Patent · US Expired

Electrical or electronic components encapsulated with liquid epoxy resins containing a mixture of wollastonite and calcite fillers

US6030713A · kind A · utility

5Cited by

7References

16Claims

0Family size

Assignees

Ciba Specialty Chemicals Corporation · US
Robert Bosch GmbH · DE

Inventors

Werner Hollstein · Schliengen, DE
Werner Pfander · Fellbach, DE
Irene Jennrich · Winnenden, DE

Key dates

Filing date	Nov 2, 1998
Grant date	Feb 29, 2000
Priority date	—
Expiry date	Nov 2, 2018

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/12528
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Epoxy resin casting compositions comprising PA1 (a) a liquid aromatic glycidyl or .beta.-methylglycidyl ether or a liquid mixture of several aromatic glycidyl or .beta.-methylglycidyl ethers containing on average more than one glycidyl ether group per molecule, PA1 (b) one or more than one acid hardener for the glycidyl ether, PA1 (c) a curing accelerator, PA1 (d) a filler mixture containing calcite and wollastonite in an amount from 40 to 60% by weight, based on components (a), (b) and (d), and as optional components, PA1 (e) customary additives for epoxy resin casting compositions are suitable in particular for coating or encapsulating electrical or electronic components and, more particularly, electrical ignition coils.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.