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US4476193A
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Sulfur containing lignin modified alkaline earth treated phenolic impregnating resins for core layers of humidity resistant laminates
Assignee: General Electric Co
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Filing: 1982-09-14
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Granted: 1984-10-09
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Expires: 2002-09-14
Abstract
Abstract A resin containing laminate is made, where the resin comprises the cured admixture of phenolic resin, sulfur containing lignin, and a catalytic reactant containing 50 wt. % to 100 wt. % of an alkaline-earth compound and 0 wt. % to 50 wt. % of an alkali-metal compound.
Inventors
- 👤 Martin P. Seidel
- 👤 Timothy J. Fuller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:05
CPC Classifications
B; B32; B32B; B32B29/00; B32B29/002; B32B29/005; B32B27/00; B32B27/04; C; C08; C08L; C08L61/00; C08L61/04; C08L61/06; D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/46; D21H17/47; D21H17/48; D21H27/00; D21H27/18; D21H27/22; D21H27/26; D21H5/00; D21H5/0085; D21H5/0087; B32B2260/00; B32B2260/02; B32B2260/028; B32B2260/04; B32B2260/046; B32B2305/00; B32B2305/72; B32B2307/00; B32B2307/70; B32B2307/726; B32B2307/7265; B32B2317/00; B32B2317/12; B32B2317/122; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31942; Y10T428/31949; Y10T428/31964; Y10T428/31967; Y10T428/31971; Y10T428/31993
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
103 words
A moisture resistant, high pressure consolidated laminate, containing at least a core layer of a plurality of resin impregnated core sheets, the core impregnating resin comprising the cured admixture of: (A) phenol, (B) aldehyde, (C) sulfur containing lignin, and (D) an effective amount of catalytic reactant consisting essentially of: (i) 50 wt. % to 100 wt. % of an alkaline-earth metal compound selected from the group consisting of calcium oxide, calcium hydroxide, barium oxide, barium hydroxide, hydrates thereof, and mixtures thereof, and (ii) 0 wt. % to 50 wt. % of an alkali-metal compound, said core impregnating resin bonding the core sheets together.
Claim 2
Dependent Claim
103 words
A moisture resistant, high pressure consolidated laminate, containing at least a core layer of a plurality of resin impregnated core sheets, the core impregnating resin comprising the cured admixture of: (A) phenol, (B) aldehyde, (C) sulfur containing lignin, and (D) an effective amount of catalytic reactant consisting essentially of: (i) 50 wt. % to 100 wt. % of an alkaline-earth metal compound selected from the group consisting of calcium oxide, calcium hydroxide, barium oxide, barium hydroxide, hydrates thereof, and mixtures thereof, and (ii) 0 wt. % to 50 wt. % of an alkali-metal compound, said core impregnating resin bonding the core sheets together.
Claim 3
Dependent Claim
62 words
The laminate of claim 1, wherein the core impregnating resin is cured under pressure at a temperature of over about 130° C., the mole ratio of (phenol):(aldehyde) is from about (1):(1) to about (1):(1.6), the mole ratio of (phenol):(catalytic reactant) is from about (1):(0.002) to about (1):(0.05), and the weight ratio of (phenol):(sulfur containing lignin) is from about (1):(0.05) to about (1):(0.4).
Claim 4
Dependent Claim
167 words
A moisture resistant, high pressure consolidated laminate, containing at least a core layer of a plurality of resin impregnated core sheets, the core impregnating resin consisting essentially of the cured admixture of: (A) phenol, (B) formaldehyde, (C) sulfur containing lignin, and (D) catalytic reactant consisting essentially of: (i) 50 wt. % to 100 wt. % of an alkaline-earth metal compound selected from the group consisting of calcium oxide, calcium hydroxide, barium oxide, barium hydroxide, hydrates thereof, and mixtures thereof, and (ii) 0 wt. % to 50 wt. % of an alkali-metal compound, where the mole ratio of (phenol):(formaldehyde) is from about (1):(1) to about (1):(1.6), the weight ratio of (phenol):(sulfur containing lignin) is from about (1):(0.05) to about (1):(0.4), the catalytic reactant is added in an amount effective to provide a pH of the resin admixture of between about 7.5 and about 9.0, and the resin is cured under pressure at a temperature of over about 130° C., said core impregnating resin bonding the core sheets together.
Claim 5
Dependent Claim
167 words
A moisture resistant, high pressure consolidated laminate, containing at least a core layer of a plurality of resin impregnated core sheets, the core impregnating resin consisting essentially of the cured admixture of: (A) phenol, (B) formaldehyde, (C) sulfur containing lignin, and (D) catalytic reactant consisting essentially of: (i) 50 wt. % to 100 wt. % of an alkaline-earth metal compound selected from the group consisting of calcium oxide, calcium hydroxide, barium oxide, barium hydroxide, hydrates thereof, and mixtures thereof, and (ii) 0 wt. % to 50 wt. % of an alkali-metal compound, where the mole ratio of (phenol):(formaldehyde) is from about (1):(1) to about (1):(1.6), the weight ratio of (phenol):(sulfur containing lignin) is from about (1):(0.05) to about (1):(0.4), the catalytic reactant is added in an amount effective to provide a pH of the resin admixture of between about 7.5 and about 9.0, and the resin is cured under pressure at a temperature of over about 130° C., said core impregnating resin bonding the core sheets together.
Claim 6
Dependent Claim
19 words
The laminate of claim 3, where the mole ratio of (phenol):(catalytic reactant) is from about (1):(0.002) to about (1):(0.05).
Claim 7
Dependent Claim
25 words
The laminate of claim 3, where the catalytic reactant is selected from the group consisting of calcium hydroxide, barium hydroxide, hydrates thereof, and mixtures thereof.
Claim 8
Dependent Claim
17 words
The laminate of claim 3, where the core layer comprises a plurality of layers of Kraft paper.
Claim 9
Dependent Claim
12 words
The laminate of claim 6, having a print sheet layer laminated thereto.
Claim 10
Dependent Claim
21 words
The laminate of claim 1, where the alkali-metal compound of the catalytic reactant is selected from alkali-metal oxides and alkali-metal hydroxides.
Claim 11
Dependent Claim
25 words
The laminate of claim 1, where the catalytic reactant is selected from the group consisting of calcium hydroxide, barium hydroxide, hydrates thereof, and mixtures thereof.
Claim 12
Dependent Claim
21 words
The laminate of claim 3, where the alkali-metal compound of the catalytic reactant is selected from alkali-metal oxides and alkali-metal hydroxides.
References Cited (Backward Citations)
US4060450A
Cited
US3897589A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-10-09 | 1988-04-09 | 1988-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-09 | 1992-04-09 | 1992-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-09 | 1996-04-09 | 1996-10-09 | $7700.00 | Window Closed / Lapsed |