Deformable soft molding compositions

Details Deformable soft molding compositions Deformable soft molding compositions

2004-08-20

2009-02-24

McClendon, Sanza L (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Compositions to be polymerized by wave energy wherein said...

C522S090000, C522S150000, C522S152000, C522S173000, C522S178000, C522S182000, C522S113000, C522S114000, C522S120000, C522S121000

Reexamination Certificate

active

07495034

ABSTRACT:
A curable composition and method for producing a tear resistant, yet soft and deformable in-the-ear product yielding the user greater comfort and durability. The curable composition incorporated into a hearing aid apparatus provides a deformable, yet tear resistant housing, which may be mated to a soft tip component. The hearing aid housing provides better comfort, durability and acoustic performance for a variety of ear canal shapes. The curable composition that provides these properties includes at least one urethane acrylate oligomer, at least one reactive diluent and a cure system. The composition when cured desirably produces a tear strength of at least about 75 pli and a hardness of about Shore A 60 to about 75.

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