US4217256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyamide adhesive for bonding fabrics
Assignee: Henkel Corp
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Filing: 1978-08-31
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Granted: 1980-08-12
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Expires: 1998-08-31
Abstract
Abstract There is disclosed a polyamide adhesive for bonding fabrics, particularly fusible interliners for fabrics, which are cleanable by laundering and/or dry cleaning. The polyamide adhesive is a terpolyamide of caprolactam and hexamethylene diamine with a mixture of polymeric fat acids and an aliphatic co-dicarboxylic acid having 20-22 carbon atoms.
Inventors
- 👤 Dwight E. Peerman
- 👤 H. Gordon Kanten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:44
CPC Classifications
C; C09; C09J; C09J177/00; C09J177/06; C09J177/08; C08; C08G; C08G69/00; C08G69/02; C08G69/36
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
176 words
A polyamide adhesive adapted for bonding of fusible interliners for fabrics which are cleanable comprising a polymeric fat acid terpolyamide having a melt index at 175° C. of at least 30 and a melt viscosity of not more than 125 poises at 220° C. and a tensile secant modulus not more than about 45,000, said terpolyamide being the thermal amidification product at a temperature of about 100°-300° C. for a time sufficient to effect amidification of (a) caprolactam, amino-caproic acid or mixtures thereof, (b) hexamethylene diamine and (c) a mixture of a polymeric fat acid and an aliphatic straight chain co-dicarboxylic acid having 10-12 carbon atoms wherein substantially equal amounts of amine and carboxyl are employed to provide a terpolyamide product wherein the caprolactam is present in an amount of 25-30% by weight, the polyamide of said hexamethylene diamine and said polymeric fat acid is present in an amount of 45-55% by weight and the polyamide of said hexamethylene diamine and said co-dicarboxylic acid is present in an amount of 20-25% by weight of the terpolyamide.
Claim 2
Dependent Claim
176 words
A polyamide adhesive adapted for bonding of fusible interliners for fabrics which are cleanable comprising a polymeric fat acid terpolyamide having a melt index at 175° C. of at least 30 and a melt viscosity of not more than 125 poises at 220° C. and a tensile secant modulus not more than about 45,000, said terpolyamide being the thermal amidification product at a temperature of about 100°-300° C. for a time sufficient to effect amidification of (a) caprolactam, amino-caproic acid or mixtures thereof, (b) hexamethylene diamine and (c) a mixture of a polymeric fat acid and an aliphatic straight chain co-dicarboxylic acid having 10-12 carbon atoms wherein substantially equal amounts of amine and carboxyl are employed to provide a terpolyamide product wherein the caprolactam is present in an amount of 25-30% by weight, the polyamide of said hexamethylene diamine and said polymeric fat acid is present in an amount of 45-55% by weight and the polyamide of said hexamethylene diamine and said co-dicarboxylic acid is present in an amount of 20-25% by weight of the terpolyamide.
Claim 3
Dependent Claim
31 words
The polyamide adhesive as defined in claim 1 wherein said melt index is in the range of about 30-250 and said melt viscosity is in the range of about 30-125 poise.
Claim 4
Dependent Claim
35 words
A polyamide adhesive as defined in claim 2 wherein said polyamide is prepared from a polymeric fat acid containing monomeric monocarboxylic acid in an amount to provide a Kv value in the range of 6-14.
Claim 5
Dependent Claim
39 words
A polyamide adhesive as defined in claim 3 wherein said polymeric fat acid after addition of any of said monocarboxylic acid to adjust said Kv value within said range contains at least about 80% dimeric fat acid by weight.
Claim 6
Dependent Claim
25 words
A polyamide adhesive as defined in claim 2 wherein said polymeric fat acid is obtained by polymerization of 16-22 carbon atom ethylenically unsaturated monocarboxylic acids.
Claim 7
Dependent Claim
25 words
A polyamide adhesive as defined in claim 2 wherein said polymeric fat acid is obtained by polymerization of 18 carbon atom ethylenically unsaturated monocarboxylic acids.
Claim 8
Dependent Claim
23 words
A polyamide adhesive as defined in claim 6 wherein said 18 carbon atom acids are the mixture of acids obtained from tall oil.
Claim 9
Dependent Claim
39 words
A polyamide adhesive as defined in claim 7 wherein said polymeric fat acids obtained from said tall oil are hydrogenated and distilled to provide a polymeric fat acid having a dimeric fat acid content greater than 90% by weight.
Claim 10
Dependent Claim
15 words
A polyamide adhesive as defined in claim 1 wherein said co-dicarboxylic acid is sebacic acid.
Claim 11
Dependent Claim
15 words
A polyamide adhesive as defined in claim 1 wherein said co-dicarboxylic acid is dodecanedioic acid.
Claim 12
Dependent Claim
28 words
In a method of adhering a fusible non-woven interliner to a fabric with a polyamide adhesive the improvement wherein said adhesive is the polyamide defined in claim 1.
Claim 13
Dependent Claim
29 words
A method as defined in claim 11 wherein said interliner is bonded to a woven fabric wherein said polyamide adhesive has been deposited in the form of a web.
Claim 14
Dependent Claim
13 words
A method as defined in claim 12 wherein said fabric is cotton broadcloth.
Claim 15
Dependent Claim
29 words
A method as defined in claim 13 wherein said interliner is bonded to said fabric by the application of heat in a bonding temperature not less than 118° C.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-08-12 | 1984-02-11 | 1984-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-08-12 | 1988-02-11 | 1988-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-08-12 | 1992-02-11 | 1992-08-12 | $7700.00 | Window Closed / Lapsed |