APAO hot melt adhesives containing a low molecular weight, functionalized, isotactic polypropylene
US9695342B2 · kind B2 · utility
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1References
4Claims
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Key dates
| Filing date | Mar 30, 2016 |
| Grant date | Jul 4, 2017 |
| Priority date | — |
| Expiry date | Mar 30, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/13
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Adding a low molecular weight (or alternatively, high melt flow rate), functionalized, isotactic polypropylene (iPP) to a hot melt adhesive (HMA), composition containing a propylene-butene-1, and/or a propylene-ethylene amorphous poly alpha olefin (APAO) copolymer, in addition to other co-adjuvants (such as a tackifier or a plasticizer), results in an APAO-based HMA that shows improved tensile strength and bonding properties, over an HMA that contains only the propylene-butene-1 and/or the propylene-ethylene APAO copolymer (with or without a tackifier and/or a plasticizer).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.