US4659785A
Expired / Lapsed
US
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Hot-melt adhesive composition
Assignee: Mitsui Chemicals Inc
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Filing: 1985-08-13
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Granted: 1987-04-21
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Expires: 2005-08-13
Abstract
Abstract A hot-melt adhesive composition comprising a styrene-type hydrocarbon-modified polyolefin (c) composed of 100 parts by weight of a crystalline polyolefin (a) having a degree of crystallinity of at least 10% and 0.15 to 50 parts by weight of a styrene-type hydrocarbon (b) bound thereto by great-copolymerization, said modified polyolefin (c) having an intrinsic viscosity [ eta ] of 0.5 to 5 dl/g, a degree of crystallinity of at least 10% and a weight average molecular weight &upbar& Mw/number average molecular weight &upbar& Mn ratio of from 1 to 15; and use of the aforesaid composition as an intermediate adhesive layer in laminating two polymers.
Inventors
- 👤 Riichiro Nagano
- 👤 Toshihiro Sagane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:35
CPC Classifications
B; B32; B32B; B32B7/00; B32B7/04; B32B7/12; C; C08; C08F; C08F255/00; B32B27/00; B32B27/06; B32B27/08; B32B27/30; B32B27/304; B32B27/32; C09; C09J; C09J151/00; C09J151/06; B32B37/00; B32B37/12; B32B37/1207; B32B2037/1215; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
169 words
A hot-melt adhesive composition comprising a styrene-type hydrocarbon-modified polyolefin (c) composed of 100 parts by weight of a crystalline polyolefin backbone (a) having a degree of crystallinity of at least 10% and 0.15 to 50 parts by weight of styrene-type hydrocarbon branches (b) bound at intervals along the polyolefin backbone, wherein said styrene-type hydrocarbon-modified polyolefin (c) is obtained by graft-copolymerization of the polyolefin (a) with the styrene-type hydrocarbon (b) in the heat-molten state in the presence of a radical initiator whereby the content of homopolymer of the styrene-type hydrocarbon is not more than 150 mole%, based on the amount of the styrene-type hydrocarbon bonded to the polyolefin backbone, said modified polyolefin (c) having an intrinsic viscosity (η) of 0.5 to 5 dl/g, a degree of crystallinity of at least 10% and a weight average molecular weight Mw/number average molecular weight Mn ratio of from 1 to 15, and wherein said crystalline polyolefin backbone is an ethylene copolymer selected from the group consisting of ethylene/alpha-olefin copolymers and ethylene/vinyl monomer copolymers.
Claim 2
Dependent Claim
169 words
A hot-melt adhesive composition comprising a styrene-type hydrocarbon-modified polyolefin (c) composed of 100 parts by weight of a crystalline polyolefin backbone (a) having a degree of crystallinity of at least 10% and 0.15 to 50 parts by weight of styrene-type hydrocarbon branches (b) bound at intervals along the polyolefin backbone, wherein said styrene-type hydrocarbon-modified polyolefin (c) is obtained by graft-copolymerization of the polyolefin (a) with the styrene-type hydrocarbon (b) in the heat-molten state in the presence of a radical initiator whereby the content of homopolymer of the styrene-type hydrocarbon is not more than 150 mole%, based on the amount of the styrene-type hydrocarbon bonded to the polyolefin backbone, said modified polyolefin (c) having an intrinsic viscosity (η) of 0.5 to 5 dl/g, a degree of crystallinity of at least 10% and a weight average molecular weight Mw/number average molecular weight Mn ratio of from 1 to 15, and wherein said crystalline polyolefin backbone is an ethylene copolymer selected from the group consisting of ethylene/alpha-olefin copolymers and ethylene/vinyl monomer copolymers.
Claim 3
Dependent Claim
18 words
The composition of claim 1 wherein the polyolefin (a) has a degree of crystallinity of at least 15%.
Claim 4
Dependent Claim
24 words
The composition of claim 1 wherein the polyolefin (a) has an intrinsic viscosity, measured at 135° C. in decalin, of 0.5 to 5 dl/g.
Claim 5
Dependent Claim
19 words
The composition of claim 1 wherein the polyolefin (a) has a density of 0.83 to 0.98 g/cm 3 .
Claim 6
Dependent Claim
26 words
The composition of claim 1 wherein the weight average molecular weight Mw/number average molecular weight Mn ratio of the polyolefin (a) is from 1 to 12.
Claim 7
Dependent Claim
33 words
The composition of claim 1 wherein the amount of the styrene-type hydrocarbon (b) bound by graft copolymerization is 0.2 to 5 parts by weight per 100 parts by weight of the polyolefin (a).
Claim 8
Dependent Claim
14 words
The composition of claim 1 wherein the styrene-type hydrocarbon is styrene, m-methylstyrene or p-methylstyrene.
Claim 9
Dependent Claim
19 words
The composition of claim 1 wherein the modified polyolefin (c) has an intrinsic viscosity of 0.7 to 4 dl/g.
Claim 10
Dependent Claim
19 words
The composition of claim 1 wherein the modified polyolefin (c) has a degree of crystallinity of at least 15%.
Claim 11
Dependent Claim
19 words
The composition of claim 1 wherein the modified polyolefin (c) has a Mw/Mn ratio of from 1 to 12.
Claim 12
Dependent Claim
20 words
The composition of claim 1 wherein the modified polyolefin (c) has a density of 0.83 to 0.98 g/cm 3 .
Claim 13
Dependent Claim
21 words
The composition of claim 1 wherein the modified polyolefin (c) has a melt viscosity of from 10 to 5×10 6 poises.
Claim 14
Dependent Claim
174 words
The composition of claim 1 comprising a styrene-type carbon-modified polyolefin (c) composed of 100 parts by weight of a crystalline polyolefin (a) having a degree of crystallinity of at least 15%, an intrinsic viscosity, measured at 135° C. in decalin, of 0.5 to 5 dl/g, a density of 0.83 to 0.98 g/cm 3 and a weight average molecular weight Mw/number average molecular weight Mn ratio of from 1 to 12, and wherein the polyolefin is selected from the group consisting of, ethylene/alpha-olefin copolymers having an ethylene content of at least 75 mole%, and ethylene/vinyl monomer copolymers having a total vinyl monomer content of not more than 15 mole%; and 0.2 to 5 parts by weight of (b) styrene, m-methylstyrene or p-methylstyrene graft-copolymerized onto the polyolefin (a), said modified polyolefin (c) having an intrinsic viscosity of 0.7 to 4 dl/g, a degree of crystallinity of at least 15%, a Mw/Mn ratio of from 1 to 12, a density of 0.83 to 0.98 g/cm 3 and a melt viscosity of from 10 to 5×10 6 poises.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1990-04-20 | 1990-10-20 | 1991-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-20 | 1994-10-20 | 1995-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-20 | 1998-10-20 | 1999-04-21 | $7700.00 | Window Closed / Lapsed |