Process for producing an architectural precast concrete panel
US4049874A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 14, 1976 |
| Grant date | Sep 20, 1977 |
| Priority date | — |
| Expiry date | Jan 14, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31667
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention relates to a process for producing a large architectural precast concrete panel for use in outside walls and applicable to the curtain wall technique of architecture, wherein a resinous substance and an inorganic material are placed in a mold, then a hydraulic cement composition is placed on the layer of above mixture. The polymerization of the resinous substance and the hydration of the cement composition are carried out in the mold simultaneously. A particularly preferred process employs the following critical conditions: 1. The viscous methyl methacrylate syrup is one obtained by mixing about 100 parts by weight of viscous methyl methacrylate syrup with from about 0.5 to about 15 parts by weight of a radical polymerizable cross-linking monomer having .alpha., .beta.-unsaturated groups to obtain a resin solution; 2. The particle size of the aggregates is between 0.6 and 15mm diameter; 3. The thickness of the layer of the aggregates and the thermosetting acryl resin is between about 10 and 30mm; 4. The weight ratio of parts of water to parts of the cement in the hydraulic cement composition is about 50:60 to 40:50, respectively; 5. The thickness of the hydrau…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.