US4536445A
Expired / Lapsed
US
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Elastomer based adhesive compositions
Assignee: Raychem Corp
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Filing: 1984-11-16
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Granted: 1985-08-20
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Expires: 2004-11-16
Abstract
Abstract A substantially solvent-free adhesive composition consists essentially of an elastomer and tackifier, a metal oxide and, optionally, a plasticizer. The elastomer is selected from the group consisting of polar elastomers and unsaturated elastomers which have at least 5 mole percent unsaturation, said elastomer being a non-crystalline elastomer or an elastomer which has a slow rate of crystallization such that after a time period of at least 100 hours has elapsed following subjecting the elastomer to a temperature of 70° C. for 30 minutes, the elastomer has a room temperature Shore A hardness of less than 60. The adhesive compositions can be formed into a shaped article, such as of a tape, film, sheet or tubular sleeve, if desired. The compositions have high adhesive strength for bonding together a variety of substrates. The adhesive is particularly useful with a dimensionally recoverable article, such as a shrinkable sleeve, to bond the recovered sleeve to a substrate such as an electric cable.
Inventors
- 👤 Lester T. Toy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:51
CPC Classifications
C; C09; C09J; C09J171/00; C09J171/02; C09J171/03; B; B29; B29C; B29C61/00; B29C61/003; B29C61/06; B29C61/0608; B29C61/0616; C09J111/00; C09J121/00; C09J7/00; C09J7/10; C09J7/20; C09J7/22; C09J7/30; C09J7/38; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/28; Y10T428/2813; Y10T428/2817; Y10T428/2826; Y10T428/2848; Y10T428/2852; Y10T428/2857; Y10T428/2878; Y10T428/2883; Y10T428/2887; Y10T428/2891
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
195 words
A dimensionally recoverable article comprising: (a) an expanded elastomeric sheet maintained in the expanded state; (b) a restraining means for maintaining said elastomeric sheet in the expanded state; and (c) a layer of adhesive composition on the surface of said elastomeric sheet which is in the direction of dimensional recovery of the sheet, said adhesive composition consisting essentially of: (i) 100 parts of an elastomer selected from the group consisting of polar elastomers and unsaturated elastomers which have at least 5 mole percent unsaturation, said elastomer being a non-crystalline elastomer or an elastomer which has a slow rate of crystallization such that after a time period of at least 100 hours has elapsed following subjecting the elastomer to a temperature of 70° C. for 30 minutes, the elastomer has a room temperature Shore A hardness of less than 60; (ii) 5 to 200 parts of a tackifier; (iii) 0.5-20 parts of an oxide of a metal of Group Ia, IIa, IIb, IVa, or VIIb of the Periodic table; and (iv) 0-100 parts of a plasticizer; said adhesive composition exhibiting a flow of at least 30% at 97° C. under a compressive load of 50 grams.
Claim 2
Dependent Claim
195 words
A dimensionally recoverable article comprising: (a) an expanded elastomeric sheet maintained in the expanded state; (b) a restraining means for maintaining said elastomeric sheet in the expanded state; and (c) a layer of adhesive composition on the surface of said elastomeric sheet which is in the direction of dimensional recovery of the sheet, said adhesive composition consisting essentially of: (i) 100 parts of an elastomer selected from the group consisting of polar elastomers and unsaturated elastomers which have at least 5 mole percent unsaturation, said elastomer being a non-crystalline elastomer or an elastomer which has a slow rate of crystallization such that after a time period of at least 100 hours has elapsed following subjecting the elastomer to a temperature of 70° C. for 30 minutes, the elastomer has a room temperature Shore A hardness of less than 60; (ii) 5 to 200 parts of a tackifier; (iii) 0.5-20 parts of an oxide of a metal of Group Ia, IIa, IIb, IVa, or VIIb of the Periodic table; and (iv) 0-100 parts of a plasticizer; said adhesive composition exhibiting a flow of at least 30% at 97° C. under a compressive load of 50 grams.
Claim 3
Independent Claim
188 words
A method of enclosing an elongate substrate which comprises: (a) positioning a dimensionally recoverable article over at least a part of said substrate; (b) interposing a layer of an adhesive composition between said substrate and said article, said adhesive composition consisting essentially of; (i) 100 parts of an elastomer selected from the group consisting of polar elastomers and unsaturated elastomers which have at least 5 mole percent unsaturation, said elastomer being a non-crystalline elastomer or an elastomer which has a slow rate of crystallization such that after a time period of at least 100 hours has elapsed following subjecting the elastomer to a temperature of 70° C. for 30 minutes, the elastomer has a room temperature Shore A hardness of less than 60; (ii) 5 to 200 parts of a tackifier; (iii) 0.5-20 parts of an oxide of a method of Group Ia, IIa, IIb, IVa or VIIb of the Periodic table; and (iv) 0-100 parts of a plasticizer; said adhesive composition exhibiting a flow of at least 30% at 97° C. under a compressive load of 50 grams; and (c) causing the dimensionally recoverable article to recover.
Claim 4
Independent Claim
188 words
A method of enclosing an elongate substrate which comprises: (a) positioning a dimensionally recoverable article over at least a part of said substrate; (b) interposing a layer of an adhesive composition between said substrate and said article, said adhesive composition consisting essentially of; (i) 100 parts of an elastomer selected from the group consisting of polar elastomers and unsaturated elastomers which have at least 5 mole percent unsaturation, said elastomer being a non-crystalline elastomer or an elastomer which has a slow rate of crystallization such that after a time period of at least 100 hours has elapsed following subjecting the elastomer to a temperature of 70° C. for 30 minutes, the elastomer has a room temperature Shore A hardness of less than 60; (ii) 5 to 200 parts of a tackifier; (iii) 0.5-20 parts of an oxide of a method of Group Ia, IIa, IIb, IVa or VIIb of the Periodic table; and (iv) 0-100 parts of a plasticizer; said adhesive composition exhibiting a flow of at least 30% at 97° C. under a compressive load of 50 grams; and (c) causing the dimensionally recoverable article to recover.
Claim 5
Dependent Claim
14 words
An article in accordance with claim 1, wherein said elastomer is slow crystallizing neoprene.
Claim 6
Dependent Claim
16 words
An article in accordance with claim 1, wherein said adhesive composition is an epichlorohydrin/ethylene oxide copolymer.
Claim 7
Dependent Claim
35 words
An article in accordance with claim 1, wherein said tackifier is present in an amount in the range of from about 30 to about 100 parts by weight per 100 parts by weight of elastomer.
Claim 8
Dependent Claim
42 words
An article in accordance with claim 1, wherein said tackifier is selected from the group consisting of rosin, modified rosin, rosin derivatives such as rosin salts or rosin esters, hydrocarbon resins, polymerized petroleum hydrocarbons, polyterpenes, phenolic resins, terpene phemolic resin, comarone-indene resin.
Claim 9
Dependent Claim
14 words
An article in accordance with claim 5, wherein said tackifier is a phenolic resin.
Claim 10
Dependent Claim
14 words
An article in accordance with claim 5, wherein said tackifier is a terpene-phenolic resin.
Claim 11
Dependent Claim
14 words
An article in accordance with claim 5, wherein said tackifier is a rosin derivative.
Claim 12
Dependent Claim
37 words
An article in accordance with claim 1, wherein said metal oxide is present in an amount in the range of from about 0.5 to about 10 parts by weight per 100 parts by weight of the elastomer.
Claim 13
Dependent Claim
25 words
An article in accordance with claim 1, wherein said metal oxide is selected from the group consisting of the oxides of zinc magnesium and lead.
Claim 14
Dependent Claim
14 words
An article in accordance with claim 1, wherein said metal oxide is zinc oxide.
Claim 15
Dependent Claim
14 words
An article in accordance with claim 1, wherein said metal oxide is magnesium oxide.
Claim 16
Dependent Claim
35 words
An article in accordance with claim 1, wherein said plasticizer is present in an amount in the range of from about 10 to about 80 parts by weight per 100 parts by weight of elastomer.
Claim 17
Dependent Claim
35 words
An article in accordance with claim 1, wherein said plasticizer is present in an amount in the range of from about 10 to about 80 parts by weight per 100 parts by weight of elastomer.
Claim 18
Dependent Claim
16 words
An article in accordance with claim 1, wherein said plasticizer is a low molecular weight neoprene.
Claim 19
Dependent Claim
86 words
An article in accordance with claim 1, wherein said layer of adhesive composition comprises a composition consisting essentially of 100 parts by weight of slow crystallizing neoprene, 30 to 100 parts by weight of a terpene phenolic tackifier, 0.5 to 10 parts by weight of metal oxide selected from the group consisting of zinc oxide, magnesium oxide, and mixtures thereof and 10 to 80 parts by weight of a plasticizer selected from the group consisting of low molecular weight neoprene, chlorinated paraffin wax and mixtures thereof.
References Cited (Backward Citations)
US2295030A
Cited
US2407038A
Cited
US2442083A
Cited
US2771936A
Cited
US3033724A
Cited
US3086242A
Cited
US3258388A
Cited
US3455336A
Cited
US3574792A
Cited
US3616006A
Cited
US3674735A
Cited
US3708379A
Cited
US3817922A
Cited
US3925271A
Cited
US4207364A
Cited
US4070746A
Cited
US4135553A
Cited
GB1556677A
Cited
GB1532294A
Cited
US4378463A
Cited
US4179320A
Cited
US4287012A
Cited
US4268334A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-08-19 | 1989-02-18 | 1989-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-19 | 1993-02-18 | 1993-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-19 | 1997-02-18 | 1997-08-20 | $7700.00 | Window Closed / Lapsed |