Mixed ion ionomeric sheets and high strength laminates produced therefrom
View Patent ↗The invention describes a polymeric sheet that has at least one layer that comprises an ionomer or ionomer blend that incorporates a partially neutralized alpha, beta-ethylenically unsaturated carboxylic acid component and is useful in glass laminate applications. The ionomer or ionomer blend contains one or more monovalent metal ions in an amount ranging from about 1 to about 60%, preferably about 10 to about 55%, and more preferably about 15 to about 50%, and one or more polyvalent metal ions in an amount ranging from about 40 to about 99%, preferably about 45 to about 90%, and more preferably about 50 to about 85%. This ratio range of monovalent and polyvalent metal neutralization ions provides synergistically greater adhesion to glass than found for either the monovalent or the polyvalent metal neutralization ions alone.
1. A polymeric sheet having a thickness of about 10 mils to about 120 mils and having at least one layer consisting essentially of an ionomer or ionomer blend,
wherein said ionomer is a copolymer of ethylene and about 10 to about 30 weight percent alpha, beta-ethylenically unsaturated carboxylic acid selected from the group consisting of acrylic acid, methacrylic acid and mixtures thereof,
wherein said ionomeric blend is a blend of copolymers of ethylene and about 10 to about 30 weight percent alpha, beta-ethylenically unsaturated carboxylic acid selected from the group consisting of acrylic acid, methacrylic acid and mixtures thereof,
wherein said ionomer or ionomer blend is neutralized with sodium in an amount ranging from about 15 to about 50% and zinc in an amount ranging from about 50 to about 85%, wherein the percentages are based on the total amount of neutralization of the alpha, beta-ethylenically unsaturated carboxylic acid, and
wherein the total amount of neutralization of the alpha, beta-ethylenically unsaturated carboxylic acid is about 43 to about 50%.
2. The polymeric sheet of claim 1 , wherein the sheet is transparent.
3. A laminated article prepared from:
(a) a polymeric sheet as claimed in claim 1 ; and
(b) at least one additional layer selected from the group consisting of rigid sheets, polymeric sheets, polymeric films and combinations thereof.
4. A laminated article prepared from:
(a) a polymeric sheet as claimed in claim 1 ; and
(b) a rigid sheet laminated to said polymeric sheet, wherein said rigid sheet is selected from the group consisting of glass, polycarbonate, poly(meth)acrylate, cyclic polyolefins, polystyrene and combinations thereof.
5. The polymeric sheet of claim 1 , wherein the polymeric sheet has a thickness of 15 to 120 mils.
6. The laminated article of claim 4 , further comprising an additional rigid sheet laminated to the other surface of said polymeric sheet, wherein said additional rigid sheet is selected from the group consisting of: glass, polycarbonate, poly(meth)acrylate, cyclic polyolefins, polystyrene and combinations thereof.
7. The laminated article of claim 4 wherein the article is transparent.
8. The laminated article of claim 4 , wherein the laminated article is transparent and wherein the polymeric sheet has a thickness of 15 to 120 mils.
9. The laminated article of claim 6 , wherein the rigid sheets comprise glass.
10. The laminated article of claim 9 , wherein the laminated article is transparent and wherein the polymeric sheet has a thickness of 30 to 90 mils.
11. The polymeric sheet of claim 5 , wherein the polymeric sheet has a thickness of 30 to 90 mils.