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                                                                   EXHIBIT 10.19

SUPPORT AGREEMENT FOR CABOT CORP. & CABOT MICROELECTRONICS

PURPOSE

The purpose of this document is to define the roles and responsibilities of
Cabot Corporations support and Cabot Microelectronics support after the final
split of Cabot Microelectronics from Cabot Corporation. Cabot Microelectronics
will become it's own entity and have systems responsibilities for its locations
effective September 28th, 2000.

The services described within this document provide a methodology for
introducing and implementing reasonable expectations for Cabot's Asia Pacific
Applications Support, the Alpharetta Help Desk, the Technical Support groups,
and the Tuscola and Alpharetta Applications group. This will also cover Cabot
Microelectronics service responsibilities.

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SUPPORT AGREEMENT FOR CABOT CORP. & CABOT MICROELECTRONICS

LOCATIONS COVERED

The locations which are supported under this document are as follows:

Cabot Microelectronics
----------------------

Aurora                               Manufacturing Location & Corporate Office

Barry                                Manufacturing Location

Geino                                Manufacturing Location

APPLICATIONS SUPPORTED

              J.D. Edwards for Geino
              Marcam (Prism, Advantis) & J.D. Edwards for Barry and Aurora

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SUPPORT AGREEMENT FOR CABOT CORP. & CABOT MICROELECTRONICS

INFRASTRUCTURE SUPPORT

Cabot Corporation has agreed to continue to host and support the following
infrastructure for Cabot Microelectronics until January 1, 2001. The items are
as follows:

     -   Cabot Website
     -   Cabot Connect
     -   Cabot Internet Service Provider
     -   Cabot Frame Relay Network
     -   Cabot Internet Firewall
     -   Cabot NT Domain
     -   NT Primary Domain Controller
     -   Cabot Notes Infrastructure
     -   SMTP Gateway
     -   Network Management Tools
     -   AS400 Connectivity (Client Access)

On or before January 1, 2001 Cabot Microelectronics will provide it's own
services and infrastructure for the items identified above. AS400 Connectivity
is the only item above which will remain. Cabot Microelectronics is responsible
for all licensing of above software if they continue use as their own company.

Technical services personnel from both locations will work on addressing
security issues for new network connectivity for application systems usage. Both
parties agree that we will need to address securing the network for applications
hosting purposes only.

In good faith, both parties will work on transition of the above services.

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SUPPORT AGREEMENT FOR CABOT CORP. & CABOT MICROELECTRONICS

APPLICATIONS SUPPORT

         Cabot Corporation has agreed to host the Marcam (Prism, Advantis) and
         J.D. Edwards applications for Aurora and Barry and host the J.D.
         Edwards applications for the Geino location. The following will outline
         responsibilities for Cabot Corporation and Cabot Microelectronics for
         supporting these applications.

         Cabot Microelectronics will have to pay additional license fees to J.D.
         Edward's and Wonderware Corporation for the extended use of the
         software.

         APPLICATIONS INFRASTRUCTURE:

         Cabot Corporation's Alpharetta based and Tuscola based support groups
         will look to maintain operational reliability of the following:

         - AS400 Operating Systems
         - AS400 Backups
         - AS400 Tuning, Sizing, and Setting Changes
         - AS400 Operational Support
         - AS400 Upgrades - It must be recognized that Cabot will drive upgrades
           based on requirements.

         Note: All recognize that the release levels will be driven by Cabot's
         requirements until October 1, 2001. Negotiations may occur but Cabot
         Corporation has final approval.

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SUPPORT AGREEMENT FOR CABOT CORP. & CABOT MICROELECTRONICS

         APPLICATION SOFTWARE SUPPORT - CABOT MICROELECTRONICS:

         Software Support

         Cabot Microelectronics will provide external and internal resources to
         provide the following support: to their users in Aurora and Barry:

         - PHONE SUPPORT

           Act as the single point of contact for users with required
           assistance. Each call will be logged and assigned a priority with
           appropriate follow-up to the user.

         - FIRST LEVEL SUPPORT

           Where the problem / request can be resolved immediately during the
           call answering process.

           The following are examples of this type of support:

                  Printing                  Can't find report, Change Outq,
                                            Why isn't the report printing

                  User Access               Forgotten AS400 password

         - SECOND LEVEL SUPPORT

           The problem / request requires an in-depth understanding of the
           application, data flows and configuration / setup. Some knowledge is
           also required as the understanding of the business transaction.

           The following are examples of this type of support:

                  How do I reverse an inventory disbursement?
                  Where does an IM document type originate?
                  What exchange rate do I use for currency restatement?

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SUPPORT AGREEMENT FOR CABOT CORP. & CABOT MICROELECTRONICS

         - THIRD LEVEL SUPPORT

           The problem / request requires an in-depth technical knowledge and
           thorough understanding of data and file structure within JDE and
           Marcam (Prism, Advantis).

           The following are examples of this type of support:

              Writing of conversion, interface or enhancement programs Reviewing
              program logic to determine exactly what is occurring Determining
              that a problem is definitely caused by a software bug
              Configuration of additional features / functions

           *** All software change request require documentation for review and
           approval by Tuscola application support group. Since the packaged
           software code is shared code between Cabot's FMO division and Cabot
           Microelectronic we must have a control point to ensure that any
           change request do not have negative impact on one or the other
           companies.

           Once change request is agreed upon the design, development, testing,
           and implementation for the change will move forward. Cabot
           Microelectronics is responsible for design, development, and testing.
           Tuscola applications support group will perform signoff testing and
           will implement changes into the production environment.

         - ACCESS CONTROL

           Access control covers all aspects of user setup, cost center
           security, menu access and menu setup / modification.

         - SECONDARY WORK

           Cabot Microelectronics external resources will work on Tuscola
           applications support group projects as secondary work based on
           available time.

         - AFTER HOURS SUPPORT

         Since the systems are operated on a 24 X 7 basis Cabot Microelectronic
         will be first point of contact for out of normal business hours
         support.

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SUPPORT AGREEMENT FOR CABOT CORP. & CABOT MICROELECTRONICS

APPLICATION SOFTWARE SUPPORT - CABOT CORPORATION (TUSCOLA):

         The Tuscola based applications support group will provide 1st level
         support, 2nd level support, Access Control support, and Phone Support
         as a backup to the internal/external support resources for Cabot
         Microelectronics. Definitions for this support can be found in the
         Cabot Microelectronics application section above in this document.

         Definition of backup means during vacation, sick days, and on agreed
         upon holidays.

         - CHANGE CONTROL

           The Tuscola based applications group will be a key part of the change
           management process. This group will approve request for change that
           impact the global application model, systems operations, systems
           configuration, and setup.

           This group will also perform testing once testing has been completed
           with the developer and end users. The testing performed by the
           Tuscola group will be testing to ensure that the global model has not
           been compromised and that the modifications do not impact the other
           environments for Tuscola and Rheinfelden. In the event some issues
           are surfaced, this group will work with the developers to understand
           whether changes need to be made or whether the change can be
           implemented.

         - MANAGEMENT

           The Tuscola based applications support manager will administratively
           manage the outside consultant to ensure hours worked and efficiency
           of work. This will be done in coordination with the Cabot
           Microelectronics application manager.

         - SOFTWARE MAINTENANCE

           The applications software will be updated on a periodic basis, such
           that the software will be kept at the most current level of release
           that is acceptable to all participating businesses. Each site will be
           responsible for providing users to test these system upgrades.

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SUPPORT AGREEMENT FOR CABOT CORP. & CABOT MICROELECTRONICS

         APPLICATION SOFTWARE SUPPORT - ALPHARETTA AND ALTONA

         Software Support

         Cabot Corporation will provide the following support: to J.D. Edwards
         users in Geino:

         - PHONE SUPPORT

           Act as the single point of contact for users with required
           assistance. Each call will be logged and assigned a priority with
           appropriate follow-up to the user.

         - FIRST LEVEL SUPPORT

           Where the problem / request can be resolved immediately during the
           call answering process.

              The following are examples of this type of support:

                  Printing                 Can't find report, Change Outq,
                                           Why isn't the report printing

                  User Access              Forgotten AS400 password

         - SECOND LEVEL SUPPORT

           The problem / request requires an in-depth understanding of the
           application, data flows and configuration / setup. Some knowledge is
           also required as the understanding of the business transaction.

           The following are examples of this type of support:

                  How do I reverse an inventory disbursement?
                  Where does an IM document type originate?
                  What exchange rate do I use for currency restatement?

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SUPPORT AGREEMENT FOR CABOT CORP. & CABOT MICROELECTRONICS

         - THIRD LEVEL SUPPORT

           The problem / request requires an in-depth technical knowledge and
           thorough understanding of data and file structure within JDE.

           The following are examples of this type of support:

               Writing of conversion, interface or enhancement programs
               Reviewing program logic to determine exactly what is occurring
               Determining that a problem is definitely caused by a software bug
               Configuration of additional features / functions

           *** All software change request require documentation for review and
           approval by Cabot Microelectronics application manager which will
           then be forwarded to the Altona based applications support group for
           approval. Since the packaged software code is shared code between
           Cabot's Corporations North American and Asia Pacific Carbon Black
           locations we must have a control point to ensure that any change
           request do not have negative impact on one or the other companies.

           Once change request is agreed upon the design, development, testing,
           and implementation for the change will move forward. Cabot
           Corporation is responsible for design, development, and testing.
           Geino users will be responsible for user acceptance testing. Any
           requirements that require more than two weeks work or are unable to
           be accommodated in the 10% support time for Cabot Microelectronics
           will need to be reviewed with Director of IS from each organization
           to determine funding requirements.

         - ACCESS CONTROL

           Access control covers all aspects of user setup, cost center
           security, menu access and menu setup / modification.

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SUPPORT AGREEMENT FOR CABOT CORP. & CABOT MICROELECTRONICS

         - CHANGE CONTROL

           The Alpharetta and Altona based applications group will be a key part
           of the change management process. This group will approve request for
           change that impact the global application model, systems operations,
           systems configuration, and setup.

           This group will also perform testing once testing has been completed
           with the developer and end users. The testing performed by these
           groups will be testing to ensure that the global model has not been
           compromised and that the modifications do not impact the other
           locations. In the event some issues are surfaced, this group will
           work with the developers to understand whether changes need to be
           made or whether the change can be implemented.

         - SOFTWARE MAINTENANCE

           The applications software will be updated on a periodic basis, such
           that the software will be kept at the most current level of release
           that is acceptable to all participating businesses. Each site will be
           responsible for providing users to test these system upgrades.

End User Call Request Procedure

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SUPPORT AGREEMENT FOR CABOT CORP. & CABOT MICROELECTRONICS

         The End User must provide as much information as possible relating an
         initiated call. In the event of a problem or program failure the end
         user needs to determine whether this will be a local or regional
         applications issue and then provide the following information:

           - description of failure
           - time of failure
           - last date of successful operation
           - description of any changes made since last successful operation

           For a new feature / program request:
           - detailed description of new feature / request
           - description why this is required / what are you trying to achieve
           - value to Corporation this enhancement will bring / benefit
           - sample report / screen layout, showing data elements required

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                                                                   EXHIBIT 10.20

                   EXTENSION OF MANAGEMENT SERVICES AGREEMENT

         This Extension of the Management Services Agreement (this "Extension")
is executed as of the 29th day of September, 2000 by and between Cabot
Corporation, a Delaware corporation ("Cabot"), and Cabot Microelectronics
Corporation, a Delaware corporation ("CMC"), and extends the term for certain
services to be provided pursuant to the Management Services Agreement (the
"Services Agreement"), dated March 28, 2000, by and between Cabot and CMC.

         WHEREAS, Cabot has been providing certain administrative, financial,
management and other services to CMC pursuant to the Services Agreement;

         WHEREAS, Cabot and CMC wish for certain of those services to continue
beyond September 29, 2000 (the "Distribution Date") ;

         NOW, THEREFORE, for good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, Cabot and CMC, hereby agree as
follows:

         1.  Pursuant to Section 5.01(a) of the Services Agreement, the services
         set forth in Schedule I hereto (the "Extended Services") shall continue
         to be provided by Cabot and purchased by CMC in accordance with the
         terms of the Services Agreement. Except for the Extended Services,
         Cabot shall be under no obligation to provide and CMC shall be under no
         obligation to purchase any other Services (as defined in the Services
         Agreement) after the Distribution Date.

         2.  Subject to the terms of the Services Agreement, Cabot shall
         continue to provide the SH&E Extended Services (described in Schedule
         I) and CMC shall continue to purchase the SH&E Extended Services until
         March 30, 2001, and Cabot shall provide the Information Technology
         Extended Services (described in Schedule I) and CMC shall continue to
         purchase the Information Technology Extended Services for the period
         set forth in the description of the IT Extended Services, but in no
         event beyond December 31, 2001.

         3.  Notwithstanding Section 1 above, in the event the Information
         Technology Extended Services require more Cabot resources than
         generally had been provided prior to March 30, 2001, Cabot shall have
         the right to charge a reasonable profit for such services performed
         after March 30, 2001. If CMC does not agree to such charges, then it
         may terminate for convenience such services without liability after
         March 30, 2001, upon 30 days written notice to Cabot.

         4.  Except for the extension of the time in which the Extended Services
         shall be performed and Cabot's right to charge a profit for the
         Information Technology Extended Services, as set forth in Section 3
         above, nothing herein shall amend the terms of the Services Agreement.

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         IN WITNESS WHEREOF, the parties have caused this Agreement to be signed
by their duly authorized representatives.

                                CABOT CORPORATION

                                By:
                                    -------------------------------------------
                                    Name:
                                    Title:

                                CABOT MICROELECTRONICS CORPORATION

                                By:
                                    -------------------------------------------
                                    Name:
                                    Title:

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                                                                      SCHEDULE I

                                EXTENDED SERVICES

--------------------------------------------------------------------------------

      SERVICE                                                  DESCRIPTION
        AREA
--------------------------------------------------------------------------------
SH&E              Product Stewardship: Cabot will assist CMC in identifying and
                  using appropriate third party resources necessary for CMC to
                  make product regulatory status determinations, make necessary
                  product notifications and product registrations, and make
                  toxicological determinations. In addition, at the request of
                  CMC, Cabot will provide historic information regarding product
                  regulatory status determinations, product notifications and
                  product registrations, and toxicological determinations.

--------------------------------------------------------------------------------
Information       As set forth in Exhibit A hereto.
Technology
--------------------------------------------------------------------------------

                                      -3-

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