摘要:
A thermosetting powder coating composition comprising:A. a functional glycidyl group-containing graft copolymer ofI. 10 to 40 percent of a linear polyester having a number average molecular weight of 600 to 3,000 and containing one terminal carboxyl group andIi. 60 to 90 percent of acrylic copolymer of ii-a) 6.5 to 60 percent of at least one of glycidyl esters having the formula ##STR1## wherein R.sub.1 is hydrogen or methyl, ii-b) 10 to 93.5 percent of at least one of acrylic monomers having the formula CH.sub.2 .dbd.C(R.sub.2)COOR.sub.3 wherein R.sub.2 is hydrogen or methyl and R.sub.3 is alkyl having 1 to 14 carbon atoms, cyclohexyl or hydroxyalkyl having 1 to 4 carbon atoms, and ii-c) 0 to 65 percent of additional monomers selected from the group consisting of acrylonitrile, methacrylonitrile and styrenes having the formula ##STR2## wherein R.sub.4 is hydrogen or alkyl having 1 to 4 carbon atoms, said graft copolymer having a softening point of 70.degree. to 110.degree. C and a number average molecular weight of 2,000 to 30,000 and containing glycidyl group in an amount of 0.35 to 2.35 moles per kilogram of the graft copolymer; andB. at least one of polycarboxylic acids and anhydrides thereof in an amount of 0.6 to 1.2 moles in terms of carboxyl group per mole of the glycidyl group contained in the graft copolymer.
摘要:
A thermosetting powder coating composition comprising:(A) a graft copolymer ofA. 10 to 40 percent of a linear polyester having a number average molecular weight of 600 to 3,000 and containing one ethylenically unsaturated double bond only at one end of the molecule,B. 5 to 30 percent of at least one of glycidyl esters having the formula ##STR1## wherein R.sub.1 is hydrogen or methyl, and C. 10 TO 85 PERCENT OF AT LEAST ONE OF ACRYLIC COMPOUNDS HAVING THE FORMULA OF CH.sub.2 .dbd.C(R.sub.2)COOR.sub.3, wherein R.sub.2 is hydrogen or methyl and R.sub.3 is alkyl having 1 to 14 carbon atoms, cyclohexyl or hydroxyalkyl represented by ##STR2## wherein R.sub.4 is hydrogen, methyl or ethyl, said graft copolymer having a softening point of 70.degree. to 110.degree. C and a number average molecular weight of 2,000 to 30,000; and(B) at least one of polycarboxylic acids and anhydrides thereof in an amount of 0.6 to 1.2 moles in terms of carboxyl group per mole of the glycidyl group contained in the graft copolymer.
摘要:
A process for preparing a thermosetting powder coating composition comprising the steps of copolymerizing 5 to 25 wt.% of at least one of glycidyl acrylate and glycidyl methacrylate with 95 to 75 wt.% of an ethylenically unsaturated compound in a solvent having a boiling point of up to 170.degree. C to obtain a solution of copolymer, the copolymer having a number average molecular weight of 2,000 to 30,000 and a melt viscosity of 100 to 500 poises at 160.degree. C, uniformly dispersing a pigment into the copolymer solution, removing the solvent from the resulting mixture at a temperature of 170.degree. to 220.degree. C and reduced pressure, thereafter admixing a di- or tri-carboxylic acid cross-linking agent with the mixture with heating at a temperature of up to 120.degree. C, and pulverizing the solid mixture obtained.
摘要:
A composition for visible light sensitive electrodeposition coating which comprises (A) a photocurable resin having light sensitive groups capable of being crosslinked or polymerized by light irradiation and ionic groups, (B) a sensitizer which is excited by absorption of visible light and has a property to interact with the resin (A), (C) a water-insoluble polymerization initiator, and optionally, (D) at least one specific nitrogen-containing compound; and an image-forming method which comprises (i) coating the surface of a conductor by electrodeposition with the aforesaid composition, (ii) exposing the resulting film by electrodeposition by partially irradiating the film with visible light, and then (iii) contacting the resulting film with a developing solution to remove the unexposed areas.
摘要:
A visible radiation sensitive composition comprising:(A) a photosetting resin containing a photosensitive group capable of crosslinking or polymerizing by photoirradiation,(B) a sensitizer represented by the formula (i): ##STR1## wherein R.sub.1 and R.sub.2 are the same or different lower alkyl, and R.sub.3 is a hydrogen atom, lower alkyl group, alkoxyalkyl group, hydroxyalkoxyalkyl group or alkoxycarbonylalkyl group, and(C) a polymerization initiator.
摘要:
A powdery coating composition comprising (1) 10 to 40% by weight of a solid cross-linking agent having a softening point of 50.degree. to 120.degree. C. and prepared by heating 40 to 75% by weight of an acrylic resin having free hydroxyl groups and 60 to 25% by weight of an alkoxyaminotriazine at 50.degree. to 120.degree. C., and (2) 90 to 60% by weight of a base resin having a softening point of 60.degree. to 130.degree. C. and an acid value of up to 30 and containing 0.4 to 2.0 moles of free hydroxyl groups per kilogram of the resin, the alkoxyaminotriazine having 0 to 1 non-methylolated NH bond per triazine ring, at least 80% of the methylol groups of the alkoxyaminotriazine having been etherified with an aliphatic or alicyclic alcohol or ethylene glycol monoalkyl ether.
摘要:
The powdery coating composition of the present invention comprises:(i) 10 to 40% by weight of a solid cross-linking agent prepared by heating polyester and alkoxyaminotriazine, and(ii) 90 to 60% by weight of a base resin.An object of the present invention is to provide a powdery coating composition which will not pose any environmental pollution and has an outstanding property against bubbling.The above object can be fulfilled by using the solid cross-linking agent in combination with a base resin.
摘要:
A heat exchange device for powdery and granular materials configured to reduce adherence and accumulation of the materials and manufacturing time. The heat exchange device includes at least one substantially hollow disk-shaped heat exchanger among a plurality of heat exchangers that is disposed on the shaft about which the heat exchanger rotates. The hollow disc-shape heat exchanger includes a cutout recess part, plate surfaces extending from one side edge of the cutout recess part and forming a wedge-shaped plate surface, and a smoothly bulging projection formed at a central part of the heat exchanger. In addition, an opening is provided in the hollow disk-shaped heat exchanger at a tip end of the projection, and a shaft is inserted into the opening and joined to the hollow disc-shaped heat exchanger.
摘要:
An object of the present invention is to provide a heat exchange device for a powder and granular material, which is capable of suppressing an object to be processed from adhering/accumulating, and reducing the number of manufacturing processes (time), while keeping high heat efficiency, piston flowability and other advantages of a conventional device that uses wedge-shaped hollow rotating bodies. In order to achieve this object, a heat exchange device for a powder and granular material according to the present invention is configured such that at least one of a plurality of heat exchangers 30 to be disposed on a shaft 13 is formed as a substantially hollow disk-shaped heat exchanger in which a cutout recess part 31 directed from a circumferential edge of the heat exchanger toward a center of the same is provided; plate surfaces extending from one side edge 31a of the cutout recess part to another side edge 31b of a following cutout recess part are formed into a wedge-shaped plate surface 32 by gradually increasing a distance between the plate surfaces; a projection 33 that smoothly bulges in a horizontal direction as viewed from the side is formed at a central part of the heat exchanger; and an opening 34 is formed at a tip end of the projection, and the heat exchanger is disposed on the shaft by inserting the shaft into the opening.
摘要:
The present invention provides a method for forming a topcoat according to a 2-coat 1-bake system comprising the steps of applying to a substrate a thermosetting aqueous colored base coating composition, applying to the uncured surface of the base coat a clear coating composition, and curing the two coats by heating, wherein the clear coating composition is a thermosetting powder coating composition comprising: (A) an epoxy-containing resin; and (B) a curing agent containing acid anhydride (a) represented by formula X—COO—[CO—(CH2)m—COO]n—CO—X (1) and at least one species selected from the group consisting of acid anhydride (b) represented by the formula HO—[CO—(CH2)p—COO]q—H (2) and dibasic acid (c).