Abstract:
Controlled thermal crosslinking in a polyacrylate-based composition is accomplished by a crosslinker-accelerator system for the thermal crosslinking of polyacrylates having functional groups suitable for entering into linking reactions with epoxide groups, comprising at leastone substance comprising at least one epoxide group (crosslinker) and at least one substance of the general formula (I) R1R2N—CR3R4—CR5R6—(CR7R8)n—NR9R10 (I) wherein the radicals R1, R2, R9 and R10 independently of one another are a hydrogen atom or a substituted or unsubstituted alkyl or cycloalkyl radical having 1 to 8 carbon atoms or an alkylene group bonded to the main chain and having 1 to 8 carbon atoms, where at least one of the radicals R1, R2, R9 and R10 is not a hydrogen atom; the radicals R3, R4, R5, R6, R7 and R8 independently of one another are a hydrogen atom or an alkyl group having 1 to 8 carbon atoms or form a 5-7-membered cycloalkylene group; and n is an integer from 0 to 4 (accelerator).
Abstract translation:基于聚丙烯酸酯的组合物中的受控热交联通过交联剂 - 促进剂体系完成,所述交联剂 - 促进剂体系用于具有适于进入与环氧基团的连接反应的官能团的聚丙烯酸酯的热交联,所述交联剂加速剂体系包含至少一种包含至少一个环氧基团的物质(交联剂) 和其中基团R 1,R 2,R 9和R 10彼此独立地为氢原子或取代或未取代的至少一种通式(I)R 1 R 2 N-CR 3 R 4 -CR 5 R 6 - (CR 7 R 8)n -NR 9 R 10(I) 具有1至8个碳原子的烷基或环烷基或与主链键合且具有1至8个碳原子的亚烷基,其中基团R 1,R 2,R 9和R 10中的至少一个不是氢原子; R 3,R 4,R 5,R 6,R 7和R 8彼此独立地为氢原子或具有1至8个碳原子的烷基或形成5-7元环亚烷基; n为0〜4的整数(促进剂)。
Abstract:
Multi-phase polymer composition comprising a comb polymer (A) which forms a continuous acrylate phase and a discontinuous hydrocarbon phase, and at least one hydrocarbon compound (B) which is soluble in the hydrocarbon phase of the comb polymer (A), an adhesive mass comprising the multi-phase polymer composition.
Abstract:
An adhesive tape, with a carrier material, has an acrylate-based foam layer bearing at least one layer of pressure-sensitive adhesive. The pressure-sensitive adhesive (a) being composed of a mixture of at least two different synthetic rubbers, more particularly based on vinylaromatic block copolymers, (b) comprising a resin which is not soluble in the acrylates forming the foam layer, and (c) being chemically uncrosslinked.
Abstract:
The invention relates to a process for preparing pressure-sensitive adhesives (PSAs) which have high molar masses in combination with a narrow molar mass distribution, and also to PSAs, especially polyacrylate-based PSAs, prepared accordingly.It has been found that, surprisingly, polymers with high molar masses and a narrow molar mass distribution, more particularly polyacrylates with high molar masses and a narrow molar mass distribution, can be prepared outstandingly in particular by means of RAFT processes in the presence of a diradical initiator which undergoes thermal cyclization to form a diradical, these polymers being suitable for use as high-shear-strength PSAs.
Abstract:
Adhesives and pressure-sensitive adhesives comprising polymerization products of acrylates, the adhesives being meltable and comprising polymerization products of esters of (meth)acrylic acid and (meth)acrylic acid, the polymerization product having a molecular weight Mn of greater than 50 000 g/mol and Mw of greater than 500 000 g/mol.
Abstract:
Monomer composition comprising (i) acrylic monomers selected from the group consisting of (meth)acrylic acid and (meth)acrylic esters; (ii) orthoalkyl phenyl ketone- and/or orthoalkyl phenyl aldehyde-functionalized (meth)acrylate monomers; and (iii) optionally, further olefinically unsaturated monomers having functional groups; process for preparing a first polymer composition comprising the free-radical polymerization of the monomer composition, and polymer composition obtainable by this process; composition comprising the polymer composition and a dienophile which can react with hydroxy-ortho-quinodimethane functional groups in a Diels-Alder or hetero-Diels-Alder reaction and conversion of this composition to a crosslinked polymer composition.
Abstract:
Crosslinked pressure-sensitive adhesives (PSAs) based on polymers of branched macromolecules each comprising a main chain and one or more sidechains pendent to the main chain, the constitutional units thereof originating from a) X wt % of one or more acrylic and/or methacrylic esters, with 80 =1000 g/mol, and the respective amounts of constitutional units originating from a), b) and c) can be the same in each case or differ by not more than 1%, and where a), b) and c) may in each case be the same or different monomers, have detachment properties which can be set independently of one another.
Abstract:
Method for producing polyacrylate adhesive compounds with a narrow molar mass distribution by radical polymerization and subsequent decolorization of colored reaction products resulting therefrom.
Abstract:
The invention relates to a method for producing polyacrylate adhesive compounds with a narrow molar mass distribution by means of a radical polymerization and a subsequent increase of the molar masses by reacting with bis- or multi-dienyl compounds, in particular with α,ω-bis-dienyl compounds, in order to increase the cohesion in particular.
Abstract:
Crosslinker-accelerator system for the thermal crosslinking of polyacrylates with functional groups suitable for entering into linking reactions with cyclic ethers, more particularly epoxide groups or oxetane groups, comprising at least one substance containing epoxide or oxetane groups (crosslinker) and at least one substance with an accelerating action for the linking reaction at a temperature below the melting temperature of the polyacrylate (accelerator).