Process for the adhesion of poly-p-xylylene to substrates by means of phosphoric acid ester primers
AssigneeMontedison S.p.A.
InventorsLeonardo Fiore, Aldo Cicuta
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Abstract
Process for the adhesion of para-xylylene vapors to solid substrates by the use of an unsaturated ester of phosphoric acid of the formula: ##STR1## wherein at least one of the radicals R.sub.1, R.sub.2 and R.sub.3 is hydrogen and at least one of said radicals is: M--O--D-- with M being a methacrylyl or acrylyl radical and D a straight or branched alkylene radical containing 2 to 6 carbon atoms, optionally halogen-substituted.
Claims7
A process for obtaining the adhesion of p-xylylene polymer to organic or inorganic solid substrates which comprises coating the substrate surface with a compound, as an adhesion promoter, having the formula:
- ##STR5## wherein at least one of the radicals R.sub.1, R.sub.2 and R.sub.3 is hydrogen and at least one of said radicals is
- M--O--D--
- M being a methacrylyl or an acrylyl radical and D being a straight or branched alkylene radical containing from 2 to 6 carbon atoms, optionally halogen-substituted, then contacting said coated substrate with vapors of reactive divalent radicals of p-xylylene or derivatives thereof which polymerize after deposition onto the coated substrate surface.
Dependencies are inferred from the claim text.