Hot melt adhesive composition based on a blend of propylene copolymers prepared using single-site catalysts and methods for using same
US10011744B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 13, 2017 |
| Grant date | Jul 3, 2018 |
| Priority date | — |
| Expiry date | Jan 13, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2314/06
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A hot melt adhesive composition comprises a polymer blend based on a low molecular weight semicrystalline propylene based polymer and a high molecular weight essentially amorphous propylene based polymer, both of which are prepared by using single-site catalysts. The composition further contains a compatible tackifier, a plasticizer, an antioxidant, and optionally a wax, a filler, a colorant, a UV absorber, another polymer, or combinations thereof. The hot melt composition has low viscosity ranging from 500 mPa·s to 35,000 mPa·s at 177° C. and is useful for a variety of industrial applications where bonding of low surface energy substrates is encountered, including disposable nonwoven hygienic articles, labeling and other assembly applications. Particularly preferred applications include nonwoven disposable diaper and feminine sanitary napkin construction, diaper and adult incontinent brief elastic attachment, diaper and napkin core stabilization, diaper backsheet lamination, industrial filter material conversion, and surgical gown and surgical drape assemblies.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.