Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From heterocyclic reactant containing as ring atoms oxygen,...
Reexamination Certificate
2005-10-25
2005-10-25
Richter, Johann (Department: 1621)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From heterocyclic reactant containing as ring atoms oxygen,...
C408S212000, C408S212000, C408S212000, C408S212000, C408S212000, C525S113000, C525S182000, C525S194000, C525S333700, C525S423000, C525S424000, C525S179000
Reexamination Certificate
active
06958382
ABSTRACT:
A process for preparing polyisobutenyl (thio)ethers by reacting a polyisobutene epoxide having at least one terminal epoxide group with itself, with other epoxides and/or with nucleophiles selected from among alcohols and thiols in the presence of a Lewis-acid compound as catalyst and/or a cationic photoinitiator with illumination is described. The side reaction of the rearrangement of the epoxide to the polyisobutenyl aldehyde is suppressed. In addition, a curable composition comprising a polyisobutene epoxide, an epoxide different therefrom and optionally a poly(thi)ol is also described.
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Lange Arno
Mach Helmut
Mijolovic Darijo
Rath Hans Peter
BASF - Aktiengesellschaft
Nwaonicha Chukwuma
Oblon, Spivak, mcClelland, Maier & Neustadt, P.C.
Richter Johann
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