US4632847A
Expired / Lapsed
US
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In situ polymeric membrane for isolating hazardous materials
Assignee: CERTIFIED TECHNOLOGIES CORPORATION A MN CORPORATION
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Filing: 1985-02-06
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Granted: 1986-12-30
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Expires: 2005-02-06
Abstract
Abstract A method and composition for providing, in situ, a polymeric membrane for isolating hazardous materials within an area such as, for example, an asbestos removal job site. The polymer is applied in liquid form to surfaces which are to be protected. Upon cure, a seamless bladder-like membrane is formed which isolates the work area and prevents the spread of airborne, or water-carried particulate. The membrane can then be peeled from the surface and compacted for disposal.
Inventors
- 👤 Henry L. Lomasney
- 👤 John G. Grawe
- 👤 Vikram K. Sheth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:11
CPC Classifications
B; B08; B08B; B08B17/00; B08B17/02; B08B17/04; B09; B09B; B09B3/00; B09B3/30; B09B3/32; B09B2101/00; B09B2101/35
Claims Analysis
Total Claims: 47
Claim 1
Independent Claim
108 words
A process for isolating asbestos within an area, comprising the steps of applying a liquid polymer composition in aqueous dispersion to the surfaces to be protected, allowing the liquid polymer composition to coalesce into a water insensitive and insoluble seamless, bladder-like membrane which adheres to the surface to provide a high integrity receptacle capable of receiving and sustaining an influx of bulk asbestos, and which can be removed intact by physically peeling from the surface to which it has been applied, peeling the membrane from the surface, and compacting the peeled membrane to form a package of sufficient integrity to retain any entrapped asbestos throughout a disposal process.
Claim 2
Dependent Claim
108 words
A process for isolating asbestos within an area, comprising the steps of applying a liquid polymer composition in aqueous dispersion to the surfaces to be protected, allowing the liquid polymer composition to coalesce into a water insensitive and insoluble seamless, bladder-like membrane which adheres to the surface to provide a high integrity receptacle capable of receiving and sustaining an influx of bulk asbestos, and which can be removed intact by physically peeling from the surface to which it has been applied, peeling the membrane from the surface, and compacting the peeled membrane to form a package of sufficient integrity to retain any entrapped asbestos throughout a disposal process.
Claim 3
Dependent Claim
39 words
The process of claim 1, wherein the percent elongation of the membrane is at least 83.4, and the membrane, when bonded onto stainless steel, can maintain the integrity of its bond unchanged after a one hour immersion in water.
Claim 4
Dependent Claim
25 words
The process of claim 1, wherein the liquid polymer composition forms an asbestos capturing membrane capable of immobilizing asbestos particles which contact the membrane's surface.
Claim 5
Dependent Claim
22 words
The process of claim 3, wherein the membrane is capable of immobilizing at least 2 mg of asbestos particulate per square inch.
Claim 6
Dependent Claim
20 words
The process of claim 3, wherein the polymer membrane possesses ethylenic double bond functionality useful in the immobilization of asbestos.
Claim 7
Dependent Claim
23 words
The process of claim 3, wherein the liquid polymer composition includes a capture index modifier to enhance the capture index of the membrane.
Claim 8
Dependent Claim
59 words
The process of claim 6, wherein the capture index modifier comprises an alkenyl succinimide, adipic acid-diethylene glycol polyester, ester of a fatty acid, maleated rosin, hydrocarbon oil, alcohol-fumaric acid-tall oil rosin reaction product, asphaltic, extender oil, dehydrated castor oil, furfural or phenol modified naphthenic oil, bituminous substance, phenolic resin, diisooctyl adipate, hydroxybenzoate compound, di(butylcarbital) formal or liquid isoprene rubber.
Claim 9
Dependent Claim
20 words
The process of claim 6, wherein the membrane has a capture index of at least 2 mg asbestos/in 2 .
Claim 10
Dependent Claim
28 words
The process of claim 3, wherein the liquid polymer composition comprises cis-1,4-polyisoprene, hevea rubber, trans-1,4-polyisoprene, gutta percha rubber, balata rubber, trans-1,4-polybutadiene, cis-1,4-polybutadiene, neoprene, butadiene-styrene copolymer or 1,2-polybutadiene rubber.
Claim 11
Dependent Claim
12 words
The process of claim 9, wherein the polymer is cis- or trans-1,4-polyisoprene.
Claim 12
Dependent Claim
14 words
The process of claim 9, wherein the polymer is hevea rubber of balata rubber.
Claim 13
Dependent Claim
13 words
The process of claim 9, wherein the polymer is cis- or trans-1,4 polybutadiene.
Claim 14
Dependent Claim
12 words
The process of claim 9, wherein the polymer is gutta percha rubber.
Claim 15
Dependent Claim
14 words
The process of claim 9, wherein the polymer is neoprene or a butadiene-styrene copolymer.
Claim 16
Dependent Claim
22 words
The process of claim 9, wherein the membrane is capable of immobilizing at least 2 mg of asbestos particulate per square inch.
Claim 17
Dependent Claim
13 words
The process of claim 9, wherein the composition further comprises a debonding agent.
Claim 18
Dependent Claim
37 words
The process of claim 16, wherein the liquid polymer composition comprises from about 38 to about 93 weight percent of the polymer in suspension, and from about 0.38 to about 4.6 weight percent of a debonding agent.
Claim 19
Dependent Claim
39 words
The process of claim 17, wherein the debonding agent comprises silicon polymer, unsaturated fatty acid-monoamide, fatty bisamide, polyethylene glycol 140 monostearate, petrolatum, fluoroalkylpolyoxyethylenes, fluoroalkyl amino acids, sodium alkyl benzene sulfonates, modified polydimethylsiloxane, synthetic waxes, hydrazine derivatives, or nonionic fluorosurfactants.
Claim 20
Dependent Claim
13 words
The process of claim 18, wherein the debonding agent is a synthetic wax.
Claim 21
Dependent Claim
22 words
The process of claim 16, wherein the membrane is capable of immobilizing at least 2 mg of asbestos particulate per square inch.
Claim 22
Dependent Claim
12 words
The process of claim 16, wherein the composition comprises a fire retardant.
Claim 23
Dependent Claim
20 words
The process of claim 21, wherein the composition comprises from about 1.8 to about 15.8 weight percent of fire retardant.
Claim 24
Dependent Claim
15 words
The process of claim 22, wherein the fire retardant comprises antimony oxide or alumina trihydrate.
Claim 25
Dependent Claim
22 words
The process of claim 21, wherein the membrane is capable of immobilizing at least 2 mg of asbestos particulate per square inch.
Claim 26
Dependent Claim
42 words
The process of claim 3, wherein the liquid polymer composition further comprises at least one additive, wherein the additive composes coloring pigment, thickener, antifoam agent, antimicrobial, mildewcide, non-skid particulate, emulsifying surfactant, organic debonding agent, vulcanizing agent, capture index modifier, or flame retardant.
Claim 27
Dependent Claim
13 words
The process of claim 25, wherein the composition further comprises a debonding agent.
Claim 28
Dependent Claim
37 words
The process of claim 26, wherein the liquid polymer composition comprises from about 38 to about 93 weight percent of the polymer in suspension, and from about 0.6 to about 4.6 weight percent of a debonding agent.
Claim 29
Dependent Claim
40 words
The process of claim 27, wherein the debonding agent comprises a silicon polymer, unsaturated fatty acid-monoamide, fatty bisamide, polyethylene glycol 140 monostearate, petrolatum, fluoroalkylpolyoxyethylene, fluoroalkyl amino acid, sodium alkyl benzene sulfonate, modified polydimethylsiloxane, synthetic wax, hydrazine derivative, or nonionic fluorosurfactant.
Claim 30
Dependent Claim
13 words
The process of claim 28, wherein the debonding agent is a synthetic wax.
Claim 31
Dependent Claim
22 words
The process of claim 26, wherein the membrane is capable of immobilizing at least 2 mg of asbestos particulate per square inch.
Claim 32
Dependent Claim
13 words
The process of claim 26, wherein the composition further comprises a fire retardant.
Claim 33
Dependent Claim
20 words
The process of claim 31, wherein the composition comprises from about 1.8 to about 15.8 weight percent of fire retardant.
Claim 34
Dependent Claim
15 words
The process of claim 32, wherein the fire retardant comprises antimony oxide or alumina trihydrate.
Claim 35
Dependent Claim
22 words
The process of claim 31, wherein the membrane is capable of immobilizing at least 2 mg of asbestos particulate per square inch.
Claim 36
Dependent Claim
13 words
The process of claim 26, wherein the composition further comprises a coloring pigment.
Claim 37
Dependent Claim
32 words
The process of claim 35, wherein the coloring pigment comprises zinc oxide and titanium dioxide, carbon black, iron oxides (red and black), micaceous iron oxide, aluminum powder, phthalocyanine blue or phthalocyanine green.
Claim 38
Dependent Claim
13 words
The process of claim 26, wherein the composition comprises a capture index modifier.
Claim 39
Dependent Claim
59 words
The process of claim 37, wherein the capture index modifier comprises an alkenyl succinimide, adipic acid-diethylene glycol polyester, ester of a fatty acid, maleated rosin, hydrocarbon oil, alcohol-fumaric acid-tall oil rosin reaction product, asphaltic, extender oil, dehydrated castor oil, furfural or phenol modified naphthenic oil, bituminous substance, phenolic resin, diisooctyl adipate, hydroxybenzoate compound, di(butylcarbital) formal or liquid isoprene rubber.
Claim 40
Dependent Claim
22 words
The process of claim 37, wherein the membrane is capable of immobilizing at least 2 mg of asbestos particulate per square inch.
Claim 41
Dependent Claim
98 words
The process of claim 27 wherein the liquid polymer composition comprises from about 38 to about 93 weight percent of the polymer in suspension, from 0 to about 4.6 weight percent of a debonding agent, from about 0 to about 15.8 weight percent of fire retardant, from 0 to about 20 weight percent of a thickener, from 0 to about 1.8 weight percent of an antifoam agent, from 0 to about 3.6 weight percent of an emulsifying surfactant, from 0 to about 1.8 weight percent of antimicrobial, and from 0 to about 31 weight percent of non-skid particulate.
Claim 42
Dependent Claim
13 words
The process of claim 40, wherein the composition further comprises a coloring pigment.
Claim 43
Dependent Claim
82 words
The process of claim 40 wherein the liquid polymer composition comprises from about 49 to about 93 weight percent of the polymer in suspension, from about 0.49 to about 4.6 weight percent of a debonding agent from about 1.8 to about 15.8 weight percent of fire retardant, from about 0.25 to about 3.6 weight percent of emulsifying surfactant, from about 0.49 to about 5.4 weight percent of a vulcanizing agent, and from about 0.1 to about 5 weight percent of a thickener.
Claim 44
Dependent Claim
41 words
The process of claim 42 wherein the composition further comprises up to about 7.8 weight percent of a capture index modifier, up to about 1.8 weight percent of an antifoam agent, and up to about 0.18 weight percent of a mildewcide.
Claim 45
Dependent Claim
11 words
The process of claim 42 wherein the composition includes a pigment.
Claim 46
Dependent Claim
28 words
The process of claim 42, wherein the liquid polymer composition comprises cis-1,4-polyisoprene, hevea rubber, trans-1,4-polyisoprene, gutta percha rubber, balata rubber, trans-1,4-polybutadiene, cis-1,4-polybutadiene, neoprene, butadiene-styrene copolymer or 1,2-polybutadiene rubber.
Claim 47
Dependent Claim
29 words
The process of claim 40, wherein the liquid polymer composition comprises cis-1,4-polyisoprene, hevea rubber, trans-1,4-polyisoprene, gutta percha rubber, balata rubber, trans-1,4-polybutadiene, cis-1,4 polybutadiene, neoprene, butadiene-styrene copolymer or 1,2-polybutadiene rubber.
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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) | 1989-12-29 | 1990-06-30 | 1990-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-29 | 1994-06-30 | 1994-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-29 | 1998-06-30 | 1998-12-30 | $7700.00 | Window Closed / Lapsed |