Showing papers on "Chemical resistance published in 1973"
Patent•
09 Jul 1973
TL;DR: In this article, a grafting reaction was used to obtain a superficial layer of modified glass, which had improved hydrolytic and chemical resistance as well as improved water repellency and mechanical characteristics.
Abstract: Glass having improved hydrolytic and chemical resistance as well as improved water repellency and mechanical characteristics is obtained by reacting the glass surface with an organoborosiloxane polymer, substituted by one or more of alkyl, aryl, alkoxy, acyl radicals, said organoborosiloxane polymer containing no free hydroxy groups in the presence of one or more organic Ti, Zr, Sn, v compounds at a temperature comprised between 200° and 400°C in order to obtain, through a grafting reaction, a superficial layer of modified glass.
33 citations
Patent•
16 Mar 1973
TL;DR: In this paper, a novel cured resin is produced by reacting an active hydrogen-containing compound with a solution in a polymerizable unsaturated monomer of the NCO group-containing distillation residue obtained in the production of tolylene diisocyanate from tolene diamine or its salt and phosgene, in the presence of a polymerization catalyst, and the resin thus obtained is superior in thermal resistance, mechanical strength, adhesion, solvent resistance, chemical resistance etc.
Abstract: A novel cured resin is produced by reacting an active hydrogencontaining compound with a solution in a polymerizable unsaturated monomer of the NCO group-containing distillation residue obtained in the production of tolylene diisocyanate from tolylene diamine or its salt and phosgene, in the presence of a polymerization catalyst, and the resin thus obtained is superior in thermal resistance, mechanical strength, adhesion, solvent resistance, chemical resistance, etc. to a polymer obtained by polymerizing the above polymerizable unsaturated monomer alone in the same manner.
22 citations
Patent•
04 Sep 1973TL;DR: New curable monomeric aromatic imidodicarboxylic acid diallyl esters, such as 4-allyloxy carbonyl-N-(ally-loxycarbonyl)-methyl)phthalimide, 1,2-ethylene bis (4-ally-oxycarbONYlphthalimides), or N,N'-allyloxcarbonyllmethyl) pyromellitimide as mentioned in this paper, are especially useful as electronics materials.
Abstract: New curable monomeric aromatic imidodicarboxylic acid diallyl esters, such as 4-allyloxycarbonyl-N-(allyloxycarbonyl-methyl)phthalimide, 1,2-ethylene bis (4-allyloxycarbonylphthalimide), or N,N'-allyloxycarbonylmethyl) pyromellitimide. When heated in the presence of a free radical initiator, these monomers give cured polymers having very superior mechanical strength, thermal stability, chemical resistance and electrical properties. If this polymerization is stopped before the reaction mixture is gelled, prepolymers can be obtained. The cured polymers are especially useful as electronics materials and engineering plastics.
9 citations
Patent•
06 Mar 1973
TL;DR: In this article, a polyfunctional polyester is obtained by reacting a linear polyester having a number average molecular weight of about 1,000 to about 8,000 and a ratio of the terminal carboxyl group to the terminal hydroxyl group of at least 1 with a diepoxide at the epoxy group.
Abstract: A resin composition suitable for use as paints is prepared by blending a polyfunctional high-molecular-weight linear polyester having a number average molecular weight of at least about 6,000 with an amino resin generally known as aminoplast or a polyisocyanate such as aliphatic or aromatic diisocyanate. The polyfunctional polyester is obtained by reacting a linear polyester having a number average molecular weight of about 1,000 to about 8,000 and a ratio of the terminal carboxyl group to the terminal hydroxyl group of at least 1 with a diepoxide at the epoxy group to the terminal carboxyl group ratio of from 0.5 to 2. The composition can give a baked film having excellent hardness, adhesion, chemical resistance, soiling resistance, and impact resistance.
6 citations
TL;DR: The resistance to chemical attack of polymer composites based on ash, birch, elm, and maple has been evaluated for a representative range of corrosive reagents as mentioned in this paper.
5 citations
Patent•
24 Jul 1973TL;DR: In this paper, a novel polyhydantoin is produced by heating at a temperature of 100.degree to 350.degree, where each compound represented by the formula is a divalent aliphatic, cyclo-aliphatic or aromatic residue.
Abstract: A novel polyhydantoin is produced by heating at a temperature of 100.degree. to 350.degree.C. at least one compound represented by the formula, wherein R is a divalent aliphatic, cycloaliphatic, or aromatic residue, and R'' and R" are independently hydrogen or monovalent aliphatic, cycloaliphatic, or aromatic residues. The said polyhydantoin is excellent in thermal resistance, electrical strengths, mechanical strengths, and chemical resistance, and may be used as a material for molding, lamination, impregnation, and adhering.
2 citations