Porous materials containing melamine resin
Assignee3M Innovative Properties Company
InventorBert J. Exsted
Life of this patent
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Abstract
Coated porous materials that exhibit air permeability and repellency to liquids as well as coated, nonporous breathable materials are described as suitable for making ileostomy vent filters, transdermal drug substrates, agricultural and medical apparel, as well as paint and chemical protective garments. The coating composition is applied as a curable composition containing cross-linkable melamine, polyol and fluorocarbon alcohol precursors. Hydrophilic coatings may be prepared by incorporating a polyvalent salt with the curable composition.
Claims23
A coated porous material comprising:
- (a) a porous material, and
- (b) a cured coating derived from a composition applied to said porous material comprising:
- (i) a compound of the formula
- wherein R is each independently H, CH2OH or CH2OR2, and R1 and R2 are each independently alkyl having 1 to 4 carbon atoms;
- and
- (ii) an alcohol selected from the group consisting of perfluoroalkyl alcohols of the formula
- Rf—(CH2)x—OH,
- in which Rf is CnF2n+1 or
- where x is 1-12;
- n is 3-20, and R3 is H, alkyl of 1-4 carbon atoms or —(CH2)x—OH, and polyhydric alcohols.
A composite comprising:
- (a) a porous material, and
- (b) an amount of a cured coating composition effective to saturate said porous material, said cured composition being derived from a composition comprising:
- (i) a compound of the formula
- wherein R is each independently H, CH2OH or CH2OR2, and R1 and R2 are each independently alkyl having 1 to 4 carbon atoms;
- and
- (ii) an alcohol selected from the group consisting of perfluoroalkyl alcohols of the formula
- Rf(CH2)x—OH
- in which Rf is CnF2n+1 or
- where x is 1-12;
- n is 3-20, and R3 is H, alkyl of 1-4 carbon atoms or —(CH2)x—OH, and polyhydric alcohols.
A composite comprising:
- (a) a porous matrix material containing polar groups which are ether moieties in a cross-linked composition derived from a composition comprising:
- (i) a compound of the formula
- wherein R is each independently H, CH2OH or CH2OR2, and R1 and R2 are each independently alkyl having 1 to 4 carbon atoms;
- and
- (ii) an alcohol;
- and
- (b) polyvalent cations bound within the porous matrix which cations are not removed by water extraction.
Dependencies are inferred from the claim text.