US4740562A
Expired / Lapsed
US
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Method for the surface modification of objects made of polyvinylidene fluoride
Assignee: Alois Gruber GmbH
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Filing: 1986-05-22
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Granted: 1988-04-26
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Expires: 2006-05-22
Abstract
Abstract A method for the surface modification of objects made from polyvinylidene fluoride by dehydrofluorinated of the surface of the objects. The dehydrofluorination is carried out with an etching solution which, in addition to a strong basic compound and a swelling agent and/or solvent for polyvinylidene fluoride, contains an auxiliary agent for the homogenization of the etching solution. The effect of etching is supported by an adhesion promoter. High resistance to shearing and good tough-elasticity in composite structure and laminates is achieved.
Inventors
- 👤 Klaus Menke
- 👤 Klaus Wollmann
- 👤 Gerhard Glink
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:46
CPC Classifications
B; B01; B01D; B01D67/00; B01D67/0081; B01D67/0088; C; C08; C08J; C08J5/00; C08J5/12; C08J5/121; C08J7/00; C08J7/12
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
161 words
Method for the surface modification of objects made of polyvinylidene fluoride, especially for achieving bonding and hydrophilizing properties and for the producton of composite structures, comprising dehydrofluorinating the surface of the objects with an etching solution which contains one or more alkali metal alcoholates and/or alkali metal hydroxides and one or more swelling agent and/or solvent for polyvinylidene fluoride and at least one auxiliary agent for the homogenization and stabilization acting at the same time as a solubilizer for the alcoholate and the hydroxide, the auxiliary agent being a compound of the formula: A--(CR.sub.2)n--S--[(CR.sub.2)n--X--]m(CR.sub.2)n--B wherein A and B, which can be either identical or different, represent an OR or NR 2 group; X is an oxygen atom or an NR group; R residues, which can be either identical or different, represent a hydrogen atom or an alkyl group with 1 to 6 carbon atoms; n is an integer of 1 to 6; and m is an integer of 0 to 50.
Claim 2
Dependent Claim
161 words
Method for the surface modification of objects made of polyvinylidene fluoride, especially for achieving bonding and hydrophilizing properties and for the producton of composite structures, comprising dehydrofluorinating the surface of the objects with an etching solution which contains one or more alkali metal alcoholates and/or alkali metal hydroxides and one or more swelling agent and/or solvent for polyvinylidene fluoride and at least one auxiliary agent for the homogenization and stabilization acting at the same time as a solubilizer for the alcoholate and the hydroxide, the auxiliary agent being a compound of the formula: A--(CR.sub.2)n--S--[(CR.sub.2)n--X--]m(CR.sub.2)n--B wherein A and B, which can be either identical or different, represent an OR or NR 2 group; X is an oxygen atom or an NR group; R residues, which can be either identical or different, represent a hydrogen atom or an alkyl group with 1 to 6 carbon atoms; n is an integer of 1 to 6; and m is an integer of 0 to 50.
Claim 3
Dependent Claim
27 words
Method as claimed in claim 1 wherein the auxiliary agent is a glycol, a polyglycol, an alkyl-amino-substituted polyglycol, a polyethylene oxide, a polypropylene oxide or a polyimine.
Claim 4
Dependent Claim
20 words
Method as claimed in claim 2 wherein the auxiliary agent is diethylene glycol, triethylene glycol or a dialkyl ethylenediamine polyglycol.
Claim 5
Dependent Claim
50 words
Method as claimed in claim 1 wherein the auxiliary aent is a cyclic derivative of said compound obtained by end-to-end connection via formation of crown ethers with a total of 18 ring atoms and 6 oxygen atoms, whereby A and B are one single oxygen atom or a NR group.
Claim 6
Dependent Claim
108 words
Method for the surface modification of objects made of polyvinylidene fluoride, especially for achieving bonding and hydrophilizing properties and for the production of composite structures, comprising dehydrofluorinating the surface of the objects with an etching solution which contains one or more alkali metal alcoholate and/or alkali metal hydroxide and one or more swelling agent and/or solvent for polyvinylidene fluoride and at least one auxiliary agent for the homogenization and stabilization acting at the same time as a solubilizer for the alcoholate and the hydroxide, the auxiliary agent being a cyclic, straight-chain or branched, saturated, if necessary completely or partially fluorinated, polyhydric alcohol having 1 to 12 carbon atoms.
Claim 7
Dependent Claim
108 words
Method for the surface modification of objects made of polyvinylidene fluoride, especially for achieving bonding and hydrophilizing properties and for the production of composite structures, comprising dehydrofluorinating the surface of the objects with an etching solution which contains one or more alkali metal alcoholate and/or alkali metal hydroxide and one or more swelling agent and/or solvent for polyvinylidene fluoride and at least one auxiliary agent for the homogenization and stabilization acting at the same time as a solubilizer for the alcoholate and the hydroxide, the auxiliary agent being a cyclic, straight-chain or branched, saturated, if necessary completely or partially fluorinated, polyhydric alcohol having 1 to 12 carbon atoms.
Claim 8
Dependent Claim
15 words
Method as claimed in claim 5 wherein the auxiliary agent is ethylene glycol and/or glycerin.
Claim 9
Dependent Claim
120 words
Method for the surface modification of objects made of polyvinylidene fluoride, especially for achieving bonding and hydrophilizing properties and for the production of composite structures, comprising dehydrofluorinating the surface of the objects with an etching solution which contains one or more alkali metal alcoholate and/or alkali metal hydroxide and one or more swelling agent and/or solvent for polyvinylidene fluoride and at least one auxiliary agent for the homogenization and stabilization acting at the same time as a solubilizer for the alcoholate and the hydroxide, the auxiliary agent being a cylic, straight-chain or branched, saturated monohydrid alcohol having 3 to 12 carbon atoms, whereby as said one or more swelling agent and/or solvent N-methylpyrrolidone, hexamethyl phosphoric triamide and/or 1,3-dimethyl-3,4,5-tetrahydro-2(1H)-pyrimidinone is used.
Claim 10
Dependent Claim
120 words
Method for the surface modification of objects made of polyvinylidene fluoride, especially for achieving bonding and hydrophilizing properties and for the production of composite structures, comprising dehydrofluorinating the surface of the objects with an etching solution which contains one or more alkali metal alcoholate and/or alkali metal hydroxide and one or more swelling agent and/or solvent for polyvinylidene fluoride and at least one auxiliary agent for the homogenization and stabilization acting at the same time as a solubilizer for the alcoholate and the hydroxide, the auxiliary agent being a cylic, straight-chain or branched, saturated monohydrid alcohol having 3 to 12 carbon atoms, whereby as said one or more swelling agent and/or solvent N-methylpyrrolidone, hexamethyl phosphoric triamide and/or 1,3-dimethyl-3,4,5-tetrahydro-2(1H)-pyrimidinone is used.
Claim 11
Dependent Claim
70 words
Method as claimed in claim 1, 5 or 7 wherein the one or more sodium alcoholate or potassium alcoholate of the general formulas NaOR 1 and KOR 1 is used, wherein R 1 represents a straight-chain or branched hydrocarbon group of the general formula C n H 2n+1 or a cyclic hydrocarbon group of the general formula C n H 2n+1 , n being an integer of 1 to 12.
Claim 12
Dependent Claim
47 words
Method as claimed in claim 1, 5, or 7 wherein the one or more sodium alcoholate or potassium alcoholate of the general formula NaOR 2 and KOR 2 are used, wherein R 2 contains ether, hydroxy and amino groups in a cyclic, straight-chain or branched hydrocarbon chain.
Claim 13
Dependent Claim
24 words
Method as claimed in claim 1, or 5 wherein the one or more swelling agent and/or solvent is N-methylpyrrolidone, hexamethyl phosphoric triamide and/or 1,3-dimethyl-3,4,5-tetrahydro-2(1H)-pyrimidinone.
References Cited (Backward Citations)
US3067078A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-04-26 | 1991-10-26 | 1992-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-26 | 1995-10-26 | 1996-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-26 | 1999-10-26 | 2000-04-26 | $7700.00 | Window Closed / Lapsed |