Urethane polymers that reduce the effect of polylactone...

Details Urethane polymers that reduce the effect of polylactone... Urethane polymers that reduce the effect of polylactone...

2007-01-09

2007-01-09

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...

C525S123000, C525S440030, C525S452000, C525S453000, C525S454000, C525S455000, C525S457000, C525S458000, C525S467000, C525S474000, C528S049000, C528S068000, C528S085000

Reexamination Certificate

active

10317942

ABSTRACT:
A composition comprising a reaction product of a diisocyanate, a chain extension agent having at least difunctional reactivity with an isocyanate, and a material comprising a blend of i) a primary carbamate material having at least one functional group reactive with an isocyanate and at least one primary carbamate group or a group convertible to a primary carbamate group, and ii) a reaction product of the primary carbamate material with an extending agent, wherein at least one of i) the isocyanate groups of the diisocyanate have a different reactivity in relation to each other, and ii) at least two of the groups with reactivity with an isocyanate on the chain extension agent have a different reactivity in relation to each other.

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