Patent US3725322A successfully refreshed from Google Patents.
US3725322A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat curable elastomeric composition and products
Assignee: Permacel
•
Filing: 1971-04-23
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Granted: 1973-04-03
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Expires: 1991-04-23
Abstract
Abstract This specification discloses a new oil soluble phenol formaldehyde resin which comprises a reacted condensation catalyst consisting essentially of an alkaline earth metal salt of a hydroxy ring substituted monobasic aromatic or phenyl terminated aliphatic acid. The catalyst first acts to catalyze the condensation process and then is available to act as an accelerator in the event the resulting resin is to be used for curing compositions such as pressure-sensitive adhesives. Reactive and non-reactive resins of this invention, corresponding adhesives, and various catalysts such as zinc salicylate and others, are disclosed.
Inventors
- 👤 C Weidner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:14
CPC Classifications
C; C08; C08G; C08G8/00; C08G8/04; C08G8/08; C08G8/24; C09; C09J; C09J7/00; C09J7/30; C09J7/38; Y; Y10; Y10T; Y10T428/00; Y10T428/28; Y10T428/2852; Y10T428/2874
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
33 words
An elastomeric composition according to claim 1, wherein said acid is a benzoic or naphthoic acid, or a phenyl terminated unsaturated aliphatic acid having less than four carbon atoms in the aliphatic chain.
Claim 2
Dependent Claim
13 words
An elastomeric composition according to claim 2, wherein said acid is salicylic acid.
Claim 3
Dependent Claim
24 words
An elastomeric composition according to claim 1, wherein said alkaline earth metal is selected from the group consisting of zinc, cadmium, calcium and magnesium.
Claim 4
Dependent Claim
13 words
An elastomeric composition according to claim 4, wherein said acid is salicylic acid.
Claim 5
Dependent Claim
13 words
An elastomeric compsotion according to claim 5, wherein said salt is zinc salicylate.
Claim 6
Dependent Claim
35 words
An elastomeric adhesive composition according to claim 1, which is normally tacky and pressure-sensitive and comprises about 25-500 parts per hundred parts of said elastomer of a tackifier compatible with said elastomer and said resin.
Claim 7
Dependent Claim
159 words
A pressure-sensitive adhesive sheet or tape comprising a flexible backing coated on at least one major surface thereof with a pressure-sensitive adhesive composition, said sheet or tape being wound upon itself in successive convolutions to form a roll from which it is rapidly unwindable without delamination or offsetting of the adhesive on the backing, said adhesive composition comprising an aldehyde-resin-reactive elastomer and a heat curing phenol-formaldehyde resin, said resin consisting essentially of the product of the substantially anhydrous heat condensation of formaldehyde together with both a major proportion by weight of the resin of an ortho or para alkyl or aryl substituted first phenol and about 2-25 percent by weight of the resin of a phenolic condensation catalyst consisting essentially of an alkaline earth metal carboxylate salt of an ortho or meta hydroxy ring substituted monobasic aromatic or phenyl terminated aliphatic carboxylic acid, said alkaline earth metal being selected from the class consisting of zinc, cadmium, calcium and magnesium.
Claim 8
Dependent Claim
22 words
A pressure-sensitive adhesive sheet or tape according to claim 8, wherein the hydroxy ring substitution is in the ortho or meta position.
Claim 9
Dependent Claim
36 words
A pressure-sensitive adhesive sheet or tape according to claim 9, wherein said acid is a benzoic or naphthoic acid, or a phenyl terminated unsaturated aliphatic acid having less than four carbon atoms in the aliphatic chain.
Claim 10
Dependent Claim
16 words
A pressure-sensitive adhesive sheet or tape according to claim 10, wherein said acid is salicylic acid.
Claim 11
Dependent Claim
27 words
A pressure-sensitive adhesive sheet or tape according to claim 10, wherein said alkaline earth metal is selected from the group consisting of zinc, cadmium, calcium, and magnesium.
Claim 12
Dependent Claim
16 words
A pressure-sensitive adhesive sheet or tape according to claim 12, wherein said salt is zinc salicylate.
Claim 13
Dependent Claim
28 words
A pressure-sensitive adhesive sheet or tape according to claim 12, wherein the salicylic acid is present in the amount of about 3-12 percent by weight of the resin.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |