US5389447A
Expired / Lapsed
US
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Polymers of 2,2-disubstituted-3-hydroxypropionic acid for ceramic processing
Assignee: EIDP Inc
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Filing: 1989-06-20
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Granted: 1995-02-14
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Expires: 2009-06-20
Abstract
Abstract Polymers of 2,2-disubstituted-3-hydroxypropionic acid, e.g., polymers of β-propiolactone, are employed in ceramic compositions as binders or dispersing agents.
Inventors
- 👤 Roe C. Blume
- 👤 Lewis E. Manring
- 👤 William G. Peet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:10
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/622; C04B35/626; C04B35/63; C04B35/632; C04B35/634; C04B35/63448; C04B35/6346; C07; C07C; C07C59/00; C07C59/01; C08; C08G; C08G63/00; C08G63/02; C08G63/06; C08G63/08; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31786
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
80 words
A binder composition consisting essentially of a mixture of at least two polymers of a 3-hydroxypropionic acid disubstituted at the 2-position by alkyl or hydrocarbon aryl or both, said composition having a glass transition temperature in the range of -30° C. to -40° C. being substantially to completely amorphous, displaying no crystalline exotherm in differential scanning calorimetry in a temperature range of -100° C. to +150° C. and volatilizing substantially cleanly at below 400° C. leaving a low carbon residue.
Claim 2
Dependent Claim
80 words
A binder composition consisting essentially of a mixture of at least two polymers of a 3-hydroxypropionic acid disubstituted at the 2-position by alkyl or hydrocarbon aryl or both, said composition having a glass transition temperature in the range of -30° C. to -40° C. being substantially to completely amorphous, displaying no crystalline exotherm in differential scanning calorimetry in a temperature range of -100° C. to +150° C. and volatilizing substantially cleanly at below 400° C. leaving a low carbon residue.
Claim 3
Dependent Claim
10 words
A binder composition according to claim 1, being completely amorphous.
Claim 4
Dependent Claim
19 words
A binder composition according to claim 1, consisting essentially of at least one copolymer of the disubstituted 3-hydroxypropionic acid.
Claim 5
Dependent Claim
16 words
A solution comprising an organic solvent having dissolved therein a binder composition according to claim 1.
Claim 6
Dependent Claim
17 words
A composition according to claim 1, consisting essentially of a plasticizer which is other than said polymers.
Claim 7
Dependent Claim
21 words
A slip composition comprising a solvent, particulate ceramic material, and dissolved in said solvent a binder composition according to claim 1.
Claim 8
Dependent Claim
36 words
A binder composition according to claim 1, wherein said mixture of polymers comprises different recurring units of ##STR2## wherein: R 1 is C 1-4 -alkyl or phenyl; and R 2 is C 1-5 -alkyl or phenyl.
Claim 9
Dependent Claim
13 words
A composition according to claim 7, wherein R 2 is n-propyl or neopentyl.
Claim 10
Dependent Claim
41 words
A binder composition according to claim 7, comprising a mixture of said polymers, at least one being an oligomer having an average molecular weight of less than 5,000 and at least one having an average molecular weight of at least 10,000.
Claim 11
Dependent Claim
18 words
A binder composition according to claim 7, wherein said mixture of polymers is a methyl propyl/methyl-neopentyl/methyl ethyl terpolymer.
Claim 12
Dependent Claim
20 words
A binder composition according to claim 7, wherein said mixture of polymers is terminated by a deprotonated carboxylic terminal group.
Claim 13
Dependent Claim
16 words
A binder composition according to claim 11, wherein said deprotonated carboxylic terminal group is tetrabutyl phosphonium.
Claim 14
Dependent Claim
61 words
A copolymer of different recurring units of --(CH 2 CR 1 R 2 COO)--, wherein R 1 is C 1-4 -alkyl or phenyl and R 2 is C 1-5 -alkyl or phenyl, said copolymer exhibiting no crystalline exotherm in differential scanning caloimetry in a temperature range of -100° C. to +150° C., and a glass transition temperature of below 40° C.
Claim 15
Dependent Claim
61 words
A copolymer of different recurring units of --(CH 2 CR 1 R 2 COO)--, wherein R 1 is C 1-4 -alkyl or phenyl and R 2 is C 1-5 -alkyl or phenyl, said copolymer exhibiting no crystalline exotherm in differential scanning caloimetry in a temperature range of -100° C. to +150° C., and a glass transition temperature of below 40° C.
Claim 16
Dependent Claim
16 words
A copolymer according to claim 13, wherein said copolymer is a methyl propyl/methyl neopentyl/methyl ethyl terpolymer.
Claim 17
Dependent Claim
56 words
A ceramic slip or paste composition comprising particulate ceramic material, a solvent, a non-polylactone binder and an amount of a polymer sufficient to improve slip dispersion of said composition, said polymer comprising recurring units of the formula: ##STR3## wherein: R 1 is C 1-4 -alkyl or phenyl; and R 2 is C 1-5 -alkyl or phenyl.
Claim 18
Dependent Claim
56 words
A ceramic slip or paste composition comprising particulate ceramic material, a solvent, a non-polylactone binder and an amount of a polymer sufficient to improve slip dispersion of said composition, said polymer comprising recurring units of the formula: ##STR3## wherein: R 1 is C 1-4 -alkyl or phenyl; and R 2 is C 1-5 -alkyl or phenyl.
Claim 19
Dependent Claim
62 words
A ceramic composition comprising particulate ceramic material and a binder composition consisting essentially of a polymer of a 3-hydroxypropionic acid disubstituted at the 2-position by alkyl or hydrocarbon aryl or both, said binder having a glass transition temperature of -30° C. to +40° C., being substantially to completely amorphous, and volatilizing substantially cleanly at below 400° C., leaving a low carbon residue.
Claim 20
Dependent Claim
62 words
A ceramic composition comprising particulate ceramic material and a binder composition consisting essentially of a polymer of a 3-hydroxypropionic acid disubstituted at the 2-position by alkyl or hydrocarbon aryl or both, said binder having a glass transition temperature of -30° C. to +40° C., being substantially to completely amorphous, and volatilizing substantially cleanly at below 400° C., leaving a low carbon residue.
Claim 21
Dependent Claim
20 words
A shaped ceramic article of a composition of claim 16, wherein the ceramic article is in the unfired, green form.
Claim 22
Dependent Claim
14 words
A shaped article according to claim 17, wherein the shape is a ceramic tape.
Claim 23
Dependent Claim
13 words
An article of manufacture comprising the tape of claim 18 on a substrate.
Claim 24
Dependent Claim
9 words
A compound which is 2-methyl-2-neopentyl-3-acetoxypropionic acid or 2-methyl-2-neopentyl-3-hydroxypropionic acid.
Claim 25
Dependent Claim
9 words
A compound which is 2-methyl-2-neopentyl-3-acetoxypropionic acid or 2-methyl-2-neopentyl-3-hydroxypropionic acid.
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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) | 1998-02-13 | 1998-08-15 | 1999-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-02-13 | 2002-08-15 | 2003-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-02-13 | 2006-08-15 | 2007-02-14 | $7700.00 | Window Closed / Lapsed |