B - Operations – Transporting – 32 – B
Patent
B - Operations, Transporting
32
B
B32B 25/08 (2006.01) C08J 5/12 (2006.01) C08J 7/04 (2006.01) C08L 53/02 (2006.01) C08L 59/02 (2006.01) B29C 45/16 (2006.01) C08L 23/02 (2006.01)
Patent
CA 2434361
The invention relates to a compound for the production of a composite body, comprising: a hard component (a) of a polyacetal, namely polyoxymethylene (POM) and a soft component (b) of one or more thermoplastic styrene elastomers (TPE), namely hydrogenated styrene block copolymer(s), which is moulded directly on to component (a). In the prior art the inadequate adhesion for some intended uses has manifested itself as a disadvantage of such a choice of materials for the components. The invention provides a remedy for this in that the styrene block copolymer(s) are poly-isoprene/butadiene polymer(s) (SEEPS) and/or poly-isoprene polymer(s) (SEPS) and/or poly-butadiene polymer(s) (SEBS), and in that the styrene block copolymer(s) are adhesion-modified, wherein styrene/butadiene copolymer (SBS) and/or ethylene/vinyl acetate copolymer (EVA) and/or olefinic materials, such as PE, PP, polystyrene (PS) are added as modifiers of th styrene block copolymer(s). One or more of the following substances are additionally added as modifiers of the polyoxymethylene: styrene/butadiene copolymer (SBS); ethylene/vinyl acetate copolymer (EVA); hydrogenated styrene block copolymer based on a hydrogenated poly-isoprene/butadiene rubber (SEEPS); hydrogenated styrene block copolymer based on a hydrogenated poly-isoprene rubber (SEPS); hydrogenated styrene block copolymer based on a hydrogenated poly-butadiene rubber (SEBS); compound based on a hydrogenated styrene block copolymer which can be present as hydrogenated poly-isoprene/butadiene rubber or as hydrogenated poly-isoprene rubber (SEPS) or as hydrogenated poly-butadiene rubber (SEBS); olefinic substances, such as PE, PP; polystyrene (PS), ABS, PC, SAN, TPE-U. The composite body according to the invention has excellent adhesion and sealing properties and can therefore be employed for a large number of intended uses in motor vehicle construction etc.
L'invention a trait à un composé destiné à la production d'un corps composite, contenant un composant dur d'un polyacétal, à savoir du polyoxyméthylène (POM), et un composant mou d'un/d'élastomère(s) styrène thermoplastique(s), à savoir un/des copolymère(s) bloc(s) styrène hydrogéné(s) (polymère polyisopropène/butadiène (SEEPS), polymère polyisopropène (SEPS), polymère polybutadiène (SEBS)), qui est/sont modifié(s) par adhérence par un copolymère styrène/butadiène (SBS), un E/VAC, des matériaux oléfiniques tels que du PE ou du PP, et/ou du polystyrène. Le polyoxyméthylène est également modifié par un copolymère styrène/butadiène (SBS), un E/VAC, un copolymère bloc styrène hydrogéné basé sur un SEEPS hydrogéné, un SEPS hydrogéné ou un SEBS hydrogéné, un composé basé sur un copolymère bloc styrène hydrogéné qui peut être présenté comme un SEEPS hydrogéné, un SEPS hydrogéné ou un SEBS hydrogéné, des substances oléfiniques telles que du PE ou du PP, du polystyrène, de l'ABS, du PC, du SAN et/ou du TPE-U. Ce corps composite présente d'excellentes propriétés d'adhérence et d'étanchéité, et peut par conséquent être adapté à un grand nombre d'utilisations souhaitées dans la construction de moteurs, etc.
Eickhoff Norbert
Greulich Stefan
Kirberg Karl-Wilhelm
Stelzer Olaf
Bennett Jones Llp
E. I. Du Pont de Nemours And Company
Pongs & Zahn Plastics Ag
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