Formaldehyde-Free Adhesive via Polyaldehyde Resin
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Solution Overview
Problem
Conventional RFL adhesives used for bonding textile materials to rubber compositions contain formaldehyde, which is undesirable due to regulatory changes, necessitating the development of formaldehyde-free adhesive systems for reinforcing tire structures.
Innovation Solution
An aqueous adhesive composition comprising a phenol/aldehyde resin based on aromatic polyaldehyde and phloroglucinol, combined with unsaturated elastomer latex, is used to create a formaldehyde-free bonding solution for textile materials, allowing them to adhere to crosslinkable rubber compositions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional RFL adhesives containing formaldehyde are used, then excellent adhesion of textile materials to rubber compositions is achieved, but harmful formaldehyde is present in the adhesive composition
Solution Approach 1:
The patent changes the chemical composition parameters of the adhesive by replacing formaldehyde with aromatic polyaldehyde and phloroglucinol as the phenolic resin components, while maintaining the adhesion strength through equivalent chemical bonding mechanisms between the adhesive and rubber composition
Solution Approach 2:
The patent eliminates the harmful formaldehyde component while preserving the beneficial adhesion properties by using alternative phenolic resin chemistry that provides similar or improved bonding performance without the toxic effects
2Object-affected harmful factors
If formaldehyde is eliminated from adhesive compositions to meet regulatory requirements, then compliance with European regulations is achieved, but adhesion performance may be compromised
Solution Approach 1:
The patent creates a composite adhesive system combining aromatic polyaldehyde, phloroglucinol, and unsaturated elastomer latex that works synergistically to achieve both regulatory compliance and superior adhesion performance
Solution Approach 2:
The patent modifies the chemical parameters of the phenolic resin by using aromatic polyaldehyde and phloroglucinol instead of formaldehyde, resulting in an adhesive composition that meets regulatory requirements while maintaining bonding effectiveness
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 new adhesive composition achieves equivalent or improved adhesion to conventional RFL adhesives, eliminating the need for formaldehyde while maintaining effective bonding properties, suitable for reinforcing various rubber articles and tires.
Implementation Method 1
a phenol/aldehyde resin, which is based on at least: one aromatic polyaldehyde bearing at least two aldehyde functional groups, comprising at least one aromatic nucleus, and phloroglucinol
Implementation Method 2
B) an unsaturated elastomer latex
Data Source
AI summary
An aqueous adhesive composition includes: a phenol/aldehyde resin; and an unsaturated elastomer latex. The phenol/aldehyde resin is based on at least: an aromatic polyaldehyde bearing at least two aldehyde functional groups and including at least one aromatic nucleus; and phloroglucinol. The adhesive composition is useable to make a textile material adhere to a crosslinkable rubber composition, and may be used as an advantageous alternative to a formaldehyde-based RFL adhesive.