Emulsion polymers, contain an activator, METHOD FOR PRODUCING AND ITS APPLICATION IN TWO-or multicomponent system

摘要

FIELD: chemistry.;SUBSTANCE: described is a core-cladding emulsive polymerisate with an activator included in the core, which is obtained from polymerising a mixture containing: a) 5-99.9 wt % of one or more mono-functional (meth)acrylate monomers with water solubility of 2 wt % at 20°C; b) 0-70 wt % of one or more monomers that copolymerisable with monomers a); c) 0-20 wt % of one or more compounds that are di- or multi-vinylenically unsaturated; d) 0-20 wt % of one or more polar monomers with water solubility of 2 wt % at 20°C, selected from (meth)acrylic acid and (meth)acrylamide, and c) 0.1-95 wt % of at least one activator. Wherein components a) to e) amount to 100 wt % of polymerisable components of the mixture, characterised by that e1) the activator is a compound of formula I where R¹ is methyl; X is a linear alkanediiyl group with 1-18 carbon atoms; R² denotes a hydrogen atom or a linear or branched alkyl residue with 1-12 carbon atoms; R³, R⁴, R⁵, R⁶ and R⁷ independently denote a hydrogen atom and that e2) the activator e) is covalently bonded to the emulsive polymerisate. Also described is a method of producing said emulsive polymerisate by "core-cladding" polymerisation in an aqueous emulsion, wherein components a) to e) at the first step are polymerised in form of a core, and then a mixture of components a) to d) are polymerised thereon as cladding in at least an additional step. Components a) to e) for the core and components a) to d) for the cladding are selected such that in the resultant polymerisate, the glass transition temperature of at least one cladding T_GS is higher than the glass transition temperature of the core T_GK, wherein the glass transition temperature of at least one cladding T_GS is higher than 100°C, wherein the glass transition temperature T_G is determined according to the EN ISO 11357 standard. Described is a two- or multi-component system with a controlled working life, which is curable at room temperature using a redox system of initiators containing A) 0.8-69.94 wt % emulsive polymerisate according to claims 1-7 or obtained by a method according to claim 8; B) 30-99.14 wt % of one or more ethylenically unsaturated monomers; C) 0.05-30 wt % peroxides; optionally D) 0-60 wt% unsaturated oligomers; E) 0.01-2 wt % polymerisation inhibitor; and optionally F) 0-800 pts.wt auxiliary substances and additives; wherein the sum of components A)+B)+C)+D)+E) is 100 wt %, and the amount of F) relates to 100 pts.wt of the sum A)+B)+C)+D)+E). Wherein component A) and component C) are stored together, and before applying the system, at least one component B) is stored separately from A) and C), wherein the capacity of the separately stored component B) to cause swelling of the polymerisate A) is so high that the activator of the polymerisate A) fixed in the polymer can react with component C), or component A), part of component B) and component DC) are stored together, wherein part of component B) is selected such that the capacity of component B) to cause swelling of the polymerisate A) is so low that the activator of the polymerisate A) fixed in the polymer cannot react with component C). Also described is use of said two- or multi-component system as a component part of substances, such as resins from unsaturated polyesters and vinyl esters or adhesive substances, cast resins, polymer coatings for floors and other reactive coatings, sealants, impregnating compounds, binding compounds, compounds for making artificial marble and other artificial stones, compounds for reactive concrete inserts, tooth filling compounds, porous plastic moulds for ceramic articles.;EFFECT: obtaining two- or multi-component systems that are curable at room temperature, the working life of which can be controlled in a wide range and which, nevertheless, are quickly and completely curable before a certain moment in time without requiring energy or an external mechanical pulse.;13 cl, 2 tbl, 19 ex