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US5527624A
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Process for preparing sintered shapes and compositions used therein
Assignee: Lubrizol Corp
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Filing: 1995-04-05
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Granted: 1996-06-18
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Expires: 2015-04-05
Abstract
Abstract The invention relates to a process for preparing sintered shapes, comprising the steps of: (1) forming a green body from a mixture comprising a major amount of at least one inorganic powder; and one or more additives selected from the group consisting of: (A) at least one reaction product of a hydroxy compound with a carboxylic acylating agent; (B) at least one Mannich reaction product; (C) at least one hydrocarbyl-substituted amine; (D) at least one aminophenol; (E) at least one reaction product of a nitrophenol and amino compound; (F) at least one basic nitrogen-containing polymer; (G) at least one carboxylic acylating agent; (H) at least one aromatic acid or derivative thereof; (I) at least one aromatic oxime; and (J) at least one overbased or gelled overbased metal salt of an acidic organic compound provided that when the carboxylic acylating agent is a hydrocarbyl-substituted carboxylic acylating agent and the hydrocarbyl group contains less than an average of 40 carbon atoms, then the carboxylic acylating agent is a polycarboxylic acylating agent; and (2) sintering the body. Sintered shapes made from the compositions of the present invention have relatively high fired densities and grain sizes; and relatively low pore volume.
Inventors
- 👤 William Higgins
- 👤 Fred E. Heller
- 👤 Reed H. Walsh
- 👤 Ralph E. Kornbrekke
- 👤 Stephen A. DiBiase
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:58
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/622; C04B35/626; C04B35/63; C04B35/632; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/31938
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
182 words
A method for preparing sintered shapes, comprising the steps of: (1) forming a green body from a mixture comprising a major amount of at least one inorganic powder; and one or more additives selected from the group consisting of: (A) at least one reaction product of a hydroxy compound with a carboxylic acylating agent; (B) at least one Mannich reaction product; (C) at least one hydrocarbyl-substituted amine; (D) at least one aminophenol; (E) at least one reaction product of a nitrophenol and amino compound; (F) at least one basic nitrogen-containing polymer; (G) a substituted carboxylic acylating agent formed by the reaction of a carboxylic acylating agent and a polymeric material; (H) at least one aromatic acid or derivative thereof; (I) at least one aromatic oxime; and (J) at least one overbased or gelled overbased metal salt of an acidic organic compound provided that when the carboxylic acylating agent is a hydrocarbyl-substituted carboxylic acylating agent and the hydrocarbyl group contains less than an average of 40 carbon atoms, then the carboxylic acylating agent is a polycarboxylic acylating agent; and (2) sintering the body.
Claim 2
Independent Claim
182 words
A method for preparing sintered shapes, comprising the steps of: (1) forming a green body from a mixture comprising a major amount of at least one inorganic powder; and one or more additives selected from the group consisting of: (A) at least one reaction product of a hydroxy compound with a carboxylic acylating agent; (B) at least one Mannich reaction product; (C) at least one hydrocarbyl-substituted amine; (D) at least one aminophenol; (E) at least one reaction product of a nitrophenol and amino compound; (F) at least one basic nitrogen-containing polymer; (G) a substituted carboxylic acylating agent formed by the reaction of a carboxylic acylating agent and a polymeric material; (H) at least one aromatic acid or derivative thereof; (I) at least one aromatic oxime; and (J) at least one overbased or gelled overbased metal salt of an acidic organic compound provided that when the carboxylic acylating agent is a hydrocarbyl-substituted carboxylic acylating agent and the hydrocarbyl group contains less than an average of 40 carbon atoms, then the carboxylic acylating agent is a polycarboxylic acylating agent; and (2) sintering the body.
Claim 3
Dependent Claim
22 words
The method of claim 1, wherein the additive is the reaction product (A) and the acylating agent is a succinic acylating agent.
Claim 4
Dependent Claim
45 words
The method of claim 1, wherein the additive is the reaction product (A) and the carboxylic acylating agent is a hydrocarbyl-substituted succinic acylating agent wherein the hydrocarbyl group is derived from a polyalkene having a number average molecular weight from about 600 to about 5000.
Claim 5
Dependent Claim
41 words
The method of claim 1, wherein the additive is the reaction product (A) and the carboxylic acylating agent is a carboxylic acylating agent prepared by polymerizing an alkenyl aromatic monomer or olefin with an alphabeta unsaturated carboxylic acid or derivative thereof.
Claim 6
Dependent Claim
18 words
The method of claim 4, wherein the carboxylic acylating agent is a copolymer of styrene and maleic anhydride.
Claim 7
Dependent Claim
39 words
The method of claim 1, wherein the additive is the reaction product (A) and the carboxylic acylating agent is a carboxylic acylating agent prepared by polymerizing an olefin having from 2 to about 30 carbon atoms with maleic anhydride.
Claim 8
Dependent Claim
36 words
The method of claim 1, wherein the additive is the reaction product (A) and the carboxylic acylating agent is a carboxylic acylating agent prepared by grafting an unsaturated carboxylic acid or derivative onto a hydrocarbon polymer.
Claim 9
Dependent Claim
18 words
The method of claim 7, wherein the hydrocarbon polymer is a hydrogenated styrene-isoprene or a hydrogenated styrene-butadiene polymer.
Claim 10
Dependent Claim
36 words
The method of claim 1, wherein the additive is the reaction product (A) and the hydroxy compound is an alcohol having from 2 to about 40 carbon atoms and from 1 to about 10 hydroxyl groups.
Claim 11
Dependent Claim
29 words
The method of claim 1, wherein the additive is the reaction product (A) and the hydroxy compound is a pentaerythritol, a glycerol, a propylene glycol or an ethylene glycol.
Claim 12
Dependent Claim
33 words
The method of claim 1, wherein the additive is a Mannich reaction product (B) prepared by reacting at least one hydrocarbyl-substituted hydroxyaromatic compound with at least one aldehyde and at least one amine.
Claim 13
Dependent Claim
24 words
The method of claim 1, wherein the additive is a hydrocarbyl-substituted amine (C) prepared by reacting a polyalkene or chlorinated polyalkene with an amine.
Claim 14
Dependent Claim
24 words
The method of claim 1, wherein the additive is an aminophenol (D) or the reaction product (E) of a nitrophenol and an amino compound.
Claim 15
Dependent Claim
36 words
The method of claim 13, wherein the carboxylic acylating agent is a hydrocarbyl-substituted carboxylic acylating agent having a hydrocarbyl group derived from a polyalkene having a number average molecular weight from about 600 to about 5000.
Claim 16
Dependent Claim
28 words
The method of claim 14, wherein the carboxylic acylating agent prepared by polymerizing an alkenyl aromatic monomer or olefin with an alpha-beta unsaturated carboxylic acid or derivative thereof.
Claim 17
Dependent Claim
18 words
The method of claim 14, wherein the carboxylic acylating agent is a copolymer of styrene and maleic anhydride.
Claim 18
Dependent Claim
26 words
The method of claim 14, wherein the acylating agent is a interpolymer of an olefin having from 2 to about 30 carbon atoms and maleic anhydride.
Claim 19
Dependent Claim
25 words
The method of claim 14, wherein the carboxylic acylating agent is prepared by grafting an unsaturated carboxylic acid or derivative thereof onto a hydrocarbon polymer.
Claim 20
Dependent Claim
18 words
The method of claim 18, wherein the hydrocarbon polymer is a hydrogenated styrene-isoprene or a hydrogenated styrene-butadiene polymer.
Claim 21
Dependent Claim
16 words
The method of claim 1, wherein the additive is an aromatic acid or derivative thereof (H).
Claim 22
Dependent Claim
20 words
The method of claim 20, wherein the aromatic acid or derivative thereof (H) is a salicylic acid or derivative thereof.
Claim 23
Dependent Claim
13 words
The method of claim 1, wherein the additive is an aromatic oxime (I).
Claim 24
Dependent Claim
34 words
The method of claim 1, wherein the additive is (J) an overbased metal salt or at least one gelled overbased metal salt of a sulfonic acid, carboxylic acid, phosphorus acid, phenol or mixtures thereof.
Claim 25
Dependent Claim
27 words
The method of claim 23, wherein the overbased metal salt or gelled overbased metal salt is a boron-containing overbased metal salt or boron-containing gelled overbased metal salt.
Claim 26
Dependent Claim
26 words
The method of claim 1, wherein the additive is present in an amount from about 0.05% to about 30% by weight based on the inorganic powder.
Claim 27
Dependent Claim
13 words
The method of claim 1, wherein the mixture of step (1) includes water.
Claim 28
Dependent Claim
16 words
The method of claim 1, wherein step (2) further comprises removing volatile material from the shape.
Claim 29
Independent Claim
146 words
A method for preparing sintered shapes, comprising the steps of: (1) forming a green body from a mixture comprising a major amount of at least one inorganic powder; and from 0.5 to 30% by weight based on the inorganic powder of one or more additives selected from the group consisting of: (A) at least one reaction product of a hydroxy compound with a polycarboyxlic acylating agent, (B) at least one Mannich reaction product; (C) at least one hydrocarbyl-substituted amine; (D) at least one aminophenol; (E) at least one reaction product of a nitrophenol and amino compound; (F) at least one basic nitrogen-containing polymer; (G) at least one polycarboxylic acylating agent; (H) at least one aromatic acid or derivative thereof; (I) at least one aromatic oxime; and (J) at least one overbased or gelled overbased metal salt of an acidic organic compound; and (2) sintering the body.
Claim 30
Independent Claim
146 words
A method for preparing sintered shapes, comprising the steps of: (1) forming a green body from a mixture comprising a major amount of at least one inorganic powder; and from 0.5 to 30% by weight based on the inorganic powder of one or more additives selected from the group consisting of: (A) at least one reaction product of a hydroxy compound with a polycarboyxlic acylating agent, (B) at least one Mannich reaction product; (C) at least one hydrocarbyl-substituted amine; (D) at least one aminophenol; (E) at least one reaction product of a nitrophenol and amino compound; (F) at least one basic nitrogen-containing polymer; (G) at least one polycarboxylic acylating agent; (H) at least one aromatic acid or derivative thereof; (I) at least one aromatic oxime; and (J) at least one overbased or gelled overbased metal salt of an acidic organic compound; and (2) sintering the body.
Claim 31
Dependent Claim
153 words
An article, comprising: a green body comprising a major amount of at least one inorganic powder; and one or more additives selected from the group consisting of (A) at least one reaction product of a hydroxy compound with a carboxylic acylating agent; (B) at least one Mannich reaction product; (C) at least one hydrocarbyl-substituted amine; (D) at least one aminophenol; (E) at least one reaction product of a nitrophenol and amino compound; (F) at least one basic nitrogen-containing polymer; (G) at least one carboxylic acylating agent; (H) at least one aromatic acid or derivative thereof; (I) at least one aromatic oxime; and (J) at least one overbased or gelled overbased metal salt of an acidic organic compound provided that when the carboxylic acylating agent is a hydrocarbyl-substituted carboxylic acylating agent and the hydrocarbyl group contains less than an average of 40 carbon atoms, then the carboxylic acylating agent is a polycarboxylic acylating agent.
Claim 32
Dependent Claim
153 words
An article, comprising: a green body comprising a major amount of at least one inorganic powder; and one or more additives selected from the group consisting of (A) at least one reaction product of a hydroxy compound with a carboxylic acylating agent; (B) at least one Mannich reaction product; (C) at least one hydrocarbyl-substituted amine; (D) at least one aminophenol; (E) at least one reaction product of a nitrophenol and amino compound; (F) at least one basic nitrogen-containing polymer; (G) at least one carboxylic acylating agent; (H) at least one aromatic acid or derivative thereof; (I) at least one aromatic oxime; and (J) at least one overbased or gelled overbased metal salt of an acidic organic compound provided that when the carboxylic acylating agent is a hydrocarbyl-substituted carboxylic acylating agent and the hydrocarbyl group contains less than an average of 40 carbon atoms, then the carboxylic acylating agent is a polycarboxylic acylating agent.
Claim 33
Dependent Claim
10 words
A sintered shape prepared by the method of claim 1.
References Cited (Backward Citations)
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1999-06-18 | 1999-12-18 | 2000-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-06-18 | 2003-12-18 | 2004-06-18 | $3760.00 | Window Closed / Lapsed |
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