Document:

Amendment No.2 to Security Agreement

 Exhibit 4.17(b) 
 AMENDMENT NO. 2 TO SECURITY AGREEMENT 
 AMENDMENT dated as of March 20, 2007 to the Security
Agreement dated as of December 17, 2003 (as heretofore amended, the “Security Agreement”) among EQUISTAR CHEMICALS, LP, a Delaware limited partnership (the “Borrower”); its SUBSIDIARIES from time to time party
thereto; and CITICORP USA, INC., as Administrative Agent (in such capacity, the “Administrative Agent”). 
 The parties
hereto agree as follows: 
 SECTION 1. Defined Terms; References. Unless otherwise specifically defined herein,
each term used herein which is defined in the Security Agreement has the meaning assigned to such term in the Security Agreement. Each reference to “hereof”, “hereunder”, “herein” and “hereby” and each other
similar reference and each reference to “this Agreement” and each other similar reference contained in the Security Agreement shall, after this Amendment becomes effective, refer to the Security Agreement as amended hereby. 
 SECTION 2. Amendment to Security Agreement. The definition of “Transferred Receivables” in Section 1(c) of the
Security Agreement is amended to read as follows: 
 “Transferred Receivables” means any Receivables that
have been sold, contributed or otherwise transferred to (i) Equistar Receivables in connection with the Securitization Facility and (ii) any Excluded Receivables. 
 Section 6(a) of the Security Agreement is amended by inserting the phrase “sold, contributed or otherwise transferred to
Equistar Receivables” immediately following the words “Transferred Receivables.” 
 SECTION 3.
Governing Law. This Amendment shall be governed by and construed in accordance with the laws of the State of New York. 
 SECTION 4. Counterparts. This Amendment may be signed in any number of counterparts, each of which shall be an original, with the same effect as if the signatures thereto and hereto were upon the same instrument.

 SECTION 5. Effectiveness. This Amendment shall become effective as of the date hereof upon its execution and
delivery by the Borrower and the Administrative Agent. 
  

 IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be duly executed as of the date
first above written. 
  

					
	EQUISTAR CHEMICALS, LP
		
	 By:
	 	/s/ Karen A. Twitchell
		 	Name:	 	Karen A. Twitchell
		 	Title:	 	Vice President and Treasurer
	
	CITICORP USA, INC., as Administrative Agent
		
	 By:
	 	/s/ David Jaffe
		 	 Name:
	 	David Jaffe
		 	 Title:
	 	Director/Vice PresidentFirst Supplemental Indenture, dated as of May 4, 2007

 Exhibit 4.3 
 FIRST SUPPLEMENTAL INDENTURE 
 THIS FIRST SUPPLEMENTAL INDENTURE (this “First
Supplemental Indenture”), dated as of May 4, 2007, is made by and between OMNOVA Solutions Inc., a corporation duly organized and existing under the laws of the State of Ohio, as issuer
(the “Company”), and The Bank of New York, as trustee (the “Trustee”). Capitalized terms used herein and not otherwise defined shall have the meaning assigned to them in the Indenture
(as defined below). 
 RECITALS: 
 A. The Company and the Trustee are party to an Indenture, dated as of May 28, 2003 (the “Indenture”). 
 B. Pursuant to the Indenture, the Company issued and the Trustee authenticated and delivered an
aggregate principal amount of $165,000,000 of the Company’s 11 1/4% Senior Secured Notes due 2010
(the “Notes”). 
 C. The Company desires and has requested the Trustee to join with the Company in the
execution and delivery of this First Supplemental Indenture for the purpose of amending the Indenture in order to eliminate certain covenants and certain other provisions. 
 D. Section 9.2 of the Indenture provides that a supplemental indenture may be entered into by the Company and the Trustee to amend or supplement
certain provisions of the Indenture with the consent of Holders of at least a majority in principal amount of the Notes then outstanding and the authorization by a resolution of the Board of Directors of the Company authorizing the execution of any
such amended or supplemental indenture. 
 E. Pursuant to a solicitation by the Company, consents to the amendments to the Indenture, which
will eliminate certain covenants and other provisions pursuant to this First Supplemental Indenture, of Holders of at least a majority in principal amount of the Notes then outstanding have been received and a resolution of the Board of Directors of
the Company has authorized the Company to enter into this First Supplemental Indenture with the Trustee. 
 F. The Company has furnished, or
caused to be furnished, to the Trustee, and the Trustee has received an Officers’ Certificate and an Opinion of Counsel relating to this First Supplemental Indenture. 
 G. All things necessary to make this First Supplemental Indenture a valid agreement of the Company and the Trustee and a valid amendment to the Indenture
have been done. 
 NOW THEREFORE, the parties hereto agree for the benefit of the other parties, as follows: 

 AGREEMENT: 
 Section 1. Amendments to the Indenture. 
 1.1 SECTION 3.9 of ARTICLE III of the Indenture
is amended by deleting the section in its entirety, together with any references thereto in the Indenture, and replacing it with the following: “Intentionally omitted.” 
 1.2 SECTION 3.10 of ARTICLE III of the Indenture is amended by deleting the section in its entirety, together with any references thereto in the
Indenture, and replacing it with the following: “Intentionally omitted.” 
 1.3 SECTION 4.3 of ARTICLE IV of the Indenture
is amended by deleting the section in its entirety, together with any references thereto in the Indenture, and replacing it with the following: “Intentionally omitted.” 
 1.4 SECTION 4.4 of ARTICLE IV of the Indenture is amended by deleting the section in its entirety, together with any references thereto in the
Indenture, and replacing it with the following: “Intentionally omitted.” 
 1.5 SECTION 4.5 of ARTICLE IV of the Indenture
is amended by deleting the section in its entirety, together with any references thereto in the Indenture, and replacing it with the following: “Intentionally omitted.” 
 1.6 SECTION 4.6 of ARTICLE IV of the Indenture is amended by deleting the section in its entirety, together with any references thereto in the
Indenture, and replacing it with the following: “Intentionally omitted.” 
 1.7 SECTION 4.7 of ARTICLE IV of the Indenture
is amended by deleting the section in its entirety, together with any references thereto in the Indenture, and replacing it with the following: “Intentionally omitted.” 
 1.8 SECTION 4.8 of ARTICLE IV of the Indenture is amended by deleting the section in its entirety, together with any references thereto in the
Indenture, and replacing it with the following: “Intentionally omitted.” 
 1.9 SECTION 4.9 of ARTICLE IV of the Indenture
is amended by deleting the section in its entirety, together with any references thereto in the Indenture, and replacing it with the following: “Intentionally omitted.” 
 1.10 SECTION 4.10 of ARTICLE IV of the Indenture is amended by deleting the section in its entirety, together with any references thereto in the
Indenture, and replacing it with the following: “Intentionally omitted.” 
 1.11 SECTION 4.11 of ARTICLE IV of the Indenture
is amended by deleting the section in its entirety, together with any references thereto in the Indenture, and replacing it with the following: “Intentionally omitted.” 
  

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 1.12 SECTION 4.12 of ARTICLE IV of the Indenture is amended by deleting the section in its
entirety, together with any references thereto in the Indenture, and replacing it with the following: “Intentionally omitted.” 
 1.13 SECTION 4.13 of ARTICLE IV of the Indenture is amended by deleting the section in its entirety, together with any references thereto in the Indenture, and replacing it with the following: “Intentionally omitted.”

 1.14 SECTION 4.14 of ARTICLE IV of the Indenture is amended by deleting the section in its entirety, together with any references
thereto in the Indenture, and replacing it with the following: “Intentionally omitted.” 
 1.15 SECTION 4.15 of ARTICLE IV
of the Indenture is amended by deleting the section in its entirety, together with any references thereto in the Indenture, and replacing it with the following: “Intentionally omitted.” 
 1.16 SECTION 4.16 of ARTICLE IV of the Indenture is amended by deleting the section in its entirety, together with any references thereto in the
Indenture, and replacing it with the following: “Intentionally omitted.” 
 1.17 SECTION 4.17 of ARTICLE IV of the Indenture
is amended by deleting the section in its entirety, together with any references thereto in the Indenture, and replacing it with the following: “Intentionally omitted.” 
 1.18 SECTION 4.18 of ARTICLE IV of the Indenture is amended by deleting the section in its entirety, together with any references thereto in the
Indenture, and replacing it with the following: “Intentionally omitted.” 
 1.19 SECTION 4.19 of ARTICLE IV of the Indenture
is amended by deleting the section in its entirety, together with any references thereto in the Indenture, and replacing it with the following: “Intentionally omitted.” 
 1.20 SECTION 4.20 of ARTICLE IV of the Indenture is amended by deleting the section in its entirety, together with any references thereto in the
Indenture, and replacing it with the following: “Intentionally omitted.” 
 1.21 SECTION 4.21 of ARTICLE IV of the Indenture
is amended by deleting the section in its entirety, together with any references thereto in the Indenture, and replacing it with the following: “Intentionally omitted.” 
 1.22 SECTION 5.1 of ARTICLE V of the Indenture is amended by deleting the section in its entirety, together with any references thereto in the
Indenture, and replacing it with the following: “Intentionally omitted.” 
 1.23 SECTION 5.2 of ARTICLE V of the Indenture
is amended by deleting the section in its entirety, together with any references thereto in the Indenture, and replacing it with the following: “Intentionally omitted.” 
  

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 1.24 CLAUSE (c) of SECTION 10.2 of ARTICLE X of the Indenture is amended by deleting the
clause in its entirety, together with any references thereto in the Indenture, and replacing it with the following: “Intentionally omitted.” 
 1.25 Any defined terms present in the Indenture but no longer used as a result of the amendments made by this First Supplemental Indenture are hereby eliminated. The definition of any defined term used in the
Indenture where such definition is set forth in any of the sections or clauses that are eliminated by this First Supplemental Indenture and the term it defines is still used in the Indenture after the amendments hereby become effective shall be
deemed to become part of, and defined in, Section 1.1 of the Indenture. Such defined terms are to be in alphanumeric order within Section 1.1 of the Indenture. 
 Section 2. Miscellaneous. 
 2.1 Effect and Operation of First Supplemental Indenture. This
First Supplemental Indenture shall be effective and binding immediately upon its execution, and thereupon, this First Supplemental Indenture shall form a part of the Indenture for all purposes, and every Note heretofore or hereafter authenticated
and delivered under the Indenture shall be bound hereby, but, notwithstanding anything in the Indenture or this First Supplemental Indenture to the contrary, this First Supplemental Indenture shall not be operative until the Company has accepted for
payment all of the Notes validly tendered pursuant to the Offer (as defined in the Company’s Offer to Purchase and Consent Solicitation Statement, dated April 20, 2007). If the Offer is terminated or withdrawn, or the Notes are not
accepted for purchase for any reason, this First Supplemental Indenture will not become operative and the Indenture will remain in the same form as it was before this First Supplemental Indenture was executed. Except as modified and amended by this
First Supplemental Indenture, all provisions of the Indenture shall remain in full force and effect. 
 2.2 Confirmation and Preservation
of the Indenture. The Indenture as modified and amended by this First Supplemental Indenture is in all respects confirmed and preserved. 
 2.3 Indenture and First Supplemental Indenture Construed Together. This First Supplemental Indenture is an indenture supplemental to and in implementation of the Indenture, and the Indenture and this First Supplemental Indenture
shall henceforth be read and construed together. 
 2.4 Trust Indenture Act Controls. If any provision of this First Supplemental
Indenture limits, qualifies or conflicts with another provision which is required to be included in this First Supplemental Indenture by the Trust Indenture Act, the required provision shall control. 
 2.5 Governing Law. THIS FIRST SUPPLEMENTAL INDENTURE SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK, BUT
WITHOUT GIVING EFFECT TO APPLICABLE PRINCIPLES OF CONFLICTS OF LAW TO THE EXTENT THAT THE 

  

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APPLICATION OF THE LAW OF ANOTHER JURISDICTION WOULD BE REQUIRED THEREBY. 
 2.6 Successors. All agreements of the Company in this First Supplemental Indenture shall bind its successors. All agreements of the Trustee in this
First Supplemental Indenture shall bind its successors. 
 2.7 Severability. In case any provision in this First Supplemental
Indenture shall be invalid, illegal or unenforceable, the validity, legality and enforceability of the remaining provisions shall not in any way be affected or impaired thereby. 
 2.8 Counterpart Originals. The parties may sign any number of copies of this First Supplemental Indenture. Each signed copy shall be an original,
but all of them together represent the same agreement. 
 2.9 Headings. The headings of the Sections of this First Supplemental
Indenture, which have been inserted for convenience of reference only, are not to be considered a part of this First Supplemental Indenture and shall in no way modify or restrict any of the terms or provisions hereof. 
 2.10 Benefits of First Supplemental Indenture. Nothing in this First Supplemental Indenture, express or implied, shall give to any Person, other
than the parties hereto and their successors and the Holders of Notes any benefit or any legal or equitable right, remedy or claim under this First Supplemental Indenture. 
 2.11 Trustee. The Trustee makes no representations as to the validity or sufficiency of this First Supplemental Indenture. The statements and
recitals herein are deemed to be those of the Company and not of the Trustee. 
 [Signature page follows this page.] 
  

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 IN WITNESS WHEREOF, the parties have caused this First Supplemental Indenture to be duly executed
as of the date and the year first written above. 
  

			
	OMNOVA SOLUTIONS INC.
	as issuer
		
	By:	 	 /s/ Michael E. Hicks

	Name:	 	Michael E. Hicks
	Title:	 	 Senior Vice President and Chief Financial Officer; Treasurer

	
	 THE BANK OF NEW YORK,
 as
trustee

		
	By:	 	 /s/ Jeremy Finkelstein

	Name:	 	Jeremy Finkelstein
	Title:	 	Assistant Vice President

  

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