Polyurethane Fiber Sizing Agent Composition for Storage Stability
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Solution Overview
Problem
Existing glass fiber sizing agents exhibit excellent sizing properties but have inadequate storage stability of the aqueous dispersion of polyurethane resin, limiting production flexibility.
Innovation Solution
A fiber sizing agent comprising an aqueous dispersion of a polyurethane resin, where the resin includes a polyol component without sulfonic acid or sulfonate groups, a polyisocyanate component, and a compound with sulfonic acid or sulfonate groups and active hydrogen groups, with a specific ratio of polyether polyol to other components for enhanced stability and sizing properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a glass fiber sizing agent uses a polyurethane resin with conventional composition (including polyamine components and sulfonic acid groups), then excellent sizing properties are achieved, but the storage stability of the aqueous dispersion deteriorates
Solution Approach 1:
The invention changes the chemical composition parameters of the polyurethane resin by eliminating polyamine components and sulfonic acid groups, and by controlling the polyol component ratios (polyester polyol:polyether polyol = 2.0-8.0 mass ratio). This parameter optimization resolves the contradiction by achieving both excellent sizing properties and improved storage stability of the aqueous dispersion.
Solution Approach 2:
The invention uses a composite polyol system combining polyester polyol and polyether polyol in specific ratios, along with polyisocyanate and compounds containing sulfonic acid/sulfonate groups with active hydrogen. This composite material approach allows the resin to simultaneously achieve good sizing properties and storage stability that cannot be obtained with single-component systems.
2Stability of the object's composition
If the polyether polyol content is increased to improve storage stability, then the storage stability of the aqueous dispersion improves, but the sizing properties may deteriorate
Solution Approach 1:
The invention optimizes the polyether polyol content parameter within a specific range (10-30 parts by mass per 100 parts total polyol) and controls the mass ratio of polyester polyol to polyether polyol between 2.0-8.0. This precise parameter control ensures that storage stability is improved while sizing properties are maintained at excellent levels, resolving the contradiction between these two properties.
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 proposed solution achieves excellent sizing properties for glass fibers while significantly improving the storage stability of the aqueous polyurethane resin dispersion, thereby enhancing production flexibility.
Implementation Method 1
the polyurethane resin includes, as constituent components, a polyol (a) component, a polyisocyanate (b) component, and a compound (c) component containing at least one of a sulfonic acid group or a sulfonate group and containing an active hydrogen group
Data Source
AI summary
Provided is a technique for achieving sizing properties and also achieving a storage stability of an aqueous dispersion of a polyurethane resin that is used in a fiber sizing agent. A fiber sizing agent includes an aqueous dispersion of a polyurethane resin, and the polyurethane resin includes, as constituent components, a polyol (a) component containing no sulfonic acid group or sulfonate group; a polyisocyanate (b) component; and a compound (c) component containing at least one of a sulfonic acid group or a sulfonate group and containing an active hydrogen group. The polyol (a) component includes a polyester polyol (a1) and a polyether polyol (a2), and the component of the polyether polyol (a2) is present in an amount of 10 parts by mass or greater and 30 parts by mass or less per 100 parts by mass of the total amount of the polyol (a) component, the polyisocyanate (b) component, and the compound (c) component.