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US 2017/0362401 A1Published application
Fibre-matrix semifinished product
AssigneeLANXESS Deutschland GmbH
InventorsSTEFAN SEIDEL, MATTHIAS BIENMULLER, JOCHEN ENDTNER
Life of this patent
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Abstract
A flame-retardant single-, or multi-layered, fibre-matrix semi-finished product has a polyamide-based fibre-matrix that includes at least one organic phosphinic acid salt and/or a diphosphinic acid salt. A process for the production thereof includes impregnating a fibre ply, or plies, and consolidating the ply or plies into a composite.
Claims20
A fibre-matrix semi-finished product comprising:
- one or more semi-finished fibre product plies made of endless fibres, wherein:
- the endless fibers are in the form of wovens, non-crimp fabrics, multiaxial non-crimp fabrics, stitched fabrics, braids, batts, felts, mats and unidirectional fibre strands or mixtures of these materials;
- and
- the semi-finished fibre product plies each have a basis weight of 5 g/m2 to 3000 g/m2;
- and
- a compound impregnating the entirety of all the semi-finished fibre product plies, the compound comprising:
- component A)—at least one polyamide having a relative solution viscosity of 2.0 to 4.0 in m-cresol according to DIN EN ISO 307 at 25° C., as the matrix polymer, and
- component B)—based on 100 parts by weight of component A), 5 to 100 parts by weight of at least one organic phosphinic acid salt of formula (I) and/or a diphosphinic acid salt of formula (II), and/or polymers thereof,
- wherein
- R1 and R2 are identical or different and represent a linear or branched C1-C6-alkyl, and/or C6-C10-aryl,
- R3 represents linear or branched C1-C10-alkylene, C6-C10-arylene or C1-C6-alkylarylene or aryl-C1-C6-alkylene,
- M represents aluminium, zinc or titanium and/or a protonated nitrogen base,
- m is an integer from 1 to 4,
- n is an integer from 1 to 3,
- x is 1 or 2, and
- n, x and m in formula (II) simultaneously adopt only integers such that the diphosphinic acid salt of formula (II) as a whole is uncharged, and
- the fibre-matrix semi-finished product has a volume fraction of fibre materials of 25% to 65%, defined according to DIN 1310, and a volume fraction of air or gas of less than 15%.
14 more elements
A process for producing a single-layered fibre-matrix semi-finished product, the process comprising:
- applying a polymer compound to one or more semi-finished fibre product plies made of endless fibres, wherein:
- each of the semi-finished fibre product plies has a basis weight of 5 g/m2 to 3000 g/m2;
- and
- the semi-finished fibre product plies comprise the endless fibres in the form of wovens, non-crimp fabrics, multiaxial non-crimp fabrics, stitched fabrics, braids, batts, felts, mats and unidirectional fibre strands or mixtures of these materials;
- and
- the polymer compound comprises:
- component A)—at least one polyamide having a relative solution viscosity of 2.0 to 4.0 in m-cresol according to DIN EN ISO 307 at 25° C., and
- component B)—based on 100 parts by weight of component A), 5 to 100 parts by weight of at least one organic phosphinic acid salt of formula (I) and/or a diphosphinic acid salt of formula (II) and/or polymers thereof,
- wherein
- R1 and R2 are identical or different and represent a linear or branched C1-C6-alkyl, and/or C6-C10-aryl;
- R3 represents linear or branched C1-C10-alkylene, C6-C10-arylene or C1-C6-alkylarylene or aryl-C1-C6-alkylene;
- M represents aluminium, zinc or titanium and/or a protonated nitrogen base;
- m is an integer from 1 to 4;
- n is an integer from 1 to 3;
- x is 1 or 2, and
- n, x and m in formula (II) simultaneously adopt only integers such that the diphosphinic acid salt of formula (II) as a whole is uncharged;
- heating the semi-finished fibre product plies with the polymer compound to a temperature greater than or equal to the melting temperature of the at least one polyamide in the compound, and applying pressure to the plies to impregnate the polymer compound into the plies and consolidate the entirety of all of the semi-finished fibre product plies to provide a composite having a volume fraction of fibre materials of 25% to 65% defined according to DIN 1310, and a volume fraction of air or gas of less than 15%;
- and
- cooling and solidifying the polymer compound to obtain a fibre-matrix semi-finished product.
16 more elements
Dependencies are inferred from the claim text.