Timothy Paul Lambert

US Patent:

8344172, Jan 1, 2013

Filed:

Mar 25, 2011

Appl. No.:

13/071952

Inventors:

Rick Tabor - Glenview IL, US
Brian K. Mirous - Evanston IL, US
Timothy L. Lambert - Lindenhurst IL, US
Michael E. O'Brien - Hainesville IL, US
Matthew I. Levinson - Skokie IL, US
Daniel J. Dershowitz - Columbus OH, US

Assignee:

Stepan Company - Northfield IL

International Classification:

C07C 69/76

US Classification:

560 8, 560 85, 560 54, 560217

Abstract:

A process for making bis(aryloxyalkyl)terephthalates useful as antiplasticizers for thermoplastic polyesters is disclosed. Dimethyl terephthalate is reacted with an excess of an aryloxyalkanol in the presence of a condensation catalyst to produce an intermediate mixture comprising a bis(aryloxyalkyl)terephthalate, a mono(aryloxyalkyl)terephthalate, and unreacted aryloxyalkanol. This mixture continues to react at reduced pressure while unreacted aryloxyalkanol is removed and the mono-ester content is reduced to less than 1 mole % based on the combined amounts of mono- and bis-esters. Both steps are performed substantially in the absence of oxygen. Additional unreacted aryloxyalkanol is then removed to provide a purified bis(aryloxyalkyl)terephthalate having an overall purity of at least 98 mole % and a yellowness index less than 10. Careful control over catalysis, exposure to air, and other process conditions enables the preparation of high yields of bis(aryloxyalkyl)terephthalates that have low color and other valuable attributes. A method of producing bis(aryloxyalkyl)terephthalate articles having improved compressive strength is also disclosed.

US Patent:

20100240785, Sep 23, 2010

Filed:

Mar 26, 2010

Appl. No.:

12/748047

Inventors:

F. Leo Hickey - Arlington Heights IL, US
Timothy Lambert - Lindenhurst IL, US
Chunhua Yao - Wheeling IL, US

International Classification:

C08G 18/42

US Classification:

521157, 521160, 521172

Abstract:

There are provided aromatic polyester polyol compositions comprising: (i) at least one aromatic acid component; (ii) at least one hydroxylated component; (iii) at least one functionalized natural oil component; and (iv) optionally at least one catalyst component for use in preparing foams. The aromatic polyester polyol compositions can be formed by esterification and/or transesterification. The present technology also provides a polyol blend for use in preparing foams wherein the polyol blend comprises (a) an aromatic polyester polyol formed by an interesterification reaction between (i) a phthalic acid based material; (ii) a hydroxylated material; and (iii) a hydrophobic material, wherein the hydrophobic material is present in an amount of from about 1% to about 50% by weight of the aromatic polyester polyol; and (b) a natural oil based polyol, wherein the hydrophobic material in the aromatic polyester polyol compatibilizes the natural oil based polyol to form a phase stable polyol blend.

US Patent:

20130090399, Apr 11, 2013

Filed:

Dec 3, 2012

Appl. No.:

13/692507

Inventors:

Stepan Company - Northfield IL, US
Timothy Lambert - Lindenhurst IL, US
Chunhua Yao - Wheeling IL, US

Assignee:

STEPAN COMPANY - Northfield IL

International Classification:

C08G 18/06

US Classification:

521131, 521170

Abstract:

There are provided aromatic polyester polyol compositions comprising: (i) at least one aromatic acid component; (ii) at least one hydroxylated component; (iii) at least one functionalized natural oil component; and (iv) optionally at least one catalyst component for use in preparing foams. The aromatic polyester polyol compositions can be formed by esterification and/or transesterification. The present technology also provides a polyol blend for use in preparing foams wherein the polyol blend comprises (a) an aromatic polyester polyol formed by an interesterification reaction between (i) a phthalic acid based material; (ii) a hydroxylated material; and (iii) a hydrophobic material, wherein the hydrophobic material is present in an amount of from about 1% to about 50% by weight of the aromatic polyester polyol; and (b) a natural oil based polyol, wherein the hydrophobic material in the aromatic polyester polyol compatibilizes the natural oil based polyol to form a phase stable polyol blend.