Catalyst Masterbatch

Achieving exceptional properties in cross-linked polymers like PEX and XLPE requires a complex process called cross-linking. Traditionally, in the silane method (PEX-b), this has involved lengthy and costly curing steps in a hot water bath or steam. Meanwhile, innovative solutions like Behin Polymer’s catalyst masterbatch have revolutionized this process, enabling manufacturers to achieve unparalleled quality by eliminating time-consuming steps. At Behin Polymer Company, we produce catalyst masterbatches of the highest quality for the cross-linking process.

Revolutionizing PEX-b and XLPE Production with Catalyst Masterbatch

The production of silane cross-linked polyethylene (PEX-b) typically involves two main components: silane-grafted polyethylene (component A) and a catalyst (component B). This post-extrusion step traditionally requires significant space, energy, and time. The catalyst masterbatch produced by Behin Polymer has completely changed this equation.

This specialized masterbatch effectively functions in the cross-linking process of PEX-b and XLPE type cross-linked polyethylenes and is key to eliminating the costly curing step. This innovation allows manufacturers to achieve the desired degree of cross-linking in a much shorter time, either during the extrusion process or by utilizing ambient temperature and humidity (Curing at ambient temperature).

Cross-linking Stability with New Generation Catalyst Masterbatches

One of the fundamental challenges in polyethylene cross-linking is maintaining reaction stability under varying humidity and temperature conditions. Behin Polymer’s new generation catalyst masterbatches have completely overcome this challenge by utilizing stable metallic compounds and humidity-controlling additives. This advanced formulation not only prevents premature reaction during extrusion but also ensures uniform and predictable cross-linking through the gradual release of the active agent upon contact with moisture. The result is the achievement of polymers with more regular molecular structures, enhanced mechanical properties, and long-term stability against thermal and environmental stresses, which is critically important, especially in the cable and high-pressure pipe manufacturing industries.

The Role of Catalyst Masterbatch in PEX-b Production

The vital role of catalyst masterbatch in the PEX-b production process is to facilitate and accelerate the chemical cross-linking reaction. In the silane cross-linking method, silane groups are first grafted onto polyethylene chains. This grafted polymer (component A) then proceeds to the mixing stage with the catalyst masterbatch (component B). The catalyst activates in the presence of moisture, accelerating the hydrolysis of alkoxy silane groups. The quality and speed of this reaction directly depend on the type of catalyst.

Behin Polymer’s advanced catalyst masterbatch is formulated to rapidly initiate and complete the cross-linking reaction at lower temperatures by absorbing ambient moisture, without the need for pipes to enter an external forced curing environment. This means there is no longer a need to install and maintain complex steaming systems.

Results of Eliminating the Curing Step with Catalyst Masterbatch

Eliminating the hot water or steam curing step represents a significant leap in production efficiency. This innovative alternative process, relying on the special formulation of the catalyst masterbatch, enables continuous and uninterrupted production. The use of this new generation of masterbatches brings the potential to produce pipes and cables with a higher degree of cross-linking and more uniform distribution, directly leading to improved abrasion resistance, high-temperature stability, and chemical resistance of the polymer.

Advantages of Using Catalyst Masterbatch

Choosing a suitable and high-quality catalyst masterbatch is a decisive factor in the efficiency and success of cross-linked polymer production. Behin Polymer’s unique polymeric product formulation is based on high-performance metallic catalysts that possess suitable thermal stability at extrusion temperatures, while simultaneously activating the cross-linking reaction at a controlled and optimal rate upon contact with moisture. This precise control over the reaction rate prevents premature cross-linking in the extruder and minimizes the final curing time.

Manufacturers can benefit from the following advantages by using catalyst masterbatch:

• Reduced Energy Consumption: Elimination of the steam or hot water curing step, which is one of the most energy-intensive stages of the process.
• Increased Production Speed: Completion of the cross-linking process in the shortest possible time, even at ambient temperature.
• Reduced Equipment Costs: Elimination of the need for investment in steam tanks and auxiliary equipment.
• Improved Final Properties: Achievement of an optimal and uniform degree of cross-linking, leading to increased product lifespan and resistance.

Other advantages observed in terms of product quality and application in various uses include the production of products with greater flexibility at low temperatures, higher creep resistance at high temperatures, and better hydrolysis stability when exposed to water and chemicals. These advantages are particularly important in the production of pipes used in underfloor heating systems and potable water distribution.

Performance of Cross-linked Polyethylenes Using Catalyst Masterbatch

One of the critical criteria in evaluating the quality of cross-linked polyethylenes (XLPE and PEX-b) is their thermal stability over time and under harsh operating conditions. The cross-linking process with catalyst masterbatch leads to the formation of high-density and uniform siloxane networks (Si–O–Si) in the molecular structure. These stable cross-links prevent the movement of polymer chains at high temperatures, thereby significantly increasing the product’s thermal resistance and dimensional stability.

Behin Polymer: A Leader in Producing Various Catalyst Masterbatches

In the complex field of polymer industries, Behin Polymer, as a technical partner, is committed to providing solutions that maximize your production efficiency and quality. We believe that by offering specialized and efficient products like catalyst masterbatch, we can play a key role in helping you achieve your industrial goals.