Curable Composition Flexibility Adhesion Nutshell Oil Resin
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Solution Overview
Problem
Current curable compositions fail to provide suitable flexibility and adhesion to oily metals in both hot and cold environments, often resulting in a loss of desired properties when modified.
Innovation Solution
A curable composition comprising an epoxy-rubber copolymer adduct, a curing agent, hydrophobic fumed silica additive, and an adhesion promoter, with the addition of an epoxy functionalized resin derived from nutshell oil and optionally a liquid modified hydrocarbon resin, which enhances flexibility and adhesion to oily metals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional curable compositions are modified to improve flexibility, then flexibility is enhanced, but adhesion to oily metals is lost
Solution Approach 1:
The patent uses a composite formulation combining epoxy-rubber copolymer adduct (providing flexibility), epoxy functionalized resin from nutshell oil (providing adhesion to oily metals), hydrophobic fumed silica additive, and adhesion promoter. This composite approach allows simultaneous achievement of flexibility and adhesion by integrating materials with complementary properties.
Solution Approach 2:
The patent modifies the chemical composition parameters by incorporating specific ratios of epoxy-rubber copolymer adduct (40-70 parts by weight), epoxy functionalized resin (10-40 parts by weight), and adhesion promoter (0.1-5 parts by weight). These parameter changes enable the composition to achieve both flexibility and adhesion to oily metals in both hot and cold environments.
2Temperature
If curable compositions are modified to achieve high temperature resistance, then temperature resistance is improved, but flexibility and adhesion are compromised
Solution Approach 1:
The patent employs a composite material system where the epoxy-rubber copolymer adduct provides high temperature resistance through its thermal stability, while the epoxy functionalized resin from nutshell oil maintains flexibility and adhesion properties. The synergistic combination allows the composition to withstand high temperatures without losing flexibility or adhesion.
Solution Approach 2:
The patent applies local quality by using hydrophobic fumed silica additive (0.1-5 parts by weight) specifically to enhance high temperature resistance in the composition, while the base epoxy-rubber copolymer adduct and epoxy functionalized resin maintain the overall flexibility and adhesion properties through their inherent material characteristics.
3Adaptability or versatility
If curable compositions are modified to bond to oily metals in hot and cold environments, then environmental adaptability is improved, but adhesion is lost
Solution Approach 1:
The patent changes the chemical parameters by incorporating adhesion promoter (0.1-5 parts by weight) and epoxy functionalized resin from nutshell oil (10-40 parts by weight) to enable the composition to bond effectively to oily metals across a wide temperature range. These parameter modifications ensure adhesion is maintained while achieving environmental adaptability.
Solution Approach 2:
The patent uses adhesion promoter as an intermediary substance that facilitates bonding between the curable composition and oily metals. The adhesion promoter acts as a mediator that enables effective adhesion in both hot and cold environments, allowing the composition to bond to oily metals without sacrificing adhesion for environmental adaptability.
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 composition achieves excellent adhesion and flexibility, maintaining high temperature resistance and preventing cohesion failure, as demonstrated by passing the knife test/peel test, mandrel bend test, and high temperature resistance test.
Implementation Method 1
a curable composition comprising an epoxy-rubber copolymer adduct, a curing agent, a hydrophobic fumed silica additive, and an adhesion promoter, with the addition of an epoxy functionalized resin derived from nutshell oil and optionally a liquid modified hydrocarbon resin, which enhances flexibility and adhesion to oily metals
Implementation Method 2
a curable composition comprising an epoxy-rubber copolymer adduct, a curing agent, a hydrophobic fumed silica additive, and an adhesion promoter
Implementation Method 3
Curable compositions undergo a transformation called curing upon heating or exposure to a variety of reagents, usually acids or bases
Data Source
AI summary
A curable composition, includes a diluent, an epoxy functionalized resin derived from a nutshell oil, an epoxy-rubber copolymer adduct, and a curing agent. There is disclosed a method for making the curable composition, a method of imbuing improved flexibility to a curable composition and a method for improving oily metal adhesion of a curable composition. The method of imbuing improved flexibility to a curable composition includes providing a curable composition, adding an epoxy functionalized resin derived from a nutshell oil and adding a liquid modified hydrocarbon resin derived from a nutshell oil.