US4048124A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure sensitive adhesive
Assignee: Zeon Corp
•
Filing: 1976-02-10
•
Granted: 1977-09-13
•
Expires: 1996-02-10
Abstract
Abstract A pressure sensitive adhesive composition comprising (A) 100 parts by weight of a conjugated diene-type rubber, and (B) 30 to 250 parts by weight of a hydrocarbon resin having a softening point of 60 DEG C to 140 DEG C and comprising (a) 45 to 85% by weight of a unit derived from 1,3-pentadiene, (b) 10 to 45% by weight of a unit derived from alpha -methylstyrene, (c) 3 to 20% by weight of a unit derived from cyclopentene, (d) 0 to 20% by weight of a unit derived from 1,3-butadiene, and (e) 0 to 5% by weight of a unit derived from a copolymerizable monomer selected from isoprene, cyclopentadiene and dicyclopentadiene.
Inventors
- 👤 Atsuo Ishikawa
- 👤 Hidemi Tsubaki
- 👤 Hitoshi Takahata
- 👤 Riso Iwata
- 👤 Yonesaku Shinohara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:17
CPC Classifications
C; C08; C08F; C08F236/00; C08F236/02; C08F236/04; C08F236/045; C09; C09J; C09J121/00; C08L; C08L2666/00; C08L2666/02; C08L2666/04; C08L2666/08
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
150 words
A pressure sensitive adhesive composition comprising (A) 100 parts by weight of a conjugated diene rubber selected from the group consisting of natural rubber and synthetic rubber having a Mooney viscosity (ML 1 +4 /100° C) of at least 30 and containing at least 50% by weight of a conjugated diolefin unit in the polymer chain, and (B) 30 to 250 parts by weight of a hydrocarbon resin having a softening point of 60° C to 140° C and consisting essentially of (a) 45 to 85% by weight of a unit derived from 1,3-pentadiene, (b) 10 to 45% by weight of a unit derived from α-methylstyrene, (c) 3 to 20% by weight of a unit derived from cyclopentene, (d) 0 to 20% by weight of a unit derived from 1,3-butadiene, and (e) 0 to 5% by weight of a unit derived from copolymerizable monomer selected from isoprene, cyclopentadiene and dicyclopentadiene.
Claim 2
Dependent Claim
150 words
A pressure sensitive adhesive composition comprising (A) 100 parts by weight of a conjugated diene rubber selected from the group consisting of natural rubber and synthetic rubber having a Mooney viscosity (ML 1 +4 /100° C) of at least 30 and containing at least 50% by weight of a conjugated diolefin unit in the polymer chain, and (B) 30 to 250 parts by weight of a hydrocarbon resin having a softening point of 60° C to 140° C and consisting essentially of (a) 45 to 85% by weight of a unit derived from 1,3-pentadiene, (b) 10 to 45% by weight of a unit derived from α-methylstyrene, (c) 3 to 20% by weight of a unit derived from cyclopentene, (d) 0 to 20% by weight of a unit derived from 1,3-butadiene, and (e) 0 to 5% by weight of a unit derived from copolymerizable monomer selected from isoprene, cyclopentadiene and dicyclopentadiene.
Claim 3
Dependent Claim
131 words
A pressure sensitive adhesive composition comprising (A) 100 parts by weight of a conjugated diene rubber selected from the group consisting of natural rubber and synthetic rubber having a Mooney viscosity (ML 1 +4 /100° C) of at least 30 and containing at least 50% by weight of a conjugated diolefin unit in the polymer chain, and (B) 50 to 200 parts by weight of a hydrocarbon resin having a softening point to 60° C to 120° C and consisting essentially of (a) 45 to 85% by weight of a unit derived from 1,3-pentadiene, (b) 10 to 45% by weight of a unit derived from α-methylstyrene, (c) 3 to 20% by weight of a unit derived from cyclopentene, and (d) 2 to 15% by weight of a unit derived from 1,3-butadiene.
Claim 4
Dependent Claim
131 words
A pressure sensitive adhesive composition comprising (A) 100 parts by weight of a conjugated diene rubber selected from the group consisting of natural rubber and synthetic rubber having a Mooney viscosity (ML 1 +4 /100° C) of at least 30 and containing at least 50% by weight of a conjugated diolefin unit in the polymer chain, and (B) 50 to 200 parts by weight of a hydrocarbon resin having a softening point to 60° C to 120° C and consisting essentially of (a) 45 to 85% by weight of a unit derived from 1,3-pentadiene, (b) 10 to 45% by weight of a unit derived from α-methylstyrene, (c) 3 to 20% by weight of a unit derived from cyclopentene, and (d) 2 to 15% by weight of a unit derived from 1,3-butadiene.
Claim 5
Dependent Claim
13 words
The composition of claim 1 wherein the conjugated diene rubber is natural rubber.
Claim 6
Dependent Claim
43 words
The composition of claim 1 wherein the conjugated diene rubber is a synthetic rubber having a Mooney viscosity (ML 1 +4 /100° C.) of at least 30 and containing at least 50% by weight of a conjugated diolefin unit in the polymer chain.
Claim 7
Dependent Claim
25 words
The composition of claim 4 wherein the synthetic rubber is polyisoprene, polybutadiene, a butadiene/styrene copolymer, a butadiene/isoprene copolymer, an isoprene/styrene copolymer or a butadiene/acrylonitrile copolymer.
Claim 8
Dependent Claim
13 words
The composition of claim 2 wherein the conjugated diene rubber is natural rubber.
Claim 9
Dependent Claim
42 words
The composition of claim 2 wherein the conjugated diene rubber is a synthetic rubber having a Mooney viscosity (ML 1 +4 /100°C) of at least 30 and containing at least 50% by weight of a conjugated diolefin unit in the polymer chain.
Claim 10
Dependent Claim
25 words
The composition of claim 7 wherein the synthetic rubber is polyisoprene, polybutadiene, a butadiene/styrene copolymer, a butadiene/isoprene copolymer, an isoprene/styrene copolymer or a butadiene/acrylonitrile copolymer.
Claim 11
Dependent Claim
107 words
The pressure-sensitive adhesive composition of claim 1 wherein the hydrocarbon resin (b) consists essentially of (a) 51 to 77% by weight of a unit derived from 1,3-pentadiene, (b) 11 to 40% by weight of a unit derived from α-methylstyrene, (c) 8 to 9% by weight of a unit derived from cyclopentene, (d) 0 to 5% by weight of a unit derived from 1,3-butadiene, (e) 0 to 4% by weight of a unit derived from dicyclopentadiene, and (f) 1 to 3% by weight of a monolefin having 5 to 6 carbon atoms, said hydrocarbon resin having a softening point in the range of from 85° to 106° C.
Claim 12
Dependent Claim
103 words
The pressure-sensitive adhesive composition of claim 9 having a tackiness, in terms of a diameter, in inches, of the largest stainless steel ball which will be stopped from rolling past a 10 cm long, 25 mil thick layer of the pressure-sensitive adhesive composition which is adhered to a stainless steel plate at an angle of 30° when the ball starts from rest at the beginning of the layer, of from 15/32 to 22/32 inch, an adhesive strength, measured in accordance with JIS Z-1522 of 390 to 450 g/inch, and a cohesive strength, measured in accordance with JIS Z-1542, of 22 to 27 minutes/mm.
References Cited (Backward Citations)
US3509239A
Cited
US3554940A
Cited
US3960823A
Cited
US3846352A
Cited
US3893986A
Cited
US3966690A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-12 | 1981-03-14 | 1981-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-12 | 1985-03-14 | 1985-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-12 | 1989-03-14 | 1989-09-13 | $7700.00 | Window Closed / Lapsed |