Phenolic Fatty Acid Coupling for Synthetic Fabric Adhesion
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Solution Overview
Problem
Existing technologies face challenges in achieving strong adhesion between synthetic fabric materials and phenolic adhesives, leading to inadequate bonding in composite materials like rubber articles.
Innovation Solution
A process involving the creation of phenolic fatty acid compounds with reduced phenolic ester content, which are then used to chemically bond phenolic resins with synthetic fabric materials by introducing a hydroxy phenyl functional group, enhancing the adhesion between the fabric and the resin.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional adhesive systems (RFL coating or hexamethylenetetramine-resorcinol) are used to promote adhesion between fabric and polymer matrix, then adhesion is improved to some extent, but strong chemical bonding between fabric phase and phenolic adhesive is not achieved
Solution Approach 1:
The invention changes the chemical parameters of the adhesive system by using phenolic fatty acid compounds with specific molecular structures containing both phenolic hydroxyl groups and fatty acid chains. This chemical parameter change enables the adhesive to simultaneously bond with both the fabric phase and polymer matrix phase, achieving strong chemical bonding that conventional adhesive systems cannot provide.
Solution Approach 2:
The invention creates a composite adhesive system where phenolic fatty acid compounds serve as the bonding agent, combining the adhesive properties of phenolic resins with the fabric-compatible properties of fatty acids. This composite approach allows the adhesive to interact with both polar and non-polar phases, achieving reliable chemical bonding between fabric and polymer matrix.
2Ease of manufacture
If synthetic fabric with smooth polymer surfaces is used as reinforcing material, then fabric processing and manufacturing are simplified, but adhesion to polymer matrix is poor due to low surface activity
Solution Approach 1:
The phenolic fatty acid compound acts as an intermediary substance between the smooth synthetic fabric surface and the polymer matrix. The fatty acid portion of the compound interacts with the fabric surface while the phenolic hydroxyl groups bond with the polymer matrix, effectively mediating the adhesion between these two phases despite the fabric's low surface activity.
Solution Approach 2:
The invention changes the surface chemical parameters of the fabric interface by introducing phenolic fatty acid compounds that modify the surface energy and chemical reactivity. This parameter change transforms the low-surface-activity fabric into a high-adhesion substrate without altering the fabric's physical structure or manufacturing simplicity.
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
This method significantly improves the adhesion between synthetic fabric materials and phenolic resins, resulting in enhanced mechanical properties and integrity of composite materials such as synthetic fabric-reinforced rubber compositions.
Implementation Method 1
reacting a phenolic compound with the fatty acid composition in the presence of an acidic catalyst at a temperature ranging from about 90° C. to about 120° C. to form the phenolic fatty acid compound
Implementation Method 2
react the carboxylic acid-reactive functional group of the non-phenolic polymer with the carboxylic acid group of the phenolic fatty acid compound, thereby attaching a hydroxy phenyl functional group to the non-phenolic polymer
Implementation Method 3
reacting the hydroxy phenyl functional group of the non-phenolic polymer with a phenolic resin or a phenolic crosslinker composition capable of forming a phenolic resin, to chemically bond the phenolic resin with the non-phenolic polymer
Data Source
AI summary
This invention relates to a process for making phenolic fatty acid compounds having a reduced phenolic ester content. The invention also relates to method for chemically bonding a phenolic resin with a non-phenolic polymer (e.g., a synthetic fabric). The method comprises contacting a phenolic fatty acid compound with a non-phenolic polymer to introduce a hydroxy phenyl functional group into the non-phenolic polymer; and reacting the hydroxy phenyl functional group contained in the non-phenolic polymer with a phenolic resin or a phenolic crosslinker composition capable of forming a phenolic resin, to chemically bond the phenolic resin with the non-phenolic polymer. The invention is particularly useful for making a synthetic fabric-reinforced article, such as synthetic fabric-reinforced rubber article, circuit board substrate, or fiberglass.