Dsm IP Assets B.v.

Martinus L M Bos

Edwin A A Van Hartingsveldt

Marnix Van Gurp

William A C Roovers

Henrica N A M Menting

Pieter A Van Der Spek

The invention relates to a thermoplastic composition comprising (a) an aromatic polycarbonate and/or a polyester, and (b) an effective amount of a mould release agent containing (b1) a fatty acid ester of an aliphatic polyol having 2-6 hydroxy groups and an aliphatic C-Ccarboxylic acid; and (b2) a saturated alpha-olefin oligomer of at least one C-Calpha-olefin; the mass ratio of components (b1) and (b2) being from 1/9 to 9/1. With this thermoplastic composition a very regular injection moulding processing is possible, with lower release forces needed during demoulding of parts, and with shorter total moulding cycle-times. The invention further concerns the use of the thermoplastic composition according to the invention for injection moulding of articles and to moulded articles thus obtained.

Thermoplastic composition comprising an aromatic polycarbonate and/or a polyester with improved mould release behaviour

The invention relates to a polycarbonate composition containing: a) 40&#x2013;69.5 mass % of aromatic polycarbonate having a limiting viscosity number of 43&#x2013;52 ml/g, b) 30&#x2013;50 mass % of sized glass fibres, c) 0.5&#x2013;5 mass % of at least one partially hydrogenated block copolymer containing at least two terminal polymer blocks A of a monoalkenylarene and at least one intermediate polymer block B of a conjugated diene, and optionally d) 0&#x2013;25 mass % of other additives, and where the sum of a&#x2013;d) is 100%. The composition combines improved toughness, for example increased elongation at break and improved environmental stress cracking resistance, and high strength and rigidity. The invention also relates to a process for producing the polycarbonate composition according to the invention, to a moulded part that contains this composition and to an article that contains such a moulded part.

Glass fibre reinforced polycarbonate composition met improved toughness

A halogen-free, flame-retardant composition includes (1) organic phosphorus compound (A) and (1&prime;) melamine or a compound derived from melamine (B); or (2) a melamine-phosphorus compound (AB). The composition also includes and olefin polymer and from 0.1-30 wt % based on the olefin polymer, of a compound containing acid, acid anhydride or epoxy groups. The flame-retardant composition may included in a polycondensate composition which incorporate the flame-retardant composition is substantially shortened.

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Born, Netherlands

Martinus L M Bos