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Pepton® 22
Pepton® 22 acts as radical acceptors, removing free radicals formed during the initial mixing of the elastomer. This prevents polymer recombination, allowing a consequent drop in polymer molecular weight, and thus the reduction in compound viscosity. Pepton 22® is inhibited by sulphur, so compounded rubbers undergo no further viscosity change on storage. Mastication should be completed before the addition of other compounding ingredient s.
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Also from Thomas Swan & Company Limited
Casachem™ PEG 3350
Casachem™ PEG 3350 functions primarily as an internal lubricant in rubber compounds by migrating to interfacial regions between polymer chains and fillers. This reduces internal friction during processing, leading to smoother extrusion and moulding. Its hydrophilic nature promotes better dispersion of fillers and active ingredients, improving consistency and performance of the final elastomer product. It can also plasticise polar polymer matrices, enhancing flexibility and elasticity.
Casachem™ PEG 4000
Casachem™ PEG 4000 functions as a solid lubricant and internal plasticiser, lowering viscosity during processing and promoting uniform dispersion of fillers and curatives. It enhances polymer flexibility, improves flow properties, and supports compatibility between polar and non-polar components, thereby contributing to better surface finish and mechanical properties.
Casachem™ PEG 600
Casachem™ PEG 600 acts primarily as a low-molecular-weight lubricant and plasticiser. It reduces interchain friction in polymers, improving flexibility, flow, and processing efficiency. Its hydrophilic nature enhances solubility and dispersion of active ingredients, while its humectant properties retain moisture in adhesives and coatings. In rubber applications, it functions as a mould-release agent, minimising adhesion to metal surfaces and improving demoulding efficiency.
Casachem™ PEG 6000
Casachem™ PEG 6000 functions as a processing aid and cure promoter in rubber compounding. It lubricates polymer chains, lowering mixing torque and improving extrusion. In filled compounds, it neutralises acidic fillers, reducing cure retardation and improving vulcanisation rates. Its amphiphilic nature (polar ether linkages and non-polar CH2 groups) promotes compatibility across diverse systems, ensuring homogeneous dispersion and improved physical properties in the final product.
