Patent · US Expired

Spray coating matting method for printing plate precursors

US6500494B2 · kind B2 · utility

0Cited by

8References

9Claims

0Family size

Assignee

Kodak Polychrome Graphics Company Ltd. · US

Inventors

Gerhard Hauck · Badenhausen, DE
Nils Nessler · Osterode, DE
Heinfried Rudolph · Osterode, DE

Key dates

Filing date	Dec 29, 2000
Grant date	Dec 31, 2002
Priority date	—
Expiry date	Dec 29, 2020

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09D139/06
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

A method for applying a matting layer to a radiation-sensitive layer of a printing plate precursor is disclosed. The method comprises: (a) providing a matting composition comprising a polymer and a solvent, wherein the matting composition has a solid content of more than 10% and no more than 50% by weight based on the total composition; and (b) spraying the matting composition on the radiation-sensitive layer using an electrostatically aided rotary atomizer having a bell speed of more than 10,000 rpm, wherein the distance between the bell and the radiation-sensitive layer to be coated is less than 30 cm. The printing plate precursor may be in the form of a moving web. The method of the present invention can be used for matting any kind of radiation-sensitive layer of conventional positive and negative working lithographic printing plate precursors.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.