Rubber Hose Composition Flow Control
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Solution Overview
Problem
Conventional rubber compositions for hoses, particularly those containing acrylonitrile butadiene rubber, exhibit high fluidity when heated, leading to seepage issues in hose applications.
Innovation Solution
A rubber composition for hoses comprising acrylonitrile butadiene rubber, a filler, a resorcin-formaldehyde precondensate, an aldehyde-ammonia vulcanization accelerator, and a fatty acid diester, where the fatty acid diester has at least 12 carbon atoms, effectively suppresses flowability by facilitating vulcanization reactions without hindering crosslinking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional rubber composition containing acrylonitrile butadiene rubber is used, then the rubber composition is highly fluid when heated, but this causes the rubber to seep through to the exterior of the hose
Solution Approach 1:
The patent changes the chemical composition parameters by introducing a resorcin-formaldehyde precondensate and an aldehyde-ammonia vulcanization accelerator in specific ratios. This modifies the rheological properties of the rubber composition, reducing its fluidity when heated from conventional high fluidity to a controlled level that prevents seepage while maintaining manufacturability
Solution Approach 2:
The patent creates a composite rubber composition by combining acrylonitrile butadiene rubber with a resorcin-formaldehyde precondensate system. This composite formulation integrates multiple functional components that work synergistically to control flow behavior during heating and vulcanization processes
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 significantly reduces flowability, enhancing the dimensional stability and precision of hoses by preventing seepage during manufacturing and initial vulcanization phases, making it suitable for high-pressure applications like hydraulic hoses.
Implementation Method 1
A rubber composition for hoses containing acrylonitrile butadiene rubber, a filler, a resorcin-formaldehyde precondensate, an aldehyde-ammonia vulcanization accelerator, and a fatty acid diester
Implementation Method 2
an aldehyde-ammonia vulcanization accelerator
Data Source
AI summary
Provided are a rubber composition for hoses containing acrylonitrile butadiene rubber, a filler, a resorcin-formaldehyde precondensate, an aldehyde-ammonia vulcanization accelerator, and a fatty acid diester, and a hose including a layer formed using the same.