Patent EP0260661A2 successfully refreshed from Google Patents.
EP0260661A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Composition on the basis of fluorinated polymers in aqueous dispersion, containing alkoxysilanes, and its use for coating metal surfaces
Assignee: Syensqo Specialty Polymers Italy SpA
•
Filing: 1987-09-15
•
Granted: —
•
Expires: 2007-09-15
Abstract
Abstract A composition on the basis of fluorinated polymers in aqueous dispersion, having a basic pH, containing alkoxysilanes and magnesium and/or aluminum as cations complexed with amino- or hydroxy-carboxy acids, acting as bonding agents, which is suitable to form a highly-adhesive layer on metal surfaces, in particular as a primer.
Inventors
- 👤 Alberto Fonte
- 👤 Angelo Tentorio
- 👤 Daria Lenti
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 06:45
CPC Classifications
C; C09; C09D; C09D127/00; C09D127/02; C09D127/12; C09D127/18; C09D5/00; C09D5/002
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
102 words
Composition suitable for forming a coating layer on a metal surface, comprising an aqueous dispersion at a pH comprised within the range of from 8 to 10, of a fluorinated polymer, containing an alkoxysilane soluble in the aqueous phase at pH 8-10, magnesium and/or aluminum in form of cations complexed with a hydroxy- or amino-carboxy acid, the amount of alkoxysilane being comprised within the range of from 0.05 to 0.4 parts by weight per part of fluorinated polymer, and the amount of metal cation being comprised within the range of from 0.001 to 0.005 parts by weight per part of fluorinated polymer.
Claim 2
Dependent Claim
102 words
Composition suitable for forming a coating layer on a metal surface, comprising an aqueous dispersion at a pH comprised within the range of from 8 to 10, of a fluorinated polymer, containing an alkoxysilane soluble in the aqueous phase at pH 8-10, magnesium and/or aluminum in form of cations complexed with a hydroxy- or amino-carboxy acid, the amount of alkoxysilane being comprised within the range of from 0.05 to 0.4 parts by weight per part of fluorinated polymer, and the amount of metal cation being comprised within the range of from 0.001 to 0.005 parts by weight per part of fluorinated polymer.
Claim 3
Dependent Claim
11 words
Composition according to claim 1, wherein the fluorinated polymer is polytetrafluorethylene.
Claim 4
Dependent Claim
27 words
Composition according to claim 1 or 2 wherein the complexing acid for Mg or Al cations is selected from tartaric acid, citric acid, aminoacetic acid, glycolic acid.
Claim 5
Dependent Claim
17 words
Composition according to any one of claims 1 to 3 wherein the alkoxysilane is 3-aminopropyl-triethoxysilane or N-β-(aminoethyl-γ-aminopropyl-trimethoxysilane.
Claim 6
Dependent Claim
25 words
Composition according to any one of claims 1 to 3, wherein the alkoxysilane is selected from γ-glycidoxypropyl-trimethoxysilane and γ-methacryloxypropyl-trimethoxysilane previously partially hydrolysed at pH 3-5.
Claim 7
Dependent Claim
23 words
Use of the composition of any one of claims 1 to 5 for forming a coating layer performing the function of a primer.
Claim 8
Dependent Claim
27 words
Use of the composition of any one of claims 1 to 5 for forming a coating layer on metal surfaces, preferably of iron, aluminum or their alloys.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.