| 摘要 |
The invention relates to a process for preparing a dispersion-based or hotmelt pressure-sensitive adhesive based on at least one polymer, which involves crosslinking the at least one polymer, the polymer having functional groups Y, the polymer additionally being admixed with at least one kind of functionalized particles which have at least one polymeric base unit, characterized in that the particles have a monomer as base unit, the monomer having at least one kind of functional groups Z which are not able to enter into any reaction with the functional group Y and which, by thermal energy, electromagnetic radiation, particulate radiation and/or sound energy, are converted into the group X, the crosslinking of the polymer being brought about at least in part by a reaction of the functional groups X of the particles and of the functional groups Y of the polymer, and additionally to pressure-sensitive adhesives based on at least one crosslinked polymer component, wherein the crosslinking of the polymer component is brought about at least partly through incorporation of functionalized particles, the particles having at least one polymeric base unit and also a monomer with one kind of functional groups Z, these groups Z, following conversion into the groups X by means of thermal energy, electromagnetic radiation, particulate radiation and/or sound energy, being capable of reacting with functional groups Y that are present in the polymer component, and also to the use of surface-modified functionalized particles having a polymeric base unit as crosslinking reagents for the crosslinking of polymers for preparing pressure-sensitive adhesives. |
| 主权项 |
1. A process for preparing a pressure-sensitive adhesive, the process comprising the steps of:
providing a polymer, having reactive centers comprising functional groups Y, preparing functionalized polymeric particles by emulsion polymerization, miniemulsion polymerization or microemulsion polymerization, or by dispersion polymerization, wherein the functionalized polymeric particles comprise a monomer composition, wherein the monomer composition comprises nonfunctionalized base monomers at a concentration of 60% to 100% by weight of the total monomer composition, wherein the functionalized polymeric particles comprise monomers having functional groups Z which themselves do not react with functional groups Y, but which are configured to be converted to functional groups X which are reactable with functional groups Y, wherein the functionalized polymeric particles have particle diameters that are less than 100 nm; converting at least some of the functional groups Z of the functionalized polymeric particles, by supply of energy, into functional groups X which are capable of reacting with the functional groups Y of the polymer; and reacting the functional groups X of the functionalized polymeric particles with the functional groups Y of the polymer to crosslink said polymer with said functionalized polymeric particles. |
