Patent US3669911A successfully refreshed from Google Patents.
US3669911A
Expired / Lapsed
US
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Process and compositions for making porous low density thermoset resins from water-in-resin emulsions
Assignee: Dow Chemical Co
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Filing: 1969-09-26
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Granted: 1972-06-13
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Expires: 1989-09-26
Abstract
Abstract The difficulty in readily removing water from cured water-inthermosettable resin emulsions has been overcome by adding to the emulsion from about 0.005 to 10 parts per 100 parts of emulsion of a polyalkylene oxide block copolymer, nonionic surfactant wherein the hydrophobe portion of the nonionic surfactant has a molecular weight of at least about 1,000. Dewatering of the cured emulsion may be readily effected even at ambient temperatures and at elevated temperatures without cracking or damage to the porous thermoset resin.
Inventors
- 👤 Daniel J Najvar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:06
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/28; C08J9/283; C08F; C08F283/00; C08F283/01; C08J2201/00; C08J2201/04; C08J2201/05; C08J2201/0504; Y; Y10; Y10S; Y10S525/00; Y10S525/922
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
20 words
The process of claim 1 wherein the parts of said nonionic surfactant range from about 0.005 to about 2 parts.
Claim 2
Dependent Claim
13 words
The process of claim 1 wherein said surfactant is prepared from monofunctional initiator.
Claim 3
Dependent Claim
45 words
The process of claim 3 wherein said nonionic surface active agent hydrophobic group comprises a heteric oxyethylene-oxypropylene chain ether of a monohydric alcohol containing from one to eight carbon atoms wherein the weight ratio of oxypropylene to oxyethylene ranges from about 95:5 to 85:15, respectively.
Claim 4
Dependent Claim
22 words
The process of claim 4 wherein about 44 to 55 weight percent of said surface active agent comprises a polyoxyethylene hydrophilic group.
Claim 5
Dependent Claim
18 words
The process of claim 4 wherein said hydrophobic group has a molecular weight of about 1,000 to 2,000.
Claim 6
Dependent Claim
14 words
The process of claim 1 wherein said surfactant is prepared from a difunctional initiator.
Claim 7
Dependent Claim
36 words
The process of claim 7 wherein said difunctional initiator is propylene glycol, said nonionic surfactant hydrophobic group is a polYoxypropylene group and said surfactant comprises from 10 to 80 weight percent of a polyoxyethylene hydrophilic group.
Claim 8
Dependent Claim
19 words
The process of claim 8 wherein said hydrophobic group has a molecular weight of about 1,750 to about 3,250.
Claim 9
Dependent Claim
15 words
The process of claim 8 wherein said surfactant contains about 80 weight percent of polyoxyethylene.
Claim 10
Dependent Claim
25 words
The process of claim 1 wherein said emulsion further comprises from about 0.07 to 0.25 parts of paraffin wax per 100 parts of said emulsion.
Claim 11
Dependent Claim
19 words
The process of claim 1 wherein said emulsion is prepared at a temperature of about 30* to 150* F.
Claim 12
Dependent Claim
19 words
The process of claim 1 wherein said thermoset resin is dehydrated at a temperature up to about 500* F.
Claim 13
Dependent Claim
32 words
The process of claim 1 wherein said emulsion further comprises up to 3 parts per 100 parts of said emulsion of a surface active agent different from said nonionic surface active agent.
Claim 14
Dependent Claim
15 words
The process of claim 14 wherein said different surface active agent is an anionic surfactant.
Claim 15
Dependent Claim
11 words
The thermoset article produced according to the process of claim 1.
Claim 16
Dependent Claim
132 words
A thermosettable emulsion containing water as the dispersed phase which comprises from about 30 to 80 parts of water, about 70 to 20 parts of a thermosettable resin and about 0.005 to 10 parts per 100 parts of said emulsion of a polyethylene oxide-polyalkylene oxide block copolymer nonionic surface active agent having a polyalkylene oxide hydrophobic group with a molecular weight of at least about 1,000, wherein said thermosettable resin comprises from about 30 to 80 parts of a resin selected from the group consisting of an unsaturated polyester resin, vinyl ester resin and mixtures thereof and from about 70 to 20 parts of a copolymerizable monomer or mixtures thereof and wherein said vinyl ester resin is prepared by reacting about equivalent amounts of an unsaturated monocarboxylic acid with a polyepoxide resin.
Claim 17
Dependent Claim
20 words
The emulsion of claim 17 wherein the parts of said nonionic surfactant range from about 0.005 to about 2 parts.
Claim 18
Dependent Claim
14 words
The emulsion of claim 17 wherein said surfactant is prepared from a monofunctional initiator.
Claim 19
Dependent Claim
45 words
The emulsion of claim 19 wherein said nonionic surface active agent hydrophobic group comprises a heteric oxyethylene-oxypropylene chain ether of a monohydric alcohol containing from one to eight carbon atoms wherein the weight ratio of oxypropylene to oxyethylene ranges from about 95:5 to 85:15, respectively.
Claim 20
Dependent Claim
22 words
The emulsion of claim 20 wherein about 44 to 55 weight percent of said surface active agent comprises a polyoxyethylene hydrophilic group.
Claim 21
Dependent Claim
18 words
The emulsion of claim 20 wherein said hydrophobic group has a molecular weight of about 1,000 to 2,000.
Claim 22
Dependent Claim
14 words
The emulsion of claim 17 wherein said surfactant is prepared from a difunctional initiator.
Claim 23
Dependent Claim
35 words
The emulsion of claim 23 wherein said initiator is propylene glycol, said nonionic surfactant hydrophobic group is a polyoxypropylene group and said surfactant comprises from 60 to 90 weight percent of a polyoxyethylene hydrophilic group.
Claim 24
Dependent Claim
19 words
The emulsion of claim 24 wherein said hydrophobic group has a molecular weight of about 1,750 to about 3,250.
Claim 25
Dependent Claim
15 words
The emulsion of claim 25 wherein said surfactant contains about 80 weight percent of polyoxyethylene.
Claim 26
Dependent Claim
25 words
The emulsion of claim 17 wherein said emulsion further comprises from about 0.07 to 0.25 parts of paraffin wax per 100 parts of said emulsion,
Claim 27
Dependent Claim
19 words
The emulsion of claim 17 wherein said emulsion is prepared at a temperature of about 30* to 150* F.
Claim 28
Dependent Claim
32 words
The emulsion of claim 15 wherein said emulsion further comprises up to 3 parts per 100 parts of said emulsion of a surface active agent different from said nonionic surface active agent.
Claim 29
Dependent Claim
15 words
The emulsion of claim 29 wheRein said different surface active agent is an anionic surfactant.
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) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |