UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) MAY 10, 2005 ------------------------- ISP CHEMCO INC. - -------------------------------------------------------------------------------- (Exact Name of Registrant as Specified in Its Charter) DELAWARE - -------------------------------------------------------------------------------- (State or Other Jurisdiction of Incorporation) 333-17827-01 51-0382622 - -------------------------------------------------------------------------------- (Commission File Number) (IRS Employer Identification No.) 300 DELAWARE AVENUE SUITE 303 WILMINGTON, DELAWARE 19801 - -------------------------------------------------------------------------------- (Address of Principal Executive Offices) (Zip Code) (302) 427-5818 - -------------------------------------------------------------------------------- (Registrant's Telephone Number, Including Area Code) NOT APPLICABLE - -------------------------------------------------------------------------------- (Former Name or Former Address, if Changed Since Last Report) Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below): |_| Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) |_| Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) |_| Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) |_| Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) ADDITIONAL REGISTRANTS Address, including zip code State or other and telephone number, jurisdiction of including area code, of Exact name of registrant as incorporation or Registration No./I.R.S. registrant's principal specified in its charter organization Employer Identification No. executive offices - ------------------------ ------------ --------------------------- ----------------- ISP Chemicals Inc. Delaware 333-70144-08/ Route 95 Industrial Area, 22-3807357 P.O. Box 37 Calvert City, KY 42029 (270) 395-4165 ISP Minerals Inc. Delaware 333-70144-07/ 34 Charles Street 22-3807370 Hagerstown, MD 21740 (301) 733-4000 ISP Technologies Inc. Delaware 333-70144-09/ 4501 Attwater Avenue and 22-3807372 State Highway 146 Texas City, TX 77590 (409) 945-3411 2 ITEM 5.02. DEPARTURE OF DIRECTORS OR PRINCIPAL OFFICERS; ELECTION OF DIRECTORS; APPOINTMENT OF PRINCIPAL OFFICERS (b) On May 10, 2005, Mr. Richard A. Weinberg resigned from his positions as Executive Vice President, Secretary and director of ISP Chemco Inc. (the "Company"), to be effective immediately, after twelve years of service to the Company, in order to pursue another opportunity. Mr. Weinberg also resigned his positions and directorships from all other affiliated companies, including our parent company, International Specialty Holdings Inc. ("Holdings"). On the same date, Holdings announced the appointment of Mr. Peter J. Ganz as Senior Vice President, General Counsel and Secretary. Mr. Ganz began his career at International Specialty Products Inc. in 1995 and his current positions include Senior Vice President and General Counsel of the Company. Mr. Weinberg will remain with the Company and affiliated companies until July 15, 2005, during which time Mr. Weinberg will assist in transitioning his duties to Mr. Ganz. Attached as Exhibit 99.1 is a communication distributed by the Company regarding Mr. Weinberg's departure and Mr. Ganz' appointments. (d) On May 10, 2005, Mr. Peter J. Ganz was elected to the board of directors of the Company and of Holdings. ITEM 9.01. FINANCIAL STATEMENTS AND EXHIBITS (c) Exhibits 99.1 Company announcement. 3 SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this Report to be signed on its behalf by the undersigned hereunto duly authorized. ISP CHEMCO INC. ISP CHEMICALS INC. ISP MINERALS INC. ISP TECHNOLOGIES INC. Dated: May 16, 2005 By: /s/ Kenneth M. McHugh --------------------------------- Name: Kenneth M. McHugh Title: Vice President and Controller 4 EXHIBIT INDEX EXHIBIT NO. DESCRIPTION ----------- ----------- 99.1 Company announcement. 5