Title: Solvent system for electrostatic shade band deposition process

Abstract: An electrostatic spray process for the formation of a shade band on a polymeric innerlayer for laminated safety glass is disclosed. The improvement comprises using a solvent system of N-lower alkyl-pyrrolidone and tetrahydrofuran. This solvent system combines high dye solubility for process efficiency with proper volatility for optimum aesthetic quality in the finished product.

Do you think this is a good invention? Vote now:

Votes so far: For:(0) Against:(0)
Other info:

Inventors: Postupack, Dennis S. (Natrona Heights, PA, US)
Allerton, David A. (Glenshaw, PA, US)

Application Number: 856150
Filing Date: 1977-11-30
Publication_date: 1979-02-13
Assignee: PPG Industries, Inc. (Pittsburgh, PA)
Primary Class(es): 427/469
Other Classes:
US Patent Ref:

2739080	Mar, 1956	Woodworth	427/164.
2914373	Nov, 1959	Rieser	8/4.
3008858	Nov, 1961	Blake et al.	8/4.
3591406	Jul, 1971	Moynihan	427/280.
3973058	Aug, 1976	Grover et al.	427/163.

Other Refs:
Primary Examiner: Hoffman, james R.
Assistant Examiner:
Attorney: Seidel; Donna L.