Rubber for baby bottle nipples, pacifiers, and syringe plungers

Details Rubber for baby bottle nipples, pacifiers, and syringe plungers Rubber for baby bottle nipples, pacifiers, and syringe plungers

2011-04-19

2011-04-19

Cheung, William K (Department: 1762)

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S348700, C215S011100, C215S011500, C604S078000, C604S236000

Reexamination Certificate

active

07928178

ABSTRACT:
The production of a protein free synthetic polyisoprene which has both low levels of chemical impurities and good physical properties has yet to be realized. It has now been envisioned that the use of neodymium catalyzed polyisoprene will offer the combined advantages of both a clean, as well as, high cis-1,4 polymer. Synthesis of polyisoprene rubber using a neodymium based catalyst system is described.

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