EP0193295A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Nontacky acrylonitrile/butadiene adhesive tape
Assignee: 3M Co
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Filing: 1986-02-05
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Granted: —
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Expires: 2006-02-05
Abstract
Abstract Adhesive tape, the adhesive layer of which comprises a copolymer of (a) acrylonitrile and (b) butadiene and/or isoprene. Even though such an adhesive copolymer layer is usually substantially nontacky, it forms under moderate pressure bonds to many substrates which become stonger than the substrates. The bonds become strong more quickly when heated while the pressure is being applied. For a usefully long period of time after initiating a bond, the tape usually is repositionable.
Inventors
- 👤 Robert C. Minnesota Mining And Brown
- 👤 Shih-Lai Minnesota Mining And Lu
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 18:12
CPC Classifications
C; C09; C09J; C09J109/00; C09J109/02; C09J7/00; C09J7/20; C09J7/203; C09J7/30; C09J7/38; C09J7/381; C09J7/383; Y; Y10; Y10S; Y10S206/00; Y10S206/813; Y10T; Y10T428/00; Y10T428/13; Y10T428/1334; Y10T428/1345; Y10T428/1352; Y10T428/1355; Y10T428/1397; Y10T428/24; Y10T428/24802; Y10T428/28; Y10T428/2839; Y10T428/2852; Y10T428/2878; Y10T428/2883; Y10T428/2887
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
115 words
Adhesive tape comprising a backing have an adhesive layer (containing a filler, if desired) on a first face, said first face optionally having (a) a low adhesion surface thereby permitting transfer of the abrasive or (b) being strongly adhered to by said adhesive, the other face of said backing optionally be provided with a release layer, characterized in that the adhesive layer comprises an uncrosslinked copolymer of (a) 10 to 50 weight percent of acrylonitrile and (b) 50 to 90 weight percent of at least one of butadiene and isoprene, said copolymer having a Mooney viscosity of from 30 to 95, and said adhesive copolymer layer having a water contact angle of at least 20°.
Claim 2
Dependent Claim
115 words
Adhesive tape comprising a backing have an adhesive layer (containing a filler, if desired) on a first face, said first face optionally having (a) a low adhesion surface thereby permitting transfer of the abrasive or (b) being strongly adhered to by said adhesive, the other face of said backing optionally be provided with a release layer, characterized in that the adhesive layer comprises an uncrosslinked copolymer of (a) 10 to 50 weight percent of acrylonitrile and (b) 50 to 90 weight percent of at least one of butadiene and isoprene, said copolymer having a Mooney viscosity of from 30 to 95, and said adhesive copolymer layer having a water contact angle of at least 20°.
Claim 3
Dependent Claim
23 words
Adhesive tape as defined in claim 1 further characterized in that monomer (a) provides from 20 to 40 weight percent of the copolymer.
Claim 4
Dependent Claim
14 words
Adhesive tape as defined in claim 1 or 2 wherein said copolymer is hydrogenated.
Claim 5
Dependent Claim
20 words
Adhesive tape as defined in any preceding claim further characterized in that the water contact angle is at least 50°.
Claim 6
Dependent Claim
16 words
Adhesive tape of any preceding claim, further characterized in that the adhesive copolymer layer is discontinuous.
Claim 7
Dependent Claim
37 words
Adhesive tape as defined in claim 5, further characterized in that the adhesive copolymer layer forms an orderly pattern of closely spaced segments, the widths of - which are small compared to the width of the tape.
Claim 8
Dependent Claim
25 words
The tape of any preceding claim further characterized in that it is permanently adhered to a flap that releasably closes a panel having an opening.
Claim 9
Dependent Claim
19 words
Adhesive tape of any preceding claim wherein the tape seals the opening of a container formed with an opening.
Claim 10
Dependent Claim
34 words
The tape of any preceding claim further characterized in that the backing is a strong transparent thermoplastic film, the adhesive covering the first face and a release layer strongly adhered to the other face.
Claim 11
Dependent Claim
28 words
The tape of claim 9 further characterized in that the film backing is a vinyl film and the release layer is a copolymer of ethylene and vinyl acetate.
Claim 12
Dependent Claim
16 words
The tape of claim 9 or 10, further characterized in that it is'thermoformed into a blister.
Claim 13
Dependent Claim
31 words
The tape of claim 11 further characterized in that the thermoformed blister has a plurality of compartments, a punch-open membrane being adhered to the adhesive at the flanges of the blister.
References Cited (Backward Citations)
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