Acid modified adhesive composition
US4959405A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 2, 1989 |
| Grant date | Sep 25, 1990 |
| Priority date | — |
| Expiry date | Jun 2, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09J4/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
It has been discovered that by adding one or more strong organic carboxylic acids to conventional acrylate and/or methacrylate based adhesive compositions, the bonding characteristics thereof change dramatically. Thermoplastic materials whose bondability is most dramatically enhanced by the compositions of the present invention are nylon and blends of nylon and nylon-like materials with other polymers. Thermoset materials which exhibit dramatically enhanced bondability comprise homogeneous materials such as epoxies, and composite materials such as polyesters, urethanes, and/or epoxies, containing glass, minerals, and the like, which are polar or have hydrogen bonding capability. The present invention thus utilizes acrylate and/or methacrylate based adhesive compositions as a base material. To this base material is added an effective amount of one or more strong organic carboxylic acids, e.g., acids having a relatively high dissociation constant (K.sub.d or K.sub.ld). It has further been discovered that, the addition of water to these acids can increase their effectiveness, apparently through partial or enhanced solubility, which is believed to aid in the dissociation thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.