PROCESS TO PREPARE ADDITIVE PACKAGES FOR USE IN PVC COMPOUNDING

• Main Authors: LELLIS TADEU, CHO JIAN-YANG, DE LIMA PEDRO M
• Format: Patent
• Language: English
• Published: 24.01.2013
• Subjects: CHEMISTRY; FUELS; INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATINGCOMPOSITIONS; LUBRICANTS; LUBRICATING COMPOSITIONS; MAKING GRANULES OR PREFORMS; METALLURGY; PEAT; PERFORMING OPERATIONS; PETROLEUM, GAS OR COKE INDUSTRIES; PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS; TECHNICAL GASES CONTAINING CARBON MONOXIDE; TRANSPORTING; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATINGINGREDIENTS IN A LUBRICATING COMPOSITION; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

PROBLEM TO BE SOLVED: To provide a process for preparing a one-pack additive package for use in PVC compounding, which has a practical and versatile means.SOLUTION: The process includes the steps of: absorbing liquid additives, if any, into a nucleus; blending the nucleus with solid lubricant(s); and then blending optional solid additives and optional drying agents therewith to obtain a free-flowing, dry blend, particulate one-pack. The resulting layered dry blend composition may then be pelletized, if desired. Because liquids are absorbed into the nucleus and then the temperature is maintained, during and after the lubricant blending step, at least 5°C below the melt temperature of the lowest melting lubricant wax, no free liquids are present and potential interactions between additives are avoided.