Patent ID: 9714324
Date: 2017-07-25
CPC Classifications: C08F,C08J,C08L

Claim:
1. A process for producing a composition comprising A) 0 to 98 parts by weight, based on the sum total of A and B, of a thermoplastic polymer or a mixture of a plurality of thermoplastic polymers different from B and B) 2 to 100 parts by weight, based on the sum total of A and B, of C) 0 to 30 parts by weight, based on the sum total on A and B, of at least one commercially available polymer additive, where the sum total of parts by weight A and B is 100, and component B, optionally component B1 or a pre-compound composed of component B1 with at least one of components B2 and B3 or with a portion of at least one of components B2 and B3, more preferably a pre-compound composed of component B1 and the entirety or a portion of component B3, comprises at least one inorganic salt consisting of a cation selected from the group of the alkali metals, alkaline earth metals and aluminum and an anion selected from the group consisting of chloride, sulfate, nitrate, phosphate, acetate and formate, in a concentration of the salt or salt mixture of 100 to 5000 mg/kg, based on the composition, and wherein a) in a first process step the entirety of the component(s) containing the salt from B, optionally together with a portion or the entirety of the remaining components from B, A and C, is contacted in a shaft drier, air circulation drier or climate-controlled silo with a water vapor-containing atmosphere having a relative air humidity of at least 70%, b) in a second process step the component(s) thus contacted with water are melted and kneaded in the molten state and/or c) in a third process step the component thus prepared is mixed with the remaining components of the composition, the mixture is melted again and kneaded, and the components of the mixture are interdispersed in this way, where a reduced pressure of at least 200 mbar is applied at least in one of steps b) and c) and, in this way, the water introduced into the process in process step a) is removed again from the product.