Stamicarbon B.v.

Stamicarbon B.v., Licensing Subsidiary of Dsm

Eize Roerdink

Jean M Warnier

Antonius J Bongers

Wilhelmus G Bruls

The invention relates to a polyamide composition comprising tetramethylene adipamide, tetramethylene-terephthalamide and tetramethylene isophthalamide units. the polyamide composition has a melting temperature in the same order as the homopolymer tetramethylene adipamide, a comparable crystallinity but very improved melt stability and stiffness.

Terpolyamide from tetramethylene diamine

The invention relates to a copolyamide for application in films with improved barrier properties. The copolyamide containing tetramethyleneadipamide and tetramethylene-isophtalamide in a ratio between 9:1 and 1:9 and a relative viscosity of at least 2.0, and a process for the production of the copolyamide. Preferably the copolyamide contains a small amount of a compound that induces the formation of networks between the polyamide chains.

4.6/4.I copolyamide and a process for the preparation thereof

The invention relates to a method for the production of high-molecular polytetramethylene adipamide in a two-step process in which the prepolymer particles obtained in the first process step are compressed into pellets which are subjected to the after-condensation reaction. The obtained high-molecular polytetramethylene adipamide pellets can be used without further shaping through e.g. melt extrusion.

Production of high-molecular polytetramethylene adipamide pellet

A reproducible method for the preparation of high molecular weight white poly(tetramethyleneadipamide) nylon 4,6 using moderate temperatures and relatively short reaction times is disclosed. In the method, the prepolymerization step is limited under controlled reaction conditions so that a prepolymer is formed with a very low degree of polymerization, whereby a shorter, commercially viable, after-condensation time is achieved to obtain a high molecular weight final poly-condensation polymer product.

Process for the preparation of nylon 4,6

The invention relates to a thermoplastic moulding compound consisting of:

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Beek, Netherlands

Eize Roerdink