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EP0311292A2
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EP
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Method for welding polymer structures containing amide linkages
Assignee: SU "KLIMENT OHRIDSKI"
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Filing: 1988-09-28
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Granted: —
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Expires: 2008-09-28
Abstract
Abstract Laminates and other composite polymer bodies are produced by a welding procedure wherein polymer bodies containing amide linking groups are wetted with a paraformaldehyde/methanol solution and the wetted bodies are pressed together at from 5 to 40°C under pressing conditions such that good contact between the surface is achieved.
Inventors
- 👤 Nadka Vassileva Avramova
- 👤 Stoyko Hristov Fakirov
- 👤 Jerold Marvin Schultz
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 07:44
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/12; C08J5/00; C08J5/12; C08J2377/00; Y; Y10; Y10S; Y10S428/00; Y10S428/91; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31536; Y10T428/31725; Y10T428/31728; Y10T428/31768
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
50 words
A method for welding bodies formed of polymers containing amide linking groups, characterised in that the polymer bodies are wetted with a paraformaldehyde/ methanol methoxy-methylating solution and then pressing the wetted bodies together at from 5 to 40°C under pressing conditions such that good contact between the surface is achieved.
Claim 2
Independent Claim
50 words
A method for welding bodies formed of polymers containing amide linking groups, characterised in that the polymer bodies are wetted with a paraformaldehyde/ methanol methoxy-methylating solution and then pressing the wetted bodies together at from 5 to 40°C under pressing conditions such that good contact between the surface is achieved.
Claim 3
Dependent Claim
16 words
A method as claimed in claim 1, wherein the polymer is a polyamide, protein or polypeptide.
Claim 4
Independent Claim
21 words
A method as claimed in any preceding claim, wherein said solution has a paraformaldehyde to methanol ratio from 0.2:1 to 1:5.
Claim 5
Independent Claim
18 words
A method as claimed in any preceding claim, wherein said solution contains a catalyst for the methoxy methylation.
Claim 6
Dependent Claim
13 words
A method as claimed in claim 4, wherein the catalyst is oxalic acid.
Claim 7
Independent Claim
16 words
A method as claimed in any preceding claim, wherein said solution contains trace amounts of alkali.
Claim 8
Independent Claim
22 words
A method as claimed in any preceding claim, wherein said bodies are polymer foils which are laminated together under said pressing conditions.
Claim 9
Dependent Claim
25 words
A method as claimed in claim 7, wherein the wetted bodies are pressed in a drill press vice for from 30 minutes to 36 hours.
Claim 10
Dependent Claim
26 words
A method as claimed in claim 8, wherein the wetted bnodies are pressed in the drill press at a pressure of 0.05 MPa to 5 MPa.
References Cited (Backward Citations)
No citation records indexed.
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