Method of forming waterproofing material
US4215160A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 22, 1979 |
| Grant date | Jul 29, 1980 |
| Priority date | — |
| Expiry date | Jan 22, 1999 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04B1/665
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A method of preparing a preformed sheet-like waterproofing material in the form of a laminate structure of a sheet-like flexible support member having on one side thereof a flexible membrane of an adhesive bituminous composition. The method requires placing the flexible sheet-like polymeric support member in facing relationship with a forming surface, applying a coating of an adhesive bituminous composition having a temperature above the melting point of the polymeric support member to the opposite surface of the support and simultaneously cooling the forming surface at a rate at least sufficient to maintain the support member thereon below its melting point for a time at least sufficient to permit the bituminous composition to cool below the melting point of the support member. The present method alleviates the utilization of a non-structural release sheet during formation or packaging of the waterproofing composite structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.