Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Reexamination Certificate
2006-03-07
2006-03-07
Boykin, Terressa (Department: 1711)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
C264S176100, C264S219000, C428S364000, C525S088000, C525S089000, C525S090000, C525S397000, C525S398000, C525S271000
Reexamination Certificate
active
07009027
ABSTRACT:
This invention relates to a method for producing and processing polyester block copolymers, in particular, polyester side-chain grafted, rigid side-chain and/or semi-rigid side-chain polymers. According to the invention, the monomeric units of rigid side-chain and/or semi-rigid side-chain polymers are, preferably in the melt, polycondensated together with monofunctionalized and/or difunctionalized, cyclic dicarboxylic acid anhydrides to form polymers having anhydride terminal and/or side groups. The formed polyester anhydrides are reacted with the hydroxyl groups and/or with the ester groups of meltable linear polyesters in order to form side-chain grafted, rigid side-chain and/or semi-rigid side-chained polymers and, together with meltable polyesters, they form molecularly reinforced blends. These blends can be shaped into filaments or fibers having a high orientation of the reinforcing polymer or they serve as compatibility mediators in blends consisting of a polyester matrix and of rigid side-chain and/or semi-rigid side-chain polymers. The filaments are used, in particular, in technical fields or in the carpet industry.
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Heinemann Klaus
Meusel Erich
Mueller Wolfgang
Taeger Eberhard
Boykin Terressa
ProPat L.L.C.
Thueringisches Institut fuer Textil-und Kunststoff-Forschung e.V
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