IP Library › Granted Patent US 8,611,568
Granted Patent B2
US 8,611,568 · App. 13/422,339 · Granted Dec 17, 2013

Hydrophobic ABS plastics material for casings

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Quick Facts
Patent No.
US 8,611,568
App. No.
13/422,339
Granted
Dec 17, 2013
Kind
B2
Abstract

A hydrophobic ABS plastics material is formed from an acrylonitrile-butadiene-styrene copolymer (ABS) plastic feed stock and a silicone additive. The hydrophobic ABS plastics material is used to produce a casing material, and also an electrical device. The hydrophobic ABS plastics material is ideally suited for protecting sensitive electronic components from moisture via a casing.

Claims (15)

1. A hearing aid, comprising:

a hearing aid casing formed from an acrylonitrile-butadiene-styrene copolymer (ABS) plastic and a silicone additive;

said silicone additive containing a polyorganosiloxane having side chains which have been selected independently of one another from the group consisting of unsubstituted alkyl group, unsubstituted alkenyl group, substituted alkyl group, and substituted alkenyl group; and

said substituted alkyl group or said substituted alkenyl group having at least one substituent selected from the group consisting of a hydroxy group (—OH), an epoxy group, a primary amino group (—NH2), and a secondary amino group (—NHR).

2. The hearing aid according to claim 1 , wherein a proportion by weight of said silicone additive is ≦20% by weight.

3. A hearing aid, comprising:

a hearing aid casing formed from an acrylonitrile-butadiene-styrene copolymer (ABS) plastic and a silicone additive;

said silicone additive containing a polyorganosiloxane having side chains which have been selected independently of one another from the group consisting of an unsubstituted alkyl group, an unsubstituted alkenyl group, a substituted alkyl group, and a substituted alkenyl group;

a molecular weight of said polyorganosiloxane is ≦5,000; and

said substituted alkyl group or said substituted alkenyl group has at least one substituent selected from the group consisting of a hydroxy group (—OH), an epoxy group, a primary amino group (—NH2), and a secondary amino group (—NHR).

4. A hearing aid, comprising:

a hearing aid casing formed from an acrylonitrile-butadiene-styrene copolymer (ABS) plastic and a silicone additive;

said silicone additive containing a polyorganosiloxane having side chains which have been selected independently of one another from the group consisting of an unsubstituted alkyl group, an unsubstituted alkenyl group, a substituted alkyl group, and a substituted alkenyl group;

a number of Si—O— units in said polyorganosiloxane is ≦70; and

said substituted alkyl group or said substituted alkenyl group has at least one substituent selected from the group consisting of a hydroxy group (—OH), an epoxy group, a primary amino group (—NH2), and a secondary amino group (—NHR).