Approach 2:
The pre-reacted intermediate products serve as stable intermediaries that prevent direct interaction between highly reactive components, allowing concentrated storage without premature crosslinking and gelling
3Strength
If acrylic acid and poly(vinylalcohol) based binders are used, then binding performance is improved, but production cost increases
Solution Approach 1:
The patent employs inexpensive carbohydrate-based raw materials that can be readily converted into effective binders through pre-reaction, replacing expensive petroleum-derived acrylic acid and poly(vinylalcohol) while achieving comparable binding performance
4Object-affected harmful factors
If traditional phenol formaldehyde binders are replaced with formaldehyde-free alternatives, then environmental acceptability is improved, but compatibility with established processes deteriorates
Solution Approach 1:
The patent adjusts the reactivity parameters of formaldehyde-free binders through pre-reaction with nitrogen-containing components, tuning the curing characteristics to match traditional phenol formaldehyde process conditions and achieve compatibility with established manufacturing processes
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 pre-reacted binder composition improves cure times, bond strength, and stability, reducing fading and microbial degradation, while maintaining compatibility with established processes and environmental acceptability.
Implementation Method 1
reacting a carbohydrate component and a nitrogen-containing component
Implementation Method 2
further crosslinked to form a polymeric binder
Data Source
AI summary
The present invention relates to a water-soluble pre-reacted binder composition, a method of its manufacture, a use of said pre-reacted binder composition, a method of manufacturing a collection of matter bound by a polymeric binder, a binder solution or dispersion comprising said pre-reacted binder composition, as well as products comprising the pre-reacted binder composition in a cured state.