Hyperbranched polymers
AssigneeDsm IP Assets B.V.
InventorsHenricus Johannes Arts, Franciscus Johannes Marie Derks, Wendy Hyett, Stijn Witters
Life of this patent
Estimating the term…
Abstract
There is disclosed certain hyperbranched polyester amides with a cloud point of at least 50° C. in water with end groups selected from: two or more i] tertiary amine functional end groups ii) ammonium functional end groups, iii) polyalkylene glycol functional end groups; iv) quaternary ammonium zwitterionic end groups and/or v) other ionic groups (such as phosphate or sulfate), that are useful in various end uses such as a flocculant.
Claims11
A hyperbranched polyester amide having a cloud point of at least 50° C. in BBRINE where the polyester amide comprises at least one end group thereon selected from:
- two or more:
- i) non-cyclic tertiary amine functional end groups
- ii) quaternary ammonium functional end groups,
- iii) polyalkylene glycol functional end groups;
- iv) quaternary ammonium zwitterionic end groups, and/or
- v) phosphate end groups
A hyperbranched polyester amide as claimed in any preceding claim, which has a cloud point of at least 70° C. in BRINE and where the at least one end group comprises
- two or more
- tertiary amine functional end groups substituted by C1-4alkyl
- tertiary amine groups that are protonated
- polyethylene glycol groups (EO groups)
- betaïne-type functional end groups represented by Formula 1:
- where R1 and R2 independently denote optionally substituted C1-6hydrocarbo groups, preferably C1-4hydrocarbyl groups, more preferably are both methyl.
A hyperbranched polyester amide as claimed in any preceding claim, which comprises cationic functional groups thereon and one or more carboxylate counter anion(s) obtained and/or obtainable from at least one organic (mono or poly) carboxylic acid (including acidic and/or hydrogen salts thereof).
A hyperbranched polyester amide as claimed in the preceding claim which comprises one or more carboxylate counter ion(s) obtained and/or obtainable from citric acid and/or any suitable acid salt thereof.
A hyperbranched polyester amide as claimed in any preceding claim comprising a core obtained and/or obtainable from hexahydrophthalic anhydride.
A hyperbranched polyester amide as claimed in any preceding claim, which has a cloud point of at least 100° C. in BRINE.
A hyperbranched polyester amide as claimed in any preceding claim comprising a core obtained and/or obtainable from at least one hexahydrophthalic anhydride, at least one cationic end group and at least one citrate counter anion, where the polyester amide has a cloud point of at least 100° C. in BRINE.
Dependencies are inferred from the claim text.