Patent US4284541A successfully refreshed from Google Patents.
US4284541A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot-melt pressure sensitive adhesive compound
Assignee: Mitsui Chemicals Inc
•
Filing: 1979-11-13
•
Granted: 1981-08-18
•
Expires: 1999-11-13
Abstract
Abstract A hot-melt compound comprising 30 to 70% by weight of a modified ethylene. alpha -olefin copolymer rubber having a melt index of at most 500 and prepared by grafting an unsaturated carboxylic acid or derivative thereof to an ethylene. alpha -olefin copolymer rubber or a partial ester of said modified copolymer rubber and 70 to 30% by weight of a tackifier.
Inventors
- 👤 Masami Takeda
- 👤 Riichiro Nagano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:47
CPC Classifications
C; C08; C08L; C08L51/00; C08L51/06; C08F; C08F255/00; C08F255/02; C08F255/026; C08F255/06; C09; C09J; C09J151/00; C09J151/06; C08L2666/00; C08L2666/02
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
94 words
A hot-melt pressure sensitive adhesive compound consisting essentially of: (a) 30 to 70% by weight of a modified ethylene.α-olefin copolymer rubber containing from 40 to 85 mol % of ethylene units, having a melt index of 5 to 500 and prepared by grafting an unsaturated carboxylic acid or derivative thereof to an ethylene.α-olefin copolymer rubber or a partial ester of said modified copolymer rubber, and (b) 70 to 30% by weight of a tackifier selected from the group consisting of aliphatic, aromatic alicyclic and copolymer type petroleum resins, terpene resin, rosin and cumarone-indene resin.
Claim 2
Dependent Claim
94 words
A hot-melt pressure sensitive adhesive compound consisting essentially of: (a) 30 to 70% by weight of a modified ethylene.α-olefin copolymer rubber containing from 40 to 85 mol % of ethylene units, having a melt index of 5 to 500 and prepared by grafting an unsaturated carboxylic acid or derivative thereof to an ethylene.α-olefin copolymer rubber or a partial ester of said modified copolymer rubber, and (b) 70 to 30% by weight of a tackifier selected from the group consisting of aliphatic, aromatic alicyclic and copolymer type petroleum resins, terpene resin, rosin and cumarone-indene resin.
Claim 3
Dependent Claim
26 words
The compound according to claim 1, wherein the α-olefin component of the ethylene.α-olefin copolymer rubber is selected from the group consisting of propylene, 1-butene and 4-methyl-1-pentene.
Claim 4
Dependent Claim
25 words
The compound according to claim 1, wherein the α-olefin component of the ethylene.α-olefin copolymer rubber is selected from the group consisting of propylene and 1-butene.
Claim 5
Dependent Claim
19 words
The compound according to claim 1, wherein the ethylene.α-olefin copolymer rubber contains at most 0.5 mol % of polyene.
Claim 6
Dependent Claim
24 words
The compound according to claim 1, wherein the partial ester of the modified copolymer rubber has at most 80 mol % of esterification rate.
Claim 7
Dependent Claim
16 words
The compound according to claim 1, wherein the unsaturated carboxylic acid is an unsaturated dicarboxylic acid.
Claim 8
Dependent Claim
29 words
The compound according to claim 1, wherein the unsaturated carboxylic acid is selected from the group consisting of acrylic acid, methacrylic acid, maleic acid, fumaric acid, and itaconic acid.
Claim 9
Dependent Claim
32 words
The compound according to claim 1, wherein the unsaturated carboxylic acid derivative is selected from the group consisting of an anhydride, ester, amide, imide and metal salt of an unsaturated carboxylic acid.
Claim 10
Dependent Claim
16 words
The compound according to claim 8, wherein the unsaturated carboxylic anhydride is an unsaturated dicarboxylic anhydride.
Claim 11
Dependent Claim
14 words
The compound according to claim 9, wherein the unsaturated dicarboxylic anhydride is maleic anhydride.
Claim 12
Dependent Claim
28 words
The compound according to claim 1, wherein the modified ethylene.α-olefin copolymer rubber contains 0.01 to 10% by weight of an unsaturated carboxylic acid or derivative thereof grafted thereto.
Claim 13
Dependent Claim
63 words
The compound according to claim 1, wherein the aliphatic petroleum resin is selected from the group consisting of a polymer polymerized from a mixture of unsaturated compounds consisting essentially of aliphatic hydrocarbons having a boiling point ranging between -30° C. and +50° C., an acid-modified polymer obtained by modifying said polymer with an acid, and a hydrogenated polymer obtained by hydrogenating said polymer.
Claim 14
Dependent Claim
63 words
The compound according to claim 1, wherein the aromatic petroleum resin is selected from the group consisting of a polymer polymerized from a mixture of unsaturated compounds consisting essentially of aromatic hydrocarbons having a boiling point ranging between 100° C. and 300° C., an acid-modified polymer obtained by modifying said polymer with an acid, and a hydrogenated polymer obtained by hydrogenating said polymer.
Claim 15
Dependent Claim
26 words
The compound according to claim 1, wherein the terpene resin is selected from the group consisting of a homopolymer of terpenes and a copolymer of terpenes.
Claim 16
Dependent Claim
25 words
The compound according to claim 1, wherein the resin is selected from the group consisting of natural rosin, ester of rosin and carboxylic acid-modified rosin.
Claim 17
Dependent Claim
22 words
The compound according to claim 1, wherein the tackifier is selected from the group consisting of terpene resin and aliphatic petroleum resin.
Claim 18
Dependent Claim
30 words
The compound according to claim 1, which further contains at least one compounding agent selected from the group consisting of a softener, an antioxidant, an ultraviolet absorber and a filler.
Claim 19
Dependent Claim
20 words
The compound according to claim 1, wherein the melt index of said ethylene α-olefin copolymer rubber is 10 to 200.
Claim 20
Dependent Claim
25 words
The compound according to claim 11, wherein the copolymer rubber contains 1 to 5% by weight of an unsaturated carboxylic acid or derivative grafted thereto.
Claim 21
Dependent Claim
80 words
A hot-melt pressure-sensitive adhesive compound consisting essentially of: (a) 30 to 70% by weight of a modified ethylenepropylene copolymer rubber containing from 60 to 83 mol % of ethylene units, having a melt index of 10 to 200 and prepared by grafting from 1 to 5% by weight of maleic acid, maleic anhydride, acrylic acid, methacrylic acid or methyl methacrylate onto said ethylene-propylene rubber; and (b) from 70 to 30% by weight of a petroleum resin or terpene resin tackifier.
Claim 22
Dependent Claim
80 words
A hot-melt pressure-sensitive adhesive compound consisting essentially of: (a) 30 to 70% by weight of a modified ethylenepropylene copolymer rubber containing from 60 to 83 mol % of ethylene units, having a melt index of 10 to 200 and prepared by grafting from 1 to 5% by weight of maleic acid, maleic anhydride, acrylic acid, methacrylic acid or methyl methacrylate onto said ethylene-propylene rubber; and (b) from 70 to 30% by weight of a petroleum resin or terpene resin tackifier.
Claim 23
Dependent Claim
16 words
The compound according to claim 20, wherein the melt index of said ethylene-propylene rubber is 20-100.
Claim 24
Dependent Claim
15 words
The compound according to claim 20, wherein maleic anhydride is grafted onto said ethylene-propylene rubber.
References Cited (Backward Citations)
US3868433A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-08-17 | 1985-02-16 | 1985-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-17 | 1989-02-16 | 1989-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-17 | 1993-02-16 | 1993-08-18 | $7700.00 | Window Closed / Lapsed |