| 摘要 |
#CMT# #/CMT# Polyamide obtained by polymerization of carboxylic diacid and diamine monomers or their salts in the presence of multifunctional compounds (0.05-0.5 mol.%) having at least three functional groups (X1) and a monofunctional compound (0.5-2 mol.%) having a functional group (X2), is new. The functional groups (X1) and (X2) are carboxylic acids or amine groups. #CMT# : #/CMT# Independent claims are included for: (1) a composition comprising the polyamide present as a thermoplastic polymer or as an additive; and (2) a molded article obtained by injection-, injection/blow-, extrusion-, extrusion blow molding of the composition. #CMT#USE : #/CMT# The polyamide is useful to make the molded article (claimed) e.g. plastic articles. #CMT#ADVANTAGE : #/CMT# The polyamide has improved mechanical properties e.g. impact resistance and tensile strength, and has good rheological properties. #CMT#ORGANIC CHEMISTRY : #/CMT# Preferred Components: The multifunctional compound is of formula R[A-Y1] n, e.g. nitrilotrialkylamine (e.g. nitrilotriethylamine), dialkylenetriamine (e.g. diethylenetriamine), trialkylenetetramine or tetraalkylenepentamine, alkylene (e.g. ethylene), 4-aminoethyl-1,8, octanediamine, melamine, compounds obtained from the reaction of trimethylol propane or glycerol with the propylene oxide or amination of terminal hydroxyl groups to give a triamine compound of formula R1(A1-NH 2) 3. The monofunctional compound is a 2-carbon hydrocarbon compound comprising heteroatoms e.g. n-hexadecylamine-, n-octadecylamine-, n-dodecylamine-, acetic or lauric acid, benzylamine or benzoic acid. The functional groups of the multi- or mono functional compounds are identical. The multifunctional compound is present at 0.2-0.5 mol.%. The mono-functional compound is present at 0.5-1 mol.%. The ratio of the mono-functional compound to the multi-functional compound is 0.1:4. R : 2C hydrocarbon, cycloaliphatic or aromatic group e.g. 2,2,6,6-tetra-(beta -carboxyethyl) cyclohexanone, diaminopropane- N,N,N',N'-tetraacetic acid, 3,5,3',5'-biphenyltetracarboxylic acid, phtalocyanine- or naphtalocyanine acid derivative, 3,5,3',5'-biphenyltetracarboxylic acid, 1,3,5,7-naphthalenetetracarboxylic acid, 2,4,6-pyridinetricarboxylic, 3,5,3',5'-bipyridyltetracarboxylic acid, 3,5,3',5'-benzophenonetetracarboxylic acid, 1,3,6,8-acridinetetracarboxylic acid, trimesic acid, 1,2,4,5-benzenetetracarboxylic acid or 1,3,5-triazine-2,4,6-triaminocaproic acid; A : 1-20C aliphatic hydrocarbon carrying heteroatom; Y1 : -COOH or prim-/sec-NH 2 or its salts; n : 3-10; R1 : 1,1,1-triyl propane or 1,2,3-triyl-propane; and A1 : polyoxyethylenic group. #CMT#POLYMERS : #/CMT# Preparation (Disclosed): Preparation of the polyamide comprises polymerization of diacid and diamine monomers in the presence of multifunctional and monofunctional compounds capable of forming an amide function by reaction with either an aminated function or an acid function. Preferred Composition: The composition further comprises a reinforcer and/or filler. Preferred Components: The diamine is a 4-12 carbon diamine e.g. hexamethylenediamine or its salts. The diacid is a 4-12 carbon diacid e.g. adipic acid or its salts. The polyamide is a modified polyamide of viscosity of 80-120 according to International Organization for Standardization-307 at 25[deg]C with 0.5% of polymer in 90% of formic acid. #CMT#EXAMPLE : #/CMT# An equimolar salt (11.111 kg) of hexamethylenediamine and adipic acid, 2,2,6,6-tetra-(beta -carboxyethyl)cyclohexanone (81 g), benzoic acid (80 g), Silcolapse (RTM: Silicone anti-foam emulsion) (40 g) and distilled water (5 l) were polymerized in an autoclave at 90[deg]C to obtain the polyamide. |
