Thermoplastic molding composition comprising microencapsulated latent-heat-accumulator material

摘要

A thermoplastic molding composition is provided, which comprises A) from 30 to 90% by weight of at least one thermoplastic polymer, B) from 10 to 70% by weight of microcapsules with a capsule core made of latent-heat-accumulator material and a polymer as capsule wall, where the latent-heat-accumulator material has its solid/liquid phase transition in the temperature range from −20° C. to 120° C., and C) from 0 to 60% by weight of one or more further additive, where each of the percentages by weight is based on the total weight of components A) to C) and these give a total of 100% by weight, obtainable via mixing in the melt of components A), B), and optionally C) in a multiscrew extruder, where the multiscrew extruder comprises, along the direction of conveying, in this sequence, at least one feed zone, one plastifying zone, one homogenizing zone, and one discharge zone, and the feed of the microcapsules B) into the multiscrew extruder takes place at a site after—in the direction of conveying—the plastifying zone. And also a process for producing the composition and uses of the composition for producing fibers, foils, moldings, and foams are provided.

主权项

1. A process for producing a thermoplastic molding composition comprising
of from 30 to 90% by weight of a thermoplastic polymer, of from 10 to 70% by weight of microcapsules comprising a capsule core comprising a latent-heat-accumulator material and a polymer as capsule wall, and of from 0 to 60% by weight of a further additive, wherein each percentage by weight is based on a total of 100% by weight of the thermoplastic polymer, the microcapsules, and the additive, the process comprising mixing in a melt of the thermoplastic polymer, the microcapsules, and optionally the additive in a multiscrew extruder, wherein the multiscrew extruder comprises, along a direction of conveying, in this sequence, a feed zone, a plastifying zone, a homogenizing zone, and a discharge zone, and feeding the microcapsules into the multiscrew extruder at a site after—in the direction of conveying—the plastifying zone, and wherein at least part of the thermoplastic polymer is fed into the multiscrew extruder at the feed zone.