Patent US4592690A successfully refreshed from Google Patents.
US4592690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot melt gasketing compositions and processes for applying them
Assignee: BONDED PRODUCTS Inc A CORP OF PA
•
Filing: 1985-01-28
•
Granted: 1986-06-03
•
Expires: 2005-01-28
Abstract
Abstract Compositions from 25% to 65% of a synthetic rubber block copolymer and from 75% to 35% plasticizer by weight are heated and mixed and applied, usually with a curing agent, to the lid or cover of a container such as a drum or pail. The application may take place while the lid or cover is revolved and the heated mixture is flowed on. The synthetic rubbers may be of the groups comprising SBS rubber, SIS rubber, S-EB-S rubber. The plasticizer may be from the group comprising paraffin, oils or waxes, polyethylene, polypropylene or ethyl vinyl alcohol. Apparatus is also shown and described for implementing the application of the compositions to the lid or cover as it is revolved. If a groove is formed in the cover before reception of the composition, the apparatus extrudes or flows it into the groove and then the flowed-in material is permitted to set.
Inventors
- 👤 Fred A. Busch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:51
CPC Classifications
B; B05; B05C; B05C5/00; B05C5/02; B05C5/0208; B05C5/0212; B05C5/0216; B05C5/022; B29; B29C; B29C31/00; B29C31/04; B29C31/042; B29C31/047; B29C39/00; B29C39/02; B29C39/10; B29C70/00; B29C70/68; B29C70/78; B29C70/80; B29K; B29K2021/00; B29K2096/00; B29K2096/04
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
88 words
A method of forming a gasket on the lid or cover of a container such as a drum or pail or the like, comprising: (a) providing a hot-melt composition which comprises 25%-65% by weight of snythetic rubber copolymers mixed with 75%-35% of a plasticizer, (b) rotating said cover or lid, (c) applying said composition to said cover or lid while rotating, said rotation being at a speed low enough to prevent centrifugal force from causing dispersion of the applied composition, and (d) permitting said applied composition to set.
Claim 2
Independent Claim
88 words
A method of forming a gasket on the lid or cover of a container such as a drum or pail or the like, comprising: (a) providing a hot-melt composition which comprises 25%-65% by weight of snythetic rubber copolymers mixed with 75%-35% of a plasticizer, (b) rotating said cover or lid, (c) applying said composition to said cover or lid while rotating, said rotation being at a speed low enough to prevent centrifugal force from causing dispersion of the applied composition, and (d) permitting said applied composition to set.
Claim 3
Dependent Claim
30 words
The method according to claim 1 wherein a curing composition is brought into contact with the first-named composition just prior to applying said first composition to said cover or lid.
Claim 4
Dependent Claim
22 words
The method according to claim 2 wherein said curing composition is selected from the group comprising a peroxide or an azo catalyst.
Claim 5
Dependent Claim
23 words
The method according to claim 3 wherein said peroxide is selected from the group comprising benzoyl peroxide, dicumyl peroxide, or ditertiary butyl peroxide.
Claim 6
Dependent Claim
43 words
The method according to claim 1 wherein there is a gasket-forming groove formed in said lid and wherein said composition is applied to said groove at about 40-80 pounds per square inch and at a temperature in the range of about 275°-325° F.
Claim 7
Dependent Claim
74 words
The process of forming, in place, a gasket for a container having a lid or the like, which comprises: (a) providing a hot fluid composition which comprises 25%-65% by weight of synthetic rubber copolymers mixed with 75%-35% of a plasticizer, (b) providing a curing composition for said (a) composition, (c) bringing said (a) and (b) compositions together, and (d) immediately applying said brought-together compositions to a predetermined portion of said lid or the like.
Claim 8
Dependent Claim
74 words
The process of forming, in place, a gasket for a container having a lid or the like, which comprises: (a) providing a hot fluid composition which comprises 25%-65% by weight of synthetic rubber copolymers mixed with 75%-35% of a plasticizer, (b) providing a curing composition for said (a) composition, (c) bringing said (a) and (b) compositions together, and (d) immediately applying said brought-together compositions to a predetermined portion of said lid or the like.
Claim 9
Dependent Claim
18 words
The process according to claim 1 with the addition of step (e) permitting said applied compositions to cool.
Claim 10
Dependent Claim
26 words
The process according to claim 6 wherein the application of said brought-together compositions is by flowing said last-named compositions onto said predetermined portion of the container.
Claim 11
Dependent Claim
19 words
The process according to claim 8 wherein said predetermined portion comprises a groove in said lid or the like.
Claim 12
Dependent Claim
24 words
The process according to claim 8 wherein said lid or the like is turned while said application of said brought-together compositions thereto is effected.
Claim 13
Dependent Claim
27 words
The process according to claim 8 wherein said application of said brought-together compositions is made while they are at a temperature in excess of about 275° F.
Claim 14
Dependent Claim
24 words
The process according to claim 6 wherein said synthetic rubber copolymer is selected from the group comprising styrene-butadiene-styrene rubber, styrene-isoprene-styrene rubber, or styrene-ethylene-butylene-styrene rubber.
Claim 15
Dependent Claim
36 words
The process according to claim 6 wherein up to about 50% by weight of said rubber content is replaced by rubber selected from the group comprising butyl rubbers, ethylene-propylene rubbers, EPDM rubbers, styrene-ethylene or styrene-butylene rubbers.
Claim 16
Dependent Claim
25 words
The process according to claim 6 wherein said plasticizer is selected from the group comprising paraffin oils or waxes, polyethylene, polypropylene and ethyl vinyl alcohol.
Claim 17
Dependent Claim
20 words
The process according to claim 14 wherein said paraffin oils or waxes have a SUS viscosity greater than about 400.
Claim 18
Dependent Claim
20 words
The process according to claim 14 wherein said paraffin oils or waxes have a flashpoint greater than about 400° F.
Claim 19
Dependent Claim
17 words
The process according to claim 14 wherein said paraffin oils or waxes are less than 1% aromatic.
Claim 20
Dependent Claim
22 words
The process according to claim 6 wherein said curing agent is selected from the group comprising a peroxide or an azo catalyst.
Claim 21
Dependent Claim
23 words
The process according to claim 18 wherein said peroxide is selected from the group comprising benzoyl peroxide, dicumyl peroxide, or ditertiary butyl peroxide.
Claim 22
Dependent Claim
13 words
The process according to claim 18 wherein said azo catalyst comprises azobisisobutyrl nitrile.
Claim 23
Dependent Claim
17 words
A method according to claim 1 wherein said applied composition is permitted to set at ambient temperature.
Claim 24
Dependent Claim
28 words
A method according to claim 7 wherein said applied composition is permitted to cool at ambient temperature whereupon a gasket is formed on said lid or the like.
Claim 25
Dependent Claim
22 words
A method according to claim 1 wherein the said step (c) is initiated while said cover or lid is at ambient temperature.
Claim 26
Dependent Claim
15 words
A method according to claim 23 wherein said step (c) is performed at ambient pressure.
Claim 27
Dependent Claim
21 words
A method according to claim 23 wherein said step (d) is performed at ambient pressure and no pressure is thereafter applied.
Claim 28
Dependent Claim
11 words
A method according to claim 21 wherein said composition is non-volatile.
Claim 29
Dependent Claim
11 words
A method according to claim 6 wherein said composition is non-volatile.
Claim 30
Independent Claim
100 words
A method of forming a gasket on the lid or cover of a container such as a drum or pail or the like, comprising: (a) providng a hot-melt composition which comprises 25%-65% by weight of synthetic rubber copolymers mixed with 75%-35% of a plasticizer, (b) applying said composition while imparting relative rotation between said lid or cover and the point where said applying occurs, said applying being at a speed such as not to cause substantial dispersion of said composition on said cover or lid subsequent to its coming into contact therewith, and (c) permitting said applied composition to set.
Claim 31
Independent Claim
100 words
A method of forming a gasket on the lid or cover of a container such as a drum or pail or the like, comprising: (a) providng a hot-melt composition which comprises 25%-65% by weight of synthetic rubber copolymers mixed with 75%-35% of a plasticizer, (b) applying said composition while imparting relative rotation between said lid or cover and the point where said applying occurs, said applying being at a speed such as not to cause substantial dispersion of said composition on said cover or lid subsequent to its coming into contact therewith, and (c) permitting said applied composition to set.
Claim 32
Dependent Claim
15 words
A method according to claim 1 wherein said composition sets by having its temperature lowered.
Claim 33
Dependent Claim
14 words
A method according to claim 1 wherein said copolymers are synthetic rubber block copolymers.
Claim 34
Dependent Claim
14 words
A method according to claim 6 wherein said copolymers are synthetic rubber block copolymers.
Claim 35
Dependent Claim
14 words
A method according to claim 1 wherein said gasket does not exude said plasticizer.
References Cited (Backward Citations)
US597386A
Cited
US1578407A
Cited
US1517340A
Cited
US2413449A
Cited
US3118783A
Cited
US3344093A
Cited
US4102304A
Cited
US4000836A
Cited
US4051096A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-06-02 | 1989-12-02 | 1990-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-02 | 1993-12-02 | 1994-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-02 | 1997-12-02 | 1998-06-03 | $7700.00 | Window Closed / Lapsed |