Bio-Based Epoxy Resin Composition With Powder-Phase Graft Dispersion
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Solution Overview
Problem
The challenge is to replace conventional petroleum-based epoxy resins with eco-friendly bio-based epoxy resins while maintaining mechanical strength characteristics and improving process costs and environmental aspects, particularly in dispersing a graft copolymer using a powder phase dispersion method.
Innovation Solution
A curable resin composition comprising a bio-based epoxy resin with a core-shell type graft copolymer, where the bio curable resin includes 58 wt % to 82 wt % of a bio curable resin and 18 wt % to 42 wt % of an epoxy resin, with a core diameter of 100 nm to 500 nm, and a shell formed by graft polymerizing a graft monomer to the rubbery polymer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a liquid dispersion method is used to disperse graft copolymer in epoxy resin, then homogeneous distribution is achieved, but storage problems occur requiring latex state maintenance and solvent replacement increases process cost and environmental issues
Solution Approach 1:
The invention changes the physical state parameter of the graft copolymer from liquid latex to powder form. This parameter change eliminates the need for solvent replacement processes while maintaining dispersion quality, thereby reducing process complexity and environmental issues associated with liquid dispersion methods
Solution Approach 2:
The invention extracts the solvent component from the dispersion system by using powder-phase graft copolymer instead of liquid latex. This extraction removes the harmful solvent replacement step while preserving the homogeneous distribution benefit, directly addressing the contradiction between composition stability and process complexity
2Ease of manufacture
If a powder phase dispersion method is used to disperse graft copolymer in epoxy resin, then process costs are reduced, but viscosity becomes very high making dispersion difficult or impossible
Solution Approach 1:
The invention applies local quality by creating a core-shell structure where the shell portion has specific properties that differ from the core. The shell is designed with controlled thickness and composition to locally modify the particle surface properties, reducing interparticle interactions and viscosity while maintaining the powder phase advantages for cost reduction
Solution Approach 2:
The invention uses composite material structure in the core-shell graft copolymer where the shell layer acts as a composite component between the rubbery core and the epoxy resin matrix. This composite structure improves dispersion ease by creating an intermediate phase that facilitates powder phase dispersion while maintaining low process costs
3Object-affected harmful factors
If conventional petroleum-based epoxy resins are replaced with eco-friendly bio-based epoxy resins, then environmental pollution is reduced, but mechanical strength characteristics may be compromised
Solution Approach 1:
The invention creates a composite system combining bio-based epoxy resin with core-shell graft copolymer. The graft copolymer acts as a toughening agent that compensates for the potentially lower mechanical strength of bio-based resins, while the core-shell structure ensures optimal dispersion and stress distribution, maintaining mechanical strength while achieving environmental benefits
Solution Approach 2:
The core-shell graft copolymer serves as an intermediary between the bio-based epoxy resin and the required mechanical performance. The shell portion specifically interacts with the bio-resin matrix while the core provides toughening, mediating the relationship between environmental friendliness and mechanical strength requirements
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 reduces environmental pollution, satisfies mechanical strength requirements, and enhances productivity and mechanical properties by using a powder phase dispersion method for the graft copolymer in the curable resin composition.
Implementation Method 1
as methods for dispersing the graft copolymer in the epoxy resin, there are a liquid dispersion method and a powder phase dispersion method
Implementation Method 2
In order to improve the impact resistance of epoxy resins, there has been suggested a method of using a graft copolymer containing a rubbery polymer as an impact reinforcing agent
Implementation Method 3
If the conventional petroleum-based epoxy resins are replaced with eco-friendly bio-based epoxy resins, environmental pollution that occurs during the production of petroleum-based raw materials may be reduced
Data Source
AI summary
Provided are a curable resin composition, which reduces environmental pollution by using an eco-friendly bio-based epoxy resin instead of the conventional petroleum-based epoxy resin, satisfies all the mechanical strength characteristics required by a curable resin composition containing the conventional petroleum-based epoxy resin, and has excellent productivity and excellent mechanical properties by dispersing a graft copolymer in a curable resin through a powder phase dispersion method, and an adhesive composition comprising the same.