A method produces polyamide fine particles by polymerizing a polyamide monomer (A) in the presence of a polymer (B) at a temperature equal to or higher than the crystallization temperature of a polyamide to be obtained, wherein the polyamide monomer (A) and the polymer (B) are homogeneously dissolved at the start of polymerization, and polyamide fine particles are precipitated after the polymerization. Polyamide fine particles have a number average particle size of 0.1 to 100 μm, a sphericity of 90 or more, a particle size distribution index of 3.0 or less, a linseed oil absorption of 100 mL/100 g or less, and a crystallization temperature of 150° C. or more.

Novel polyketanil-based compositions for use as a laser-releasable composition for temporary bonding and laser debonding processes are provided. The inventive compositions can be debonded using various UV lasers, at wavelengths from about 300 nm to about 360 nm, leaving behind little to no debris. The layers formed from these compositions possess good thermal stabilities and are resistant to common solvents used in semiconductor processing. The compositions can also be used as build-up layers for redistribution layer formation.

Aspects of the invention include a polymer comprising: a plurality of repeating units, each repeating unit comprising a polymer backbone group directly or indirectly covalently linked to one or two side chain moieties; wherein: each polymer backbone group is independently a ROMP-polymerized monomer; each one of the one or two side chain moieties independently comprises a peptide moiety or a non-peptide therapeutic moiety; wherein the polymer comprises a plurality of peptide moieties; each polymer backbone group is covalently attached to at least one other polymer backbone group; 100% of the ROMP-polymerized monomers are each individually attached to the one or two side chain moieties; and at least one side chain moiety of the polymer comprises a non-peptide therapeutic moiety, one polymer-terminating group comprises a non-peptide therapeutic moiety, and/or each of both polymer-terminating groups comprises a non-peptide therapeutic moiety.

Aspects of the invention include a polymer comprising: a plurality of repeating units, each repeating unit comprising a polymer backbone group directly or indirectly covalently linked to one or two side chain moieties; wherein: each polymer backbone group is independently a ROMP-polymerized monomer; each one of the one or two side chain moieties independently comprises a peptide moiety or a non-peptide therapeutic moiety; wherein the polymer comprises a plurality of peptide moieties; each polymer backbone group is covalently attached to at least one other polymer backbone group; 100% of the ROMP-polymerized monomers are each individually attached to the one or two side chain moieties; and at least one side chain moiety of the polymer comprises a non-peptide therapeutic moiety, one polymer-terminating group comprises a non-peptide therapeutic moiety, and/or each of both polymer-terminating groups comprises a non-peptide therapeutic moiety.

The present invention relates to bone repair material of multivariant amino acid polymer-hydroxyapatite, supportive implants and preparation method. Said restorative material is made of multivariant amino acid polymers consisted with ε-aminocaproic acid and other α-amino acids, together with constituents modified hydroxyapatite, in which the constituent modified hydroxyapatite uses calcium salt as modified constituents that can be accepted in medicine and has a more solubility compared with hydroxyapatite. Modified hydroxyapatite is constructed from said calcium salt and hydroxyapatite, with a mass ratio of (2-20):(98-80), and the content of modified hydroxyapatite is 10-70% based on the mass of said bone repair material; the content of ε-aminocaproic acid in multivariant amino acid polymers is 60-99% based on the total molar quantity of multivariant amino acid polymers.

The present invention relates to bone repair material of multivariant amino acid polymer-hydroxyapatite, supportive implants and preparation method. Said restorative material is made of multivariant amino acid polymers consisted with ε-aminocaproic acid and other α-amino acids, together with constituents modified hydroxyapatite, in which the constituent modified hydroxyapatite uses calcium salt as modified constituents that can be accepted in medicine and has a more solubility compared with hydroxyapatite. Modified hydroxyapatite is constructed from said calcium salt and hydroxyapatite, with a mass ratio of (2-20):(98-80), and the content of modified hydroxyapatite is 10-70% based on the mass of said bone repair material; the content of ε-aminocaproic acid in multivariant amino acid polymers is 60-99% based on the total molar quantity of multivariant amino acid polymers.

A polymer powder having a surface energy of less than 35 mN/m is suitable for melting/sintering powder particles for layer-by-layer production of three-dimensional objects.

A polymer powder having a surface energy of less than 35 mN/m is suitable for melting/sintering powder particles for layer-by-layer production of three-dimensional objects.

The present invention relates to an amphiphilic polymer which includes a large amount of hydrophilic structures and hydrophobic structures, and thereby effectively stabilizing a membrane protein having a hydrophobic surface in an aqueous solution. A method of preparing an amphiphilic polymer represented by Formula 1 includes reacting a poly-gamma-glutamic acid with a reaction product of a fluorescent dye, biotin, an alkyl carboxylic acid having 1 to 10 carbon atoms or a cycloalkyl carboxylic acid having 5 to 20 carbon atoms having a carboxyl group, and dicyclo-hexylcarbodiimide (DCC) and reacting the poly-gamma-glutamic acid with DCC after reacting the poly-gamma-glutamic acid with the reaction product, and reacting the poly-gamma-glutamic acid with a hydrophilic amine and a hydrophobic amine.

The present invention relates to an amphiphilic polymer which includes a large amount of hydrophilic structures and hydrophobic structures, and thereby effectively stabilizing a membrane protein having a hydrophobic surface in an aqueous solution. A method of preparing an amphiphilic polymer represented by Formula 1 includes reacting a poly-gamma-glutamic acid with a reaction product of a fluorescent dye, biotin, an alkyl carboxylic acid having 1 to 10 carbon atoms or a cycloalkyl carboxylic acid having 5 to 20 carbon atoms having a carboxyl group, and dicyclo-hexylcarbodiimide (DCC) and reacting the poly-gamma-glutamic acid with DCC after reacting the poly-gamma-glutamic acid with the reaction product, and reacting the poly-gamma-glutamic acid with a hydrophilic amine and a hydrophobic amine.