Patent US4181775A successfully refreshed from Google Patents.
US4181775A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adhesive
Assignee: Raychem Corp
•
Filing: 1977-05-19
•
Granted: 1980-01-01
•
Expires: 1997-05-19
Abstract
Abstract Hot melt adhesives which are especially suitable for use with heat-recoverable plastics articles such as heat-shrinkable sleeves, wrap-around sleeves and end-caps are based on a combination of selected polyamides of relatively low molecular weight and relatively high amine equivalent, especially those based on dimer acids, and compatible waxes, especially low molecular weight paraffin and polyolefin waxes. The adhesive compositions advantageously comprise a tackifier, especially an aromatic tackifier, and preferred compositions include a minor amount of a rubber modifying agent to improve their low temperature flexibility and high temperature stability.
Inventors
- 👤 Nicholas T. Corke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:36
CPC Classifications
C; C09; C09J; C09J177/00; C08; C08L; C08L2666/00; C08L2666/02; Y; Y10; Y10S; Y10S174/00; Y10S174/08; Y10T; Y10T428/00; Y10T428/13; Y10T428/1328; Y10T428/28; Y10T428/2813; Y10T428/2817; Y10T428/2822; Y10T428/2852; Y10T428/2878
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
92 words
An adhesive composition consisting essentially of (a) 100 parts by weight of a polyamide having a number average molecular weight of from 2000 to 10,000; a softening point of from 90° C. to 150° C. and an amine equivalent of from 70 to 400; and (b) from 5 to 50 parts by weight of a wax having a melting point in the range of 90° C. to 140° C. and a solid to liquid transition which takes place over a temperature range of not more than 30° C. as measured by DSC.
Claim 2
Dependent Claim
92 words
An adhesive composition consisting essentially of (a) 100 parts by weight of a polyamide having a number average molecular weight of from 2000 to 10,000; a softening point of from 90° C. to 150° C. and an amine equivalent of from 70 to 400; and (b) from 5 to 50 parts by weight of a wax having a melting point in the range of 90° C. to 140° C. and a solid to liquid transition which takes place over a temperature range of not more than 30° C. as measured by DSC.
Claim 3
Dependent Claim
20 words
An adhesive composition according to claim 1, which also contains from 5 to 40 parts by weight of a tackifier.
Claim 4
Dependent Claim
14 words
An adhesive composition according to claim 2, wherein the tackifier is an aromatic tackifier.
Claim 5
Dependent Claim
15 words
An adhesive composition according to claim 2, wherein the tackifier is a terpene phenol resin.
Claim 6
Dependent Claim
28 words
An adhesive composition according to claim 1, which additionally contains up to 20% by weight, based on the weight of components (a) and (b) together, of a rubber.
Claim 7
Dependent Claim
14 words
An adhesive composition according to claim 5, wherein the rubber is an ethylene/propylene rubber.
Claim 8
Dependent Claim
17 words
An adhesive composition according to claim 5, wherein the rubber is a liquid or solid nitrile rubber.
Claim 9
Dependent Claim
19 words
An adhesive composition according to claim 1, wherein the polyamide has an amine equivalent of from 90 to 200.
Claim 10
Dependent Claim
19 words
An adhesive composition according to claim 1, wherein the polyamide has a molecular weight of from 3000 to 7000.
Claim 11
Dependent Claim
17 words
An adhesive composition according to claim 1, wherein the polyamide is predominantly based on a dimer acid.
Claim 12
Dependent Claim
28 words
An adhesive composition according to claim 1, wherein the wax is a natural or synthetic hydrocarbon or polyolefin wax having a molecular weight of from 300 to 10,000.
Claim 13
Dependent Claim
23 words
An adhesive composition according to claim 1, wherein the wax is a polyethylene wax having a molecular weight of from 1,000 to 5,000.
Claim 14
Dependent Claim
20 words
An adhesive composition according to claim 1, which additionally contains from 5 to 40 parts by weight of a plasticiser.
Claim 15
Dependent Claim
118 words
An adhesive composition consisting essentially of (a) 100 parts by weight of a polyamide based predominately on a dimer acid and having a molecular weight of from 3000 to 7000, an amine equivalent of from 90 to 200 and a softening point of from 90° C. to 150° C.; (b) from 5 to 20 parts by weight of a polyethylene based wax having a molecular weight not greater than 6000, said wax having a melting point in the range of 90° C. to 140° C. and a solid to liquid transition over a temperature range of not more than 30° C. as measured by DSC; and (c) from 5 to 20 parts by weight of an aromatic tackifier.
Claim 16
Dependent Claim
118 words
An adhesive composition consisting essentially of (a) 100 parts by weight of a polyamide based predominately on a dimer acid and having a molecular weight of from 3000 to 7000, an amine equivalent of from 90 to 200 and a softening point of from 90° C. to 150° C.; (b) from 5 to 20 parts by weight of a polyethylene based wax having a molecular weight not greater than 6000, said wax having a melting point in the range of 90° C. to 140° C. and a solid to liquid transition over a temperature range of not more than 30° C. as measured by DSC; and (c) from 5 to 20 parts by weight of an aromatic tackifier.
Claim 17
Dependent Claim
22 words
An adhesive composition according to claim 14, which additionally contains up to 20% by weight of a liquid or solid rubber modifier.
Claim 18
Dependent Claim
104 words
A heat shrinkable polymeric article at least one principal surface of which is coated with an adhesive composition consisting essentially of (a) 100 parts by weight of a polyamide having a number average molecular weight of from 2,000 to 10,000; a softening point of from 90° C. to 150° C. and an amine equivalent of from 70 to 400; and (b) from 5 to 50 parts by weight of a wax having a melting point in the range of 90° C. to 140° C. and a solid to liquid transition over a temperature range of not more than 30° C. as measured by DSC.
Claim 19
Dependent Claim
104 words
A heat shrinkable polymeric article at least one principal surface of which is coated with an adhesive composition consisting essentially of (a) 100 parts by weight of a polyamide having a number average molecular weight of from 2,000 to 10,000; a softening point of from 90° C. to 150° C. and an amine equivalent of from 70 to 400; and (b) from 5 to 50 parts by weight of a wax having a melting point in the range of 90° C. to 140° C. and a solid to liquid transition over a temperature range of not more than 30° C. as measured by DSC.
Claim 20
Dependent Claim
108 words
A heat shrinkable polymeric article at least one principal surface of which is coated with an adhesive composition consisting essentially of (a) 100 parts by weight of a polyamide based predominately on a dimer acid and having a molecular weight of from 3,000 to 7,000, an amine equivalent of from 90 to 200 and a softening point of from 90° C. to 150° C.; (b) from 5 to 20 parts by weight of a wax having a melting point in the range of 90° C. to 140° C. and a solid to liquid transition over a temperature range of not more than 30° C. as measured by DSC.
Claim 21
Dependent Claim
108 words
A heat shrinkable polymeric article at least one principal surface of which is coated with an adhesive composition consisting essentially of (a) 100 parts by weight of a polyamide based predominately on a dimer acid and having a molecular weight of from 3,000 to 7,000, an amine equivalent of from 90 to 200 and a softening point of from 90° C. to 150° C.; (b) from 5 to 20 parts by weight of a wax having a melting point in the range of 90° C. to 140° C. and a solid to liquid transition over a temperature range of not more than 30° C. as measured by DSC.
Claim 22
Dependent Claim
26 words
A heat-shrinkable polymeric article according to claim 17, wherein the adhesive composition additionally contains up to 20% by weight of a liquid or solid rubber modifier.
Claim 23
Dependent Claim
13 words
A heat-shrinkable polymeric article according to claim 17, which is a heat-shrinkable sleeve.
Claim 24
Dependent Claim
14 words
A heat-shrinkable polymeric article according to claim 17, which is a heat-shrinkable wrap-around sleeve.
References Cited (Backward Citations)
DE1719128U
Cited
GB1003709A
Cited
US3249629A
Cited
US3444026A
Cited
DE1594229A1
Cited
GB1178911A
Cited
US3449423A
Cited
DE2118796A1
Cited
US3792002A
Cited
GB1440810A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-12-31 | 1983-07-02 | 1984-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-31 | 1987-07-02 | 1988-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-31 | 1991-07-02 | 1992-01-01 | $7700.00 | Window Closed / Lapsed |