Laminating adhesive for retort pouches
US7553914B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 21, 2008 |
| Grant date | Jun 30, 2009 |
| Priority date | — |
| Expiry date | Apr 21, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31511
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method for producing a two-component bonding agent composition. The method uses a mixture whose first component contains: (i) 50 to 98 wt % of a hydroxy-terminated polyester having a hydroxyl number from 50 to 350 and hydroxyl functionality from 2 to 3; (ii) 1 to 30 wt % of an epoxy resin having an epoxy equivalent weight from 500 to 4000; and (iii) 1 to 20 wt % of an organic alkoxysilane containing C1-C4 alkoxy groups. The second component contains a multi-functional isocyanate having an isocyanate functionality from 1.8 to 4; wherein the second component is present relative to the first component at a molar ratio of NCO/OH groups of 0.9:1 to 3:1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.