Basf Se Corporation

Kolon Plastics, Inc.

Jin-Sang Choi

Achim Stammer

Jürgen Demeter

JongMoon Kim

In-Gi Cho

Marvin Kramp

Sang-Yup Lee

Minlu Zhang

Joong Kyu Chung

Jong-Moon Kim

The present invention relates to a method for the production of a colored polyoxymethylene copolymer by mixing a raw polyoxymethylene copolymer in particulate form, comprising 2 to 30% by weight of unreacted residual monomers, with a coloring agent in particulate form, in a degassing apparatus. In addition, the present invention relates to the colored polyoxymethylene copolymer obtainable by the process and the use of the colored polyoxymethylene copolymer for the production of molding parts.

Method for the production of a colored polyoxymethylene copolymer

A process for making an oxymethylene polymer comprising polymerizing at least one compound capable of forming &#x2014;CHO&#x2014; repeat units (monomer) in the presence of at least one ester of the general formula I (ester): R&#x2014;CO&#x2014;O&#x2014;R(I) wherein Rcan be hydrogen, wherein Rand Rare independently of each other linear or branched Cto Calkyl Cto Ccycloalkyl &#x2014;[R-0-]Rwherein Ris a linear or branched Cto Calkylen and Ris a linear of branched Cto Calkyl and n is an integer of from 1 to 5. and in the presence of at least one Lewis acid.

Process for making an oxymethylene polymer

The present invention relates to a process for energy recovery in a process for the preparation of 1,3,5-trioxane.

Energy recovery in a method for preparing 1,3,5-trioxane

Growing community of inventors

Gimcheon, South Korea

Jin-Sang Choi