US3640769A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of retarding fouling of a substrate surface
Assignee: Goodyear Tire and Rubber Co
•
Filing: 1969-08-01
•
Granted: 1972-02-08
•
Expires: 1989-08-01
Abstract
Abstract A method of retarding the fouling of a substrate surface and resulting deposits thereon, where the said fouling and deposits are formed by contacting the substrate surface in the presence of water and carbon dioxide with at least one of the amine compounds consisting of amine compounds having primary amino groups, secondary amino groups and primary and secondary amino groups, the method being characterized by treating the said surface and any resulting deposits thereon with at least one organic acid selected from aliphatic dicarboxylic acids having from two to 10 carbon atoms, tricarboxylic acids having six to 10 carbon atoms, alkanoic acids having from four to eight carbon atoms, unsaturated organic acids having three to eight carbon atoms and phenol. The method has particular utility in treating mold surfaces used for preparing polyurethane articles.
Inventors
- 👤 Larry H Watters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:44
CPC Classifications
B; B29; B29C; B29C33/00; B29C33/70; B29C33/56; B29C33/60
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
37 words
The method of claim 1 where the said organic acids are selected from oxalic, malonic, succinic, glutaric, adipic, pimelic, suberic, azelaic, sebacic, citric, acrylic, crotonic, maleic, fumaric, butanoic, pentanoic, hexanoic, heptanoic, octanoic, chloroacetic, dichloroacetic and trichloroacetic acids.
Claim 2
Dependent Claim
23 words
The method according to claim 2 where the said organic acids are selected from aliphatic dicarboxylic acids, unsaturated organic acids and alkanoic acids.
Claim 3
Dependent Claim
17 words
The method according to claim 1 where the said organic acid is mixed with an inert solvent.
Claim 4
Dependent Claim
108 words
A method according to claim 1 wherein the substituted methyl amine compound is selected from the group consisting of a compound having the structure and a compound prepared by reacting a substituted methyl amine compound of (1) with a compound selected from the group consisting of an aldehyde and a ketone, where R1, R2 and R3 are individually selected from the group consisting of (a) hydrogen radicals, alkyl, cycloalkyl, aryl, alkaryl, and aralkyl radicals, and (b) substituted alkyl, cycloalkyl, aryl, alkaryl, and aralkyl radicals where the substituents are selected from at least one of the group consisting of hydrogen, carbon, oxygen, sulfur, fluorine, chlorine, bromine, iodine and phosphorous.
Claim 5
Dependent Claim
23 words
A method according to claim 1 where the substituted methyl amine compound is a diamine having amino groups attached to nonbenzenoid carbon atoms.
Claim 6
Dependent Claim
61 words
A method according to claim 1 where the substituted methyl amine compound is selected from the group consisting of ethylene diamine, hexamethylene diamine and dimethyl hexamethylene diamine; isophorone diamine, 1,4-cyclohexane bis methylamine, 4, 4''-diamino-dicyclohexyl methane, meta xylene diamine, para-xylene diamine, tetrachloroparaxylene diamine, cyclobutane-1,2 bis methylamine, menthane diamine, imino bis propylamine, bis (amino propyl) piperazine, diethylene triamine, triethylene tetramine, and tetraethylene pentamine.
Claim 7
Dependent Claim
48 words
A method according to claim 7 where the solid substrate surface is selected from at least one of the group consisting of polyethylene, polypropylene, silicone rubber and release agent coated metals, cured millable gum silicone rubber, cured natural rubber, rubberlike polymers, thermoplastic polymeric materials, and thermoset polymeric materials.
Claim 8
Dependent Claim
21 words
A method according to claim 8 where the substrate surface is a silicone rubber, and where the organic acid is concentrated.
Claim 9
Dependent Claim
64 words
A method according to claim 1 where the fouling and any deposits resulting therefrom are formed by contacting the substrate surface in the presence of water and carbon dioxide with a polyurethane reaction mixture, curing the reaction mixture, and removing the resulting cured polyurethane article from the substrate surface, where the polyurethane reaction mixture contains at least one of the substituted methyl amine compounds.
Claim 10
Dependent Claim
65 words
A method according to claim 10 where the substituted methyl amine compound is selected from at least one of the group consisting of ethylene diamine, hexamethylene diamine and dimethyl hexamethylene diamine; isophorone diamine, 1,4-cyclohexane bis methyl amine, 4,4''-diamino-dicyclohexyl methane, meta xylene diamine, para-xylene diamine, tetrachloroparaxylene diamine, cyclobutane-1,2 bis methylamine, menthane diamine, imino bis propylamine, bis (amino propyl) piperazine, diethylene triamine, triethylene tetramine, and tetraethylene pentamine.
Claim 11
Dependent Claim
48 words
A method according to claim 11 where the solid substrate surface is selected from at least one of the group consisting of polyethylene, polypropylene, silicone rubber, and release agent coated metals, cured millable gum silicone rubbers, cured natural rubber, rubberlike polymers, thermoplastic polymeric materials, and thermoset polymeric materials.
Claim 12
Dependent Claim
141 words
A method according to claim 12 where the substrate surface is a silicone rubber, where the organic acid is concentrated and where the said polyurethane reaction mixture is prepared from (a) at least one reactive hydrogen-containing polymeric material having a molecular weight between about 700 and about 5,000 selected from the group consisting of polyester polyols, polyester amides, polyether polyols, dihydroxyl-terminated polymer of conjugated diene hydrocarbons, and castor oil, (b) at least one organic polyisocyanate, the overall molar ratio of the isocyanate groups of the polyisocyanate to the reactive hydrogens of the hydrogen-containing polymeric material being between about 1.1/1 and about 12/1, and (c) at least one diamine having amino groups attached to nonbenzenoid carbon atoms in a ratio of from about 0.5/1 to about 1.5/1 of amine groups to the isocyanate groups in excess of the reactive hydrogen-containing polymeric material.
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) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |