Abstract:
The invention relates to an anionic polyamide functionalized by at least one tryptophan unit, -Trp, said tryptophan unit being bonded to the polyamide by an amide function separated from the backbone by a linker arm L, the polyamide being a chain selected from the group consisting of the following polymers: Formulas (I), (II), (III), L being selected from the group consisting of a simple link, a -CH2- group, or a -CH2CH2- group, -Trp being a tryptophan residue, L and/or D, produced by the coupling of the amino of the tryptophan or a tryptophan derivative, selected from the group consisting of tryptophanol, tryptophanamide, and the alkaline cation salts thereof, and an acid carried by the polyamide. The present invention also relates to a pharmaceutical composition containing one of the polyamides according to the invention.
Abstract:
The present invention provides an anionic dendrimer polymer of at least two generations. The present invention also provides for the production of these polymers and to their use in the inhibition of angiogenesis.
Abstract:
Methods for forming maleimide functionalized polymers are provided. In one such embodiment, a maleimide functionalized polymer is prepared in a method that includes a step of carrying out a reverse Diels-Alder reaction. Intermediates useful in the methods, as well as methods for preparing the intermediates, are also provided. Also provided are polymeric reagents, methods of using polymeric reagents, compounds and conjugates.
Abstract:
Chemiluminescent substrate delivery systems comprising a conjugate a dendrimer and at least one chemiluminescent substrate are provided. The substrate delivery system can also include a chemiluminescence enhancer. The dendrimer/chemiluminescent substrate conjugates can be used in kits including an enzyme capable of activating the chemiluminescent substrate to produce a peroxygenated intermediate that decomposes to produce light. The dendrimer/chemiluminescent substrate conjugates can be used in assays to detect the presence of an analyte (e.g., an enzyme, an antibody, an antigen or a nucleic acid) in a sample. Figure (1A) shows a polyamidoamine (PAMAM) dendrimer with NH2 surface groups.
Abstract:
A compound having the formula: R1OOC-(CH2)n-CH(CH2CH2SO3X)-(CH2)m-COOR2 where n is an integer from 1 to 10, m is an integer from 1 to 10, X is an alkali metal selected from the group consisting of lithium, sodium and potassium, and R1 and R2 are independently selected from hydrogen and alkyl groups having one to four carbon atoms is disclosed, and use thereof as a cationic dyeability modifier, e.g., for incorporation into polyesters and polyamides to increase their affinity for basic dyes.
Abstract:
The invention comprises an improved recycling and recovery process for rugs, flooring, carpeting, carpeting materials, and other textiles particular from waste carpet containing at least some synthetic fiber backing materials, and at least some nylon as well, and more particularly for the separation and recovery of the nylon polymers in purified and reusable condition and also recovery of other polymeric fibers and materials which may be present and can be recycled and reused.
Abstract:
Aqueous monomer and oligomer extracts, which during the production of polyamides are obtained in the course of extraction of the polymerisate with water, are used for producing polyamides by direct reaction with aminonitriles.
Abstract:
A process for producing a polyamide by reacting at least one aminonitrile with water has the following steps: (1) at least one aminonitrile is reacted with water at a temperature from 100 to 360 DEG C and pressure from 0.1 to 35.x 10 Pa, yielding a reaction mixture; (2) the reaction mixture is further reacted at a temperature from 150 to 400 DEG C and pressure lower than the pressure in step 1. The temperature and pressure are selected to yield a first gaseous phase and a first liquid or solid phase or a mixture of a first solid and a first liquid phase. The first gaseous phase is separated from the first liquid or solid phase or the mixture of a first liquid and a first solid phase is separated; and (3) the first liquid or solid phase or the mixture of a first liquid and first solid phase is mixed with a water-containing gaseous or liquid phase at a temperature from 150 to 360 DEG C and pressure from 0.1 to 30 x 10 Pa, yielding a product mixture. Also disclosed are other embodiments of this process and the thus produced polyamides.
Abstract:
A process is disclosed for preparing products from the reaction of polyasparaginic acid imides with aminoacids by reacting aminoacids with polyasparaginic acid imides in an aqueous medium at pH values at which at least 5 % of the amino groups of the aminoacids having a non-protonated form are in equilibrium with those having a protonated form. Also disclosed is the use of the thus obtained reaction products and of products from the reaction of polyasparaginic acid imides with alkanolamines or aminated C1-C30-fatty alcohol alkoxilates which contain up to 50 % by moles of polymerized ethylene and/or propylene oxide per mole of fatty alcohol. These products are useful as additives for washing and cleaning agents, as scale inhibitors and as dispersing agents.
Abstract:
Described is a method of producing polymers of aspartic acid by reacting (a) maleic acid anhydride and (b) ammonia and/or primary or secondary amines essentially in the molar ratio (a):(b) of 1:0.1 to 1:3 to give half-amides of maleic acid or fumaric acid, or their ammonium salts, at temperatures of up to 100 DEG C and subsequently condensing the reaction products with each other, optionally also with compounds capable of condensing with them, at temperatures above 100 DEG C and optionally hydrolysing the condensation products. Also described is the use of the polymers thus produced as scale inhibitors, pigment dispersants and additives to washing and cleaning agents.