Unlock instant, AI-driven research and patent intelligence for your innovation.

Epoxy resin formulations

A technology of epoxy resin and novolac epoxy resin, which is applied in the direction of printed circuit, electrical components, etc., and can solve the problems such as difficulty in meeting specifications

Inactive Publication Date: 2010-11-03
BLUE CUBE IP
View PDF12 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] This specification is difficult to achieve with standard brominated epoxy resin formulations due to the tendency of bromide to decompose at these temperatures

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Epoxy resin formulations
  • Epoxy resin formulations
  • Epoxy resin formulations

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0200] A curable epoxy resin composition is prepared by mixing:

[0201] 100 ± 5 parts by weight of DEN438, a semi-solid epoxy novolak resin, which is the reaction product of epichlorohydrin and novolac resin, and is commercially available from the Dow Chemical Company;

[0202] 33 ± 3 parts of phosphorus-containing novolak epoxy resin, which is a bisphenol-A-novolak resin modified by methyl-dioxaphosphaphenanthrene-oxide;

[0203] 32 parts of diaminodiphenylsulfone;

[0204] 4±0.5 parts of 2-phenylimidazole accelerator;

[0205] 25 ± 5 parts Dowanol TM PM, a propylene glycol methyl ether;

[0206] 1 ± 0.5 parts boric acid; and

[0207] 20 ± 5 parts methyl ethyl ketone.

[0208] The exact ratios of the various components are given in the table below:

[0209]

[0210] The varnish formulation was used to impregnate a glass braid (style 7628 from Porcher / finish 0731), passing the impregnated glass braid through a horizontal processor oven (Caratsch, oven 3 meters long)...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
glass transition temperatureaaaaaaaaaa
glass transition temperatureaaaaaaaaaa
softening pointaaaaaaaaaa
Login to View More

Abstract

A curable halogen-free epoxy resin composition comprising from 40 to 80 percent by weight of a phenol aldehyde condensation product, from 10 to 40 percent by weight of a phosphorous-containing phenolic epoxy resin, and from 10 to 40 percent by weight of an aromatic hardening agent having a sulphone group and an amine group. A prepreg and laminate can be formed from this composition.

Description

Background of the invention [0001] The present invention relates to epoxy resin formulations, and in particular, the present invention relates to halogen-free curable epoxy resin formulations and cured epoxy resin formulations having a maximum operating temperature greater than 200°C. [0002] Metal laminates are increasingly being used in place of organic matrix materials for heat dissipation. Thermal control is important in the automotive industry as well as in high speed computer applications. Accordingly, there is a continuing need for laminates that can operate at elevated temperatures, such as those of an automotive engine compartment. The use of lead-free solders also leads to the need for electrical laminates that can operate at higher temperatures. As a general principle, it is desired that the glass transition temperature of the laminate exceed the maximum operating temperature to which the laminate will be subjected. [0003] Recent developments in automotive ele...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/30C08G59/32C08G59/50
CPCC08G59/504H05K1/0326C08G59/3236C08G59/304C08J5/24
Inventor 伯恩德·霍维尔
Owner BLUE CUBE IP