Showing papers on "Chemical resistance published in 1971"
Patent•
19 Jan 1971
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.
5 citations
Patent•
11 Mar 1971
TL;DR: In this paper, the butadiene unit in the polymeric chain is more than 50 weight percent, and 1,2-butadiene bonding in the 1, 2 butadienes unit is more then 80 weight percent and is useful for a water-soluble and/or water-dispersible coating material.
Abstract: Alkali metal, ammonium or organic ammonium butadiene homo- or copolymer carboxylate, wherein number average molecular weight is in a range of 200 to 10,000, butadiene unit in the polymeric chain is more than 50 weight percent, 1,2-butadiene bonding in the butadiene unit is more than 80 weight percent, is useful for a water-soluble and/or water -dispersible coating material and is used a composition such as water-soluble, aqueous emulsion and electro-deposition paint and varnish, cured coating film of which has superior properties such as film hardness, abrasion resistance, bending resistance, adhesion, chemical resistance, solvent proof, weathering resistance, surface flatness and coulombic yield.
1 citations
TL;DR: In this paper, an experiment was conducted by heat polymerization of methyl methacrylate monomer (With addition of benzoyl peroxide as catalyst) impregnated in dried mortar, and its various properties, such as its strength, waterproof virtue, heat resistance, chemical resistance, etc.
Abstract: The abbreviation CPC may stand either for concrete-polymer composite, for concrete-plastics composite, or for concrete-polymer combination, like WPC which may stand either for wood-polymer composite, or for wood-plastics combination, as the present author chooses to use for convenience.CPC is a composite material developed for the purpose of improving the properties of concrete and mortar and is generally prepared from vinyl-type monomers impregnated in concrete or mortar used as base materials, by their polymerization either by heat or by radiation.In the experiment reported in this paper CPC has been prepared by heat polymerization of methyl methacrylate monomer (With addition of benzoyl peroxide as catalyst) impregnated in dried mortar, and its various properties, such as its strength, waterproof virtue, heat resistance, chemical resistance, are tested and discussed. In this case, the polymer loading (Percent) of CPC for testing is 13±0.5% by weight of the untreated mortar.The conclusion obtained from these experiments is summarized as follows(1) CPC has a structure that many voids in mortar used are filled by polymethyl methacrylate, and the polymer is incorporated into the mortar perfectly, so that its properties for example strength, water proofing property, chemical resistance, etc. are excellent compared with those of mortar as the base material.(2) The heat resistance and resistance to boiling water at 100°C, of CPC, are good, regardless of containing the polymer as a constituent.
1 citations