Polyoxymethylene homopolymers and copolymers, and production and use thereof
AssigneeTicona LLC
InventorsDirk Zierer, Jens Schiebisch, Klaus Kurz
Life of this patent
Estimating the term…
Abstract
Homo- or copolyoxymethylenes are described and contain the repeat structural unit of formula I -A-O—R1—O—CO—(R2—CO—)m—O— (I), where A is a radical derived from a homo- or copolyoxymethylene, R1 is an alkylene radical having at least two carbon atoms, or a cycloalkylene radical, R2 is a direct carbon-carbon bond, or an alkylene, cycloalkylene, arylene, or aralkylene radical, and m is 0 or 1. These polymers may be prepared by reacting end-group-functionalized homo- or copolyoxymethylenes with selected chain-linking agents. The reaction products can be used to produce moldings.
Claims24
A homo- or copolyoxymethylene containing the structural unit of formula I
- —A—O—R1—O—CO—(R2—CO—)m—O— (I),
- where A is a radical derived from a homo- or copolyoxymethylene,
- R1 is an alkylene radical having at least two carbon atoms, or a cycloalkylene radical,
- R2 is a direct carbon-carbon bond, or an alkylene, cycloalkylene, arylene, or aralkylene radical, and
- m is 0 or 1.
A process for the chain-extension of homo- or copolyoxymethylenes, encompassing the reaction of homo- or copolyoxymethylenes of the formula II with at least one chain-linking agent of the formula III
- R4—A—O—R1—OH (II),
- R7—CO—(R2—CO—)m—R8 (III),
- where A is a radical derived from a homo- or copolyoxymethylene,
- R1 is an alkylene radical having at least two carbon atoms, or a cycloalkylene radical,
- R2 is a direct carbon-carbon bond or an alkylene, cycloalkylene, arylene, or aralkylene radical,
- R4 is a radical of the formula —OH, —O—R5, —O—CO—R6, or —O—R1—OH, where R1 is defined at an earlier stage above,
- R5 is an alkyl, cycloalkyl, aryl, or aralkyl radical,
- R6 is hydrogen or an alkyl, cycloalkyl, aryl, or aralkyl radical,
- m is 0 or 1, and
- R7 and R8, independently, of one another, are alkoxy, cycloalkoxy, aryloxy, aralkyloxy, or a lactam radical bonded by way of the nitrogen atom, or where, in the case where m=1, R7 and/or R8 together with another carboxylic acid group of the radical R2 form an anhydride or imide group.
Dependencies are inferred from the claim text.