Catalyst Masterbatch is a vital component in the process of cross-linking polyolefins containing silicon-based groups, commonly used in various applications, particularly wire and cable manufacturing and piping. The primary function of a Catalyst Masterbatch is to enhance the cross-linking efficiency and performance of polyolefins when they are combined with suitable catalysts. In this article, we will explore the composition, benefits, and applications of Catalyst Masterbatch, as well as the various methods of producing and utilizing this essential material in the polymer industry.
A typical Catalyst Masterbatch is composed of two primary components:
These two components work together to improve the cross-linking efficiency of polyolefins while simultaneously preventing or significantly reducing the exudation of Brønsted acid and/or sulfonic acid anhydride. The Brønsted acid and/or Brønsted acid anhydride groups can be introduced into the polymer through a process of copolymerization or grafting.
The amount of Brønsted acid and/or Brønsted acid anhydride (A) present in the Catalyst Masterbatch is typically between 0.5 and 20.0 wt.% based on the total weight of the masterbatch. The optimal concentration of this component depends on the specific cross-linking application and the desired efficiency of the process.
The polyolefin (B) component of the Catalyst Masterbatch contains Brønsted acid and/or Brønsted acid anhydride groups that are covalently bound to the polymer. This component constitutes at least 5 wt.% of the total weight of the masterbatch, with concentrations up to 99 wt.% depending on the specific application and requirements. The most commonly used polyolefins in this context are ethylene and propylene polymers.
Catalyst Masterbatch is primarily used in the following applications:
The cross-linking of polyolefins is a critical process in the production of wire and cable insulation materials. The use of Catalyst Masterbatch in this context enables the manufacture of high-quality insulation materials with improved cross-linking efficiency and long-term aging performance.
Catalyst Masterbatch is also employed in the cross-linking of polyolefins for the production of pipes. The improved cross-linking efficiency offered by this material contributes to the production of high-quality pipes with enhanced mechanical and chemical resistance properties.
There are two primary methods for introducing Brønsted acid and/or Brønsted acid anhydride groups into the polymer component of a Catalyst Masterbatch: copolymerization and grafting.
Copolymerization involves the use of unsaturated carboxylic acids or their derivatives as comonomers in the polymerization process. This method results in the formation of a polymer containing Brønsted acid and/or Brønsted acid anhydride groups that are covalently bound to the polymer backbone.
Grafting, on the other hand, involves the chemical attachment of Brønsted acid and/or Brønsted acid anhydride groups to an existing polymer backbone. This process can be carried out using various grafting agents, such as unsaturated carboxylic acids or their derivatives (e.g., anhydrides, esters, and salts). Grafting can be performed in a heated extruder or mixer, with or without the presence of a radical initiator.
Catalyst Masterbatch CT/5 is a polyolefin-based masterbatch designed for use with cable silane cross-linkable compounds. Developed for Polidan®, Polidiemme®, and Cogegum® GFR series compounds, CT/5 offers improved UV/VIS and aging resistance, making it suitable for long-term aging conditions. Additionally, it contains a metal deactivator that allows its use even in direct contact with untinned copper.
Catalyst Masterbatch CT/5 is primarily used in wire and cable applications, providing improved cross-linking efficiency and long-term aging performance. Due to its catalytic activity and anti-aging properties, CT/5 can be employed in a wide range of applications and is available in the Asia Pacific, Europe, and North America regions.
Catalyst Masterbatch plays a crucial role in the cross-linking of polyolefins containing silicon-based groups, offering improved efficiency and performance in various applications, particularly wire and cable manufacturing and piping. With numerous benefits, including cost-effectiveness, enhanced safety and health, and a wide range of applications, Catalyst Masterbatch is an essential component in the polymer industry. The use of advanced materials like Catalyst Masterbatch CT/5 further expands the potential applications and benefits of this material, ensuring its continued significance in the development and production of high-quality polymer-based products.