Injection-moldable transparent thermoplastic elastomer

Details Injection-moldable transparent thermoplastic elastomer Injection-moldable transparent thermoplastic elastomer

2006-01-10

2006-01-10

Mulcahy, Peter (Department: 1713)

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

C524S481000, C524S505000, C215S011100

Reexamination Certificate

active

06984688

ABSTRACT:
A plasticized HSBC blended with polypropylene and free of a filler material which adversely affects clarity, provides an injection-moldable composition for an article required to have specific properties, namely, tensile strength in the range from about 4.13 to 8.96 MPa (600 to 1300 psi); tear strength in the range from about 21 to 52.6 N/mm (120 to 300 lbs/in); softness in the range from about 45 but less than 65 Shore A; and haze less than 20%, measured by ASTM D1003 using a BYK Gardner Micro Tri-gloss 4525 meter; and it is essential that all of these properties, along with the physical dimensions of the molded article, remain substantially unchanged after immersion of the article in boiling water for 1 hour. Such a composition is may be injection molded to form a nipple for feeding an infant, or a teething ring, or goggles for a diver, and the articles are sterilizable and recyclable.

REFERENCES:
patent: 4814375 (1989-03-01), Esposito
patent: 5544766 (1996-08-01), Dunn et al.
patent: 5777031 (1998-07-01), Djiauw et al.
patent: 6106011 (2000-08-01), Masubuchi et al.
patent: 6399696 (2002-06-01), Toyosawa et al.
patent: 8 176368 (1996-09-01), None
patent: 2002348433 (2002-04-01), None

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