FILM-FORMING RADIATION-CROSSLINKING ADHESIVE

Radiation-crosslinkable hot-melt adhesives containing more than 50% of polyurethane polymers which contain at least one radiation-polymerizable reactive group. The radiation-crosslinkable hot-melt adhesive is prepared by reacting a) a reactive PU prepolymer having a particular block structure b) 20...

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Bibliographic Details
Main Authors MOELLER THOMAS, LACK MELANIE, KRLEJOVA ANDREA
Format Patent
LanguageEnglish
Published 21.03.2013
Subjects
ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE
ADHESIVES
CHEMISTRY
DYES
LAYERED PRODUCTS
LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
METALLURGY
MISCELLANEOUS APPLICATIONS OF MATERIALS
MISCELLANEOUS COMPOSITIONS
NATURAL RESINS
NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL
PAINTS
PERFORMING OPERATIONS
POLISHES
TRANSPORTING
USE OF MATERIALS AS ADHESIVES
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Summary:Radiation-crosslinkable hot-melt adhesives containing more than 50% of polyurethane polymers which contain at least one radiation-polymerizable reactive group. The radiation-crosslinkable hot-melt adhesive is prepared by reacting a) a reactive PU prepolymer having a particular block structure b) 20 to 95 mol % of at least one low-molecular-weight compound (B) containing a radically polymerizable double bond and a group reacting with an NCO group; c) 0 to 50 mol % of at least one compound (C) having at least one group reactive to NCO groups but no group that is polymerizable under radical conditions, with a molar mass of 32 to 5000 g/mol; d) 5 to 50 mol % of at least one radical photoinitiator (D) having a primary or secondary OH group, as well as optionally further polymers and/or auxiliary substances. The adhesives can be cured for bonding nonwoven substrates or for coating labels, tapes, films and plasters with pressure-sensitive adhesive coatings.
Bibliography:Application Number: US201213673631