US4082887A
Expired / Lapsed
US
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Coating composition for a fibrous nonwoven sheet of polyolefin
Assignee: EIDP Inc
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Filing: 1976-05-14
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Granted: 1978-04-04
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Expires: 1996-05-14
Abstract
Abstract There is disclosed a coating composition which when applied on a fibrous nonwoven sheet of polyolefin and dried provides a sheet having antistatic properties, high water barrier and antislip properties. The composition consists essentially of (a) an effective amount of a water-insoluble wax which is dispersible in water at a concentration of 10% by weight based on the total amount of wax and water, the wax requiring for dispersion in water only a nonionic surfactant or a mixture of two or more nonionic surfactants in an amount of at least 15% and not more than 100% by weight based on the amount of wax, the nonionic surfactant having a hydrophilic-lipophilic balance of from about 6-10; (b) an effective amount of an antistat having the formula M n R 3-n PO 4 where M is a lithium, sodium, potassium or ammonium ion, R represents an alkyl group containing from 3-5 carbon atoms, and n is 1 or 2; (c) a nonionic surfactant having a hydrophilic-lipophilic balance of from about 6-10, the surfactant being present in an amount of from about 15-100% by weight based on the amount of wax; (d) a water-insoluble binder resin capable of wetting the polyolefin sheet, having a Tg of from about 20°-50° C and which, in the form of an aqueous dispersion, does not coagulate in the presence of the antistat; (e) water; and optionally about 1-6% by weight of a pigment, based upon the weight of the coating composition when dried; solids being present in the composition in an amount of from about 10-40% by weight. Nonwoven fibrous sheets of polyolefin coated with the composition are also disclosed.
Inventors
- 👤 Don Mayo Coates
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:00
CPC Classifications
A; A23; A23B; A23B7/00; A23B7/14; A23B7/144; A23B7/148; A23B2/00; A23B2/70; A23B2/704; A23B2/708; D; D06; D06M; D06M13/00; D06M13/244; D06M13/282; D06M13/292; Y; Y10; Y10S; Y10S524/00; Y10S524/91; Y10S524/912; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31801; Y10T442/00; Y10T442/20; Y10T442/2418; Y10T442/2451; Y10T442/2861; Y10T442/291; Y10T442/2918
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
119 words
A coating composition which when applied on a fibrous nonwoven sheet of polyolefin and dried provides a sheet having antistatic properties, high water barrier and antislip properties, said composition consisting essentially of (a) an effective amount of a water-insoluble wax which is dispersable in water at a concentration of 10% by weight based on the total amount of wax and water, said wax requiring for dispersion in water only a nonionic surfactant or a mixture of two or more nonionic surfactants in an amount of at least 15% and not more than 100% by weight based on the amount of wax, said nonionic surfactant having a hydrophilic-lipophilic balance of from about 6-10, said wax providing said water barrier properties;
Claim 2
Dependent Claim
119 words
A coating composition which when applied on a fibrous nonwoven sheet of polyolefin and dried provides a sheet having antistatic properties, high water barrier and antislip properties, said composition consisting essentially of (a) an effective amount of a water-insoluble wax which is dispersable in water at a concentration of 10% by weight based on the total amount of wax and water, said wax requiring for dispersion in water only a nonionic surfactant or a mixture of two or more nonionic surfactants in an amount of at least 15% and not more than 100% by weight based on the amount of wax, said nonionic surfactant having a hydrophilic-lipophilic balance of from about 6-10, said wax providing said water barrier properties;
Claim 3
Dependent Claim
139 words
(b) an effective amount of an antistat having the formula M n R 3-n PO 4 where M is selected from the group consisting of lithium, sodium, potassium and ammonium ions, R represents an alkyl group containing from 3 to 5 carbon atoms, and n is selected from the integers 1 and 2; (c) a nonionic surfactant having a hydrophilic-lipophilic balance of from about 6-10, said surfactant being present in an amount of from about 15-100% by weight based on the amount of wax; (d) a water-insoluble binder resin capable of wetting the polyolefin sheet, having a Tg of from about 20°-50° C and which, in the form of an aqueous dispersion, does not coagulate in the presence of the antistat; and (e) water; solids being present in said composition in an amount of from about 10-40% by weight.
Claim 4
Dependent Claim
139 words
(b) an effective amount of an antistat having the formula M n R 3-n PO 4 where M is selected from the group consisting of lithium, sodium, potassium and ammonium ions, R represents an alkyl group containing from 3 to 5 carbon atoms, and n is selected from the integers 1 and 2; (c) a nonionic surfactant having a hydrophilic-lipophilic balance of from about 6-10, said surfactant being present in an amount of from about 15-100% by weight based on the amount of wax; (d) a water-insoluble binder resin capable of wetting the polyolefin sheet, having a Tg of from about 20°-50° C and which, in the form of an aqueous dispersion, does not coagulate in the presence of the antistat; and (e) water; solids being present in said composition in an amount of from about 10-40% by weight.
Claim 5
Dependent Claim
19 words
The composition of claim 1 wherein the antistat is a mixture of potassium dibutyl phosphate and dipotassium butyl phosphate.
Claim 6
Dependent Claim
28 words
The composition of claim 1 wherein the binder resin is present in a concentration of from 40-80% by weight based upon the weight of the composition when dried.
Claim 7
Dependent Claim
46 words
The composition of claim 1 wherein the binder resin is a mixture of a cross-linked terpolymer of ethyl acrylate, styrene and acrylonitrile having a Tg of about 20° C and a cross-linked terpolymer of ethyl acrylate, styrene and acrylonitrile having a Tg of about 33° C.
Claim 8
Dependent Claim
26 words
The composition of claim 1 containing pigment in a concentration of from about 1-6% by weight based upon the weight of the coating composition when dried.
Claim 9
Dependent Claim
23 words
The composition of claim 4 containing from about 1-6% by weight of pigment based upon the weight of the coating composition when dried.
Claim 10
Dependent Claim
92 words
A coating composition which when applied on a fibrous nonwoven sheet of polyolefin and dried provides a sheet having antistatic properties, high water barrier and antislip properties, said composition consisting essentially of (a) a water-insoluble binder resin capable of wetting the polyolefin sheet, having a Tg of from about 20°-50° C and which, in the form of an aqueous dispersion, does not coagulate in the presence of component (c), said binder resin being present in an amount of from about 40-80% by weight, based upon the weight of the composition when dried;
Claim 11
Dependent Claim
92 words
A coating composition which when applied on a fibrous nonwoven sheet of polyolefin and dried provides a sheet having antistatic properties, high water barrier and antislip properties, said composition consisting essentially of (a) a water-insoluble binder resin capable of wetting the polyolefin sheet, having a Tg of from about 20°-50° C and which, in the form of an aqueous dispersion, does not coagulate in the presence of component (c), said binder resin being present in an amount of from about 40-80% by weight, based upon the weight of the composition when dried;
Claim 12
Dependent Claim
200 words
(b) from about 15-40% by weight, based on the amount of binder resin, of a water-insoluble wax which is dispersible in water at a concentration of 10% by weight based on the total amount of wax and water, said wax requiring for dispersion in water only a nonionic surfactant or a mixture of two or more nonionic surfactants in an amount of at least 15% and not more than 100% by weight based on the amount of wax, said nonionic surfactant having a hydrophilic-lipophilic balance of from about 6-10; (c) from about 5-15% by weight, based on the amount of binder resin, of an antistat having the formula M n R 3-n PO 4 where M is selected from the group consisting of lithium, sodium, potassium and ammonium ions, R represents an alkyl group containing from 3 to 5 carbon atoms, and n is selected from the integers 1 and 2; (d) a nonionic surfactant having a hydrophilic-lipophilic balance of from about 6-10, said surfactant being present in an amount of from about 15-100% by weight based on the amount of wax; and (e) water; solids being present in said composition in an amount of from about 10-40% by weight.
Claim 13
Dependent Claim
200 words
(b) from about 15-40% by weight, based on the amount of binder resin, of a water-insoluble wax which is dispersible in water at a concentration of 10% by weight based on the total amount of wax and water, said wax requiring for dispersion in water only a nonionic surfactant or a mixture of two or more nonionic surfactants in an amount of at least 15% and not more than 100% by weight based on the amount of wax, said nonionic surfactant having a hydrophilic-lipophilic balance of from about 6-10; (c) from about 5-15% by weight, based on the amount of binder resin, of an antistat having the formula M n R 3-n PO 4 where M is selected from the group consisting of lithium, sodium, potassium and ammonium ions, R represents an alkyl group containing from 3 to 5 carbon atoms, and n is selected from the integers 1 and 2; (d) a nonionic surfactant having a hydrophilic-lipophilic balance of from about 6-10, said surfactant being present in an amount of from about 15-100% by weight based on the amount of wax; and (e) water; solids being present in said composition in an amount of from about 10-40% by weight.
Claim 14
Dependent Claim
23 words
The composition of claim 7 containing from about 1-6% by weight of pigment based upon the weight of the coating composition when dried.
Claim 15
Dependent Claim
26 words
A fibrous nonwoven sheet of polyolefin coated with the composition of claim 1 and dried, said sheet exhibiting antistatic and antislip properties and high water barrier.
Claim 16
Dependent Claim
26 words
A fibrous nonwoven sheet of polyolefin coated with the composition of claim 6 and dried, said sheet exhibiting antistatic and antislip properties and high water barrier.
Claim 17
Dependent Claim
17 words
A coated nonwoven sheet of claim 10 wherein the sheet is composed of film-fibril elements of polyolefin.
Claim 18
Dependent Claim
12 words
The coated nonwoven sheet of claim 11 wherein the polyolefin is polyethylene.
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) | 1981-04-03 | 1981-10-03 | 1982-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-03 | 1985-10-03 | 1986-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-03 | 1989-10-03 | 1990-04-04 | $7700.00 | Window Closed / Lapsed |