Photocurable prepreg sheet for waterproofing, method and apparatus for production of prepreg sheet, and waterproofing method using the sheet
US6316089A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 4, 1998 |
| Grant date | Nov 13, 2001 |
| Priority date | — |
| Expiry date | Dec 4, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24995
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A photocurable prepreg sheet for waterproofing includes PA1 (1) a fiber-reinforced resin layer which comprises a sheet-shaped inorganic or organic fibrous reinforcing material impregnated with a resin composition comprising: PA2 (A) an unsaturated polyester resin and/or vinyl ester resin: PA3 100 parts by weight, and PA2 (B) at least two photopolymerization initiators having photosensitivity in different wavelength ranges from ultraviolet range to near infrared range: PA3 0.01 to 10 parts by weight, and which is treated with light of a specific wavelength to thereby undergo prepolymerization which causes at least one of the polymerization initiators and radical-polymerizable unsaturated groups to remain partially intact; and PA1 (2) film which covers an upper surface and a back surface of the fiber-reinforced resin layer. The waterproofing material does not require resin impregnation work, can be installed within a short time with successful resin setting, is free form the risk and cumbersome procedure which are caused when a peroxide catalyst is directly handled, and permits adjustment of the pot life. Also disclosed are method and apparatus for production of the prepreg sheet, an…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.