Copolymers of ethylene and alkyl acrylate with improved melt-point temperatures
AssigneeChevron Chemical Company
InventorsJerry G. Latiolais, Nicholas R. Galante, J. Paul Gathright, James H. Wang
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Abstract
Disclosed are copolymers of ethylene and alkyl acrylate monomers and methods of making those copolymers. Said copolymers exhibit increased melt-point temperatures and decreased hardness over similar conventional copolymers.
Claims20
A composition comprising a homogeneous blend of a polyolefin and an ethylene-alkyl acrylate copolymer having an alkyl acrylate content of X weight percent, X being greater than ten and being based on the total weight of ethylene and alkyl acrylate in the copolymer, said copolymer having an average melt-point temperature equal to or greater than the value obtained from the expression:
- temperature (deg F.)=238-2.16X
- wherein the average melt-point temperature is about 10.degree. F. greater than a copolymer having the same alkyl acrylate content and prepared by dividing the ethylene monomer and alkyl acrylate monomer equally among reactor zones.
A composition comprising a homogeneous blend of a polyolefin and an ethylene-alkyl acrylate copolymer, wherein the copolymer has less than a 0.06 difference between the maximum loss tangent value and the minimum loss tangent value in the range 32.degree.-140.degree. F.
A composition comprising a homogeneous blend of a polyolefin and an ethylene-methyl acrylate copolymer having a methyl acrylate content of Y weight percent, Y being greater than ten and being based on the total weight of ethylene and methyl acrylate in the copolymer, said copolymer having an average melt-point temperature greater than the value obtained from the expression:
- temperature (deg F.)=248-2.9Y.
A composition comprising a homogeneous blend of a polyolefin and an ethylene-butyl acrylate copolymer having a butyl acrylate content of z weight percent, z being greater than seventeen and being based on the total weight of ethylene and butyl acrylate in the copolymer, said copolymer having an average melt-point temperature greater than the value obtained from the expression:
- temperature (deg F.)=240-2.1z
- wherein the average melt-point temperature is about 10.degree. F. greater than a copolymer having the same butyl acrylate content and prepared by dividing the ethylene monomer and butyl acrylate monomer equally among reactor zones.
A composition comprising a homogeneous blend of a polyolefin and an ethylene-butyl acrylate copolymer, wherein the copolymer has an melt-point temperature of about 206.degree. F. and has a butyl acrylate content of about 20 weight percent based on the total weight of ethylene and butyl acrylate in the copolymer.
Dependencies are inferred from the claim text.