Claims
- 1. A laminar structure comprising:
- (a) a first layer of a glazing material selected from the group consisting of glass, polycarbonate, polyurethane, polyacrylate, polyester, polyamide, polyether, and polyacetal; and
- (b) a second layer of a plasticized polyvinyl acetal resin, wherein the polyvinyl acetal resin is derived from polyvinyl alcohol and 4-hydroxybutanal.
- 2. The laminar structure of claim 1 wherein the structure comprises two layers of glass and an interlayer of the plasticized polyvinyl acetal resin.
- 3. The laminar structure of claim 1 wherein the structure comprises two layers of glass and an interlayer of a plasticized polyvinyl acetal resin derived from polyvinyl alcohol, 4-hydroxybutanal, and 3-hydroxy-2-methylpropanal.
- 4. The laminar structure of claim 1 wherein the first layer of glazing material is a polyurethane.
- 5. The laminar structure of claim 1 wherein the second layer contains a plasticizer selected from the group consisting of C.sub.2 -C.sub.30 aliphatic mono-, di-, and polyfunctional alcohols, ethers, and glycol ethers; polyoxyalkylene polyols; and ethers derived from polyoxyalkylene polyols.
- 6. A polymer blend comprising:
- (a) a polyvinyl acetal resin derived from polyvinyl alcohol and 4-hydroxybutanal; and
- (b) a polymer selected from the group consisting of polyurethanes, polyacrylates, polycarbonates, polyesters, polyamides, polyethers, polyvinylpyrrolidones, and polyacetals.
- 7. The polymer blend of claim 6 wherein the polyvinyl acetal resin contains a plasticizer selected from the group consisting of C.sub.2 -C.sub.30 aliphatic mono-, di-, and polyfunctional alcohols, ethers, and glycol ethers; polyoxyalkylene polyols; and ethers derived from polyoxyalkylene polyols.
- 8. The polymer blend of claim 6 wherein the polyvinyl acetal resin is derived from polyvinyl alcohol, 4-hydroxybutanal, and 3-hydroxy-2-methylpropanal.
- 9. A laminar structure comprising:
- (a) a first layer of a glazing material selected from the group consisting of glass, polycarbonate, polyurethane, polyacrylate, polyester, polyamide, polyether, and polyacetal; and
- (b) a second layer, wherein the second layer is a miscible blend of:
- (i) a plasticized polyvinyl acetal resin derived from polyvinyl alcohol and 4-hydroxybutanal; and
- (ii) a polymer selected from the group consisting of polyurethanes, polyacrylates, polycarbonates, polyesters, polyamides, polyethers, polyvinylpyrrolidones, and polyacetals.
- 10. The laminar structure of claim 9 wherein the structure comprises two layers of glass and an interlayer of the miscible blend.
- 11. The laminar structure of claim 9 wherein the first layer of glazing material is a polyurethane.
- 12. The laminar structure of claim 9 wherein the second layer contains a plasticizer selected from the group consisting of C.sub.2 -C.sub.30 aliphatic mono-, di-, and polyfunctional alcohols, ethers, and glycol ethers; polyoxyalkylene polyols; and ethers derived from polyoxyalkylene polyols.
- 13. A process for making a plasticized polyvinyl acetal resin, said process comprising:
- (a) reacting an aqueous solution that contains 4-hydroxybutanal with polyvinyl alcohol in the presence of an acid catalyst to produce a polyvinyl acetal resin;
- (b) combining the polyvinyl acetal resin with a plasticizer selected from the group consisting of C.sub.2 -C.sub.30 aliphatic mono-, di- and polyfunctional alcohols, ethers, and glycol ethers; polyoxyalkylene polyols; and ethers derived from polyoxyalkylene polyols; to form the plasticized polyvinyl acetal resin.
- 14. The process of claim 13 wherein the aqueous solution contains 4-hydroxybutanal and 3-hydroxy-2-methylpropanal.
- 15. The process of claim 13 wherein the acid catalyst is selected from the group consisting of mineral acids, organic acids, acidic ion-exchange resins, acidic clays, and mixtures thereof.
- 16. The process of claim 13 wherein the process is performed at a temperature within the range of about 20.degree. C. to about 100.degree. C.
- 17. A process for making an esterified polyvinyl acetal resin, said process comprising reacting a polyvinyl acetal resin derived from polyvinyl alcohol and 4-hydroxybutanal with a carboxylic acid derivative selected from the group consisting of carboxylic acids, esters, anhydrides, and acid halides.
- 18. The process of claim 17 wherein the carboxylic acid derivative has the formula R(CO)X in which R is a C.sub.4 -C.sub.10 alkyl group, and X is selected from the group consisting of hydroxy, alkoxy, acetoxy, chloride, and bromide.
- 19. An esterified polyvinyl acetal resin made by the process of claim 17.
Parent Case Info
This is a division of application Ser. No. 07/963,298, filed on Oct. 16, 1992 now allowed U.S. Pat. No. 5,332,774.
US Referenced Citations (12)
Foreign Referenced Citations (1)
Number |
Date |
Country |
32-8470 |
Oct 1957 |
JPX |
Non-Patent Literature Citations (2)
Entry |
"Polyvinyl Butyrol, The Interlayer in Laminated Safety Glass", J. A. Snelgrove, Nihon Setchaker Kyokaishi vol. 21, No. 11, pp. 489-495 Dec. 1985. |
"Poly(vinyl aceful)s" E. Lavin and J. A. Snelgrove, Kirk-Othmer Encyclopedia of Chemical Technology, 3rd ed., vol. 23, pp. 798-816 Dec. 1982. |
Divisions (1)
|
Number |
Date |
Country |
Parent |
963298 |
Oct 1992 |
|