US4013629A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Art of catalyzing the reaction between a polyol and a polyaldehyde
Assignee: Krause Milling Co
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Filing: 1975-02-21
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Granted: 1977-03-22
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Expires: 1995-02-21
Abstract
Abstract An inorganic alkali halide is employed in a binder system to catalyze the reaction between glyoxal and polyhydroxyl compounds while permitting a controlled reaction rate and control of properties. The binder system has shown good utility as a foundry core binder.
Inventors
- 👤 Robert G. Cummisford
- 👤 Richard J. Wasielewski
- 👤 Robert K. Krueger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:48
CPC Classifications
C; C08; C08L; C08L3/00; C08L3/02; B; B22; B22C; B22C1/00; B22C1/16; B22C1/20; B22C1/22; B22C1/2233; B22C1/2246; B22C1/26; C08B; C08B31/00; C08B37/00; C08G; C08G4/00; C08K; C08K3/00; C08K3/16; C08K3/34; C08L1/00; C08L1/02; C08L5/00; C08L97/00; C08L97/02
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
92 words
In the modification of a polyol with a polyaldehyde, the improvement comprising the step of controlling, by accelerating or retarding the rate of the crosslinking reaction in a liquid solvent by the use of an inorganic alkali halide as a catalyst at such a temperature and pressure relationship as to maintain said liquid condition during the reaction, the polyol and polyaldehyde being of a type which would react in the absence of an alkali halide catalyst and being of a type which are mutually solvated in a solvent for the alkali halide.
Claim 2
Dependent Claim
92 words
In the modification of a polyol with a polyaldehyde, the improvement comprising the step of controlling, by accelerating or retarding the rate of the crosslinking reaction in a liquid solvent by the use of an inorganic alkali halide as a catalyst at such a temperature and pressure relationship as to maintain said liquid condition during the reaction, the polyol and polyaldehyde being of a type which would react in the absence of an alkali halide catalyst and being of a type which are mutually solvated in a solvent for the alkali halide.
Claim 3
Dependent Claim
23 words
The method of claim 1 wherein the alkali halide is selected from the group comprising KCl, KBr, KI, NaCl, NaBr, NaI, NaF, LiCl.
Claim 4
Dependent Claim
14 words
The method of claim 1 wherein the alkali halide is an NH 4 halide.
Claim 5
Dependent Claim
14 words
The method of claim 3 wherein the NH 4 halide is NH 4 Cl.
Claim 6
Dependent Claim
14 words
The method of claim 1 wherein the polyol is a saccharide or saccharide-containing substance.
Claim 7
Dependent Claim
14 words
The method of claim 5 wherein the polyaldehyde is glyoxal or a polymer thereof.
Claim 8
Dependent Claim
12 words
The method of claim 5 wherein water is used as a solvent.
Claim 9
Dependent Claim
30 words
The method of claim 5 wherein the polyaldehyde has the following general formula OHC -- (CH.sub.2).sub.n -- CHO and wherein n is a whole number integer from 0 to 12.
Claim 10
Dependent Claim
12 words
The method of claim 6 wherein water is used as the solvent.
Claim 11
Dependent Claim
24 words
The method of claim 9 wherein the alkali halide is selected from the group comprising KCl, KBr, KI, NaF, NaCl, NaBr NaI, and LiCl.
Claim 12
Dependent Claim
11 words
The method of claim 7 wherein the halide is ammonium halide.
Claim 13
Dependent Claim
16 words
The method of claim 8 wherein the polyol saccharide is an amylaceous material or hydrolysate thereof.
Claim 14
Dependent Claim
23 words
The method of claim 7 wherein the polyol is selected from the group comprising hydrolyzed gelatinized corn starch, corn flour and sorghum flour.
Claim 15
Dependent Claim
34 words
The method of claim 13 wherein the polyol has an alkaline viscosity of less than 20 sec., when using a 1.3 g sample and less than 100 sec. when using a 5.2 g sample.
Claim 16
Dependent Claim
33 words
The method claimed in claim 1 wherein the mole ratio of polyol to polyaldehyde is from 1:1 to 1:3 and the mole ratio of polyol to alkali halide is from 1:0.3 to 1:10.
Claim 17
Dependent Claim
36 words
The method claimed in claim 1 wherein the mole ratio of polyol to polyaldehyde is from 1:1 to 1:3 and the alkali halide which is present in the solvent phase is from 1.0 to 5.0 molal.
Claim 18
Dependent Claim
26 words
The method claimed in claim 9 wherein the ratio of the amount of saccharide as saccharide units to glyoxal as monomer is from 1:1 to 10:1.
Claim 19
Dependent Claim
27 words
The method claimed in claim 17 wherein the alkali halide is present in ratio with the saccharide units on a mole basis of from 2:1 to 1:10.
Claim 20
Dependent Claim
22 words
The method claimed in claim 18 where the amount of alkali halide present in the solvent is from 1.0 to 5.0 molal.
Claim 21
Dependent Claim
24 words
The method claimed in claim 9 wherein the amount of polyol to polyaldehyde is in the ratios of equivalent weights from 1:0.25 to 1:1.
Claim 22
Dependent Claim
13 words
The method claimed in claim 20 wherein water is used as a solvent.
Claim 23
Dependent Claim
27 words
The method claimed in claim 20 wherein the alkali halide is present in an amount of at least 1 mole alkali halide per equivalent weight of polyol.
Claim 24
Dependent Claim
22 words
The method claimed in claim 21 wherein the alkali halide is present in at least 1 mole per equivalent weight of polyol.
Claim 25
Dependent Claim
33 words
The method claimed in claim 7 which includes the step of using one of the group comprising KCl or NaCl and mixtures thereof to control the rate of reaction between glyoxal and saccharide.
Claim 26
Dependent Claim
21 words
The method claimed in claim 24 wherein the saccharide is selected from the group comprising maltose, sucrose, dextrose and glyco protein.
Claim 27
Dependent Claim
41 words
The method claimed in claim 24 wherein the saccharide is a hydrolyzed gelatinized amylaceous material having a 1.3 gm sample alkaline viscosity of not more than 20 sec. and a 5.2 gm sample alkaline viscosity of not more than 100 seconds.
Claim 28
Dependent Claim
12 words
The method claimed in claim 24 wherein the saccharide-containing material is collagen.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-03-21 | 1980-09-20 | 1981-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-21 | 1984-09-20 | 1985-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-21 | 1988-09-20 | 1989-03-22 | $7700.00 | Window Closed / Lapsed |