US5268233A
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Methods of preparing sintered shapes and green shapes used therein
Assignee: Lubrizol Corp
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Filing: 1991-11-22
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Granted: 1993-12-07
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Expires: 2011-11-22
Abstract
Abstract The invention relates to a method of preparing sintered shapes, comprising the steps of forming a green body from a mixture comprising (A) a major amount of at least one inorganic powder with (B) at least one reaction product of an amine other than an alkanolamine with a hydrocarbyl-substituted carboxylic acylating agent or alkylalkyleneglycolacetic acylating agent; provided the reaction product is other than an alkylene oxide treated fatty monocarboxylic amide and provided that when the hydrocarbyl-substituted carboxylic acylating agent is a nonaromatic acylating agent, then the hydrocarbyl group is other than hydrocarbyl groups having an average of about 55 to about 110 carbon atoms; and sintering the body. Sintered shapes made from the methods of the present invention have relatively high fired densities and small uniform grain sizes; and low porosity. The reaction products of the present invention help disperse the inorganic powder. These reaction products improve deagglomeration of the inorganic powder and help prevent reagglomeration of the powder.
Inventors
- 👤 Fred E. Heller
- 👤 William Higgins
- 👤 Robert E. Quinn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:42
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/45; C04B35/26; C04B35/2683; C04B35/515; C04B35/56; C04B35/565; C04B35/58; C04B35/581; C04B35/622; C04B35/626; C04B35/63; C04B35/632; C04B35/634; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/31938
Claims Analysis
Total Claims: 44
Claim 1
Independent Claim
106 words
A method of preparing sintered shapes, comprising the steps of: (1) forming a green body from a mixture comprising (A) a major amount of at least one inorganic powder with (B) at least one reaction product of an amine other than an alkanolamine with a hydrocarbyl-substituted carboxylic acylating agent or alkylalkyleneglycolacetic acylating agent; provided the reaction product is other than an alkylene oxide treated fatty monocarboxylic amide and provided that when the hydrocarbyl-substituted carboxylic acylating agent is a nonaromatic acylating agent, then the hydrocarbyl group is other than hydrocarbyl groups having an average of about 55 to about 110 carbon atoms; and (2) sintering the body.
Claim 2
Independent Claim
106 words
A method of preparing sintered shapes, comprising the steps of: (1) forming a green body from a mixture comprising (A) a major amount of at least one inorganic powder with (B) at least one reaction product of an amine other than an alkanolamine with a hydrocarbyl-substituted carboxylic acylating agent or alkylalkyleneglycolacetic acylating agent; provided the reaction product is other than an alkylene oxide treated fatty monocarboxylic amide and provided that when the hydrocarbyl-substituted carboxylic acylating agent is a nonaromatic acylating agent, then the hydrocarbyl group is other than hydrocarbyl groups having an average of about 55 to about 110 carbon atoms; and (2) sintering the body.
Claim 3
Dependent Claim
18 words
The method of claim 1, wherein the hydrocarbyl group contains from about 8 to about 50 carbon atoms.
Claim 4
Dependent Claim
21 words
The method of claim 1, wherein the hydrocarbyl group is derived from an olefin, olefin oligomer, olefin polymer or mixture thereof.
Claim 5
Dependent Claim
31 words
The method of claim 1, wherein the hydrocarbyl group is derived from one or more olefin selected from the group consisting of dodecene, tetradecene, pentadecene, hexadecene, heptadecene, octadecene and mixtures thereof.
Claim 6
Dependent Claim
20 words
The method of claim 1, wherein the hydrocarbyl group is derived from oligomers or polymers of ethylene, propylene or butylene.
Claim 7
Dependent Claim
16 words
The method of claim 1, wherein the hydrocarbyl group is a hexadecenyl group or tetrapropenyl group.
Claim 8
Dependent Claim
26 words
The method of claim 1, wherein the hydrocarbyl group is derived from a polyalkene having a number average molecular weight of about 1600 to about 3000.
Claim 9
Dependent Claim
57 words
The method of claim 1, wherein the acylating agent is a hydrocarbyl-substituted succinic acylating agent having a hydrocarbyl group derived from a polyalkene having a number average molecular weight from about 1600 to about 5000, a Mw/Mn ratio of 1.4 to 5 and contains an average of 1.3 to 4 succinic groups per equivalent of hydrocarbyl group.
Claim 10
Dependent Claim
11 words
The method of claim 1, wherein the amine is a polyamine.
Claim 11
Dependent Claim
12 words
The method of claim 1, wherein the amine is a polyalkylene polyamine.
Claim 12
Dependent Claim
17 words
The method of claim 1, wherein the reaction product (B) is further reacted with a boron compound.
Claim 13
Dependent Claim
13 words
The method of claim 1, wherein the powder (A) is a ceramic powder.
Claim 14
Dependent Claim
20 words
The method of claim 12, wherein the ceramic powder is alumina, aluminum nitride, silicon carbide, barium ferrite or copper oxide.
Claim 15
Dependent Claim
17 words
The method of claim 1, wherein the inorganic powder (A) is a metal or metal alloy powder.
Claim 16
Dependent Claim
28 words
The method of claim 1, wherein (B) the reaction product is present in an amount from about 0.05% to about 30% by weight based on the inorganic powder.
Claim 17
Dependent Claim
21 words
The method of claim 1, wherein the mixture further comprises a sintering amount of an overbased or gelled overbased metal salt.
Claim 18
Dependent Claim
19 words
The method of claim 1, wherein step (2) further comprises removing volatile materials from the shape prior to sintering.
Claim 19
Dependent Claim
11 words
The method of claim 1, wherein the mixture further comprises water.
Claim 20
Independent Claim
54 words
A method of preparing sintered shapes, comprising the steps of: (1) forming a green body from a mixture comprising (A) a major amount of at least one inorganic powder with (B) at least one reaction product of an amine other than an alkanolamine and an aromatic carboxylic acylating agent; and (2) sintering the body.
Claim 21
Independent Claim
54 words
A method of preparing sintered shapes, comprising the steps of: (1) forming a green body from a mixture comprising (A) a major amount of at least one inorganic powder with (B) at least one reaction product of an amine other than an alkanolamine and an aromatic carboxylic acylating agent; and (2) sintering the body.
Claim 22
Dependent Claim
19 words
The method of claim 19, wherein the aromatic carboxylic acylating agent is a salicylic, phthalic, or terphthalic acylating agent.
Claim 23
Dependent Claim
33 words
The method of claim 19, wherein the aromatic carboxylic acylating agent is substituted with a hydrocarbyl group derived from a polyalkene having a number average molecular weight of about 700 to about 5000.
Claim 24
Dependent Claim
28 words
The method of claim 19, wherein the aromatic carboxylic acylating agent is hydrocarbyl-substituted salicylic acylating agent with a hydrocarbyl group having from 8 to about 500 carbon atoms.
Claim 25
Dependent Claim
17 words
The method of claim 19, wherein the reaction product (B) is further reacted with a boron compound.
Claim 26
Dependent Claim
11 words
The method of claim 19, wherein the amine is a polyalkylenepolyamine.
Claim 27
Dependent Claim
17 words
The method of claim 19, wherein the mixture further comprises an overbased or gelled overbased metal salt.
Claim 28
Dependent Claim
16 words
The method of claim 25, wherein the salt is an alkaline earth metal sulfonate or carboxylate.
Claim 29
Dependent Claim
15 words
The method of claim 25, wherein the metal salt is a calcium or magnesium sulfonate.
Claim 30
Dependent Claim
19 words
The method of claim 19, wherein step (2) further comprises removing volatile materials form the shape prior to sintering.
Claim 31
Independent Claim
84 words
A method for preparing sintered shapes, comprising the steps of: (1) forming a green body from a mixture comprising (A) a major amount of at least one inorganic powder, and (B) from about 0.05% to about 30% by weight of at least one reaction product of a polyamine other than an alkanolamine and a hydrocarbyl-substituted carboxylic acylating agent provided that the hydrocarbyl group is other than hydrocarbyl groups having an average of about 55 to about 110 carbon atoms; and (2) sintering the body.
Claim 32
Independent Claim
84 words
A method for preparing sintered shapes, comprising the steps of: (1) forming a green body from a mixture comprising (A) a major amount of at least one inorganic powder, and (B) from about 0.05% to about 30% by weight of at least one reaction product of a polyamine other than an alkanolamine and a hydrocarbyl-substituted carboxylic acylating agent provided that the hydrocarbyl group is other than hydrocarbyl groups having an average of about 55 to about 110 carbon atoms; and (2) sintering the body.
Claim 33
Dependent Claim
20 words
The method of claim 29, wherein the hydrocarbyl group contains an average from about 12 to about 30 carbon atoms.
Claim 34
Dependent Claim
26 words
The method of claim 29, wherein the hydrocarbyl group is a dodecenyl, tetradecenyl, hexadecenyl, octadecenyl, propylene oligomer derived, ethylene oligomer derived or ethylene polymer derived group.
Claim 35
Dependent Claim
23 words
The method of claim 29, wherein the hydrocarbyl carboxylic acylating agent is a tetrapropenyl-substituted carboxylic acylating agent or a hexadecenyl-substituted carboxylic acylating agent.
Claim 36
Dependent Claim
56 words
The method of claim 29, wherein the acylating agent is a hydrocarbyl-substituted succinic acylating agent having a hydrocarbyl group derived from a polyalkene having a number average molecular weight from about 1600 to about 5000, a Mw/Mn ratio of 1.4 to 5 and an average of 1.3 to 4 succinic groups per equivalent of hydrocarbyl group.
Claim 37
Dependent Claim
12 words
The method of claim 29, wherein the amine is a polyalkylene polyamine.
Claim 38
Dependent Claim
13 words
The method of claim 29, wherein the powder (A) is a ceramic powder.
Claim 39
Dependent Claim
20 words
The method of claim 35, wherein the ceramic powder is alumina, aluminum nitride, silicon carbide, barium ferrite or copper oxide.
Claim 40
Dependent Claim
17 words
The method of claim 29, wherein the inorganic powder (A) is a metal or metal alloy powder.
Claim 41
Dependent Claim
19 words
The method of claim 29, wherein step (2) further comprises removing volatile material from the shape prior to sintering.
Claim 42
Dependent Claim
83 words
An article, comprising: a green body, comprising: (A) a major amount of at least one inorganic powder with (B) at least one reaction product of an amine other than an alkanolamine with a hydrocarbyl-substituted carboxylic acylating agent provided the reaction product is other than an alkylene oxide treated fatty monocarboxylic amide and provided that when the acylating agent is a nonaromatic acylating agent, then the hydrocarbyl group is other than hydrocarbyl groups having an average of about 55 to about 110 carbon atoms.
Claim 43
Dependent Claim
83 words
An article, comprising: a green body, comprising: (A) a major amount of at least one inorganic powder with (B) at least one reaction product of an amine other than an alkanolamine with a hydrocarbyl-substituted carboxylic acylating agent provided the reaction product is other than an alkylene oxide treated fatty monocarboxylic amide and provided that when the acylating agent is a nonaromatic acylating agent, then the hydrocarbyl group is other than hydrocarbyl groups having an average of about 55 to about 110 carbon atoms.
Claim 44
Dependent Claim
10 words
A sintered shape prepared by the method of claim 1.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1996-12-06 | 1997-06-07 | 1997-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-12-06 | 2001-06-07 | 2001-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-12-06 | 2005-06-07 | 2005-12-07 | $7700.00 | Window Closed / Lapsed |