Proplylene-based copolymer product
US11725100B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 13, 2020 |
| Grant date | Aug 15, 2023 |
| Priority date | — |
| Expiry date | May 6, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2207/20
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Heterophasic polypropylene copolymer compositions and methods of making the same include a matrix phase of a random polypropylene-based copolymer; and an elastomeric rubber phase dispersed in the matrix phase, wherein the elastomeric rubber phase includes propylene and one or more comonomers and has a viscosity index ratio, relative to a viscosity index of the random polypropylene-based copolymer, that ranges from 0.3 to 1.1; and wherein an average particle size of the dispersed elastomeric rubber phase is less than 300 nm. Methods include dispersing an elastomeric rubber phase that includes propylene and one or more comonomers into a matrix phase of a random polypropylene-based copolymer, wherein the elastomeric rubber phase has a viscosity index ratio, relative to a viscosity index of the random polypropylene-based copolymer that ranges from 0.3 to 1.1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.