Thermoplastic foaming agent
US9556318B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 6, 2013 |
| Grant date | Jan 31, 2017 |
| Priority date | — |
| Expiry date | Sep 20, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2207/07
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention describes a foamable thermoplastic mixture, comprising (A) at least one thermoplastic polymer selected from ethylene-vinyl acetate copolymer (EVA), ethylene methyl acrylate copolymer (EMA), ethylene butyl acrylate copolymer (EBA), ethylene-hexene copolymer, ethylene-butene copolymer, ethylene-octene copolymer, polyethylene (PE), polypropylene (PP) and ethylene-propylene copolymer, (B) at least one long chain branched polymer as a foam stabilizer selected from ethylene-vinyl acetate copolymer (EVA), ethylene methyl acrylate copolymer (EMA), ethylene butyl acrylate copolymer (EBA), ethylene-hexene copolymer, ethylene-butene copolymer, ethylene-octene copolymer, polyethylene (PE), polypropylene (PP) and ethylene-propylene copolymer and (C) at least one chemical blowing agent, wherein the long chain branched polymer (B) is present in an amount of 1 to 30 wt. % relative to the total weight of thermoplastic polymer (A) and long chain branched polymer (B), and at least one of the following distinguishing features applies to the thermoplastic polymer (A) and the long chain branched polymer (B): 1) the value of the melt flow index (MFI) of the long chain branched polymer (B) (…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.