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Process for preparing cured epoxy composites

A composite material, curing heat technology, used in conductive coatings, devices that apply liquid to surfaces, electrical equipment enclosures / cabinets / drawers, etc., can solve problems such as difficulty in fine-tuning filters

Active Publication Date: 2014-11-19
DOW GLOBAL TECH LLC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The non-linear change in size in all directions will make it difficult to fine tune the filter to function correctly

Method used

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  • Process for preparing cured epoxy composites
  • Process for preparing cured epoxy composites
  • Process for preparing cured epoxy composites

Examples

Experimental program
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Effect test

Embodiment 1-18 and comparative example A and B

[0160] Examples and comparative examples of epoxy composite compositions of the present invention are shown in Tables I-III. The mixing, casting and curing process of the epoxy composite composition is generally carried out as follows.

[0161] General procedure

[0162] The required amount of filler was dried overnight in a vacuum oven at a temperature of about (~) 70°C. Usually contains FORTEGRA TM Epoxy resins with toughener and anhydride hardener were individually pre-warmed to ~60°C. A wide mouth plastic container is filled with the specified amount by weight of warmed epoxy resin, warmed anhydride hardener, optional BYK-A 525 and / or BYK W9010 and 1-methylimidazole, which is added to Manually swirl in warm filler that may contain FR additives before. The contents of the container are then placed in the FlackTek SpeedMixer TM Mixing was performed using multiple cycles from about 800 to about 2000 rpm, duration -1-2 minutes.

[0163] The mixed formulations were fill...

Embodiment 19

[0174] In this Example 19, the formulation of the invention (the formulation of Example 1) was cured to form an epoxy composite which was then plated with a copper layer according to the general plating procedure and as described in Table IV below:

[0175] General Plating Procedure

[0176] Processes for plating the epoxy composite substrates of the present invention may include various techniques for rendering the surface receptive to metallization. In general, epoxy substrates can be metallized by a process that first involves sequential exposure to a material containing the composition, increased attack in a subsequent etch step, followed by exposure to an etch step followed by exposure to substantially remove Residues from the etching step.

[0177]The first step, often referred to as "solvent swelling," utilizes a "swelling agent" that may include materials such as solvents and / or basic materials such as alkali metal hydroxides. The second step, often referred to as ...

Embodiment 20 and comparative example C

[0190] RF Filter Sample Fabrication and Testing Procedures

[0191] Two RF filter cartridge samples (Example 20 and Comparative Example C) were prepared as follows:

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Abstract

A process for preparing a cured composite material useful for radio frequency filter applications comprising the steps of: (a) providing a curable thermoset epoxy resin composition comprising (i) at least one epoxy resin; (ii) at least one toughening agent; (iii) at least one hardener; and (iv) at least one filler; (b) curing the curable thermoset epoxy resin composition of step (a) to form a cured composite; wherein the curable thermoset epoxy resin composition upon curing provides a cured composite product with a balance of properties comprising Tg, coefficient of thermal expansion, tensile strength, thermal conductivity; and having a density of less than 2.7 g / cc; and (c) coating at least a portion of the surface of the cured composite of step (b) with an electrically conductive metal layer to form a metalized coating on at least a portion of the surface of the cured composite. The cured composite material may be useful as a radio frequency cavity filter body housing for radio frequency filter applications.

Description

technical field [0001] The present invention relates to metallized epoxy resin composites and methods of making said metallized epoxy resin composites, said composites being useful in a variety of applications, such as making cell tower communication equipment components such as radio frequency filters . Background technique [0002] In order to support new services and increasing number of users, the global bandwidth demand is expected to increase year by year, thus moving wireless systems to higher frequency bands. There is a trend in the industry to move electronic equipment from a base station to the top of a cell tower for that base station (ie, tower-top electronics). Installing and maintaining antennas and radio remote heads on cell towers is expensive. Therefore, there is a need for lightweight cell tower infrastructure and supporting equipment. [0003] Radio frequency (RF) filters are key components of remote radio head (RRH) devices. RF filters are used to rem...

Claims

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Application Information

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IPC IPC(8): C08L63/00C08L71/02C08L53/00
CPCC08L63/00C08L71/02C08L51/00B05D3/007C08L63/10C08L2201/02C08L2205/02C09D5/24H05K5/00H05K7/2039
Inventor L·付M·埃塞格希尔W·J·哈里斯M·W·贝斯R·F·伊顿C·J·科米克B·P·尼斯
Owner DOW GLOBAL TECH LLC
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