Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From aldehyde or derivative thereof as reactant
Reexamination Certificate
2006-04-18
2006-04-18
Acquah, Samuel A. (Department: 1711)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From aldehyde or derivative thereof as reactant
C528S227000, C528S249000, C528S403000, C525S472000
Reexamination Certificate
active
07030207
ABSTRACT:
The invention is to provide a polymer, having a high affinity to water, is liquid in spite of being a polymer, simultaneously possesses also a thermal stability and is suitably used as a heating medium or a lubricant. It is the polyacetal (co)polymer, being liquid at room temperature, prepared by copolymerizing (A) 75 to 100 mol % of 1,3-dioxolane and (B) 25 to 0 mol % of trioxane and having the total amount of terminal groups of 15 to 300 mmol/kg and an amount of a hemiformal terminal group of 80 mmol/kg or less.
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Prausnitz et al, “Liquids”, Encyclopaedia Brittannica Online, pp. 1-2.
Kawaguchi Kuniaki
Nakao Hiroaki
Tajima Yoshihisa
Acquah Samuel A.
Nixon & Vanderhye P.C.
Polyplastics Co. Ltd.
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