Cyanate-Epoxy Resin Composition for Storage Stability and Heat Resistance
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Solution Overview
Problem
Existing cyanate-epoxy composite resin compositions fail to achieve both sufficient storage stability and heat resistance, and the use of 4-aminophenol-type epoxy resin in combination with cyanate ester resin does not fully address storage stability issues.
Innovation Solution
A curable resin composition comprising a cyanate ester resin, a specific epoxy resin (4-amino-3-methylphenol-type epoxy resin and an aliphatic epoxy resin), and a latent curing agent, with specific mass percentages of each component, to enhance storage stability and heat resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a conventional method using silane-modified polyethylene crosslinked by radiation or peroxide is used, then crosslinked rubber granules can be obtained, but the granules have poor adhesion to the matrix resin and exhibit uneven crosslinking structure
Solution Approach 1:
The invention extracts and separates the crosslinking reaction from the granule formation process. By performing crosslinking after molding rather than during granule preparation, it eliminates the uneven crosslinking and poor adhesion problems associated with conventional pre-crosslinked granules, while maintaining the benefits of crosslinked elastomer composition
Solution Approach 2:
The invention applies silane modification to the elastomer before molding to prepare it for subsequent crosslinking. This preliminary functionalization enables uniform crosslinking throughout the molded product when exposed to moisture or catalysts, ensuring both structural uniformity and good adhesion to the matrix resin
2Strength
If polyethylene crosslinked by radiation or peroxide is used, then crosslinked rubber granules can be produced, but they show poor adhesion to the matrix resin
Solution Approach 1:
The invention changes the crosslinking mechanism from radiation or peroxide-based crosslinking to moisture- or catalyst-induced crosslinking of silane-modified elastomer. This parameter change improves adhesion to the matrix resin while simplifying the manufacturing process by eliminating the need for specialized radiation equipment or peroxide handling procedures
Solution Approach 2:
The invention creates a composite structure where silane-modified elastomer granules are dispersed in a matrix resin, with crosslinking occurring in situ. This composite approach enhances interfacial adhesion between the elastomer and matrix resin, solving the poor adhesion problem while maintaining ease of manufacture through conventional molding processes
3Reliability
If silane-modified polyethylene crosslinked by moisture or catalyst is used, then good adhesion to matrix resin can be achieved, but the composition becomes sensitive to moisture during storage
Solution Approach 1:
The invention applies silane modification to the elastomer before molding, but the actual crosslinking reaction is delayed until after molding when the product is exposed to controlled moisture or catalysts. This timing strategy maintains storage stability by preventing premature crosslinking while ensuring good adhesion properties are achieved during the controlled crosslinking phase
Solution Approach 2:
The invention uses silane-modified elastomer that remains stable during storage but crosslinks readily when exposed to moisture or catalysts. This beforehand preparation cushions against storage stability issues by designing a system that is inert during storage but becomes active under controlled conditions, ensuring both stability and adhesion
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 storage stability and heat resistance in the cured product, providing a balanced performance that surpasses previous compositions.
Implementation Method 1
a composition comprising 100 parts by weight of a silane-modified elastomer which has been crosslinked by contact with water or a catalyst
Implementation Method 2
When silane-modified polyethylene crosslinked by contact with water or a catalyst is used, the polyethylene can be crosslinked uniformly throughout the composition
Data Source
AI summary
Disclosed is a curable resin composition containing: (A) a cyanate ester resin; (B) an epoxy resin essentially including at least a 4-amino-3-methylphenol-type epoxy resin; and (C) a latent curing agent. Preferably, the cyanate ester resin (A) is at least one selected from the group consisting of compounds represented by formula (1) below, compounds represented by formula (2) below, and at least one of polymer of these compounds. Formula (1): NC-O-A1-Y1-A2-O-CN (See the Description for the symbols in the formula). Formula (2): (See the Description for the symbols in the formula).