Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From sulfur-containing reactant
Reexamination Certificate
2005-09-06
2005-09-06
Truong, Duc (Department: 1711)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From sulfur-containing reactant
C528S387000, C528S373000, C528S377000, C528S482000, C528S486000, C568S021000
Reexamination Certificate
active
06939941
ABSTRACT:
A process is provided for the manufacture of liquid polysulfide polymers. In particular, the process allows for making the liquid form of the polysulfide polymer directly and eliminates the need to first make a solid polysulfide polymer and then convert it to a liquid.
REFERENCES:
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Yoshio Imai et. al., “Synthesis of Aliphatic Polysulfides by Phase-Transfer-Catalyzed Polycondensation of Dibromoalkanes with Dithiols,” Journal of Polymer Science: Polymer Letters Edition, v. 17, p. 579-583, 1979.
Mitsuru Ueda, et. al., “Synthesis of Poly(aliphatic sulfides) by Polycondensation of Sodium Sulfide with Dibromoalkanes in the Presence of quarternary Onium Salts,” Macromolecules, v. 15, p. 248-251, 1982.
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Gilmore John Richard
Halpern Marc Edward
Hobbs Steven John
Mundle Thomas Dennis
Potts Keith Bradley
DLA Piper Rudnick Gray Cary US LLP
Toray Fine Chemicals Co., Ltd.
Truong Duc
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