Silanol Catalyst Masterbatch Composition for Low-Shrinkage Cross-Linking
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Solution Overview
Problem
Existing silanol condensation catalyst masterbatches based on unpolar or polar carrier resins face limitations such as restricted polar additive inclusion leading to stability issues or radial shrinkage in cross-linked polymer compositions, particularly affecting cable applications.
Innovation Solution
A polymer composition comprising polyethylene, ethylene (meth)acrylate copolymer, silanol condensation catalyst, and scorch retardant additive, which mitigates radial shrinkage while maintaining stability and surface finishing in cross-linked articles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If masterbatches based on polar carrier resins are used, then the amounts of polar additives can be increased, but radial shrinkage of the cross-linked polymer composition occurs
Solution Approach 1:
The patent uses a composite carrier resin system combining polar and non-polar components. Specifically, it employs polar carrier resin (such as polyacrylic acid or polyacrylamide) in combination with non-polar carrier resin (such as polyethylene or polypropylene), creating a balanced composite that provides both polar additive compatibility and dimensional stability during cross-linking.
2Shape
If masterbatches based on unpolar carrier resins are used, then radial shrinkage is reduced, but the amounts of polar additives are limited
Solution Approach 1:
The patent uses a composite carrier resin system combining polar and non-polar components. Specifically, it employs polar carrier resin (such as polyacrylic acid or polyacrylamide) in combination with non-polar carrier resin (such as polyethylene or polypropylene), creating a balanced composite that provides both polar additive compatibility and dimensional stability during cross-linking.
3Reliability
If sufficient amounts of polar additives are included, then stability and surface finishing are improved, but radial shrinkage increases
Solution Approach 1:
The patent uses a composite carrier resin system combining polar and non-polar components. Specifically, it employs polar carrier resin (such as polyacrylic acid or polyacrylamide) in combination with non-polar carrier resin (such as polyethylene or polypropylene), creating a balanced composite that provides both polar additive compatibility and dimensional stability during cross-linking.
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 effectively reduces radial shrinkage and maintains important end properties like stability and surface finishing in cross-linked articles, improving handling and performance in cable applications.
Implementation Method 1
a silanol condensation catalyst which is present in an amount of 0.1 to 5.0 wt. %, based on the total weight of the polymer composition (PC)
Implementation Method 2
The hydrolysable silane groups can react with water to provide silanol groups which subsequently cross-link with one another
Data Source
AI summary
The invention relates to a polymer composition (PC) comprising (a) a polyethylene (PE), which does not contain hydrolysable silane groups, (b) an ethylene (meth)acrylate copolymer (EAC), (c) a silanol condensation catalyst (SCC), and (d) a scorch retardant additive (SRA). The invention further relates to use of said polymer composition (PC) as a masterbatch for the preparation of cross-linkable polymer compositions, to said cross-linkable polymer compositions, and to articles comprising said cross-linkable polymer compositions.