Compositions containing ethylene polymers
View Patent ↗Disclosed are compositions which include an ethylene polymer derived from at least one polar monomer with one or more ester groups, which polymerize with ethylene, (e.g., a copolymer derived from ethylene and vinyl acetate or a copolymer derived from ethylene and n-butyl acrylate) and a rosin ester. The rosin ester can have a low hydroxyl number (e.g., a hydroxyl number six or five or less), a low acid number (e.g., an acid number of ten or less), a low PAN number (e.g., a PAN number of eight or less), or combinations thereof. The compositions can exhibit improved viscosity stability and/or color stability and/or a decreased amount of char particle formation upon thermal aging.
1. A composition comprising,
(a) a polymer derived from ethylene polymer derived from at least one polar monomer with one or more ester groups, which polymerize with ethylene, and
(b) a rosin ester having a hydroxyl number and an acid number,
wherein the rosin ester has a hydroxyl number of six or less, and
wherein the sum of the hydroxyl number and the acid number is eighteen or less, and
wherein the rosin ester has a weight average molecular weight of from 800 g/mol to 2000 g/mol.
2. The composition of claim 1 , wherein the rosin ester has a hydroxyl number of five or less.
3. A composition comprising,
(a) ethylene polymer derived from at least one polar monomer with one or more ester groups, which polymerize with ethylene, and
(b) a rosin ester having a hydroxyl number and an acid number,
wherein the sum of the hydroxyl number and the acid number is ten or less, and
wherein the rosin ester has a weight average molecular weight of from 800 g/mol to 2000 g/mol.
4. The composition of claim 3 , wherein the rosin ester has a hydroxyl number of six or less.
5. A composition comprising:
(a) An ethylene polymer derived from at least one polar monomer with one or more ester groups, which polymerize with ethylene, and
(b) a rosin ester,
wherein the rosin ester has a hydroxyl number of six or less and an acid number of fifteen or less, and
wherein the rosin ester has a weight average molecular weight of from 800 g/mol to 2000 g/mol.
6. The composition of claim 5 , wherein the rosin ester has a hydroxyl number of five or less.