A decrease in molecular weight in molding of a polyamide is suppressed. A polyamide resin composition of the present invention includes: a polyamide having a structural unit containing an alkylene group having 1 to 3 carbon atoms and an amide bond; and a compound having a cyclic structure in which first nitrogen and second nitrogen of a carbodiimide group are bonded by a bonding group. A molded polyamide resin article is produced by molding of the polyamide resin composition through heat pressurization.

Provided herein are polymer compositions and extended release otic agents. In one aspect, provided herein is a polymer composition including about 5% to about 15% by weight of the polymer composition of a functional polymer, wherein the functional polymer includes a first functional group, about 0.05% to about 0.6% by weight of the polymer composition of a crosslinker, wherein the crosslinker includes a second functional group, and water, wherein a crosslinking reaction can occur between the first functional group and the second functional group to form a gel, and wherein the polymer composition has a gelation time of about 45 seconds to about 60 minutes at a temperature of about 20° C.

Provided herein are polymer compositions and extended release otic agents. In one aspect, provided herein is a polymer composition including about 5% to about 15% by weight of the polymer composition of a functional polymer, wherein the functional polymer includes a first functional group, about 0.05% to about 0.6% by weight of the polymer composition of a crosslinker, wherein the crosslinker includes a second functional group, and water, wherein a crosslinking reaction can occur between the first functional group and the second functional group to form a gel, and wherein the polymer composition has a gelation time of about 45 seconds to about 60 minutes at a temperature of about 20° C.

The present invention relates to the controllable degradation, filling-type complex bone implant of multivariant amino acid polymer-organic calcium/phosphorus salts, as well as to the preparative method thereof. The complex bone implant is consisted of multivariant amino acid polymers and medically acceptable organic calcium/phosphorus salts, while the content of organic calcium/phosphorus salts is 20-90% based on the total mass of composite material; the multivariant amino acid polymer is polymerized by ε-aminocaproic acid and at least two other amino acids, in which the molar content of ε-aminocaproic acid is at least 50% of the total molar quantity of amino acid polymers, while the amounts of other amino acids are at least 0.5% of the total molar quantity of amino acid polymers.

The present invention relates to the controllable degradation, filling-type complex bone implant of multivariant amino acid polymer-organic calcium/phosphorus salts, as well as to the preparative method thereof. The complex bone implant is consisted of multivariant amino acid polymers and medically acceptable organic calcium/phosphorus salts, while the content of organic calcium/phosphorus salts is 20-90% based on the total mass of composite material; the multivariant amino acid polymer is polymerized by ε-aminocaproic acid and at least two other amino acids, in which the molar content of ε-aminocaproic acid is at least 50% of the total molar quantity of amino acid polymers, while the amounts of other amino acids are at least 0.5% of the total molar quantity of amino acid polymers.

A degradable iron-based alloy stem comprises an iron-based alloy substrate and a degradable polymer in contact with the surface of the substrate. The weight-average molecular weight of the degradable polymer is in the range of [1, 100]*10.sup.4, and the polydispersity index of the degradable polymer is in the range of (1.0. 50]. The degradable polymer is selected from a degradable polyamino acid that can generate an acidic amino acid after degradation; or a mixture of the degradable polyamino acid and a degradable polyester, or a copolymer of monomers of the two; or a mixture of the degradable polyamino acid and a degradable polymer that does not generate acidic products after degradation, or a copolymer of the monomers of the two; or a mixture of the degradable polyamino acid, the degradable polyester and the degradable polymer that does not generate acidic products after degradation, or a copolymer of monomers of the three, or a mixture of a copolymer of monomers of any two of the three with the remaining one.

A degradable iron-based alloy stem comprises an iron-based alloy substrate and a degradable polymer in contact with the surface of the substrate. The weight-average molecular weight of the degradable polymer is in the range of [1, 100]*10.sup.4, and the polydispersity index of the degradable polymer is in the range of (1.0. 50]. The degradable polymer is selected from a degradable polyamino acid that can generate an acidic amino acid after degradation; or a mixture of the degradable polyamino acid and a degradable polyester, or a copolymer of monomers of the two; or a mixture of the degradable polyamino acid and a degradable polymer that does not generate acidic products after degradation, or a copolymer of the monomers of the two; or a mixture of the degradable polyamino acid, the degradable polyester and the degradable polymer that does not generate acidic products after degradation, or a copolymer of monomers of the three, or a mixture of a copolymer of monomers of any two of the three with the remaining one.

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.

Described herein is a new process for the preparation of polyamide microcapsules. Polyamide microcapsules obtainable by the process are also described. Perfuming compositions and consumer products including capsules, in particular perfumed consumer products in the form of home care or personal care products, are also described.