A sulfonated aliphatic or aromatic compound for the production of a modified polyamide that can significantly increase the glass transition temperature of the polyamide is described. A polyamide composition including at least: one polyamide modified by a sulfonated compound, the compound being chemically bonded to the polymer chain of the polyamide; and reinforcing or filling agents is also described. The composition can be a composition to be molded, for example, in the form of granules or powder, to be used in the production of articles using an injection molding method.

A sulfonated aliphatic or aromatic compound for the production of a modified polyamide that can significantly increase the glass transition temperature of the polyamide is described. A polyamide composition including at least: one polyamide modified by a sulfonated compound, the compound being chemically bonded to the polymer chain of the polyamide; and reinforcing or filling agents is also described. The composition can be a composition to be molded, for example, in the form of granules or powder, to be used in the production of articles using an injection molding method.

The invention relates to a polymer or oligomer comprising a) An oligomeric or polymeric core comprising carbon atoms and at least one of oxygen atoms and nitrogen atoms, and b) at least three hydrocarbyl terminal and/or pending groups having 12 to 100 carbon atoms, wherein the hydrocarbyl groups are linked to the core via c) a linking moiety comprising i) a urethane group and ii) a group selected from urethane group, urea group, and biuret group.

The invention relates to a polymer or oligomer comprising a) An oligomeric or polymeric core comprising carbon atoms and at least one of oxygen atoms and nitrogen atoms, and b) at least three hydrocarbyl terminal and/or pending groups having 12 to 100 carbon atoms, wherein the hydrocarbyl groups are linked to the core via c) a linking moiety comprising i) a urethane group and ii) a group selected from urethane group, urea group, and biuret group.

The invention relates to urea- and/or urethane-substituted amides of the general formula (I) ##STR00001##
The radicals R1, Z1, R2, and Z2 comprise a building block containing urea groups and/or containing urethane groups; the radicals R4, Z4, R5, and Z5 comprise a building block containing amide groups, and E is a carboxylic acid group or salt thereof. The invention also relates to rheology control agents which consist of or comprise the amides of the formula (I). A further subject of the invention is a method for producing the rheology control agents, and the use of the urea- and/or urethane-substituted amides, and also of the rheology control agents, as thickeners, especially in liquid compositions, and also the liquid compositions themselves.

The invention relates to urea- and/or urethane-substituted amides of the general formula (I) ##STR00001##
The radicals R1, Z1, R2, and Z2 comprise a building block containing urea groups and/or containing urethane groups; the radicals R4, Z4, R5, and Z5 comprise a building block containing amide groups, and E is a carboxylic acid group or salt thereof. The invention also relates to rheology control agents which consist of or comprise the amides of the formula (I). A further subject of the invention is a method for producing the rheology control agents, and the use of the urea- and/or urethane-substituted amides, and also of the rheology control agents, as thickeners, especially in liquid compositions, and also the liquid compositions themselves.

The present invention provides a powder of spherical particles of crosslinkable polyamide suitable for the technique of selective laser sintering (SLS), and also a process for the production of such a powder of spherical particles of crosslinkable polyamide. The present invention also provides the production of articles by SLS, followed by a crosslinking step, starting from said powder of spherical particles of crosslinkable polyamide.

A compound of the formula: (I) wherein: R.sup.1 is selected from H, an alkyl group, an aryl group, and combinations thereof; R.sup.2 is R.sup.f—Y—(CH.sub.2)X—; R.sup.3 is a reactive group; R.sup.f is a perfluorinated alkyl group; Y is selected from a bond, S(O).sub.2—N(CH.sub.3)—, —S(O).sub.2—N(CH.sub.2CH.sub.3)—, —S(O).sub.2—O— —S(O).sub.2— —C(O)—, —C(O)—S— —C(O)—O— —C(O)—NH—, —C(O)—N(CH.sub.3)—, —C(O)—N(CH.sub.2CH.sub.3)—, —(CH.sub.2CH.sub.2O)y-, —O—, and —O—C(O)—CH═CH—C(O)—O—; n is greater than 10; x is 2 to 20; and y is at least 1. ##STR00001##

A compound of the formula: (I) wherein: R.sup.1 is selected from H, an alkyl group, an aryl group, and combinations thereof; R.sup.2 is R.sup.f—Y—(CH.sub.2)X—; R.sup.3 is a reactive group; R.sup.f is a perfluorinated alkyl group; Y is selected from a bond, S(O).sub.2—N(CH.sub.3)—, —S(O).sub.2—N(CH.sub.2CH.sub.3)—, —S(O).sub.2—O— —S(O).sub.2— —C(O)—, —C(O)—S— —C(O)—O— —C(O)—NH—, —C(O)—N(CH.sub.3)—, —C(O)—N(CH.sub.2CH.sub.3)—, —(CH.sub.2CH.sub.2O)y-, —O—, and —O—C(O)—CH═CH—C(O)—O—; n is greater than 10; x is 2 to 20; and y is at least 1. ##STR00001##

Methods for preparation of novel amphiphilic derivatives of thioether containing block copolypeptides with narrow chain length distributions are described. These block copolymers can be chemically modified by oxidation and alkylation of the thioether containing residues. These materials generate self-assembled micelles, vesicles and hydrogels, or emulsions with oil phases. These assemblies can be used to encapsulate and delivery therapeutic molecules. The assemblies can be taken up by cells to release molecules from the assemblies.