Sprayable hot melt adhesives
US6582762B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 20, 2001 |
| Grant date | Jun 24, 2003 |
| Priority date | — |
| Expiry date | May 13, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2666/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
This invention relates to a process for atomizing, spiral spraying, oscillation spraying or melt blowing propylene copolymers onto a substrate comprising selecting a poly-alpha olefin inter-polymer comprising:A) from 60 to 94% of units derived from an alpha mono-olefin having from 3 to 6 carbon atoms andB) from 6 to 40 mol % of units derived from ethylene or one or more other mono-olefins having from 4 to 10 carbon atoms and at least one carbon atom more than A); andC) optionally from 0 to 10 mol % of units derived from another copolymerizable unsaturated hydrocarbon, different from A) and B);wherein the inter-polymer has:i) an Mw/Mn of 6 or less;ii) a storage modulus G′, determined upon cooling, intersecting a value of 0.3 M Pa at a temperature of less than 85° C.;iii) a G″/G′ ratio of 18 or more when G′ is 10 Pa when measured at a frequency of 1 hz; andiv) a viscosity of 5000 mPa·sec or less at 190° C., andatomizing, spiral spraying, oscillation spraying or melt blowing the inter-polymer into a substrate.Blends of the above copolymers can also be used herein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.