US5500293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adhesive compositions with improved plasticizer resistance
Assignee: 3M Co
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Filing: 1993-02-05
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Granted: 1996-03-19
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Expires: 2013-02-05
Abstract
Abstract The invention provides an adhesive composition suitable for use in an insulating tape having improved plasticizer resistance, comprising from about 13 to about 42 of a polyisoprene homopolymer, from about 13 to about 42 of a styrene-isoprene-styrene copolymer, from about 25 to about 55 of an aliphatic tackifying agent containing from about 4 to about 6 carbon atoms, and from about 2 to about 20 of an end block reinforcing resin.
Inventors
- 👤 Felix P. Lau
- 👤 Timothy D. Bredahl
- 👤 George E. Cox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:57
CPC Classifications
C; C09; C09J; C09J109/00; C09J153/00; C09J153/02; C08; C08L; C08L2666/00; C08L2666/02; C08L2666/04; C08L2666/06; C08L2666/24; C08L2666/28; Y; Y10; Y10T; Y10T428/00; Y10T428/28; Y10T428/2852; Y10T428/2878; Y10T428/2883; Y10T428/2887; Y10T428/2896
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
125 words
An adhesive compositions suitable for use in an insulating tape consisting essentially of: a) from about 13% to about 42% by weight of a polyisoprene homopolymer, b) from about 13% to about 42% by weight of a styrene-isoprene-styrene block copolymer, c) from about 25% to about 55% by weight of a solid aliphatic tackifying agent containing from about 4 to about 6 carbon atoms, and d) from about 2% to about 20% by weight of a reinforcing resin consisting of an aromatic, essentially hydrocarbon resin selected from the group consisting of low molecular weight polymers containing styrene, alpha-methyl styrene, para-methylstyrene, copolymers of styrene and alpha-methylstyrene, copolymers of styrene and para-methylstyrene, and copolymers of alpha-methyl styrene and para-methyl styrene wherein said adhesive exhibits improved plasticizer resistance.
Claim 2
Dependent Claim
125 words
An adhesive compositions suitable for use in an insulating tape consisting essentially of: a) from about 13% to about 42% by weight of a polyisoprene homopolymer, b) from about 13% to about 42% by weight of a styrene-isoprene-styrene block copolymer, c) from about 25% to about 55% by weight of a solid aliphatic tackifying agent containing from about 4 to about 6 carbon atoms, and d) from about 2% to about 20% by weight of a reinforcing resin consisting of an aromatic, essentially hydrocarbon resin selected from the group consisting of low molecular weight polymers containing styrene, alpha-methyl styrene, para-methylstyrene, copolymers of styrene and alpha-methylstyrene, copolymers of styrene and para-methylstyrene, and copolymers of alpha-methyl styrene and para-methyl styrene wherein said adhesive exhibits improved plasticizer resistance.
Claim 3
Dependent Claim
102 words
An adhesive composition suitable for use in an insulating tape according to claim 1 consisting essentially of: a) from about 20 % to about 35% by weight of a polyisoprene homopolymer, b) from about 20% to about 35% by weight of a styrene-isoprene-styrene copolymer, c) from about 30% to about 45% by weight of an aliphatic tackifying agent containing from about 4 to about 6 carbon atoms, d) from about 2% to about 20% by weight of an end block reinforcing resin, and e) from about 0.13 to about 2% by weight of an antioxidant, wherein said adhesive exhibits improved plasticizer resistance.
Claim 4
Dependent Claim
30 words
An adhesive composition suitable for use in an insulating tape according to claim 2 wherein said antioxidant is selected from the group consisting of 2,5 di(tert-amyl)hydroquinone, and tertiary butyl hydroxytoluene.
Claim 5
Dependent Claim
53 words
An adhesive composition suitable for use in an insulating tape according to claim 1 wherein said tackifier is selected from the group consisting of rosin esters, hydrogenated rosin esters, polyterpene resins, polymerized hydrocarbon resins containing from about 4 to about 6 carbon atoms, resins from polymerized C9 hydrocarbon streams, and hydrogenated compounds thereof.
Claim 6
Dependent Claim
30 words
An adhesive composition suitable for use in an insulating tape according to claim 4 wherein said tackifier is present in an amount of from 30% to about 45% by weight.
Claim 7
Dependent Claim
20 words
An insulating tape comprising a backing containing on at least one major surface thereof an adhesive according to claim 1.
Claim 8
Dependent Claim
20 words
An insulating tape comprising a backing containing on at least one major surface thereof an adhesive according to claim 2.
Claim 9
Dependent Claim
13 words
An insulating tape according to claim 6 wherein said backing contains poly(vinyl chloride).
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-03-19 | 1999-09-18 | 2000-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-03-19 | 2003-09-18 | 2004-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-03-19 | 2007-09-18 | 2008-03-19 | $7700.00 | Window Closed / Lapsed |