Flame-proof, glass fibre-reinforced polyamide moulding materials
AssigneeBayer Aktiengesellschaft
InventorsHeinz Bonten, Werner Nielinger, Dietrich Michael, Harald Selbeck, Rolf-Volker Meyer
Life of this patent
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Abstract
Polyamide moulding materials which have been reinforced with unsized glass fibres and to which a flame-proof finish has been imparted by means of melamine or melamine cyanurate and which have a high glow wire resistance.
Claims8
A reinforced polyamide moulding material with flame-retardant properties comprising polyamide 6 or polyamide 66 containing 3 to 25% by weight of melamine, melamine cyanurate or a mixture thereof and 5 to 45% by weight of unsized glass fibres.
A reinforced polyamide material comprising 55 parts by weight of polyamide 66 having a relative viscosity of 3.0, measured on a 1% strength solution in m-cresol at 25.degree. C. in an Ubbelohde viscometer, 30 parts by weight of short glass fibres and 15 parts by weight of melamine, where the short glass fibres are ground, unsized fibres, having a fibre diameter of approximately 10 .mu.m.
A reinforced polyamide material comprising 62.5 parts by weight of polyamide 66, 30 parts by weight of unsized glass fibres and 7.5 parts by weight of melamine cyanurate.
A reinforced polyamide material comprising 65 parts by weight of polyamide 66 having a relative viscosity of 3.0, measured on a 1% strength solution in m-cresol at 25.degree. C. in an Ubbelohde viscometer, 20 parts by weight of short glass fibres and 15 parts by weight of melamine, where the short glass fibres are ground, unsized fibres having a fibre diameter of approximately 14 .mu.m.
A reinforced polyamide material comprising 62.5 parts by weight of polyamide 6 having a relative viscosity of 2.9, measured on a 1% strength solution in m-cresol at 25.degree. C. in an Ubbelohde viscometer, 30 parts by weight of unsized, ground glass fibres having a fibre diameter of 10 .mu.m and 7.5 parts by weight of melamine cyanurate.
Dependencies are inferred from the claim text.