Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond
Patent
1976-05-14
1978-04-04
Lusignan, Michael R.
Stock material or miscellaneous articles
Structurally defined web or sheet
Discontinuous or differential coating, impregnation or bond
260 285R, 260 285A, 260 285AV, 427385B, 428290, 428484, 427390B, C09D 300
Patent
active
040828875
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.sub.n R.sub.3-n PO.sub.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.degree.-50.degree. 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.
REFERENCES:
patent: 3247018 (1966-04-01), Hagge et al.
patent: 3821021 (1974-06-01), McMillin
E. I. Du Pont de Nemours and Company
Lusignan Michael R.
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