Vitreous filler for plastic materials and resins and method for obtaining same
US6645627B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 14, 2002 |
| Grant date | Nov 11, 2003 |
| Priority date | — |
| Expiry date | Jun 14, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2998
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A filler (1) is envisioned which comprises glass-based granules (2) provided with a sizing composition, in which filler each of the granules (2) consists of a multiplicity of milled glass fragments (3) agglomerated together by the agency of a sizing composition (4) containing especially a compound chosen from esters of alkylsilicic acids, particularly an aminosilane. The process comprises a milling step (6) during which the glassy material is comminuted into fragments by this milling, a metering step (7) during which a mixture including the fragments (3) and the sizing composition (4) is formed and an agglomeration step (8) during which the mixture is dried so as to form granules each including a multiplicity of fragments (3) and dried parts of the sizing composition (4).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.