US4853432A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure sensitive adhesives containing light color, low softening point hydrocarbon resins
Assignee: ExxonMobil Chemical Patents Inc
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Filing: 1987-06-30
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Granted: 1989-08-01
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Expires: 2007-06-30
Abstract
Abstract An adhesive comprising a copolymer and an optionally hydrogenated light color petroleum hydrocarbon resin including an aromatic hydrocarbon component useful for tackifying block copolymers is described which has a softening point of about 0 DEG C. to about 40 DEG C., a number average molecular weight (Mn) of from 350 to 600 and a molecular weight distribution (Mw/Mn) of from 1:1 to about 2.0.
Inventors
- 👤 Mary E. Ahner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:12
CPC Classifications
C; C09; C09J; C09J109/00; C09J109/06; C09J7/00; C09J7/30; C09J7/38; C09J7/381; C09J7/383; B; B05; B05B; B05B12/00; B05B12/16; B05B12/20; B05B12/24; C08; C08L; C08L2666/00; C08L2666/02; C08L2666/04; C08L2666/06; Y; Y10; Y10T; Y10T428/00; Y10T428/28; Y10T428/2852; Y10T428/2861; Y10T428/2878; Y10T428/2883
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
164 words
An adhesive composition comprising from about 20% to about 80% by weight of a copolymer and, correspondingly, from about 80% to about 20% by weight of a tackifying hydrocarbon resin having a softening point of from 0° C. to about 40° C., a number average molecular weight of from about 100 to about 600, and a Gardner color less than about 7 prepared by the Friedel Crafts polymerization of a hydrocarbon feed comprising: (a) from about 5% to about 75% by weight of C 8 to C 10 vinyl aromatic hydrocarbon stream; (b) up to about 35% by weight of a piperlene concentrate; and (c) from about 25% to about 70% by weight of a C 4 to C 8 monoolefin chain transfer agent of the formula RR'C═R"R'" where R and R' are C 1 to C 5 alkyl, and R" and R'" are independently H or C 1 to C 4 alkyl group, wherein said copolymer and said tackifying hydrocarbon resin are compatible.
Claim 2
Dependent Claim
164 words
An adhesive composition comprising from about 20% to about 80% by weight of a copolymer and, correspondingly, from about 80% to about 20% by weight of a tackifying hydrocarbon resin having a softening point of from 0° C. to about 40° C., a number average molecular weight of from about 100 to about 600, and a Gardner color less than about 7 prepared by the Friedel Crafts polymerization of a hydrocarbon feed comprising: (a) from about 5% to about 75% by weight of C 8 to C 10 vinyl aromatic hydrocarbon stream; (b) up to about 35% by weight of a piperlene concentrate; and (c) from about 25% to about 70% by weight of a C 4 to C 8 monoolefin chain transfer agent of the formula RR'C═R"R'" where R and R' are C 1 to C 5 alkyl, and R" and R'" are independently H or C 1 to C 4 alkyl group, wherein said copolymer and said tackifying hydrocarbon resin are compatible.
Claim 3
Dependent Claim
17 words
An adhesive according to claim 1 wherein the hydrocarbon resin is prepared by aluminum chloride catalyzed polymerization.
Claim 4
Dependent Claim
29 words
An adhesive according to claim 1 wherein the adhesive comprises from about 35% to about 50% by weight of the hydrocarbon resin and said copolymer is a styrene/butadiene copolymer.
Claim 5
Dependent Claim
31 words
An adhesive according to claim 1 which also comprises up to about 60 wt% of an additional resin having a softening point of from about 80° C. to about 120° C.
Claim 6
Dependent Claim
23 words
An adhesive according to claim 4 wherein said additional resin is aliphatic, aliphatic/aromatic, terpenic, terpenic/aliphatic, terpenic/aromatic, rosin ester, or a hydrogenated product thereof.
Claim 7
Dependent Claim
19 words
An adhesive according to claim 1 which also includes up to about 50% by weight of an inert filler.
Claim 8
Dependent Claim
13 words
An adhesive composition according to claim 1 wherein the hydrocarbon resin is hydrogenated.
Claim 9
Dependent Claim
141 words
An adhesive composition comprising from about 50% to about 65% by weight of styrene/butadiene copolymer and, correspondingly, from about 50% to about 35% by weight of a petroleum hydrocarbon resin having a softening point of from 10° C. to about 30° C., a Gardner color of 3 or less and a molecular weight distribution of from about 1.1 to about 1.3 with number average molecular weight of from about 100 to about 600; said resin being a Freidel Crafts catalyzed resin from a reaction mixture comprising: (a) from about 5 to about 35 parts by weight of alpha-methyl styrene, styrene or mixtures thereof; (b) up to about 26 parts by weight of a heat soaked piperlene concentrate; and (c) from about 25 to about 70 parts by weight of a mixed C 6 monoolefin stream prepared from the dimerization of propylene.
Claim 10
Dependent Claim
141 words
An adhesive composition comprising from about 50% to about 65% by weight of styrene/butadiene copolymer and, correspondingly, from about 50% to about 35% by weight of a petroleum hydrocarbon resin having a softening point of from 10° C. to about 30° C., a Gardner color of 3 or less and a molecular weight distribution of from about 1.1 to about 1.3 with number average molecular weight of from about 100 to about 600; said resin being a Freidel Crafts catalyzed resin from a reaction mixture comprising: (a) from about 5 to about 35 parts by weight of alpha-methyl styrene, styrene or mixtures thereof; (b) up to about 26 parts by weight of a heat soaked piperlene concentrate; and (c) from about 25 to about 70 parts by weight of a mixed C 6 monoolefin stream prepared from the dimerization of propylene.
Claim 11
Dependent Claim
30 words
The adhesive composition of claim 8 wherein component (a) of the reaction mixture from which the resin is formed is a mixture of substantially pure styrene and alpha-methyl styrene monomers.
Claim 12
Dependent Claim
12 words
The adhesive composition of claim 8 wherein the hydrocarbon resin is hydrogenated.
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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) | 1992-07-31 | 1993-01-30 | 1993-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-31 | 1997-01-30 | 1997-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-31 | 2001-01-30 | 2001-08-01 | $7700.00 | Window Closed / Lapsed |