Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1995-03-15
1999-01-12
Sergent, Rabon
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525432, 528310, 528323, 528335, 528342, 528481, 528503, C08G 6948, C08G 6946, C08G 6904, C08G 6908
Patent
active
058591486
ABSTRACT:
The invention relates to a process for the preparation of star-branched polymers by reaction in the melt of a polymer having at least one hetero atom in the chain with a compound having at least three functional groups. Suitable polymers are for instance polyamides, polyesters, polyurethanes, polyoxyalkyls, polyimines and copolymers of these. Functional groups are for instance amine, carboxyl, hydroxyl, isocyanate and imine groups. The process is very fast and requires no special purification. The process enables star-branched polymers to be prepared which are derived from so-called AABB polycondensates.
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Beusen Guido P. C.
Borggreve Reinoldus J. M.
De Brabander-Van De Berg Ellen M. M.
DSM N.V.
Sergent Rabon
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