US4126597A
Expired / Lapsed
US
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Solutions of polyvinyl acetals
Assignee: SI Group Inc
•
Filing: 1977-03-21
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Granted: 1978-11-21
•
Expires: 1997-03-21
Abstract
Abstract Polyvinyl formal dissolved in a solvent comprising certain monoalkyl ethers of diethylene glycol and triethylene glycol or the monophenyl ether of ethylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol or propylene glycol. In some cases it is necessary to have a diluent such as an aromatic hydrocarbon present.
Inventors
- 👤 George A. Walrath
- 👤 John T. Keating
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:39
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/44; H01B3/446; C; C08; C08K; C08K5/00; C08K5/04; C08K5/06; C09; C09D; C09D129/00; C09D129/14; D; D06; D06P; D06P5/00; D06P5/003; D06P5/004; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294; Y10T428/31504; Y10T428/31678; Y10T428/31688
Claims Analysis
Total Claims: 60
Claim 1
Independent Claim
159 words
A solution containing at least 20% polyvinyl formal in a solvent comprising (1) a glycol ether of the formula R.sub.1 O(C.sub.2 H.sub.4 O).sub.x H (I) where R 1 is alkyl of 1 to 2 carbon atoms and x is 2 or 3, or R.sub.2 O(C.sub.n H.sub.2n O).sub.y H (II) where R 2 is phenyl, y is 1,2,3 or 4, and n is 2 or 3, with (2) a diluent in an amount of 5 to 90% when (1) has formula (I) and 0 to 90% when (1) has formula (II), the diluent being (a) selected from the group consisting of aromatic hydrocarbons, lower alkoxyethanol, lower alkoxyethyl acetate, lower alkyl acetate, lower alkanones, cyclohexanone, butoxyethoxyethanol and hexoxyethoxyethanol when (1) has formula (I) and the diluent being (a) or a lower alkanol or a compound of formula (I) when (1) has formula (II), the proportions of glycol ether and diluent being so regulated that a solution of the polyvinyl formal occurs.
Claim 2
Dependent Claim
159 words
A solution containing at least 20% polyvinyl formal in a solvent comprising (1) a glycol ether of the formula R.sub.1 O(C.sub.2 H.sub.4 O).sub.x H (I) where R 1 is alkyl of 1 to 2 carbon atoms and x is 2 or 3, or R.sub.2 O(C.sub.n H.sub.2n O).sub.y H (II) where R 2 is phenyl, y is 1,2,3 or 4, and n is 2 or 3, with (2) a diluent in an amount of 5 to 90% when (1) has formula (I) and 0 to 90% when (1) has formula (II), the diluent being (a) selected from the group consisting of aromatic hydrocarbons, lower alkoxyethanol, lower alkoxyethyl acetate, lower alkyl acetate, lower alkanones, cyclohexanone, butoxyethoxyethanol and hexoxyethoxyethanol when (1) has formula (I) and the diluent being (a) or a lower alkanol or a compound of formula (I) when (1) has formula (II), the proportions of glycol ether and diluent being so regulated that a solution of the polyvinyl formal occurs.
Claim 3
Dependent Claim
15 words
A solution according to claim 1 wherein the solution contains at least 30% polyvinyl formal.
Claim 4
Dependent Claim
15 words
A solution according to claim 2 wherein the solution contains 30 to 70% polyvinyl formal.
Claim 5
Dependent Claim
15 words
A solution according to claim 1 wherein the solution contains 25 to 35% polyvinyl formal.
Claim 6
Dependent Claim
15 words
A solution according to claim 4 wherein the solution contains 30 to 35% polyvinyl formal.
Claim 7
Dependent Claim
18 words
A solution according to claim 1 wherein the polyvinyl formal is soluble in the solvent at 25° C.
Claim 8
Dependent Claim
15 words
A solution according to claim 6 wherein the solution contains at least 25% polyvinyl formal.
Claim 9
Dependent Claim
15 words
A solution according to claim 7 wherein the solution contains 25 to 35% polyvinyl formal.
Claim 10
Dependent Claim
15 words
A solution according to claim 8 wherein the solution contains 30 to 35% polyvinyl formal.
Claim 11
Dependent Claim
18 words
A solution according to claim 1 wherein the polyvinyl formal is soluble in the solvent at 60° C.
Claim 12
Dependent Claim
15 words
A solution according to claim 10 wherein the solution contains at least 30% polyvinyl formal.
Claim 13
Dependent Claim
19 words
A solution according to claim 1 wherein the polyvinyl formal has a formal content of about 68 to 82%.
Claim 14
Dependent Claim
17 words
A solution according to claim 12 wherein the polyvinyl formal has a formal content of about 82%.
Claim 15
Dependent Claim
20 words
A solution according to claim 13 wherein the solvent consists of phenoxyethanol, phenoxyethoxyethanol or a mixture of phenoxyethanol and phenoxyethoxyethanol.
Claim 16
Dependent Claim
25 words
A solution according to claim 13 wherein the solvent comprises a compound of formula (I) and as the diluent, an aromatic hydrocarbon, acetone or cyclohexanone.
Claim 17
Dependent Claim
10 words
A solution according to claim 15 wherein x is 2.
Claim 18
Dependent Claim
49 words
A solution according to claim 15 wherein the solvent consists essentially of the compound of formula (I), at a portion of a compound of formula (I) has methyl for R 1 and an aromatic hydrocarbon diluent and wherein the polyvinyl formal is soluble in the solvent at 25° C.
Claim 19
Dependent Claim
15 words
A solution according to claim 17 wherein the solution contains 25 to 35% polyvinyl formal.
Claim 20
Dependent Claim
15 words
A solution according to claim 17 wherein the solution contains at least 30% polyvinyl formal.
Claim 21
Dependent Claim
22 words
A solution according to claim 19 wherein the aromatic hydrocarbon includes xylene or toluene in an amount sufficient to provide said solubility.
Claim 22
Dependent Claim
22 words
A solution according to claim 17 wherein the aromatic hydrocarbon includes xylene or toluene in an amount sufficient to provide said solubility.
Claim 23
Dependent Claim
14 words
A solution according to claim 17 wherein the compound of formula (I) is methoxyethoxyethanol.
Claim 24
Dependent Claim
19 words
A solution according to claim 17 wherein the compound of formula (I) is a mixture of methoxyethoxyethanol and ethoxyethoxyethanol.
Claim 25
Dependent Claim
37 words
A solution according to claim 17 wherein there is also present as an additional diluent butoxyethoxyethanol, hexoxyethoxyethoxyethanol or methoxypropoxypropanol, the additional diluent being present in an amount insufficient to render the polyvinyl formal insoluble at 60° C.
Claim 26
Dependent Claim
17 words
A solution according to claim 17 wherein the diluent includes aromatic hydrocarbon boiling point at 315°-350° F.
Claim 27
Dependent Claim
35 words
A solution according to claim 17 wherein there is also present in the diluent xylene or toluene as an additional aromatic hydrocarbon in an amount sufficient to render the polyvinyl formal soluble at 25° C.
Claim 28
Dependent Claim
27 words
A solution according to claim 26 wherein there is present in the diluent xylene in an amount sufficient to render the polyvinyl formal soluble at 25° C.
Claim 29
Dependent Claim
34 words
A solution according to claim 27 wherein the concentration of polyvinyl formal is 25 to 35% and the xylene is present in an amount sufficient to render the polyvinyl formal soluble at 25° C.
Claim 30
Dependent Claim
34 words
A solution according to claim 27 wherein the concentration of polyvinyl formal is at least 30% and the xylene is present in an amount sufficient to render the polyvinyl formal soluble at 25° C.
Claim 31
Dependent Claim
25 words
A solution according to claim 29 wherein the solvent consists of 60% of a compound of formula (I) and 40% of said aromatic hydrocarbon diluent.
Claim 32
Dependent Claim
31 words
A solution according to claim 30 wherein the solvent consists of 60% of a compound of formula (I), 20% of said aromatic hydrocarbon diluent boiling at 315°-350° F and 20% xylene.
Claim 33
Dependent Claim
25 words
A solution according to claim 28 wherein the solvent consists of 60% of a compound of formula (I) and 40% of said aromatic hydrocarbon diluent.
Claim 34
Dependent Claim
31 words
A solution according to claim 32 wherein the solvent consists of 60% of a compound of formula (I), 20% of said aromatic hydrocarbon diluent boiling at 315°-350° F and 20% xylene.
Claim 35
Dependent Claim
57 words
A solution according to claim 13 wherein the solvent includes a compound of formula (II) and as a diluent a compound of formula I, butoxyethoxythanol, hexoxyethoxyethanol or an alkyl alcohol having 1 to 3 carbon atoms in the alkyl group, said diluent being present in an amount insufficient to render the polyvinyl formal insoluble at 60° C.
Claim 36
Dependent Claim
15 words
A solution according to claim 34 wherein the diluent is a compound of formula (I).
Claim 37
Dependent Claim
10 words
A solution according to claim 13 containing a phenol-formaldehyde resin.
Claim 38
Dependent Claim
20 words
A solution according to claim 1 wherein the solvent consists of phenoxyethanol, phenoxyethoxyethanol or a mixture of phenoxyethanol and phenoxyethoxyethanol.
Claim 39
Dependent Claim
25 words
A solution according to claim 1 wherein the solvent comprises a compound of formula (I) and as the diluent, an aromatic hydrocarbon, acetone or cyclohexanone.
Claim 40
Dependent Claim
10 words
A solution according to claim 38 wherein x is 2.
Claim 41
Dependent Claim
48 words
A solution according to claim 38 wherein the solvent consists essentially of the compound of formula (I), at a portion of compound of formula (I) has methyl for R 1 and an aromatic hydrocarbon diluent and wherein the polyvinyl formal is soluble in the solvent at 25° C.
Claim 42
Dependent Claim
15 words
A solution according to claim 40 wherein the solution contains 25 to 35% polyvinyl formal.
Claim 43
Dependent Claim
15 words
A solution according to claim 40 wherein the solution contains at least 30% polyvinyl formal.
Claim 44
Dependent Claim
22 words
A solution according to claim 42 wherein the aromatic hydrocarbon includes xylene or toluene in an amount sufficient to provide said solubility.
Claim 45
Dependent Claim
22 words
A solution according to claim 40 wherein the aromatic hydrocarbon includes xylene or toluene in an amount sufficient to provide said solubility.
Claim 46
Dependent Claim
14 words
A solution according to claim 40 wherein the compound of formula (I) is methoxyethoxyethanol.
Claim 47
Dependent Claim
19 words
A solution according to claim 40 wherein the compound of formula (I) is a mixture of methoxyethoxyethanol and ethoxyethoxyethanol.
Claim 48
Dependent Claim
17 words
A solution according to claim 40 wherein the diluent includes aromatic hydrocarbon boiling point at 315°-350° F.
Claim 49
Dependent Claim
35 words
A solution according to claim 40 wherein there is also present in the diluent xylene or toluene as an additional aromatic hydrocarbon in an amount sufficient to render the polyvinyl formal soluble at 25° C.
Claim 50
Dependent Claim
27 words
A solution according to claim 48 wherein there is present in the diluent xylene in an amount sufficient to render the polyvinyl formal soluble at 25° C.
Claim 51
Dependent Claim
34 words
A solution according to claim 49 wherein the concentration of polyvinyl formal is 25 to 35% and the xylene is present in an amount sufficient to render the polyvinyl formal soluble at 25° C.
Claim 52
Dependent Claim
34 words
A solution according to claim 50 wherein the concentration of polyvinyl formal is at least 30% and the xylene is present in an amount sufficient to render the polyvinyl formal soluble at 25° C.
Claim 53
Dependent Claim
25 words
A solution according to claim 51 wherein the solvent consists of 60% of a compound of formula (I) and 40% of said aromatic hydrocarbon diluent.
Claim 54
Dependent Claim
31 words
A solution according to claim 52 wherein the solvent consists of 60% of a compound of formula (I), 20% of said aromatic hydrocarbon diluent boiling at 315°-350° F and 20% xylene.
Claim 55
Dependent Claim
57 words
A solution according to claim 1 wherein the solvent includes a compound of formula (II) and as a diluent a compound of formula (I), butoxyethoxyethanol, hexoxyethoxyethanol or an alkyl alcohol having 1 to 3 carbon atoms in the alkyl group, said diluent being present in an amount insufficient to render the polyvinyl formal insoluble at 60° C.
Claim 56
Dependent Claim
15 words
A solution according to claim 54 wherein the diluent is a compound of formula (I).
Claim 57
Dependent Claim
10 words
A solution according to claim 1 containing a phenol-formaldehyde resin.
Claim 58
Dependent Claim
16 words
A solution according to claim 13 wherein the solvent consists of the solvent of formula (II).
Claim 59
Dependent Claim
18 words
A solution according to claim 57 wherein the solvent is phenoxyethoxyethoxyethoxyethanol or the monophenyl ether of propylene glycol.
Claim 60
Dependent Claim
16 words
A solution according to claim 1 wherein the solvent consists of a solvent of formula (II).
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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) | 1981-11-20 | 1982-05-22 | 1982-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-20 | 1986-05-22 | 1986-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-20 | 1990-05-22 | 1990-11-21 | $7700.00 | Window Closed / Lapsed |