Maleated Polyolefin-Polyamide Composition for Low-Viscosity Pipelines
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Solution Overview
Problem
Thermoplastic condensation polyamide resins, such as poly-hexamethyleneadipamide (Nylon-6,6) and other polyamides, exhibit insufficient properties for various end uses like automotive, electronics, and heat transfer applications due to lower tensile strength, chemical resistance, and higher melt viscosities, making them unsuitable for pipeline construction and other demanding applications.
Innovation Solution
A composition comprising at least 30 wt% condensation polyamide and ≥10 wt% to ≤50 wt% maleated polyolefin, with the maleated polyolefin having maleic anhydride grafted onto a polyolefin backbone, providing enhanced properties through uniform distribution and reaction products, which can include chain extenders, fillers, and other additives to improve resistance to cold-temperature cracking, hydrolysis, and chemical exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If thermoplastic condensation polyamide resins are used for pipeline articles, then processing is enabled, but tensile strength and chemical resistance are insufficient
Solution Approach 1:
The patent combines condensation polyamide (providing processability) with polyamide 11 or polyamide 12 (providing enhanced strength and chemical resistance) to create a composite material that achieves both processing capability and superior mechanical properties. The blended composition allows the material to be molded or extruded while attaining tensile strength and chemical resistance comparable to HDPE, N11, N12, N612 and PVDF materials.
2Ease of manufacture
If thermoplastic condensation polyamide resins are used for pipeline articles, then processing is enabled, but chemical resistance is insufficient
Solution Approach 1:
The patent creates a composite material system where condensation polyamide provides processing advantages while polyamide 11 or polyamide 12 contributes superior chemical resistance. The synergistic combination enables the material to withstand chemical exposure in pipeline applications while maintaining ease of manufacturing through molding and extrusion processes.
3Ease of manufacture
If thermoplastic condensation polyamide resins are used for pipeline articles, then processing is enabled, but stress cracking resistance is insufficient
Solution Approach 1:
The blended composition of condensation polyamide with polyamide 11 or polyamide 12 creates a composite material that combines the processability of condensation polyamides with the superior stress cracking resistance of polyamide 11 and polyamide 12, enabling pipeline articles to resist stress cracking while maintaining manufacturing feasibility.
4Ease of manufacture
If thermoplastic condensation polyamide resins are used for pipeline articles, then processing is enabled, but melt viscosity is too high
Solution Approach 1:
The patent utilizes a composite material system where polyamide 11 or polyamide 12 is blended with condensation polyamide to achieve optimal melt viscosity. Polyamide 11 and polyamide 12 have lower melt viscosities compared to condensation polyamides, and their combination enables successful extrusion and molding processes while maintaining the compositional stability needed for pipeline applications.
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 superior mechanical strength, chemical resistance, and reduced melt viscosities, comparable to or exceeding those of HDPE, N11, N12, N612, and PVDF materials, making it suitable for diverse applications including pipeline construction and automotive components.
Implementation Method 1
The maleated polyolefin includes maleic anhydride grafted onto a polyolefin backbone
Data Source
AI summary
The present disclosure relates to compositions and compounded compositions including polyamide and a maleated polyolefin, articles formed from the same such as extruded or molded articles, and methods of making the compositions and articles. A composition includes a condensation polyamide that is at least 30 wt % of the composition and that is the predominant polyamide in the composition. The composition also includes from ≥10 wt % to ≤50 wt % of a maleic anhydride grafted polyolefin having a grafted maleic anhydride incorporation of ≥0.05 to ≤1.5 wt % based on total weight of the maleated polyolefin.