Compositions – Compositions containing a single chemical reactant or plural... – Organic reactant
Reexamination Certificate
2005-01-19
2008-10-21
Jagannathan, Vasu (Department: 1796)
Compositions
Compositions containing a single chemical reactant or plural...
Organic reactant
C252S182180, C252S182230, C252S182280, C252S183110
Reexamination Certificate
active
07438830
ABSTRACT:
The present invention relates to mixtures for preparing transparent plastics, encompassinga) a prepolymer prepared from compounds of the formula (I) and (II) where each R1, independently of the others, is hydrogen or a methyl radical, each R2, independently of the others, is a linear or branched, aliphatic or cycloaliphatic radical, or a substituted or unsubstituted aromatic or heteroaromatic radical, and each of m and n, independently of the other, is a whole number greater than or equal to 0, where m+n>0, and from compounds of the formula (III), or from alkyl dithiols or from polythiols, preferablyin-line-formulae description="In-line Formulae" end="lead"?HS—R3—SH (III)in-line-formulae description="In-line Formulae" end="tail"? where R3, identical with or different from R2, can be as defined for R2, andb) at least one monomer (A) capable of free-radical polymerization and having at least 2 methacrylate groups, andc) aromatic vinyl compounds, such as styrene, andd) if appropriate, a monomer capable of free-radical polymerization and having at least two terminal olefinic groups whose reactivity differs, and/orif appropriate, at least one monomer (B) from the group of the methacrylates, preferably 2-hydroxyetyl methacrylate.
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Hartmann Patrik
Schmitt Bardo
Jagannathan Vasu
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Reddy Karuna P
Roehm GmbH & Co. KG
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