US 10,501,869 B2Granted

Filaments based on a coated core material

AssigneeBASF SE

InventorsPaul Van Der Schaaf, Bruno Inderbitzin, Marie-Claire Hermant, Martina Schömer

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Abstract

A filament containing a core material (CM) coated with a layer of shell material (SM), wherein the (CM) contains the components a) to c): a) 30 to 80% by volume, based on the total volume of the C) of at least one inorganic powder (IP), b) 20 to 70% by volume, based on the total volume of the CM of at least one binder (B) comprising component b1) b1) at least one polymer (P) and c) optionally at least one additive, wherein the at least one polymer (P) is a polyoxymethylene (POM) homopolymer, a POM copolymer or POM terpolymer and wherein at least some of the OH-end groups of the PO) homopolymer are capped, and the SM contains the components d) to f): d) 75 to 100% by volume, based on the total volume of the SM of at least one thermoplastic polymer, e) optionally at least one inorganic powder (IP), and f) optionally at least one additive, wherein the thickness of the layer of shell material is 0.05 to 0.5 mm.

Claims20

Dependent claims

A filament comprising a core material (CM) coated with a layer of shell material (SM), wherein

the core material (CM) comprises the components a) to c):
a) 30 to 80% by volume, based on the total volume of the core material (CM) of at least one inorganic powder (IP),
b) 20 to 70% by volume, based on the total volume of the core material (CM) of at least one binder (B) comprising component b1),
b1) at least one polymer (P) and
c) 0 to 20% by volume, based on the total volume of the core material (CM) of at least one additive (A),
wherein the at least one polymer (P) is a polyoxymethylene (POM) homopolymer, a polyoxymethylene (POM) copolymer or polyoxymethylene (POM) terpolymer and wherein at least some of the OH-end groups of the polyoxymethylene (POM) homopolymer are capped,
and the shell material (SM) comprises the components d) to f):
d) 75 to 100% by volume, based on the total volume of the shell material (SM) of at least one thermoplastic polymer (TP)
e) 0 to 20% by volume, based on the total volume of the shell material (SM) of the at least one inorganic powder (IP), and
f) 0 to 25% by volume, based on the total weight of the shell material (SM) of the at least one additive (A), wherein the thickness of the layer of shell material is 0.05 to 0.5 mm.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/744,428Filed 7 Jul 2016
Priority: EP 1517668614 Jul 2015
Published: US 2018/0202076 A119 Jul 2018
Granted: 10 Dec 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification45 codes

D01F 1/10
Addition of substances to the spinning solution or to the melt: other agents for modifying properties
B29C 48/0021
Combinations of extrusion moulding with other shaping operations: combined with joining, lining or laminating
B29C 48/05
Characterised by the shape of the extruded material at extrusion: filamentary, e.g. strands
B29C 64/118
Using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material: using filamentary material being melted, e.g.…