Amino-Controlled Polyamide Composition for Polyolefin Bonding
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Solution Overview
Problem
Existing polyamide resin compositions require improvements in mechanical characteristics, bonding properties with acid-modified polyolefin, and resistance to calcium chloride, particularly in applications involving snow-melting chemicals.
Innovation Solution
A polyamide resin composition comprising 70 to 99% aliphatic polyamide resin with specific amino group concentration, 0 to 18% aromatic polyamide resin, 0.01 to 0.50% polyalkylene glycol alkyl ether, and 0 to 0.50% polyolefin wax, with an acid-modified polyolefin having 8 to 100 µmol/g acid modification, enhancing bonding properties and calcium chloride resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a polyamide resin composition is used to achieve fuel permeation resistance, then fuel resistance is improved, but mechanical characteristics and bonding properties with acid-modified polyolefin deteriorate
Solution Approach 1:
The patent changes the chemical composition parameters of the polyamide resin by specifying precise ranges for amino group concentration (46 to 110 μmol/g) and incorporating specific additives (polyalkylene glycol alkyl ether at 0.01 to 0.50 mass%, polyolefin wax at 0.01 to 0.50 mass%). These parameter adjustments optimize both fuel permeation resistance and mechanical properties simultaneously
Solution Approach 2:
The patent creates a composite resin composition by combining polyamide resin with acid-modified polyolefin (8 to 100 μmol/g acid modification). This composite approach leverages the fuel resistance of polyamide while the polyolefin component enhances mechanical characteristics and bonding properties
2Reliability
If a polyamide resin composition is used to achieve fuel permeation resistance, then fuel resistance is improved, but bonding properties with acid-modified polyolefin deteriorate
Solution Approach 1:
The patent adjusts the amino group concentration parameter to 46 to 110 μmol/g and controls the acid modification amount of polyolefin at 8 to 100 μmol/g. These optimized parameters enable effective chemical bonding between the polyamide and polyolefin components while maintaining fuel permeation resistance
Solution Approach 2:
The patent uses polyalkylene glycol alkyl ether and polyolefin wax as intermediary substances that facilitate bonding between the polyamide resin and acid-modified polyolefin. These intermediaries improve interfacial adhesion and bonding properties while preserving the fuel resistance characteristics
Data Source
Figure 1~2
AI summary
The present invention relates to a polyamide resin composition that is excellent in mechanical characteristics, bonding properties and calcium chloride resistance and is suitably bonded to an acid-modified polyolefin, wherein the polyamide resin composition includes 70 to 99 mass% of an aliphatic polyamide resin (A) having an amino group concentration of 46 to 110 µmol/g, 0 to 18 mass% of an aromatic polyamide resin (B), 0.01 to 0.50 mass% of a polyalkylene glycol alkyl ether (C), 0.01 to 0.50 mass% of a polyolefin wax (D) and 0 to 22.98 mass% of a component (E) other than (A) to (D), and the total of (A) to (E) is 100 mass%, and wherein the acid-modified polyolefin having an amount of acid modification of 8 to 100 µmol/g.