Patent EP0547799A1 successfully refreshed from Google Patents.
EP0547799A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Hot-melt compositions based on ethylene/methyl acrylate copolymers which have good open time, form creep-resistant bonds, and demonstrate strength at elevated temperatures when applied in thin layers
Assignee: 3M Co
•
Filing: 1992-11-30
•
Granted: —
•
Expires: 2012-11-30
Abstract
Abstract A hot-melt composition consists essentially of an ethylene/methyl acrylate copolymer and a tackifying resin. When deposited on an unheated substrate in a thin layer, the composition has a limited open time of at least 5 seconds, a creep resistance of 10,000 minutes, and an elevated temperature strength of at least 1,000 minutes.
Inventors
- 👤 Dennis D. c/o Minnesota Mining and Manuf. Hansen
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 15:55
CPC Classifications
C; C09; C09J; C09J9/00; C09J9/005; C09J123/00; C09J123/02; C09J123/04; C09J123/08; C08; C08L; C08L2666/00; C08L2666/02
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
38 words
A hot-melt composition consisting essentially of an ethylene/methyl acrylate copolymer and a tackifying resin, wherein said composition has a limited open time of at least 5 seconds when deposited as a thin layer on a room temperature substrate.
Claim 2
Dependent Claim
38 words
A hot-melt composition consisting essentially of an ethylene/methyl acrylate copolymer and a tackifying resin, wherein said composition has a limited open time of at least 5 seconds when deposited as a thin layer on a room temperature substrate.
Claim 3
Dependent Claim
18 words
A hot-melt composition according to claim 1 wherein said ethylene/methyl acrylate copolymer comprises less than 35% methyl acrylate.
Claim 4
Dependent Claim
19 words
A hot-melt composition according to claim 1 wherein said ethylene/methyl acrylate copolymer has a melt index greater than 70.
Claim 5
Dependent Claim
33 words
A hot-melt composition according to claim 1 wherein said tackifying resin is selected from the group consisting of cyclopentadiene and tackifying resins having an aromatic/olefinic content of at least about 0.5 mole %.
Claim 6
Dependent Claim
25 words
A hot-melt composition according to claim 1 wherein said tackifying resin has a nominal ring and ball softening point of from about 70° to 125°C.
Claim 7
Dependent Claim
29 words
A hot-melt composition according to claim 1 comprising about 80 to 210 parts by weight of said tackifying resin per 100 parts by weight of said ethylene/methyl acrylate copolymer.
Claim 8
Dependent Claim
23 words
A hot-melt composition according to claim 1 further including a material selected from the group consisting of ethylene/n-butyl acrylate and ethylene/vinyl acetate copolymers.
Claim 9
Dependent Claim
17 words
A hot-melt composition according to claim 1 which has a creep resistance of at least 1,000 minutes.
Claim 10
Dependent Claim
18 words
A hot-melt composition according to claim 1 which has an elevated temperature strength of at least 1,000 minutes.
Claim 11
Dependent Claim
21 words
An article according to claim 23 wherein said layer of hot-melt composition has a thickness of about 50 to 250 microns.
Claim 12
Dependent Claim
12 words
An adhesive rod comprising a hot-melt composition according to any preceding claim.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.