Method of making package viscoelastic compositions by polymerizing ethylenically-unsaturated materials using ionizing radiation

摘要

Methods of forming an adhesive composition including the steps of (a) combining a non-deaerated mixture comprising at least one free radically (co)polymerizable ethylenically-unsaturated material with a sealable packaging, wherein the packaging contains the non-deaerated mixture; (b) sealing the non-deaerated mixture in the packaging to form a sealed packaging; and (c) exposing the non-deaerated mixture in the sealed packaging to a source of ionizing radiation for a time sufficient to initiate (co)polymerization of at least a portion of the at least one free radically (co)polymerizable ethylenically-unsaturated material to form an adhesive composition in the sealed packaging. The (co)polymerization takes place essentially non-adiabatically. At least a portion of the packaging is meltable and mixable with the adhesive composition so as to provide a flowable coatable adhesive composition when the sealed packaging containing the adhesive composition is heated to a temperature sufficient to melt at least a portion of the packaging.

主权项

1. A method of forming an adhesive composition comprising the steps of:
(a) combining:
(i) a non-deaerated mixture comprising at least one free radically (co)polymerizable ethylenically-unsaturated material, wherein the mixture is non-heterogeneous; and(ii) a sealable packaging, wherein the packaging contains the non-deaerated mixture; (b) sealing the non-deaerated mixture in the packaging to form a sealed packaging; (c) exposing the non-deaerated mixture in the sealed packaging to a source of ionizing radiation for a time sufficient to initiate (co)polymerization of at least a portion of the at least one free radically (co)polymerizable ethylenically-unsaturated material to form an adhesive composition in the sealed packaging, wherein the source of ionizing radiation is selected from a gamma ray source, an x-ray source, an electron beam source having an emission energy of greater than 300 keV, and combinations thereof, additionally wherein the polymerization takes place essentially non-adiabatically, further wherein at least a portion of the packaging is meltable and mixable with the adhesive composition so as to provide a coatable adhesive composition when the sealed packaging containing the adhesive composition is heated to a temperature sufficient to melt at least a portion of the packaging.