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US4133803A Expired / Lapsed US ⏱️ 0.0 years remaining

Polyoxypropylene polyamine polyamide thermoplastic adhesives

Assignee: Huntsman Corp
•
Filing: 1976-10-20
•
Granted: 1979-01-09
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Expires: 1996-10-20
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Abstract

Abstract A novel thermoplastic adhesive having a melting point between about 20° C to about 180° C. is disclosed which is comprised of a resinous polyamide reaction product of a polyoxypropylene polyamine selected from diamines, triamines, or mixtures thereof having an average molecular weight of about 190 to about 3,000 and an aliphatic or aromatic dicarboxylic acid, ester or anhydride. The thermoplastic adhesive of the invention is prepared by mixing and reacting the polyoxypropylene polyamine and the dicarboxylic acid, ester or anhydride at a molar ratio of from about 0.25:1 to about 4.0:1 at a temperature of from about 175° to about 270° C. for about 1 to about 12 hours. Other components, e.g., a minor amount of polyepoxide resin having an epoxide equivalent weight of about 150 to about 600, a compatible plasticizing agent, filler and the like, may be added to the polyamide reaction product to provide a formulated thermoplastic adhesive having a broad range of hardness, flexibility and compatibility, and capable of bonding together a variety of substrates.

Inventors

  • 👤 Howard P. Klein

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-27 11:33
CPC Classifications
C; C09; C09J; C09J177/00; C08; C08G; C08G69/00; C08G69/40

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 120 words
A thermoplastic adhesive consisting essentially of a polyamide reaction product of a polyoxypropylene polyamine having an average molecular weight of about 190-3000, and having a structural formula as follows: ##STR3## wherein x is an integerr from 1 to 40 or ##STR4## where x, y and z represent integers in the range of about 1 to 15, and the sum of x, y and z is from 3 to about 50; and an aliphatic or aromatic hydrocarbon dicarboxylic acid, ester or anhydride having from 2 to 30 carbon atoms, said polyamide reaction product being prepared by mixing and reacting said polyoxypropylene polyamine and said carboxylic acid, ester or anhydride at a temperature of from about 175° C. to about 270° C.
Claim 2
Dependent Claim 120 words
A thermoplastic adhesive consisting essentially of a polyamide reaction product of a polyoxypropylene polyamine having an average molecular weight of about 190-3000, and having a structural formula as follows: ##STR3## wherein x is an integerr from 1 to 40 or ##STR4## where x, y and z represent integers in the range of about 1 to 15, and the sum of x, y and z is from 3 to about 50; and an aliphatic or aromatic hydrocarbon dicarboxylic acid, ester or anhydride having from 2 to 30 carbon atoms, said polyamide reaction product being prepared by mixing and reacting said polyoxypropylene polyamine and said carboxylic acid, ester or anhydride at a temperature of from about 175° C. to about 270° C.
Claim 3
Dependent Claim 29 words
The thermoplastic adhesive of claim 1 wherein said dicarboxylic acid, ester or anhydride is selected from the group consisting of isophthalic acid, dimethyl terephthalate, terephthalic acid, and phthalic anhydride.
Claim 4
Dependent Claim 71 words
The thermoplastic adhesive of claim 1 wherein said polyamide reaction product is the reaction product of said polyoxypropylene polyamine, said dicarboxylic acid, ester or anhydride, and a polyethylene polyamine of the formula: H.sub.2 N(CH.sub.2 CH.sub.2 NH).sub.x CH.sub.2 CH.sub.2 NH.sub.2 where x is 0 to 4, said polyethylene polyamine being employed in an amount of about 10 to about 50 weight percent based upon the total weight of the polyamide reaction product.
Claim 5
Dependent Claim 12 words
The thermoplastic adhesive of claim 3 wherein said polyethylene polyamine is ethylenediamine.
Claim 6
Dependent Claim 23 words
The thermoplastic adhesive of claim 1 wherein the ratio of said polyoxypropylene polyamine to said dicarboxylic acid, ester or anhydride is about 1:1.
Claim 7
Dependent Claim 15 words
The thermoplastic adhesive compound of claim 1 wherein said compound includes a compatible plasticizing agent.
Claim 8
Dependent Claim 15 words
The thermoplastic adhesive compound of claim 1 wherein said compound further includes a compatible filler.

References Cited (Backward Citations)

US3499853A Cited
US3882090A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1982-01-08 1982-07-10 1983-01-09 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1986-01-08 1986-07-10 1987-01-09 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1990-01-08 1990-07-10 1991-01-09 $7700.00 Window Closed / Lapsed

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