Abstract:
A method for chemically polishing a metal surface within a metal-polymer composite, where the composite includes at least one metal part and at least one part made of a polymer composition, the method including the step of: (i) contacting the surface of at least one metal part at least partially with an aqueous solution including an oxidizing agent and an alkaline agent, at a temperature and for a duration sufficient to obtain a shiny metal surface. Also a metal-polymer composite that includes at least one part made of a polymer composition and at least one chemically polished metal part and that is obtainable by the method and to a product including the metal-polymer composite.
Abstract:
The present invention relates to a composition including, by weight, the total being 100%: 50 to 99% of a curable resin and of a curing agent in a molar ratio in the range of 1/5 to 5/1, and 1 to 50% of a mixture: of a polyamide which includes at least one monomer resulting from the condensation of a diacid and of a diamine of formula (1) where: R1 is H or —Z1-NH2 and Z1 is an alkyl, a cycloalkyl or an aryl having up to 15 carbon atoms, and R2 is H or —Z2-NH2 and Z2 is an alkyl, a cycloalkyl or an aryl having up to 15 carbon atoms, R1 and R2 being either identical or different, and of an oligomer made from butadiene and acrylonitrile which are terminated by carboxyl functions or by amine functions, such as the reactive rubbers CTBN or ATBN; the polyamide and the oligomer being present in respective proportions of 1/10 to 10/1 by weight.
Abstract:
A method for producing metal-polymer composites which include at least one metal part and at least one part made of a polymer composition, the method including the steps of: treating the surface of at least one metal part at least partially with a solution of triazine thiol derivative to obtain a treated metal surface; and contacting the treated metal surface at least partially with at least one polymer composition so as to obtain a metal-polymer composite, wherein the polymer composition includes at least one semi-crystalline polyamide. Also, a metal-polymer composite that includes at least one part made of a polymer composition and at least one metal part and that is obtainable by the method and to a product including the metal-polymer composite.
Abstract:
The use of at least one semi-crystalline polyamide in a glass-charged amorphous polyamide resin for producing a composition which is more transparent than the resin. Polyamide-based transparent composition manufactured according to the use of the semi-crystalline polyamide, including: from 5.0 to 40.0% by weight of semicrystalline polyamide, from 20.0 to 80.0% by weight of at least one amorphous, transparent and at least partially cycloaliphatic polyamide, from 5.0 to 40.0%, preferably from 5.0 to 30.0%, by weight of glass filler, and optionally: from 0.0 to 5.0% by weight of PEBA, from 0.0 to 5.0% by weight of additives, with respect to the total weight of the composition.
Abstract:
The invention is directed in particular to a polyamide composition comprising:
(A) 70-99.9 wt. % of polyamide 6 and/or polyamide 66; (B) 0.01-30 wt. % of at least one long chain semi-crystalline polyamide; and (C) 0-30 wt. % of one or more additives, it being understood that (A), (B) and (C) add up to 100 wt. %.
It also concerns a process for its manufacture, its use for the manufacture of films, films comprising said polyamide compositions and their use for food packaging, the use of semi-crystalline long chain polyamide to improve the break stress of a film comprising polyamide 6 and/or polyamide 66 and a food packaging comprising said polyamide composition or said film.
Abstract:
The present invention relates to transparent polyamide-based composition, comprising: from 5.0 to 40.0% by weight of semi-crystalline polyamide, from 20.0 to 80.0% by weight of at least one amorphous, transparent and at least partially cycloaliphatic polyamide, from 0.0 to 5.0% by weight of PEBA, from 0.0 to 5.0% by weight of additives, and from 5.0 to 50.0%, preferably from 10.0 to 40.0% by weight, preferably from 20.0 to 30.0% by weight by weight of glass filler, where the glass filler, expressed as % by weight with respect to the total weight of filler, less than 60 wt. % silica (SiO2) and more than 5 wt. % of boron oxide (B2O3). The invention also relates to the manufacture of said composition, its use for the manufacture of transparent articles, said transparent articles and their process of manufacture.