Development of DSM's hybrane® hyperbranched polyesteramides

Abstract

ABSTRACT:The development of DSM's Hybrane hyperbranched poly(ester amides) is described. The monomer (1) for the hyperbranched polyester is obtained from the reaction of a cyclic anhydride with diisopropanol amine, yielding a tertiairy amide with one COOH and two OH groups. Polycondensation takes place via an oxazolinium intermediate in bulk at relatively mild conditions in the absence of catalyst. The reaction has been scaled up to ton scale. By varying and combining anhydrides, and modification with several types of end groups, a large variety of structures with concomitant properties and industrial applications has been realized.

A comparative study of the structure–property behavior of highly branched segmented poly(urethane urea) copolymers and their linear analogs

“…Since their initial discovery, the synthesis of hyperbranched counterparts of almost all common linear polymers has been reported [1][2][3][4]. DSM Corporation of The Netherlands recently reported [5] perhaps the first commercialization of hyperbranched polymers, the Hybrane w polyesteramides. These materials are targeted for applications that include improving the dyeability of polypropylene fibers and improving the control of the rheological behavior of paper coating dispersions.…”

Single-Molecule Dendrimer-Hydrocarbon Interaction

“…One promising practice regarding the use of dendrimers and other hyper-branched polymers is their effective prevention of gas hydrate formation in the oil pipeline, a problem that plagues the petroleum industry [11][12][13]. At high pressures and low temperatures, as is the case with oil production and deep-sea transportation, hydrates constantly occur when water hydrogen bonds with the hydrocarbons in gas and oil products.…”

“…In sufficient quantities these hydrates can completely block pipelines by agglomerating to create very stable, ice-like plugs, leading to disruptive and costly production stoppages [14]. Dendritic polymers can act as antiagglomerants or "surfactants" by preventing large hydrates from forming and keeping small crystals suspended in the production flow [11]. The major advantages of using den- The major purpose of this paper is to understand dendrimer-hydrocarbon interaction at the molecular level.…”

Dendrimers Clicked Together Divergently

“…15,[36][37][38][39][40][41][42] Coincident with these developments is the increasing need for facile, costeffective methods that provide covalent connections between dendrimer generations, either convergently 43 or divergently, 44,45 and for variability in the composition and properties of the dendritic scaffold. Although many families of dendrimers have been produced, there remain opportunities for further developments, especially given the iterative growth scheme, which require efficient and versatile chemistries for the preparation of well-defined dendrimers.…”