Adhesive compositions
US3994764A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 13, 1975 |
| Grant date | Nov 30, 1976 |
| Priority date | — |
| Expiry date | Jun 13, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31522
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Improved, fast curing adhesives, with and without fillers, and articles bonded therewith are provided. The adhesive comprises a first part made up of a thermoplastic, non-reactive polyurethane polymer dissolved in an addition polymerizable combination of an acrylic or methacrylic monomer, a copolymerizable monomer containing at least one free carboxylic acid group, and a non-activated free radical addition polymerization catalyst system, and a second part comprising an activator for the free radical catalyst system. Exemplary of such a formulation is a first part made up of a polyester urethane, e.g., the condensation polymer of polyethylene adipate and toluene di-isocyanate containing no free isocyanate, dissolved in a mixture of acrylic acid and methyl methacrylate, each of the three components being present in equal amounts. About two weight percent benzoyl peroxide and about 0.1 weight percent hydroquinone are dissolved in the mix. The resulting formulation has a high degree of relative stability in the absence of an activator for the benzoyl peroxide. An appropriate second part, i.e., activator, comprises a tertiary amine, such as N,N-dimethyl aniline, diethyl aniline, N,N-dim…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.