摘要:
The present invention relates to a process for preparing (meth)acrylic esters of alcohols having C—C triple bonds, to processes for their preparation, and to their use.
摘要:
A process for producing a clearcoat and a multi-component composition. The process comprises applying the multi-component composition to a primed substrate, an unprimed substrate, or a coated substrate. The multi-component composition comprises (A) a binder containing on average at least one isocyanate-reactive functional group, (B) an adduct prepared from (b1) a diisocyanate and (b2) a compound of the general formula I containing an isocyanate-reactive group: and (C) at least one cross-linking agent containing on average at least one isocyanate group and at least one functional group which may be activated by actinic reaction.
摘要:
Mixtures curable thermally and with actinic radiation and containing carbamate and/or allophanate groups, comprising (A) at least one of (A1) low molecular mass compounds, oligomers and polymers containing allophanate groups, carbamate groups, and carbamate and allophanate groups, and (A2) low molecular mass compounds, oligomers and polymers containing allophanate groups, carbamate groups, and carbamate and allophanate groups, and additionally allophanate- and/or carbamate-reactive functional groups, which are substantially or entirely free from reactive functional groups which contain at least one bond which can be activated with actinic radiation, and (C) at least one constituent containing on average per molecule at least one reactive functional group having at least one bond which can be activated with actinic radiation; with the proviso that if only (A1) is used, the mixtures further comprise (B) at least one of low molecular mass compounds, oligomers and polymers containing allophanate- and/or carbamate-reactive functional groups.
摘要:
The invention relates to a powder-slurry that can be hardened by actinic radiation or by thermal means, comprising (I) components containing functional groups (A) which render them hardenable by actinic radiation and components containing complementary functional groups (B) which render them thermally hardenable, in a weight ratio of 50:1 to 1:50 and/or comprising (II) components containing the functional groups (A) and (B) which render them thermally hardenable and hardenable by actinic radiation in a molar ratio of 100:1 to 1:100.
摘要:
A mixture and method for preparing a composition curable thermally and with actinic radiation comprising a binder free from carbon-carbon double bonds activatable with actinic radiation, at least one blocked or unblocked polyisocyanate having at least one soft, flexibilizing segment, and at least one unsaturated polyfunctional urethane that is free from isocyanate-reactive functional groups and contains on average per molecule more than four carbon-carbon double bonds activatable with actinic radiation and at least one hardening segment.
摘要:
A composition curable with actinic radiation, containing at least one compound (A) selected from the group consisting of p-menthadienes and olefinically unsaturated monomers, processes for preparing it, and the use thereof.
摘要:
Compounds which can be activated by actinic radiation, contain at least one urethane group, and have the general formula I: X[N(R)—C(O)—O—C(R1R2)—C(R3R4)—Y-Z]n (I), in which the index and the variables have the following meanings: n is an integer from 1 to 5; X is an at least n-valent, substituted or unsubstituted organic radical; R is a hydrogen atom or a monovalent substituted or unsubstituted organic radical; R1-R4 independently of one another are a hydrogen atom, halogen atom or monovalent, substituted or unsubstituted organic radical, it being possible for at least two radicals to be cyclically linked to one another; Y is a divalent, linking functional group containing at least one oxygen atom; and Z is an organic radical containing at least one group which can be activated by actinic radiation; with the proviso that at least for n=1 the radical R and/or the radical X are/is substituted by at least one substituent of the general formula II: Z—Y— (II), in which the variables Z and Y are as defined above; processes for preparing them, and their use.
摘要:
A heat-curable composition comprising (I) at least one constituent whose molecule comprises on average (A) at least one functional group containing at least one bond which may be activated by means of heat and/or actinic radiation, and/or (B) at least one reactive functional group which is able to undergo thermal crosslinking reactions with groups of its own kind and/or with complementary reactive functional groups, with the proviso that there are always groups (A) and (B) in the composition; said constituent excluding the polyurethane dispersion synthesized from aliphatic polyisocyanates, compounds containing isocyanate-reactive functional groups and containing bonds that may be activated with actinic radiation, low molecular mass aliphatic compounds containing isocyanate-reactive functional groups, compounds containing isocyanate-reactive functional groups and dispersing functional groups, neutralizing agents for the dispersing functional groups, blocking agents for isocyanate groups, and/or compounds containing blocked isocyanate groups, the blocked isocyanate groups being introduced into the polyurethane dispersion by the reaction of the blocking agents with isocyanato-containing polyurethane prepolymers; and (II) from 0.5 to 15% by weight, based on the solids of the heat-curable composition, of at least one C-C-cleaving initiator.
摘要:
The present invention relates to a multilayer coating comprising at least one basecoat layer and one topcoat layer, the coating being preparable by A. applying a component (I), if desired radiation-curable component, based on polyurethane resins, polyacrylate resins, polyester resins and/or amino resins and also mixtures thereof to a substrate and subjecting it to thermal partial crosslinking or drying at temperatures of less than 100° C., preferably 60-80° C., and B. applying a topcoat to this coating layer, and subsequently carrying out radiation curing.