US4784881A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the adhesion of poly-p-xylylene to substrates by means of phosphoric acid ester primers
Assignee: Montedison SpA
•
Filing: 1986-12-12
•
Granted: 1988-11-15
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Expires: 2006-12-12
Abstract
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 1 , R 2 and R 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.
Inventors
- 👤 Leonardo Fiore
- 👤 Aldo Cicuta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:49
CPC Classifications
B; B05; B05D; B05D1/00; B05D1/60; C; C08; C08G; C08G61/00; C08G61/02; C08G61/025; C08J; C08J7/00; C08J7/04; C08J7/0427; C08J7/043; H; H05; H05K; H05K3/00; H05K3/38; H05K3/381; C08G2261/00; C08G2261/30; C08G2261/34; C08G2261/342; C08G2261/3424; C08J2363/00; C08J2465/00; H05K3/22; H05K3/28; H05K3/284
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
109 words
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 1 , R 2 and R 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.
Claim 2
Dependent Claim
109 words
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 1 , R 2 and R 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.
Claim 3
Dependent Claim
25 words
The process according to claim 1, wherein the substrate surface is treated with a solution of a phosphoric acid unsaturated ester having the formula (I).
Claim 4
Dependent Claim
38 words
The process according to claim 2, wherein the solvent for the phosphoric acid unsaturated ester having the formula (I) is selected from water, an alcohol having a low number of carbon atoms, a halogenated hydrocarbon, and water-alcohol mixtures.
Claim 5
Dependent Claim
27 words
The process according to claim 2 or 3, wherein the solution concentration ranges from 0.05 to 50% by weight, and preferably from 0.1 to 5% by weight.
Claim 6
Dependent Claim
20 words
The process according to claim 1 or 2, wherein the phosphoric acid unsaturated ester of formula (I) is methacrylethyl phosphate.
Claim 7
Dependent Claim
66 words
The process according to claim 1 or 2, wherein the vapors of divalent radicals of p.xylylene or derivatives thereof are obtained by pyrolysis, at a temperature higher than 400° C., of (2,2)-paracyclophane or derivatives thereof of formula: ##STR6## wherein X may be a halogen, an alkyl radical, an aralkyl radical, or a halo-aralkyl radical, and m and n may be an integer from 0 to 4.
Claim 8
Dependent Claim
10 words
A process according to claim 6, wherein X is chlorine.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-11-15 | 1992-05-16 | 1992-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-15 | 1996-05-16 | 1996-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-15 | 2000-05-16 | 2000-11-15 | $7700.00 | Window Closed / Lapsed |