Pre-Reacted Binder Composition for Faster 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, slower reaction rates, and compatibility challenges with traditional phenol formaldehyde binder systems, which affect their suitability for various industrial applications.
Innovation Solution
A water-soluble pre-reacted binder composition is developed by reacting carbohydrates with nitrogen-containing components, resulting in a composition with high solid content and improved stability, which can be stored and shipped without gelling or recrystallization, and further crosslinked to form a polymeric binder with enhanced properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If formaldehyde-free binders (carbohydrate-based or acrylic acid-poly(vinyl alcohol)) are used to replace phenol formaldehyde binders, then environmental acceptability and sustainability are improved, but production cost increases and reaction rate decreases
Solution Approach 1:
The patent uses composite binder systems combining carbohydrate-based binders with polyol-polyisocyanate additives. This composite approach leverages the environmental benefits of carbohydrate binders while the polyol-polyisocyanate component accelerates the reaction rate and improves curing performance, effectively resolving the contradiction between environmental acceptability and productivity.
2Object-affected harmful factors
If carbohydrate-based binders are used as formaldehyde-free alternatives, then environmental sustainability is improved, but the binder requires substantially different curing conditions from traditional phenol formaldehyde systems
Solution Approach 1:
The patent modifies the curing parameters by introducing polyol-polyisocyanate additives that enable carbohydrate-based binders to cure under conditions more similar to traditional phenol formaldehyde systems. This parameter adjustment allows the use of environmentally friendly binders while maintaining compatibility with existing manufacturing processes and equipment.
3Object-affected harmful factors
If acrylic acid-poly(vinyl alcohol) binders are used as formaldehyde-free alternatives, then formaldehyde-free properties are achieved, but the binders exhibit lower reaction rates requiring prolonged cure times or increased cure temperatures
Solution Approach 1:
The patent introduces polyol-polyisocyanate compounds as intermediary substances that facilitate the curing process of formaldehyde-free binders. These intermediaries act as catalysts or reaction promoters that accelerate the crosslinking reaction, thereby reducing cure time without requiring increased temperatures or sacrificing the formaldehyde-free property.
4Stability of the object's composition
If pre-reacted binder composition with high solid content is developed, then stability during storage and shipping is improved, but the complexity of the binder composition increases
Solution Approach 1:
The patent performs pre-reaction between carbohydrate-based binders and polyol-polyisocyanate compounds before final application. This preliminary action creates a pre-reacted binder composition that is more stable during storage and shipping, while the modular nature of the pre-reaction allows for controlled complexity management through standardized formulation procedures.
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 offers improved cure times, bond strength, and stability, reducing microbial degradation and fading, while maintaining compatibility with established processes and environmental acceptability.
Implementation Method 1
the reaction product(s) of (i) at least one carbohydrate component, and (ii) at least one nitrogen-containing component
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.