Patent US4272936A successfully refreshed from Google Patents.
EP0287271A2
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EP
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Heat sealing of polyamides
Assignee: CESARONI, ANTHONY JOSEPH
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Filing: 1988-04-07
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Granted: —
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Expires: 2008-04-07
Abstract
Abstract An admixture of benzyl alcohol and hydroxy benzene is disclosed, for use in the bonding together of polyamide articles. In embodiments, the mixture comprises 5 to 50% by weight of benzyl alcohol, 20 to 90% by weight of phenol and 5 to 30% by weight of polyamide. In other embodiments, the mixture comprises 20 to 60% by weight of benzyl alcohol, 20 to 60% by weight of ortho-dihydroxy benzene and 20 to 60% by weight of a lower alcohol having one to four carbon atoms. The mixture may be applied to a polyamide article, which may then be contacted with a second polyamide article and heated to effect bonding. In embodiments, the mixture may be applied in a pattern e.g. to polyamide in the form of film, so that a polyamide structure having a similar pattern of bonds may be obtained. For example, the composition may be used to bond film or sheet together so as to form fluid flow passages therebetween e.g. as in a heat exchanger.
Inventors
- 👤 Anthony Joseph Cesaroni
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 13:30
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/09; C08J3/091; C08J3/095; C08J5/00; C08J5/12; C08J5/122; C08K; C08K5/00; C08K5/04; C08K5/05; C08K5/13; F; F28; F28F; F28F21/00; F28F21/06; F28F21/065; C08J2377/00; F28F2275/00; F28F2275/02; F28F2275/025; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31725; Y10T428/31728; Y10T428/31732
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
93 words
An admixture formed from benzyl alcohol and a hydroxy benzene, said admixtures being selected from the group consisting of: (i) a homogeneous admixture comprising: (a) 5 to 50% by weight of benzyl alcohol; (b) 20 to 90% by weight of phenol; and (c) 5 to 30% by weight of a polyamide; and (ii) a homogeneous admixture comprising: (a) 20 to 60% by weight of benzyl alcohol; (b) 20 to 60% by weight of ortho-dihydroxy benzene; and (c) 20 to 60% by weight of a lower alcohol having from one to four carbon atoms.
Claim 2
Dependent Claim
93 words
An admixture formed from benzyl alcohol and a hydroxy benzene, said admixtures being selected from the group consisting of: (i) a homogeneous admixture comprising: (a) 5 to 50% by weight of benzyl alcohol; (b) 20 to 90% by weight of phenol; and (c) 5 to 30% by weight of a polyamide; and (ii) a homogeneous admixture comprising: (a) 20 to 60% by weight of benzyl alcohol; (b) 20 to 60% by weight of ortho-dihydroxy benzene; and (c) 20 to 60% by weight of a lower alcohol having from one to four carbon atoms.
Claim 3
Dependent Claim
39 words
The admixture of Claim 1 in which the admixture consists essentially of: (a) 5 to 50% by weight of benzyl alcohol; (b) 20 to 90% by weight of phenol; and (c) 5 to 30% by weight of a polyamide.
Claim 4
Dependent Claim
48 words
The admixture of Claim 1 in which the admixture consists essentially of: (a) 20 to 60% by weight of benzyl alcohol; (b) 20 to 60% by weight of ortho-dihydroxy benzene; and (c) 20 to 60% by weight of a lower alcohol having from one to four carbon atoms.
Claim 5
Dependent Claim
13 words
The admixture of Claim 2 in which the polyamide is an aliphatic polyamide.
Claim 6
Dependent Claim
40 words
The admixture of Claim 4 in which the amount of benzyl alcohol is 10 to 40% by weight, the amount of phenol is 40 to 80% by weight and the amount of aliphatic polyamide is 10 to 20% by weight.
Claim 7
Dependent Claim
15 words
The admixture of Claim 4 or Claim 5 in which the polyamide is polyhexamethylene adipamide.
Claim 8
Dependent Claim
40 words
The admixture of Claim 3 in which the amount of benzyl alcohol is 25 to 50% by weight, the amount of ortho-hydroxy benzene is 25 to 50% by weight and the amount of methanol is 25 to 50% by weight.
Claim 9
Dependent Claim
128 words
A process for bonding a first polyamide article to a second polyamide article, comprising: (A) applying an admixture formed from benzyl alcohol and a hydroxy benzene to at least one of said polyamide articles, said admixture being selected from the group consisting of: (i) a homogeneous admixture comprising: (a) 5 to 50% by weight of benzyl alcohol; (b) 20 to 90% by weight of phenol; and (c) 5 to 30% by weight of a polyamide; and (ii) a homogeneous admixture comprising: (a) 20 to 60% by weight of benzyl alcohol; (b) 20 to 60% by weight of ortho-dihydroxy benzene; and (c) 20 to 60% by weight of a lower alcohol having from one to four carbon atoms; and (B) bringing said first and second polyamide articles into contact.
Claim 10
Dependent Claim
128 words
A process for bonding a first polyamide article to a second polyamide article, comprising: (A) applying an admixture formed from benzyl alcohol and a hydroxy benzene to at least one of said polyamide articles, said admixture being selected from the group consisting of: (i) a homogeneous admixture comprising: (a) 5 to 50% by weight of benzyl alcohol; (b) 20 to 90% by weight of phenol; and (c) 5 to 30% by weight of a polyamide; and (ii) a homogeneous admixture comprising: (a) 20 to 60% by weight of benzyl alcohol; (b) 20 to 60% by weight of ortho-dihydroxy benzene; and (c) 20 to 60% by weight of a lower alcohol having from one to four carbon atoms; and (B) bringing said first and second polyamide articles into contact.
Claim 11
Dependent Claim
39 words
The process of Claim 8 in which the admixture consists essentially of: (a) 5 to 50% by weight of benzyl alcohol; (b) 20 to 90% by weight of phenol; and (c) 5 to 30% by weight of a polyamide.
Claim 12
Dependent Claim
48 words
The process of Claim 8 in which the admixture consists essentially of: (a) 20 to 60% by weight of benzyl alcohol; (b) 20 to 60% by weight of ortho-dihydroxy benzene; and (c) 20 to 60% by weight of a lower alcohol having from one to four carbon atoms.
Claim 13
Dependent Claim
13 words
The process of Claim 9 in which the polyamide is an aliphatic polyamide.
Claim 14
Dependent Claim
40 words
The process of Claim 11 in which the amount of benzyl alcohol is 10 to 40% by weight, the amount of phenol is 40 to 80% by weight and the amount of aliphatic polyamide is 10 to 20% by weight.
Claim 15
Dependent Claim
15 words
The process of Claim 11 or Claim 12 in which the polyamide is polyhexamethylene adipamide.
Claim 16
Dependent Claim
40 words
The process of Claim 10 in which the amount of benzyl alcohol is 25 to 50% by weight, the amount of ortho-hydroxy benzene is 25 to 50% by weight and the amount of methanol is 25 to 50% by weight.
Claim 17
Dependent Claim
52 words
The process of any of Claims 8 to 14, comprising the additional step of (C) applying heat to said articles to effect bonding of the first polyamide article to the second polyamide article, the amount of heat being insufficient to raise the temperature to more than the melting point of the polyamide.
Claim 18
Dependent Claim
40 words
The process of Claim 15 in which the amount of heat applied does not raise the temperature of the first or second polyamide article above a temperature that is 50°C below the melting point of the polyamides of such articles.
Claim 19
Dependent Claim
25 words
The process of Claim 15 in which amount of heat applied does not raise the temperature of the first or second polyamide article above 195°C.
Claim 20
Dependent Claim
21 words
The process of any of Claims 8 to 17in which the polyamide articles are in the form of film or sheet.
References Cited (Backward Citations)
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