Optical Brightener Premix for Homogeneous Polymer Dispersion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing polymeric compositions, such as silicone compositions, often have optical brighteners like 2,5-thiophenediylbis(5-tert-butyl-1,3-benzoxazole) that are not homogeneously distributed, leading to particle formation which affects appearance and can clog nozzles during dispensing due to low solubility.
Innovation Solution
Dissolving optical brighteners in a solvent, specifically polyalkoxy-silicon compounds like glycidyl 3-(trimethoxysilyl)propyl ether (GLYMO), before adding them to the polymeric composition to create a premix blend, ensuring homogeneous distribution and preventing particle formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If optical brighteners are directly added to polymeric compositions, then the composition contains UV tracer for detection, but the optical brightener exists as micron-sized particles affecting appearance and causing nozzle clogging
Solution Approach 1:
The patent introduces a solvent as an intermediary substance to dissolve the optical brightener before incorporating it into the polymeric composition. This solvent acts as a mediator that enables uniform distribution of the optical brightener throughout the polymer matrix, preventing particle formation while maintaining UV tracer functionality. The solvent temporarily carries the optical brightener in dissolved state during the mixing process.
Solution Approach 2:
The patent changes the physical state of the optical brightener from undissolved particles to dissolved molecular state by altering the solvent parameters (choosing appropriate solvents like esters, ketones, or alcohols). This parameter change from solid particles to dissolved state eliminates the homogeneity problem while preserving the UV detection capability.
2Reliability
If optical brighteners are directly added to polymeric compositions, then the composition contains UV tracer, but the optical brightener forms particles that clog nozzles during dispensing
Solution Approach 1:
The solvent serves as an intermediary that prevents direct contact between undissolved optical brightener particles and the dispensing nozzle. By keeping the optical brightener in dissolved state within the solvent-polymer mixture, the intermediary solvent prevents particle accumulation and clogging in the dispensing system while maintaining UV tracer functionality.
Solution Approach 2:
The patent performs preliminary dissolution of the optical brightener in the solvent before adding it to the polymeric composition. This preliminary action ensures that the optical brightener is already in a dissolved, particle-free state before the dispensing process begins, preventing nozzle clogging during subsequent operations.
3Reliability
If optical brighteners are directly added to polymeric compositions, then the composition contains UV tracer, but the optical brightener is not homogeneously distributed
Solution Approach 1:
The patent changes the concentration parameter of the optical brightener from particulate suspension to molecular dissolution. By selecting solvents with appropriate solubility parameters (esters, ketones, or alcohols), the optical brightener transitions from an undissolved particulate state to a uniformly distributed dissolved state, achieving homogeneous composition stability while maintaining UV tracer functionality.
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 solution achieves homogenous distribution of optical brighteners within the polymeric compositions, preventing nozzle clogging and maintaining adhesive properties, making the compositions suitable for applications like sealants and coatings in electronics and computers.
Implementation Method 1
Dissolving optical brighteners in a solvent, specifically polyalkoxy-silicon compounds like glycidyl 3-(trimethoxysilyl)propyl ether (GLYMO), before adding them to the polymeric composition
Data Source
AI summary
Methods for improving the dispersion of optical brighteners in polymeric compositions are provided. Polymeric compositions obtained by these methods are also provided. Premixes for use in the methods are also provided. In particular, methods for incorporating an optical brightener in a polymeric composition comprising dissolving the optical brightener in a solvent prior to adding the optical brightener to the polymeric compositions are provided.