摘要:
A multilayer protective tape for rotor blades of wind energy turbines said tape having a protective top layer comprising a polymer film and an adhesive bottom layer, wherein the top layer has a continuous surface (S) that is outwardly curved or outwardly trapezoidal surface such that the tape has a cross-sectional profile having an inner section between two lateral sections and wherein the inner section has a thickness (Ti) made up by the thickness of the top layer and adhesive bottom layer that is greater than the thickness of at least one of the lateral sections (T1,T2) made up by the thickness of the top layer and adhesive bottom layer and wherein the thickness (T1 or T2) of at least one lateral section is at most 600 μm and the thickness of the inner section (Ti) is at least 330 μm. Also provided are processes for making profiled tapes and methods for applying the tapes to rotor blades and blades containing protective tapes.
摘要:
A multilayer protective tape for rotor blades of wind energy turbines said tape having a protective top layer comprising a polymer film and an adhesive bottom layer, wherein the top layer has a continuous surface (S) that is outwardly curved or outwardly trapezoidal surface such that the tape has a cross-sectional profile having an inner section between two lateral sections and wherein the inner section has a thickness (Ti) made up by the thickness of the top layer and adhesive bottom layer that is greater than the thickness of at least one of the lateral sections (T1,T2) made up by the thickness of the top layer and adhesive bottom layer and wherein the thickness (T1 or T2) of at least one lateral section is at most 600 μm and the thickness of the inner section (Ti) is at least 330 μm. Also provided are processes for making profiled tapes and methods for applying the tapes to rotor blades and blades containing protective tapes.
摘要:
A multilayer pressure sensitive adhesive (PSA) film having a first acrylic pressure sensitive adhesive layer and an opposing second acrylic pressure sensitive adhesive layer, wherein the first pressure sensitive adhesive layer has a glass transition temperature Tg≧0° C. and a content of a strongly polar acrylate of 7.5 to 15 wt.-% in its precursor, and the second pressure sensitive adhesive layer has a Tg≦0° C. and contains 0.5 to 12 wt.-% of a strongly polar acrylate in its precursor, wherein the content of the strongly polar acrylate of the precursor of the first pressure sensitive adhesive layer exceeds the content of the strongly polar acrylate of the precursor of the second pressure sensitive adhesive layer by at least 2 wt.-% and wherein the Tg of the first pressure sensitive adhesive layer exceeds the Tg of the second pressure sensitive adhesive layer by at least 5° C.
摘要:
The invention relates to a continuous self-metered process of forming a multilayer film comprising at least two superimposed polymer layers comprising the steps of: (i) providing a substrate (5); (ii) providing two or more coating knives (2, 3, 4) which are offset, independently from each other, from said substrate (5) and/or from an adjacent coating knife to form at least one substrate gap (9) relative to the surface of the substrate (5) and at least one outlet gap (10) relative to the surface of an adjacent coating knife; (iii) moving the substrate (5) relative to the coating knives (2, 3, 4) in a downstream direction (6), (iv) providing curable liquid precursors of the polymers (I, II, III) to the upstream side of the coating knives (2, 3, 4) thereby coating the two or more precursors (I, II, III) through the respective gaps (9, 10) as superimposed layers (12, 13, 14) onto the substrate (5); (v) optionally providing one or more solid films (1 1) and applying these essentially simultaneously with the formation of the adjacent lower polymer layer, and (vi) curing the precursor of the multilayer film thus obtained; wherein a lower layer of a curable liquid precursor (I, II, III) is covered by an adjacent upper layer of a curable liquid precursor (I, II, III) or a film (1 1), respectively, essentially without exposing said lower layer of a curable liquid precursor (I, II, III).
摘要:
A continuous self-metered process of forming a multilayer film comprising at least two superimposed polymer layers comprising the steps of: providing a substrate; providing two or more coating knives which are offset, independently from each other, from said substrate to form a gap normal to the surface of the substrate; moving the substrate relative to the coating knives in a downstream direction, providing curable liquid precursors of the polymers to the upstream side of the coating knives thereby coating the two or more precursors through the respective gaps as superimposed layers onto the substrate; optionally providing one or more solid films and applying these essentially simultaneously with the formation of the adjacent lower polymer layer, and curing the precursor of the multilayer film thus obtained; wherein a lower layer of a curable liquid precursor is covered by an adjacent upper layer of a curable liquid precursor or a film, respectively, essentially without exposing said lower layer of a curable liquid precursor.
摘要:
The invention relates to a continuous self-metered process of forming a multilayer film comprising at least two superimposed polymer layers comprising the steps of: (i) providing a substrate (5); (ii) providing two or more coating knives (2, 3, 4) which are offset, independently from each other, from said substrate (5) and/or from an adjacent coating knife to form at least one substrate gap (9) relative to the surface of the substrate (5) and at least one outlet gap (10) relative to the surface of an adjacent coating knife; (iii) moving the substrate (5) relative to the coating knives (2, 3, 4) in a downstream direction (6), (iv) providing curable liquid precursors of the polymers (I, II, III) to the upstream side of the coating knives (2, 3, 4) thereby coating the two or more precursors (I, II, III) through the respective gaps (9, 10) as superimposed layers (12, 13, 14) onto the substrate (5); (v) optionally providing one or more solid films (1 1) and applying these essentially simultaneously with the formation of the adjacent lower polymer layer, and (vi) curing the precursor of the multilayer film thus obtained; wherein a lower layer of a curable liquid precursor (I, II, III) is covered by an adjacent upper layer of a curable liquid precursor (I, II, III) or a film (1 1), respectively, essentially without exposing said lower layer of a curable liquid precursor (I, II, III).
摘要:
The present invention relates to a method of making a self-stick foam adhesive, comprising a. a crosslinked (meth)acrylate polymer comprising repeating units derivable from a monomer composition comprising iv. 55 to 97.4 wt. % of one or more alkyl(meth)acrylate monomers, the alkyl groups of which comprise from 4 to 14 carbon atoms v. 2.5 to 40 wt. % of one or more ethylenically unsaturated monomers comprising a nitrogen- or oxygen containing heterocyclic ring vi. 0.1 to 5 wt. % of one or more polar comonomers b. 1 to 60 parts by weight of one or more hydrogenated resin tackifier per 100 parts by weight of the cross-linked (meth)acrylate polymer and c. 1 to 20 parts by weight microspheres per 100 parts by weight of the cross-linked (meth)acrylate polymer, the method comprising polymerizing monomer components of the monomer composition and wherein at least part of the polymerization is carried in the presence of crosslinking agent, the total amount of crosslinking agent used in the polymerization being between 0.01 and 2 parts by weight per 100 parts by weight of the monomer composition, 1 to 60 parts of one or more hydrogenated resin tackifier per 100 parts by weight of the monomer composition and 1 to 20 parts microspheres per 100 parts of the monomer composition and wherein the polymerization is initiated by radiation substantially in the absence of solvent. The present invention also relates to a self-stick foam adhesive obtainable by such method.
摘要:
The present invention relates to a multilayer pressure sensitive adhesive (PSA) film having adhesive properties at its first and second main surface, wherein the film comprises at least two superimposed layers of a polymeric pressure sensitive adhesive foam material and optionally one or more intermediate layers of a polymeric foam material, wherein the PSA film is obtainable by a continuous self-metered process comprising the steps of (a) providing a substrate, (b) providing two or more coating knives which are offset, independently from each other, from said substrate to form a gap normal to the surface of the substrate, (c) moving the substrate relative to the coating knives in a downstream direction, (d) providing curable liquid precursors of the polymeric pressure sensitive adhesive foam materials and optionally of the polymeric foam material to the upstream side of the coating knives thereby coating the two or more precursors through the respective gaps as superimposed layers onto the substrate, (e) optionally providing one or more protective liners and applying these along the upstream side of the coating knives, and (f) curing the precursor of the multilayer film thus obtained, wherein a lower layer of the curable liquid precursor is covered by an adjacent upper layer of the curable liquid precursor, essentially without exposing said lower layer of a curable liquid precursor.
摘要:
Described herein is a UV-radiation curable pressure sensitive adhesive comprising: a polymerization reaction product of: (a) 0.5 to 25 wt % of a hydroxyl-containing (meth)acryate monomer of formula (I): wherein R1 is CH3 or H; and R2 is (i) a hydrocarbon moiety comprising at least 3 carbon atoms and a hydroxide group, or (ii) the hydrocarbon moiety comprising at least 4 carbon atoms, a catenary heteroatom, and a hydroxide group; (b) 0 to 3 wt % of polar crosslinkable monomer; (c) 40 to 99.5 wt % of a C4 to C20 (meth)acrylate ester monomer; (d) 5 to 30 parts of a hydrogenated hydrocarbon tackifier per 100 parts the weight sum of all monomers; and (e) 0.01 to 3 parts (solid/solid) of a cross-linking agent per 100 parts the weight sum of all monomers; and wherein the polymerization reaction product is substantially free of solvent.
摘要:
Acrylic copolymer pressure sensitive adhesive compositions containing surface-modified nanoparticles are described. The surface-modified nanoparticles are based on nanoparticles having a silica surface and a plurality of silane surface-modifying groups covalently bonded to the silica surface. Although some of the silane surface modifying groups may be non-reactive, at least 25 mole percent, and up to 100 mole percent, of the silane surface-modifying groups are reactive silane surface-modifying groups.