Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Reexamination Certificate
2006-08-15
2006-08-15
Boykin, Terressa (Department: 1711)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
C252S070000, C252S074000, C252S077000, C435S006120, C528S271000, C528S288000, C528S310000, C528S313000, C528S315000
Reexamination Certificate
active
07091303
ABSTRACT:
The invention relates to a method to produce a modified hyperbranched polyesteramide, containing at least two β-hydroxylamide ester groups and optionally also a hydroxyalkylamide endgroup, wherein (a) a hydroxy-, or aminefunctional monomer, oligomer or polymer is contacted with a first molar excess of a cyclic carboxylic acid anhydride, forming a mixture of an acid functional ester, respectively an acid functional amide and a cyclic carboxylic acid anhydride; (b) the mixture is contacted with an amount of alkanediolamine, wherein the amount is a second molar excess with respect to the first molar excess. The invention further relates to a modified hyperbranched polyesteramide containing at least two β-hydroxylamide ester groups and optionally also a hydroxyalkylamide endgroup with a degree of polymerisation of more than 19, as well as the use of these polyesteramides as rheology modifier in gas-oil or in diesel.
REFERENCES:
patent: 6541599 (2003-04-01), Wang
patent: 00/56804 (2000-09-01), None
patent: 00/58388 (2000-10-01), None
Van Benthem et al., New commerically available hyperbranched polymers—for tailor made solutions:,Polymeric Materials Science and Engineering, vol. 80, Mar. 21, 1999, pp. 72-73.
Boykin Terressa
DSM IP Assets B.V.
Mayer Brown Rowe & Maw LLP
LandOfFree
Oil soluble hyperbranched polyesteramides does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Oil soluble hyperbranched polyesteramides, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Oil soluble hyperbranched polyesteramides will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3611276