摘要:
The invention provides curable coating compositions which have improved comparability with other coating compositions and which provide improved scratch and mar resistance. The compositions comprise a film-forming component (A), a catalyst (B) for the film-forming reaction comprising one or more strong acids having a pKa of 2.5 or less, and a volatile catalyst carrier (C) comprising one or more tertiary amines having a boiling point of 100 degrees C. The film-forming component (A) comprises one or more crosslinking agents (b) at least one of which is an aminoplast curing agent (bi) having from 0.5 to 3.5 moles of NH per mole of aminoplast curing agent (bi). The invention also provides a method of making thermally cured films having improved scratch and mar as well as a method of making multilayer-cured films.
摘要:
The invention provides coating compositions having improved scratch and mar resistance. The curable coating compositions of the invention comprise a film-forming component (A) comprising one or more active hydrogen containing components (a), and one or more curing agents (b) comprising at least one aminoplast resin (bi) having from 0.5 to 3.5 moles of NH per mole of aminoplast resin (bi), a blocked acid catalyst (B) having a blocking agent which is not a tertiary amine, and a tertiary amine (C) present in an amount equal to 10 to 150% by weight of the blocking agent. The invention farther provides a method of making cured coated substrates having improved scratch and mar resistance as well as a method of making multilayer coating compositions.
摘要:
A rule assembly includes a housing, a reel rotatably mounted in the housing, and an elongated blade having an end hook member on a free end thereof. The elongated blade is arranged to be wound on the reel and to be extendable through an opening in the housing. The end hook member is formed of sheet metal to include a mounting portion and a hook portion bent at a generally right angle from an end of the mounting portion. The end hook member includes a pair of generally upwardly extending side edges, a generally laterally extending lower edge, and recessed edge portions disposed at corner portions at which the upwardly extending side edges and the laterally extending lower edge intersect.
摘要:
Heat-curable thixotropic mixtures containing carbamate and/or allophanate groups, comprising (A) at least one oligomer and/or polymer selected from the group consisting of oligomers and polymers containing allophanate groups, carbamate groups, and carbamate and allophanate groups, and (B) at least one thixotropic agent selected from the group consisting of urea or urea derivatives preparable by reacting at least one amine and/or water with at least one polyisocyanate, with the proviso that the mixture in question, based on its solids, further comprises at least one silica as thixotropic agent (C), and contains the thixotropic agent (B) in an amount of from 0.1 to 5% by weight if the oligomers and polymers (A) contain no allophanate groups; processes for preparing the mixtures, and their use as coating materials, adhesives and sealing compounds.
摘要:
Clearcoat coating composition for automotive exterior coatings with improved intercoat adhesion to a subsequently applied coating layer and improved flexibility contains (a) a first vinyl copolymer prepared from a monomer mixture including no more than about 35% by weight of nonfunctional monomers that has carbamate functionality and hydroxyl functionality, at least part of the hydroxyl functionality being on monomer units including an optionally branched alkyl group having at least about six carbon atoms; (b) a second vinyl copolymer having hydroxyl functionality, preferably primary hydroxyl functionality; and (c) a curing agent component that includes at least an aminoplast curing agent and optionally a polyisocyanate curing agent. The polyisocyanate curing agent is preferably blocked with a blocking agent that volatilizes during the cure reaction, regenerating a reactive isocyanate group.
摘要:
A rule assembly includes a housing, a reel rotatably mounted in the housing, and an elongated blade having an end hook member on a free end thereof. The elongated blade is arranged to be wound on the reel and to be extendable through an opening in the housing. The end hook member is formed of sheet metal to include a mounting portion and a hook portion bent at a generally right angle from an end of the mounting portion. The end hook member includes a pair of generally upwardly extending side edges, a generally laterally extending lower edge, and recessed edge portions disposed at corner portions at which the upwardly extending side edges and the laterally extending lower edge intersect.
摘要:
A rule assembly includes a housing, a reel rotatably mounted in the housing, and an elongated blade having an end hook member on a free end thereof. The end hook member includes a mounting portion having a length dimension and a top surface area and a hook portion having a width dimension and a front surface area, where a ratio of the width dimension of the hook portion to the length dimension of the mounting portion is greater than or equal to 1, a ratio of the front surface area of the hook portion to the top surface area of the mounting portion is greater than or equal to 1.1, and at least two-thirds of the mass of the hook portion lies outside a center section that includes one third of the hook portion's width.