Document:

<PRE>
                                                                  Exhibit 10.20

                                                              November 4, 1998

Dr. Robert M. Parlman
402 Erin Isle Court
Holland, MI  49424

Dear Bob:

         We are extremely pleased to offer you the position of President,
Textile Chemicals with Sybron Chemicals Inc., based at our Wellford, SC
facility, at a base salary of $200,000 per year.  You will be eligible for an
annual executive bonus which will be based on your businesses financial
performance vs. targets.  This will be set to yield $50,000 for meeting targets
with a range of $0-100,000 (or potentially even higher) depending on the over/
under performance vs. targets.  The specifics of this bonus plan will be
determined early in the first quarter of 1999.

         As an officer of the Company, the first 100% of your bonus target
(currently 28% of your salary) will be paid in Company stock converted for the
years 1999, 2000 and 2001 at the price of the stock as of your starting date,
with any excess paid in cash.  For subsequent years, the stock price will be the
price as of December 31 of the year three years prior to the bonus year.  Your
bonus will be paid on our about March 1 of the following year.

         Your employment will commence on or about December 1, and you will
report directly to me.

         Following are the general conditions of your employment with our
company:

1.       Subject to our direction and control, you will devote your full efforts
         to carry out the functions of President, Textile Chemicals.  A job
         description providing an overview of your duties and responsibilities
         is attached.

2.       On joining the Company, you will receive options for 25,000 shares of
         Company stock according to our Stock Option Plan (copy enclosed).

3.       You will be a member of the Management Committee, comprised of SCI's
         senior management, including me.

Page Two
R. Parlman
November 4, 1998

4.       You will be eligible to participate in our medical, dental and group
         insurance plans, Savings & Thrift (including the defined contribution
         pension feature) Plan, Share Participation Plan, and Supplemental
         Executive Retirement Plan (a copy of the Summary Plan Description is
         enclosed) in accordance with our current policy as it may change from
         time to time.  In your position, you are permitted to schedule vacation
         time as you see fit, while fulfilling your business responsibilities.

5.       In the case of field trips on the business of the company, your
         reasonable and necessary vouchered expenses will be paid by us in
         accordance with our expense policy.  You will have the use of a company
         car under the policy for an executive of your grade, including gas,
         maintenance, and insurance at Company expense.

6.       The Company is required by Federal Law to request that you provide us
         with proof of your U.S. citizenship or your legal status as an alien
         before you begin employment with us.  Please refer to the enclosed
         letter and Form I-9 in order that you can bring the appropriate papers
         with you when you begin employment.  We will make copies of your papers
         at that time.

7.       We will pay the costs of moving you, including household possessions,
         from your current home to a location in the Greenville-Spartanburg, SC
         area, in accordance with the attached Company Moving Policy.  We will
         cover all incidental costs associated with the move up to a maximum of
         one month's salary, and will also reimburse you for temporary living
         costs for a reasonable period, not to exceed 7 months.  Additionally,
         we will pay the normal closing costs involved in buying a new home and
         selling your current home.

8.       Our standard company policies will prevail with respect to termination
         of employment, except that, unless you are terminated for Cause (as
         hereinafter defined), your minimum termination payment will be 12
         months' salary.  "Cause" shall mean any significant incidence of the
         following:  (a) An act of dishonesty by you constituting a felony or
         other crime involving moral turpitude resulting or intended to result
         directly or indirectly in your personal enrichment at the Company's
         expense; (b) The willful engaging by you in misconduct which is
         injurious to the Company; (c) Habitual drunkenness or drug addition;
         (d) The refusal by you to substantially perform your duties; (e) The
         violation by you of any

Page Three
R. Parlman
November 4, 1998

         express direction or reasonable rule or regulation established by the
         Company from time-to-time regarding the conduct of its business, and;
         (f) Any violation by you of the terms and conditions of this or any
         other agreement between you and the Company.

9.       We require that you undergo and provide us with the results of a
         routine post-offer physical examination, including drug urine test, at
         Sybron's expense.  Our offer of employment is contingent on the
         satisfactory results of this physical and drug screen.  Please contact
         Susan Jarnagin, Compensation & Benefits Manager, at our Birmingham
         facility (800-678-0020 ext. 293) to make the necessary arrangements.

10.     We will reimburse you for any non-vested portions of your current 401(k)
         employee matching contributions and annual bonus award, subject to a
         maximum of $25,000, upon your presenting appropriate verification.

11.      Advise us in writing, please, if you have any agreements with a former
         employer which might affect your employment by or at Sybron Chemicals
         Inc.  You should also supply us with a copy of any such agreement.
         You also agree not to reveal to Sybron Chemicals Inc. any information
         which is proprietary to your former employers.

12.      Please sign the attached Trade Secret, Restrictive Covenant and Patent
         Agreement in accordance with Company Policy.

13.     Enclosed is an application form for you to complete and return with your
        acceptance of this offer.

         We are enclosing a signed duplicate of this letter and if the terms of
our employment offer are satisfactory, please sign and return the duplicate to
us by November 15, 1998 in the enclosed pre-addressed Fed Ex envelope.  Its
receipt by Sybron Chemicals Inc. will constitute an agreement between us and
will be binding

Page Four
R. Parlman
November 4, 1998

upon and inure to the benefit of you, this Company, and any company succeeding
to the general business and properties of this Company by merger, purchase or
otherwise.

         If you have any questions, please feel free to contact me at once.

         We look forward to your joining us.

                                           Sincerely,

                                           Richard M. Klein
                                           President and Chief Executive Officer

AGREED TO:

By:_____________________________
         Robert M. Parlman

Date:___________________________

RMK/me
Enclosures

                                                     November 4, 1998

Dr. Robert M. Parlman
402 Erin Isle Court
Holland, MI  49424

Dear Bob:

         Supplementing the terms of your Employment Agreement with Sybron
Chemicals Inc. (the "Company"), this will confirm that, in the event there shall
be a Change in Control (as hereinafter defined) and thereafter your employment
with the Company terminates at any time prior to December 31, 2000 Without Cause
(as hereinafter defined), you shall be entitled to a lump sum payment equal to
twice your annual base salary then in effect, payable no later than 30 days
after your employment with the Company so terminates.

         Termination of your employment with the Company Without Cause shall
mean (a) termination by the Company without Cause (as defined in your Employment
Agreement with the Company), or (b) termination by you by reason of (i) the
Company's failure to make any of the payments, or provide any of the material
benefits (or their equivalent), under the terms of your Employment Agreement
with the Company, or (ii) a material adverse change in your position or in the
scope of your duties and responsibilities.

         A "Change of Control" shall be deemed to have occurred upon the
earliest to occur of the following events:  (i) sale or disposal of
substantially all of the assets of the Company, or (ii) the date any entity,
person or group, within the meaning the Section 13(d)(3) or Section 14(d)(2) of
the Securities Exchange Act of 1934, as amended, other than the Company or
Citicorp, or any of their subsidiaries, or any employee benefit plan (or related
trust) sponsored or maintained by the Company or any of its subsidiaries, shall
have become the beneficial owner of, or shall have obtained voting control over,
more than fifty percent (50%) of the outstanding shares of (a) the Company's
Common Stock, or (b) the Common Stock of the Company resulting from the merger
or consolidation of the Company with or into any other entity.

Page Two
R. Parlman/Employment Agreement Supplement
November 4, 1998

         If the above correctly reflects our understanding, please so indicate
by signing in the space provided below for such purpose.

                                           Sincerely,

                                           Richard M. Klein
                                           President and Chief Executive Officer
                                           Sybron Chemicals Inc.

RMK/me

AGREED:

_______________________________
Robert M. Parlman

Date:___________________________

                  TRADE SECRET, RESTRICTIVE COVENANT AND PATENT AGREEMENT

         AGREEMENT made this ___ day of November, 1998, between Sybron Chemicals
Inc., (hereinafter Company), and Robert M. Parlman (hereinafter Employee).

                                    WITNESSETH:

         WHEREAS, the Employee is or is about to be employed by the Company as
President, Textile Chemicals;

         NOW THEREFORE, in consideration of such employment and continued
employment by the Company and remuneration to be paid by the Company to the
Employee, the parties agree as follows:

         1.       ACKNOWLEDGEMENTS

                  Employee acknowledges that:

                  A.       The Company possesses confidential information and
                           trade secrets relating but not limited to production
                           procedures and processes, product formulas,
                           machinery, designs, plans, identity of the Company's
                           suppliers, identity of the Company's customers,
                           special applications and uses of products, technology
                           and/or services by the Company's customers, special
                           relationships developed by the Company with its
                           customers and suppliers, customer proposals and the
                           Company's pricing and other practices.

                  B.       As President, Textiles, Employee will have access to
                           such confidential information and trade secrets of
                           the Company.

                  C.       The Company has taken reasonable and necessary
                           precautions to preserve the secrecy and
                           confidentiality of its trade secrets and confidential
                           information.

                  D.       The Company has a legitimate and real interest in
                           protecting against the disclosure to or use by other
                           persons of such trade secrets and confidential
                           information by reasonably restricting the Employee's
                           activities upon the termination of his employment
                           with the Company.

                                                                  -2-

         2.       NON-DISCLOSURE.  During the term of the Employee's employment
with the company and at any time after the termination of his employment with
the Company, regardless of the time, manner, or cause of such termination, the
Employee shall not, except in the regular course of the Company's business,
divulge, furnish or make accessible, or use for his own benefit, any
confidential information or trade secrets of the Company.

         3.       RESTRICTIVE COVENANT.  During the term of the Employee's
employment with the Company and for a period of eighteen (18) months after the
termination of his employment with the Company, regardless of the time, manner,
or cause of such termination, the Employee shall not directly or indirectly,
individually or as an employee, agent, or representative of any other person,
corporation, partnership, firm or entity (a) employ, hire or contract the
services of any other person in the employ of the Company, or (b) influence or
alter, or attempt to influence or alter, any aspect of the relationship between
the Company and its customers or the Company and its suppliers.  Should a
violation of any of these restrictive covenants occur, the period during which
such violation occurs and remains unmitigated will not be counted as elapsed
time following termination of employment as construed in the application of this
paragraph.

         4.       RETURN OF PROPERTY.  Upon the termination of his employment,
the Employee shall return to the Company all records, memoranda, notes, papers,
correspondence, reports, books, computer software, and all other data and
information and all copies or abstracts thereof that he has concerning the
business of the Company.

         5.       INVENTIONS.  The Employee shall promptly disclose and assign
and does hereby assign to the Company, or its designee, without further
remuneration, all inventions, discoveries, computer software, and improvements
conceived or made by him, solely or jointly with others, during his employment
with the Company or within one (1) year thereafter, and relating to or capable
of use in connection with the Company's business, regardless of whether or not
made during usual business hours and with the use of the Company's material and
equipment.  The Employee shall cooperate with and assist the Company, at the
Company's expense, to obtain patents on any such inventions, discoveries,
computer software or improvements, shall execute all necessary documents in
conjunction therewith and shall take all necessary steps to enable the Company
to secure and enforce such patent protection during his employment with the
Company and at any time thereafter.  The Employee shall not disclose to anyone
at any time any information concerning such invention, discovery or improvement
without the written consent of the Company.

                                                                  -3-

         6.       ENFORCEMENT.  The Employee further acknowledges that any loss
to the Company by reason of his breach of any of his obligations hereunder
cannot be reasonably or adequately compensated in damages in an action at law.
The Company shall therefore be entitled to injunctive or other equitable relief
against the Employee to prevent him from failing to perform his obligations
hereunder.  Resort by the Company to such injunction or other equitable relief
shall not be construed as waiver of any rights the Company may have for damages
or otherwise.  In the event that the Company shall enforce any of the terms of
this agreement by legal action, the Employee shall pay to the Company all costs
of such action, including legal fees.

         7.       PRIOR OBLIGATIONS.  Employee represents that he is not under
any obligation, contractual or otherwise, to any former employer, or any other
party, that would prevent his acceptance of employment with the Company or limit
his ability to comply with the provisions of this Agreement.

         8.       GOVERNING LAW, JURISDICTION.  This Agreement shall be governed
by the laws of the State of New Jersey.  The parties acknowledge that Courts of
the State of New Jersey constitute the proper jurisdiction to resolve any
disputes arising out of or relating to this Agreement, and accordingly consent
to the jurisdiction of the Courts of the State of New Jersey to resolve any such
disputes.

         IN WITNESS WHEREOF, the parties have executed this Agreement the day
and year first written above.

                                      SYBRON CHEMICALS INC.

                                      By:_______________________________________
                                               Richard M. Klein

                                      __________________________________________
                                               Robert M. Parlman

RMK/me
</PRE><PRE>
Mr. Douglas S. Brown
October 4, 1999
Page 6

                                                                  Exhibit 10.21
October 4, 1999

Mr. Douglas S. Brown
Maple Brook Road
Tuxedo, New York 10987

Dear Doug:

We are extremely pleased to offer you the position of President, Polymer
Intermediates Segment, which includes the Ruco Polymer Companies and our Toner
Polymer business, at a base salary of $210,000 per year.  Your position will be
based at Ruco's Hicksville, New York headquarters.  You will be eligible for an
annual Executive Bonus with a target of 28% of base salary.  The bonus will be
based on your Segments' and SCI's performance.  75% of the bonus will be based
on a matrix related to the performance of your Segment, to be determined by
January, 2000, with the target payout set at an  "expected" performance level,
and ranging from 0-200% or more of target based on poor to great performance.
25% of the bonus will be based on the criteria established for Executive
Officers under SCI's Executive Bonus Plan (copy enclosed).  Your first bonus
"year" will cover the period from your date of hire through December 31, 2000.

 As an officer of the Company, the first 100% of your overall bonus target will
be paid in Company Stock converted for the years 2000, 2001 and 2002 at the
price of the stock as of your starting date, with any excess paid in cash.
For subsequent years, the stock price will be the price as of the December 31 of
the year three years prior to the Bonus Year.  The Executive Bonus is typically
paid on or about March 1 of the following year.

Your employment will commence on or about November 1, 1999 and you will report
directly to me. Upon commencement of employment, you will receive a sign-on
payment of $10,000.

Following are the general conditions of your employment with our company:

1.       Subject to our direction and control, you will devote your full efforts
     to carry out the normal functions of President, Polymer Intermediates.  A
     job description providing an overview of your duties and responsibilities
     is attached.

2.       On joining the Company, you will receive options for 25,000 shares of
     Company Stock according to our Stock Option Plan (copy enclosed.)  In the
     absence of any other long-term incentive plan.  During calendar 2000, we
     will award you 10,000 additional options by the end of your first year of
     employment.

3.       You will be eligible to participate in SCI's medical, dental, group
     insurance, Savings & Thrift (including the defined contribution pension
     feature under the Plan), Share Participation Plan, and Supplemental
     Executive Retirement Plan (a copy of the Summary Plan Description is
     enclosed) in accordance with our current policy as it may change from time
     to time.  In your position, you are permitted to schedule vacation time as
     you see fit, while fulfilling your business responsibilities.

4.       In the case of field trips on the business of the company, we will pay
     your reasonable and necessary vouchered expenses in accordance with our
     expense policy.

5.       You will be a member of the Sybron Chemicals Inc. Management Committee,
     comprised of SCI's senior management, including me.

6.       The Company is required by Federal Law to request that you provide us
     with proof of your U.S. citizenship or your legal status as an alien before
     you begin employment with us.  Please refer to the enclosed letter and
     Form I-9 in order that you can bring the appropriate papers with you when
     you begin employment.  We will make copies of your papers at that time.

7.       We will pay the costs of moving you, including household possessions,
     from your current home to a location in the greater  Metro New York area,
     in accordance with the attached company moving policy.  We will cover all
     routine closing costs associated with the move, and provide reimbursement
     for incidental expenses up to a maximum of one month's salary.  In place of
     our standard policy provisions, we also agree to provide you with up to
     three (3) months of temporary living expenses, including those necessary or
     desirable to reduce your commute to Hicksville prior to your move (we will
     define a mutually acceptable arrangement at the time you are ready to begin
     employment with SCI).  Please contact Christine Gilbert, Human Resources
     Manager at our Wellford, South Carolina location (Tele. 1-800-677-3500 ext.
     229) to make the necessary arrangements with our realtor and moving company
     when you are ready to begin the relocation process.  Temporary living
     arrangements will be coordinated through Norma Merrill, Ruco's Employee
     Relations Administrator.  Our offer to provide relocation assistance will
     be good for up to one year from your date of employment.

8.       You will be eligible for a company car under the terms of our Executive
     Leased Automobile Policy (copy attached).  We will reimburse you for gas,
     maintenance and provide for insurance coverage.

9.       Our standard company policies will prevail with respect to termination
     of employment, including termination for Cause.   "Cause" shall mean any
     significant incidence of the following:  (a) an act of dishonesty by you
     constituting a felony or other crime involving moral turpitude or resulting
     or intended to result directly or indirectly in your personal enrichment at
     the Company's expense, (b) the willful engaging by you in misconduct which
     is injurious to the Company, (c) habitual drunkenness or drug addiction,
     (d) the refusal by you to substantially perform your duties, (e) the
     violation by you of any express direction or reasonable rule or regulation
     established by the Company from time to time regarding the conduct of its
     business, and (f) any violation by you of the terms and conditions of this
     or any other agreement between you and the Company. Enclosed is a letter
     that addresses termination of employment in the event of a Change in
     Control.

10.       We require that you undergo and provide us with the results of a
     routine post offer physical examination, including drug urine test, at
     SCI's expense.  Our offer of employment is contingent on the satisfactory
     results of this physical and drug screen.  Please contact Paula Polyak,
     Human Resources Supervisor, at our Birmingham facility (extension 308) to
     make the necessary arrangements.

11.       Advise us in writing, please, if you have any agreements with a former
     employer, which might affect your employment by SCI.  You should also
     supply us with a copy of any such agreement.  You also agree not to reveal
     to SCI any information, which is proprietary to your former employers.

12.       Please sign the attached Trade Secret, Restrictive Covenant and Patent
     Agreement in accordance with Company Policy.

We are enclosing a signed duplicate of this letter and, if the terms of our
employment offer are satisfactory, please sign and return the duplicate to us by
October 18, in the enclosed self-addressed envelope.  Its receipt by SCI will
constitute an agreement between us and will be binding upon and inure to the
benefit of you, this company, and any company succeeding to the general business
and properties of this company by merger, purchase or otherwise.

If you have any questions, please feel free to call me or Stephen R. Adler, our
Vice President, Human Resources at any time.

We look forward to your joining us.

Sincerely,

Richard M. Klein
President and Chief Executive Officer

The foregoing is hereby accepted this ________ day of ___________, 1999.

By:_____________________
          Douglas S. Brown

                                                     October 4, 1999

Mr. Douglas S. Brown
Maple Brook Road
Tuxedo, New York 10987

Dear Doug:

         Supplementing the terms of your Employment Agreement with Sybron
Chemicals Inc. (the "Company"), this will confirm that, in the event there shall
be a Change in Control (as hereinafter defined) and thereafter your employment
with  the Company terminates at any time prior to December 31, 2001 Without
Cause (as hereinafter defined), you shall be entitled to a lump sum payment
equal to twice your annual base salary then in effect, payable no later than 30
days after your employment with  the Company so terminates.

         Termination of your employment with the Company Without Cause shall
mean (a) termination by the Company without Cause (as defined in your Employment
Agreement with), or (b) termination by you by reason of (I) the Company's
failure to make any of the payments, or provide any of the material benefits
(or their equivalent), under the terms of your Employment Agreement with the
Company, or (ii) a material adverse change in your position or in the scope of
your duties and responsibilities.

         A "Change of Control" shall be deemed to have occurred upon the
earliest to occur of the following events: (I) sale or disposal of substantially
all of the assets of the Company, or (ii) merger or consolidation of the Company
with or into such other corporation, other than, in either case, a merger or
consolidation of the Company in which holders of shares of the Company's Common
Stock immediately prior to the merger or consolidation will have at least a
majority of the ownership of common stock of the surviving corporation (and, if
one class of common stock is not the only class of voting securities entitled to
vote on the election of directors of the surviving corporation, a majority of
the voting power of the surviving corporation's voting securities) immediately
after the merger or consolidation, which common stock (and, if applicable,
voting securities) is to be held in the same proportion as such holders'
ownership of Common Stock of the Company immediately before the merger or
consolidation, or (iii) the date any entity, person or group, within the meaning
the Section 13(d)(3) or Section 14(d)(2) of the Securities Exchange Act of 1934,
as amended, other than the Company or Citicorp, or any of their subsidiaries, or
any employee benefit plan (or related trust)  sponsored or maintained by the
Company or any of its subsidiaries, shall have become the beneficial owner of,
or shall have obtained voting control over, more than forty percent (40%) of the
outstanding shares of the Company's Common Stock.

         If the above correctly reflects our understanding, please so indicate
by signing in the space provided below for such purpose.

                                           Sincerely,

                                           Richard M. Klein
                                           President and Chief Executive Officer
                                           Sybron Chemicals Inc.

RMK/cvm

AGREED:

____________________________
Douglas S. Brown

Date: _______________________

</PRE>

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