The present invention relates to a process for the preparation of oligo(alkylene glycol)-functionalized polyisocyanopeptides comprising the steps of functionalizing an isocyanopeptide with oligo-(alkylene glycol) side chains and subsequently polymerizing the oligo-alkylene glycol-functionalized isocyanopeptides. Several isocyanopeptides may be functionalized with various linear or non-linear oligo-(alkylene glycol) side chains having variable chain length. The alkylene glycol may be selected from the group consisting of ethylene-, propylene-, butylene- or pentylene glycol. Preferably, the isocyanopeptides are functionalized with at least three ethylene glycol side chains. The peptides may comprise L-amino acids, D-amino acids or D, L-amino acids. The obtained oligoalkylene-functionalized polyisocyanopeptides are a new class of materials with unique thermo-responsive properties.

The present invention relates to a process for the preparation of oligo(alkylene glycol)-functionalized polyisocyanopeptides comprising the steps of functionalizing an isocyanopeptide with oligo-(alkylene glycol) side chains and subsequently polymerizing the oligo-alkylene glycol-functionalized isocyanopeptides. Several isocyanopeptides may be functionalized with various linear or non-linear oligo-(alkylene glycol) side chains having variable chain length. The alkylene glycol may be selected from the group consisting of ethylene-, propylene-, butylene- or pentylene glycol. Preferably, the isocyanopeptides are functionalized with at least three ethylene glycol side chains. The peptides may comprise L-amino acids, D-amino acids or D, L-amino acids. The obtained oligoalkylene-functionalized polyisocyanopeptides are a new class of materials with unique thermo-responsive properties.

Novel compositions for producing particles, powders or strands with coatings of discrete carbon nanotubes wherein the coatings have a selected a range of porosity and the discrete carbon nanotubes have selected surface modifications to improve wetting or flow of material through the pores of the carbon nanotube coating. The coatings have less than about 20% mass of bundles or ropes of carbon nanotubes larger than about 5 micrometers thereby improving performance of the printed parts. The compositions may include coatings of a thickness from about 5 nanometers to about 5000 nanometers on particles of diameter less than about 5000 micrometers or polymer strands wherein the coating includes discrete carbon nanotubes and/or surface modification of the discrete carbon nanotubes.

Novel compositions for producing particles, powders or strands with coatings of discrete carbon nanotubes wherein the coatings have a selected a range of porosity and the discrete carbon nanotubes have selected surface modifications to improve wetting or flow of material through the pores of the carbon nanotube coating. The coatings have less than about 20% mass of bundles or ropes of carbon nanotubes larger than about 5 micrometers thereby improving performance of the printed parts. The compositions may include coatings of a thickness from about 5 nanometers to about 5000 nanometers on particles of diameter less than about 5000 micrometers or polymer strands wherein the coating includes discrete carbon nanotubes and/or surface modification of the discrete carbon nanotubes.

The invention provides particulate material suitable for use in manufacturing a three-dimensional object, the material comprising a plurality of particles. Each particle has a thermoplastic polymeric core; and a polymeric shell that coats the polymeric core. The polymeric core makes up 75 wt % or more of each particle. The polymeric shell is formed from a co-polymer of a major monomer and a minor monomer, wherein the major monomer comprises a polymerisable group, and the minor monomer comprises (i) a polymerisable group; and (ii) a functional component, and wherein the co-polymer is formed by reaction of the polymerisable group on the major monomer with the polymerisable group on the minor monomer.

The invention provides particulate material suitable for use in manufacturing a three-dimensional object, the material comprising a plurality of particles. Each particle has a thermoplastic polymeric core; and a polymeric shell that coats the polymeric core. The polymeric core makes up 75 wt % or more of each particle. The polymeric shell is formed from a co-polymer of a major monomer and a minor monomer, wherein the major monomer comprises a polymerisable group, and the minor monomer comprises (i) a polymerisable group; and (ii) a functional component, and wherein the co-polymer is formed by reaction of the polymerisable group on the major monomer with the polymerisable group on the minor monomer.

A fusing agent for three-dimensional printing can include from about 5 wt % to about 40 wt % water; from about 4 wt % to about 60 wt % C7 to C12 aliphatic ester cosolvent; and from about 0.5 wt % to about 10 wt % solubilized avobenzone.

A fusing agent for three-dimensional printing can include from about 5 wt % to about 40 wt % water; from about 4 wt % to about 60 wt % C7 to C12 aliphatic ester cosolvent; and from about 0.5 wt % to about 10 wt % solubilized avobenzone.

Compositions for additive manufacturing applications are described herein which, in some embodiments, impart flame resistant and/or flame retardant properties to articles printed or formed from the compositions. The compositions may also impart desirable mechanical properties to the articles. In some embodiments, a composition comprises a sinterable powder or a thermoplastic polymer in an amount of 10-99 wt. %, based on the total weight of the composition, and an intumescent additive in an amount of up to 30 wt. %, based on the total weight of the composition. The intumescent additive comprises a phosphinate component and at least one of (a) a heptazine or melamine-derived component, and (b) a proton donor component.

Compositions for additive manufacturing applications are described herein which, in some embodiments, impart flame resistant and/or flame retardant properties to articles printed or formed from the compositions. The compositions may also impart desirable mechanical properties to the articles. In some embodiments, a composition comprises a sinterable powder or a thermoplastic polymer in an amount of 10-99 wt. %, based on the total weight of the composition, and an intumescent additive in an amount of up to 30 wt. %, based on the total weight of the composition. The intumescent additive comprises a phosphinate component and at least one of (a) a heptazine or melamine-derived component, and (b) a proton donor component.