Polyethylene and polypropylene block copolymers
AssigneesCornell University, Regents of the University of Minnesota
InventorsGeoffrey Coates, James Eagan, Anne Lapointe, Frank S. Bates
Life of this patent
Estimating the term…
Abstract
A semicrystalline multiblock copolymer includes alternating blocks of semicrystalline isotactic polypropylene (iPP) and semicrystalline polyethylene (PE), having a block arrangement according to formula (I): (iPPw)p(PEx)(iPPy)m(PEz)n (I), wherein p is 0 or 1; m is 0 or 1; n is 0 or 1; the sum of p, m, and n is 1, 2, or 3; and the sum of w, x, y, and z is greater than or equal to 40 kg/mol, with the provisos that: when m and n are 0, the sum of w and x is greater than or equal to 140 kg/mol; and when p and n are 0, the sum of y and x is greater than or equal to 140 kg/mol. Related compositions and methods are also provided.
Claims23
A semicrystalline multiblock copolymer comprising alternating blocks of semicrystalline isotactic polypropylene (iPP) and semicrystalline polyethylene (PE), having a block arrangement according to formula (I):
- (iPPw)p(PEx)(iPPy)m(PEz)n (I),
- wherein
- block (PEx) consists of formula
- block (PEz) consists of formula
- p is 0 or 1;
- m is 0 or 1;
- n is 0 or 1;
- the sum of p, m, and n is 1, 2, or 3;
- and
- the sum of w, x, y, and z is greater than or equal to 40 kg/mol, with the provisos that:
- when m and n are 0, the sum of w and x is greater than or equal to 140 kg/mol;
- and
- when p and n are 0, the sum of y and x is greater than or equal to 140 kg/mol.
A semicrystalline multiblock copolymer comprising alternating blocks of semicrystalline isotactic polypropylene (iPP) and semicrystalline polyethylene (PE), wherein the copolymer is a tetrablock copolymer having a block arrangement according to formula (Id):
- iPPwPExiPPyPEz, (Id),
- wherein
- the sum of w, x, y, and z is greater than or equal to 40 kg/mol.
A semicrystalline multiblock copolymer comprising alternating blocks of semicrystalline isotactic polypropylene (iPP) and semicrystalline polyethylene (PE), having a block arrangement according to formula (I):
- (iPPw)p(PEx)(iPPy)m(PEz)n (I),
- wherein
- p is 0 or 1;
- m is 0 or 1;
- n is 0 or 1;
- the sum of p, m, and n is 1, 2, or 3;
- and
- the sum of w, x, y, and z is greater than or equal to 40 kg/mol, with the provisos that:
- when m and n are 0, the sum of w and x is greater than or equal to 140 kg/mol;
- and
- when p and n are 0, the sum of y and x is greater than or equal to 140 kg/mol, and
- wherein said semicrystalline multiblock copolymer includes one or more blocks in addition to those of formula (I).
Dependencies are inferred from the claim text.