Patent US3637430A successfully refreshed from Google Patents.
US3637430A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cellulosic substrates impregnated with a cyclopentadiene dimer substituted resole
Assignee: Monsanto Co
•
Filing: 1968-07-25
•
Granted: 1972-01-25
•
Expires: 1988-07-25
Abstract
Abstract Cellulosic substrates impregnated with a phenol-formaldehyde resin using a phenol which has been previously substituted with a specific mixture of cyclopentadiene codimers. The resulting impregnated sheets display an improved combination of properties including good tensile strength and flexibility, and are especially useful as filter media and as intermediates for the manufacture of laminates.
Inventors
- 👤 Ronald H Dahms
- 👤 George J Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:05
CPC Classifications
B; B32; B32B; B32B29/00; B32B29/002; C; C08; C08G; C08G8/00; C08G8/28; C08G8/30; D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/46; D21H17/47; D21H17/48; B32B2260/00; B32B2260/02; B32B2260/028; B32B2260/04; B32B2260/046; B32B2307/00; B32B2307/70; B32B2307/718; B32B2309/00; B32B2309/08; B32B2309/10; B32B2309/105; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31942; Y10T428/31949; Y10T442/00; Y10T442/20; Y10T442/2369
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
23 words
being produced by reacting under a aqueous liquid phase conditions formaldehyde and a substituted phenol mixture in the presence of a basic catalyst,
Claim 2
Dependent Claim
34 words
from about 1 to 50 weight percent of compounds each molecule of which is a codimer of cyclopentadiene with at least one acyclic conjugated alkadiene having from four through six carbon atoms per molecule.
Claim 3
Dependent Claim
90 words
The product of claim 1 wherein said mixture of cyclopentadiene dimers (same basis) comprises: A. from about 70 to 90 weight percent of dicyclopentadiene B. from about 10 to 30 weight percent of compounds each molecule of which is a codimer of cyclopentadiene with at least one acyclic conjugated alkadiene having from four through six carbon atoms per molecule, and C. from about 2 to 15 weight percent of compounds each molecule of which is a cyclic and/or an acyclic conjugated alkadiene having five or six carbons atoms per molecule.
Claim 4
Dependent Claim
6 words
from 9 through 13 carbon atoms
Claim 5
Dependent Claim
7 words
from about 10 through 13 carbon atoms
Claim 6
Dependent Claim
6 words
from eight through 13 carbon atoms
Claim 7
Dependent Claim
16 words
as substituents from zero through three groups selected from the class consisting of methyl and ethyl.
Claim 8
Dependent Claim
59 words
as nuclear substituents from zero through three methyl groups, C''''. from about 4 to 10 weight percent of compounds each molecule of which is a codimer of cyclopentadiene with at least one acyclic conjugated alkadiene having from four through six carbon atoms per molecule, and D''''. from about 4 to 30 percent of compounds each molecule of which has:
Claim 9
Dependent Claim
24 words
as nuclear substituents from zero through four methyl groups B''''. from about 50 to 70 weight percent of compounds each molecule of which has
Claim 10
Dependent Claim
30 words
The product of the claim 1 wherein said mixture of cyclopentadiene dimers (same basis) comprises: A''''. from about 1.5 to 10 weight percent of compounds each molecule of which has:
Claim 11
Dependent Claim
26 words
being substantially insoluble in water but having a viscosity in methanol solution at 60 weight percent solids concentration of not greater than about 5,000 centipoises, and
Claim 12
Dependent Claim
83 words
having a free-formaldehyde content which is less than about 5 weight percent, D. said substituted phenol mixture having been prepared by reacting phenol under Friedel-Crafts conditions with from about 10 to 100 parts by weight for each 100 parts by weight of said phenol of a mixture of cyclopentadiene dimers, E. said mixture of cyclopentadiene dimers comprising (when in a form substantially free of other materials wherein the sum of all component compounds in any given such mixture equals substantially 100 weight percent):
Claim 13
Dependent Claim
106 words
The product of claim 1 wherein said mixture of cyclopentadiene dimers-same basis comprises: A''''''. from about 92 to 97 weight percent of dicyclopentadiene, B''''''. from about 1 to 5 weight percent of compounds each molecule of which is a codimer of cyclopentadiene with at least one acyclic conjugated alkadiene having from four through six carbon atoms per molecule, and C''''''. from about 1 to 4 weight percent of compounds each molecule of which is a codimer of cyclopentadiene with a methylcyclopentadiene, provided that the sum of (A'''''') and (C'''''') in any given such cyclopentadiene dimer mixture is always at least about 95 weight percent thereof-same basis.
Claim 14
Dependent Claim
58 words
The product of claim 1 wherein said resole resin is made by reacting said phenol and said mixture of carbocyclic compounds in the presence of an inert hydrocarbon such that, of the combined weight of said mixture of carbocyclic compound and said inert hydrocarbon, the inert hydrocarbon portion thereof ranges from about 15 to 70 weight percent thereof.
Claim 15
Dependent Claim
14 words
The product of claim 1 wherein said substrate member is composed substantially of cellulose.
Claim 16
Dependent Claim
17 words
The product of claim 1 wherein said substrate member has an ash content under 0.5 weight percent.
Claim 17
Dependent Claim
18 words
A product of claim 1 which has a volatile level of less than about 8 percent by weight.
Claim 18
Dependent Claim
24 words
A product of claim 1 which is advanced to an extent such that it has a flow of from about 3 to 20 percent.
Claim 19
Dependent Claim
14 words
A product of claim 1 which is less than about 10 mils in thickness.
Claim 20
Dependent Claim
10 words
A product of claim 1 which is substantially completely thermoset.
References Cited (Backward Citations)
US2751422A
Cited
US2864868A
Cited
US2385787A
Cited
US2423415A
Cited
US2388583A
Cited
US2656335A
Cited
US2831821A
Cited
US2824860A
Cited
US3090700A
Cited
US3104174A
Cited
US3226251A
Cited
US3336398A
Cited
US3420915A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-24 | 1975-07-26 | 1976-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-24 | 1979-07-26 | 1980-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-24 | 1983-07-26 | 1984-01-25 | $7700.00 | Window Closed / Lapsed |