Efficient halogen-free flame retardant masterbatch for polypropylene and preparation method and use thereof
US10400088B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 28, 2015 |
| Grant date | Sep 3, 2019 |
| Priority date | — |
| Expiry date | Jun 5, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2310/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention provides an efficient halogen-free flame retardant masterbatch for polypropylene, which comprises following raw materials in percentage by weight: 30˜40% of ammonium polyphosphate; 10˜20% of pentaerythritol phosphate; 15˜25% of melamine; 5˜15% of bisphenol A bis(diphenyl phosphate); 10˜30% of microporous polypropylene; 0.1˜1% of pentaerythritol stearate; 0.1˜0.5% of antioxidant 1010; and 0.1˜0.5% of antioxidant 168. Said microporous polypropylene is particles with a size of 3˜5 mm, cell size on a surface of the particle is 10˜100 μm, and cell density is more than 105 cells/cm3. The efficient halogen-free flame retardant masterbatch for polypropylene prepared by the invention has several characteristics of easy dispersing, easy processing, high flame retardant efficiency and low production cost, and it can be widely used in the production of flame retardant polypropylene materials for extrusion, injection molding and membrane blowing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.