Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From reactant having at least one -n=c=x group as well as...
Reexamination Certificate
2007-09-11
2007-09-11
Sergent, Rabon (Department: 1711)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From reactant having at least one -n=c=x group as well as...
C252S182200, C528S073000, C528S080000, C528S083000, C544S222000, C560S330000, C564S044000, C564S045000
Reexamination Certificate
active
10489913
ABSTRACT:
A polyisocyanate composition comprising an allophanate group, which is obtained from an aliphatic diisocyanate(s), wherein in a state substantially free of a solvent and the aliphatic diisocyanate(s),(i) the content of components having a molecular weight of 700 or less is 20-60 weight %,(ii) the ratio of weight average molecular weight to number average molecular weight is 1.20-5.00,(iii) the ratio of viscosity (unit: mPa·s) of the polyisocyanate composition at 25° C. to the number average number of functional groups of isocyanate groups is represented by the following expression:in-line-formulae description="In-line Formulae" end="lead"?viscosity(mPa·s)
umber average number of functional groups≦240.in-line-formulae description="In-line Formulae" end="tail"?
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Naoi Kunio
Watanabe Shinichiro
Asahi Kasei Chemicals Corporation
Sergent Rabon
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