Surgical pressure sensitive adhesive sheet product
US4879178A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 27, 1988 |
| Grant date | Nov 7, 1989 |
| Priority date | — |
| Expiry date | May 27, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2891
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
What is disclosed are novel hot melt adhesives having pressure sensitive properties that are comprised of a combination of two acrylic-based copolymers containing the novel monomer 1(2)-methyl-3-oxa-4-oxo-5-aza-nonyl methacrylate, one of the copolymers being a low glass transition temperature (Tg) compolymer and the other a high Tg copolymer and which hot melt adhesives, by means of reversible hydrogen bond formation and dissociation, possess the reversible properties of providing a strong cohesive strength at ambient temperature but also having a melt viscosity at elevated coating temperatures such that it can be used in hot melt coating equipment; a process for making said hot melt adhesives; and a process for making adhesive tapes and bandages using said adhesives.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.