The present invention relates to a process for producing polymers in powder form by using laser energy. It relates also to polymers in powder form obtainable according to that process, and the use of those polymers in powder form in additive manufacturing.

The present invention relates to a process for producing polymers in powder form by using laser energy. It relates also to polymers in powder form obtainable according to that process, and the use of those polymers in powder form in additive manufacturing.

A preparation method of a fluoropolymer processing aid. The preparation method comprises the following steps: simultaneously adding ε-caprolactone and a fluoropolymer elastomer into a reactor, and heating to completely dissolve the fluoropolymer elastomer; and then cooling, adding polyol, mixing thoroughly, and adding an organotin catalyst to carry out a polymerization reaction; and after the reaction is finished, carrying out cooling, pulverizing or spray granulation so as to obtain the fluoropolymer processing aid. The processing aid prepared by using the method can reduce the extrusion pressure of a polymer during extrusion, improve the processing efficiency, improve the phenomena of melt rupture and “sharkskin” during polymer extrusion, and effectively enhance the surface quality of a product. Compared with the prior art, the processing aid of the invention has the characteristics of uniform dispersed particle size during polymer processing, no coking at a die head during long-time polymer extrusion processing, etc.

A preparation method of a fluoropolymer processing aid. The preparation method comprises the following steps: simultaneously adding ε-caprolactone and a fluoropolymer elastomer into a reactor, and heating to completely dissolve the fluoropolymer elastomer; and then cooling, adding polyol, mixing thoroughly, and adding an organotin catalyst to carry out a polymerization reaction; and after the reaction is finished, carrying out cooling, pulverizing or spray granulation so as to obtain the fluoropolymer processing aid. The processing aid prepared by using the method can reduce the extrusion pressure of a polymer during extrusion, improve the processing efficiency, improve the phenomena of melt rupture and “sharkskin” during polymer extrusion, and effectively enhance the surface quality of a product. Compared with the prior art, the processing aid of the invention has the characteristics of uniform dispersed particle size during polymer processing, no coking at a die head during long-time polymer extrusion processing, etc.

The present invention generally relates to a powder comprising a PEEK-PEoEK copolymer, wherein the PEEK-PEoEK copolymer having R.sub.PEEK and R.sub.PEoEK repeat units in a molar ratio R.sub.PEEK/R.sub.PEoEK ranging from 95/5 to 5/95. The present invention also relates to a method of preparing the powder, as well as to the uses of the powder for coating, compression molding and to prepare a three-dimensional (3D) object.

The present invention generally relates to a powder comprising a PEEK-PEoEK copolymer, wherein the PEEK-PEoEK copolymer having R.sub.PEEK and R.sub.PEoEK repeat units in a molar ratio R.sub.PEEK/R.sub.PEoEK ranging from 95/5 to 5/95. The present invention also relates to a method of preparing the powder, as well as to the uses of the powder for coating, compression molding and to prepare a three-dimensional (3D) object.

The present invention relates to polypropylene particles and a method for preparing same, the polypropylene particles being formed from a polypropylene resin, and having a melting index (M.I.) of 1000 g/10 min or more when the particles are re-melted under a temperature condition of 150° C. to 250° C. and a condition of atmospheric pressure to a pressure of 15 MPa.

The present invention relates to polypropylene particles and a method for preparing same, the polypropylene particles being formed from a polypropylene resin, and having a melting index (M.I.) of 1000 g/10 min or more when the particles are re-melted under a temperature condition of 150° C. to 250° C. and a condition of atmospheric pressure to a pressure of 15 MPa.

Disclosed is a thermoplastic resin composition, a method of preparing the same, and a molded article manufactured using the same, including a thermoplastic resin composition including 100 parts by weight of a base resin including a vinyl cyanide compound-conjugated diene compound-aromatic vinyl compound graft copolymer (A); a vinyl cyanide compound-conjugated diene compound-aromatic vinyl compound copolymer (B); an acrylate-aromatic vinyl compound-vinyl cyanide compound graft copolymer (C); a vinyl cyanide compound-aromatic vinyl compound copolymer (D); and a branched vinyl cyanide compound-aromatic vinyl compound copolymer (E) and a high-density polyethylene resin (F), a method of preparing the thermoplastic resin composition, and a molded article manufactured using the thermoplastic resin composition.

Disclosed is a thermoplastic resin composition, a method of preparing the same, and a molded article manufactured using the same, including a thermoplastic resin composition including 100 parts by weight of a base resin including a vinyl cyanide compound-conjugated diene compound-aromatic vinyl compound graft copolymer (A); a vinyl cyanide compound-conjugated diene compound-aromatic vinyl compound copolymer (B); an acrylate-aromatic vinyl compound-vinyl cyanide compound graft copolymer (C); a vinyl cyanide compound-aromatic vinyl compound copolymer (D); and a branched vinyl cyanide compound-aromatic vinyl compound copolymer (E) and a high-density polyethylene resin (F), a method of preparing the thermoplastic resin composition, and a molded article manufactured using the thermoplastic resin composition.