초록

A sheet of glass having impressed therein a grid pattern which simulates a stacked series of glass blocks joined by mortar at their joints, in which the grid pattern is confined to certain tolerances so that the sheet is temperable and at the same time creates the desired glass block appearance.

대표청구항 ▼

A sheet of glass having impressed therein a grid pattern which simulates a stacked series of glass blocks joined by mortar at their joints, in which the grid pattern is confined to certain tolerances so that the sheet is temperable and at the same time creates the desired glass block appearance. rep

A sheet of glass having impressed therein a grid pattern which simulates a stacked series of glass blocks joined by mortar at their joints, in which the grid pattern is confined to certain tolerances so that the sheet is temperable and at the same time creates the desired glass block appearance. repared from a mixture of vinyl chloride, vinyl acetate, and an unsaturated carboxylic or polycarboxylic acid or ester. 16. The terpolymer of claim 15 wherein the unsaturated carboxylic or polycarboxylic acid or ester is selected from maleic acid or esters thereof and acrylic acids or esters thereof. 17. The sheeting of claim 11 wherein the thermoplastic polyurethane is an aromatic polyurethane. 18. The sheeting of claim 11 wherein the aminoplast resin (A-3) is selected from urea-formaldehyde resins, melamine-formaldehyde resins, benzoguanamine-formaldehyde resins, and glycoluril-formaldehyde resins. 19. The sheeting of claim 11 wherein the aminoplast resins (A-3) is a melamine-formaldehyde resin selected from alkylated melamine-formaldehyde resins, imino melamine-formaldehyde resins, and mixed ether and butylated melamine-formaldehyde resins. 20. The sheeting of claim 11 wherein the binder layer is obtained from a film-forming mixture comprising: (A-1) from about 30 to about 80 pphr of the vinyl chloride copolymer, (A-2) from about 20 to about 50 pphr of the thermoplastic polyurethane, and (A-3) from about 1 to about 30 pphr of an aminoplast resin. 21. The sheeting of claim 11 wherein the lenses are glass microspheres. 22. The sheeting of claim 11 wherein the cover film comprises a polymer selected from acrylic polymers and thermoplastic urethane polymers. 23. The sheeting of claim 11 also comprising (E) a support layer underlying the binder layer. 24. The sheeting of claim 23 also comprising: (F) a pressure sensitive adhesive layer underlying the support layer, and, optionally, (G) a release layer underlying the adhesive layer. 25. An encapsulated-lens retroreflective sheeting comprising: (A) a base sheet that comprises a monolayer of retroreflective lenses partially embedded in a binder layer; (B) a cover sheet disposed in spaced relationship from and overlying the layer of retroreflective lenses; and (C) a network of intersecting bonds that extend between said cover sheet and said base sheet and comprise binder material thermo-formed at the point of contact between said bonds and said cover sheet to form a plurality of cells within which retroreflective lenses are hermetically sealed and to adhere the base sheet to the cover sheet, wherein the binder layer comprises a polymer obtained from a film-forming mixture comprising: (1) a vinyl chloride copolymer, (2) a thermoplastic polyurethane, and (3) an aminoplast resin. 26. An encapsulated-lens retroreflective sheeting comprising: (A) a base sheet that comprises a monolayer of retroreflective lenses partially embedded in a binder layer; (B) a cover sheet disposed in spaced relationship from and overlying the layer of retroreflective lenses; and (C) a network of intersecting bonds that extend between said cover sheet and said base sheet and comprise binder material thermo-formed at the point of contact between said bonds and said cover sheet to form a plurality of cells within which retroreflective lenses are hermetically sealed and to adhere the base sheet to the cover sheet, wherein the binder layer comprises a polymer obtained from a film-forming mixture comprising: (1) a vinyl chloride copolymer comprising a terpolymer of vinyl chloride, vinyl acetate, and an unsaturated carboxylic or polycarboxylic acid, or ester thereof, (2) a thermoplastic polyurethane, and (3) an aminoplast resin. 27. The sheeting of claim 25 wherein the vinyl chloride copolymer comprises at least about 60% by weight of vinyl chloride. 28. The sheeting of claim 26 wherein the unsaturated carboxylic or polycarboxylic acid or ester is selected from maleic acid, acrylic acids, and their esters. 29. The sheeting of claim 25 wherein the thermoplastic polyurethane is an aromatic polyurethane. 30. The sheeting of claim 25 wherein the aminoplast resin is selected from urea-formaldehyde resins, melamine-formaldehyde resins, benzoguanamine-formaldehyde resins, and glycoluril-