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US3620902A
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Laminates prepared from c{11 {13 c{11 {11 substituted phenol-formaldehyde resins
Assignee: Monsanto Co
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Filing: 1968-06-21
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Granted: 1971-11-16
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Expires: 1988-06-21
Abstract
Abstract Laminates made from phenolic resin impregnated cellulosic substrates. The phenolic resin used is made from a substituted phenol and formaldehyde. The substituted phenol is made by reacting a specific C8 through C13 mixture of carbocyclic compounds. The product laminates have an improved combination of water absorption, solvent-resistance, heat-resistance, electrical properties, and physical properties.
Inventors
- 👤 George J Anderson
- 👤 Ronald H Dahms
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:39
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/22; B32B5/24; B32B5/26; C; C08; C08G; C08G8/00; C08G8/28; B32B27/00; B32B27/12; B32B5/02; B32B5/022; B32B5/024; B32B2260/00; B32B2260/02; B32B2260/021; B32B2260/04; B32B2260/046; B32B2307/00; B32B2307/30; B32B2307/306; B32B2307/70; B32B2307/718; B32B2307/726; B32B2309/00; B32B2309/08; B32B2309/10; B32B2309/105; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31971; Y10T428/31975; Y10T428/31978; Y10T428/31982; Y10T442/00; Y10T442/30; Y10T442/3472; Y10T442/3528; Y10T442/3569; Y10T442/3577
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
38 words
from about 5 through 70 weight percent (total mixture basis) of compounds each molecule of which has: a. the dicyclopentadiene nucleus, b. from 10 through 13 carbon atoms, c. as nuclear substituents from zero through three methyl groups,
Claim 2
Dependent Claim
22 words
being produced by reacting under aqueous liquid phase conditions formaldehyde and a substituted phenol mixture in the presence of a basic catalyst,
Claim 3
Dependent Claim
29 words
The laminate of claim 1 wherein said carbocyclic compound mixture comprises: A. from about 20 through 40 weight percent (total mixture basis) of compounds each molecule of which has:
Claim 4
Dependent Claim
6 words
from nine through 13 carbon atoms
Claim 5
Dependent Claim
6 words
from eight through 13 carbon atoms,
Claim 6
Dependent Claim
6 words
from 10 through 13 carbon atoms
Claim 7
Dependent Claim
27 words
as nuclear substituents from zero through three methyl groups, C. from about 30 through 65 weight percent (total mixture basis) of compounds each molecule of which has:
Claim 8
Dependent Claim
49 words
as substituents from zero through three groups selected from the class consisting of methyl and ethyl D. from about 0 through 5 weight percent divinyl benzene, E. provided that the sum total of all such compounds in any given said mixture of carbocyclic compounds is always 100 weight percent.
Claim 9
Dependent Claim
17 words
The laminate of claim 1 wherein each substrate member has an ash content under 0.5 weight percent.
Claim 10
Dependent Claim
27 words
as nuclear substituents from zero through four methyl groups, B. from about 15 through 30 weight percent (total mixture basis) of compounds each molecule of which has:
Claim 11
Dependent Claim
24 words
beIng substantially insoluble in water but having an acetone solubility such that a 55 weight percent solution thereof in acetone can be prepared, and
Claim 12
Dependent Claim
50 words
from about 15 through 65 weight percent (total mixture basis) of compounds each molecule of which has: a. a phenyl group substituted by a vinylidene group, b. from eight through 13 carbon atoms, c. as substituents from zero through three groups selected from the class consisting of methyl and ethyl,
Claim 13
Dependent Claim
9 words
from about 0 through 5 weight percent divinyl benzene,
Claim 14
Dependent Claim
73 words
having a free formaldehyde content which is less than about 5 weight percent, F. said substituted phenol mixture having been prepared by reacting phenol under Friedel-Crafts conditions with from about 10 to 80 parts by weight for each 100 parts by weight of said phenol of a mixture of carbocyclic compounds, G. said mixture of carbocyclic compounds comprising (on a 100 weight percent basis when in a form substantially free of other materials);
Claim 15
Dependent Claim
16 words
A laminate of claim 1 wherein each substrate member ranges from about 3 to 30 mils.
Claim 16
Dependent Claim
15 words
A laminate of claim 4 wherein each substrate member is under 10 mils in thickness.
Claim 17
Dependent Claim
22 words
provided that the sum total of all said compounds in any given such mixture of carbocyclic compounds is always 100 weight percent.
References Cited (Backward Citations)
US2163637A
Cited
US2423415A
Cited
US2388583A
Cited
US2827946A
Cited
US2824860A
Cited
US3013916A
Cited
US3248276A
Cited
US3429762A
Cited
US3448001A
Cited
US3420915A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-15 | 1975-05-17 | 1975-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-15 | 1979-05-17 | 1979-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-15 | 1983-05-17 | 1983-11-16 | $7700.00 | Window Closed / Lapsed |