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US 5,183,862 AGranted
Hyperbranched polyesters
AssigneeE. I. Du Pont de Nemours and Company
InventorGarret D. Figuly
Life of this patent
Estimating the term…
Abstract
This invention relates to hyperbranched, functional polyesters.
Claims5
A capped polyester prepared by capping the X and Y functions of a soluble hyperbranched polyester having at least 1 branch per 10 monomer units prepared by conventional polycondensation of one or more monomers of the formula:
- XR.sup.2.sub.n
- wherein:
- R.sup.1 is a divalent C.sub.1-12 hydrocarbyl radical which is linear or branched aliphatic, alicyclic, aromatic or mixed aromatic-aliphatic;
- R.sup.2 is a C.sub.1-12 hydrocarbyl radical having a valence of (n+1), which radical is linear or branched aliphatic, alicyclic, aromatic or mixed aromatic-aliphatic, or R.sup.2 is R.sup.3 N wherein R.sup.3 is defined as for R.sup.1 ;
- either of R.sup.1, R.sup.2 or R.sup.3 optionally also containing substituents that are unreactive under processing conditions;
- X and Y are terminal functions selected from --CO.sub.2 R' and --OR" wherein R.sup.1 is H or C.sub.1-12 alkyl and R" is H or OC(O)R;
- m is 0 or 1;
- and
- n is an integer and is at least 2;
- with the provisos that:
- (i) both X and Y are not --CO.sub.2 R' or --OR";
- (ii) no X or Y function is adjacent to another X or Y function;
- (iii) when R.sup.2 is an aliphatic hydrocarbyl radical, Y is --CO.sub.2 R';
- and
- (iv) when R.sup.2 is R.sup.3 N, m is 1;
- with a monofunctional capping agent.
13 more elements
A capped polyester prepared by capping the X and Y functions of a soluble hyperbranched polyester having at least one branch per 10 monomer units, said polyester being prepared by conventional polycondensation of one or more monomers of the formula:
- XR.sup.2.sub.n
- wherein:
- R.sup.1 is a divalent C.sub.1-12 hydrocarbyl radical which is linear or branched aliphatic, alicyclic, aromatic or mixed aromatic-aliphatic;
- R.sup.2 is a C.sub.1-12 hydrocarbyl radical having a valence of (n+1), which radical is linear or branched aliphatic;
- either of R.sup.1 or R.sup.2 optionally also containing substituents that are unreactive under processing conditions;
- X is CO.sub.2 R';
- Y is OR", wherein R' is H or C.sub.1-12 alkyl and R" is H or OC(O)R';
- m is 0 or 1;
- and
- n is an integer and is at least 2;
- with the proviso that no X or Y function is adjacent to another X or Y function, with a monofunctional capping agent.
8 more elements
Dependencies are inferred from the claim text.