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DIBUTYL TEREPHTHALATE BLENDS IN PLASTICIZER AND RELATED APPLICATIONS

IP.com Disclosure Number: IPCOM000246664D
Publication Date: 2016-Jun-24
Document File: 9 page(s) / 120K

Publishing Venue

The IP.com Prior Art Database

Related People

Thomas Markley: AUTHOR [+2]

Abstract

The present disclosure pertains to uses of di-n-butyl, diisobutyl, and mixed n-butyl/isobutyl terephthalates (collectively referred to as DBT) in various market applications. These applications include use as a plasticizer in polyvinyl chloride, where DBT confers improved efficiency, very fast fusion along with low and stable viscosity in plastisols when used in combination with a general purpose plasticizer, and expedited plasticizer absorption in dry blends. In addition these applications include use as a plasticizer in polyvinyl chloride, where DBT when blended with general purpose plasticizers at any ratio, for example at about 5/95 10/90, 15/85, 20/80, 25/75, 30/70, 35/65, 40/60, 45/55, or 50/50 weight percent leads to low melt viscosity, better abrasion resistance, improved clarity, and a broadened formulation window. Applications where these and other attributes provide commercial and technical benefits are disclosed.

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Page 01 of 9

DIBUTYL TEREPHTHALATE BLENDS IN PLASTICIZER AND RELATED APPLICATIONS

The present disclosure pertains to uses of di-n-butyl, diisobutyl, and mixed n-butyl/isobutyl terephthalates (collectively referred to as DBT) in various market applications. These applications include use as a plasticizer in polyvinyl chloride, where DBT confers improved efficiency, very fast fusion along with low and stable viscosity in plastisols when used in combination with a general purpose plasticizer, and expedited plasticizer absorption in dry blends. In addition these applications include use as a plasticizer in polyvinyl chloride, where DBT when blended with general purpose plasticizers at any ratio, for example at about 5/95 10/90, 15/85, 20/80, 25/75, 30/70, 35/65, 40/60, 45/55, or 50/50 weight percent leads to low melt viscosity, better abrasion resistance, improved clarity, and a broadened formulation window. Applications where these and other attributes provide commercial and technical benefits are disclosed.

DETAILED DESCRIPTION OF THE DISCLOSURE

Throughout this document "Blend A" and "Blend B" are mentioned in examples. Both of these blends are mixtures of di-2-ethylhexyl terephthalate (DEHT, DOTP, Eastman 168™) with dibutyl terephthalate (DBT, Eastman Effusion™) where Blend A has a higher amount of DBT than Blend
B. Non-limiting examples of these applications are described below.

PVC Plastisol Viscosity Control. In blends of DBT with general purpose plasticizers such as, for example, diisononyl phthalate (DINP), diisononyl cyclohexanedicarboxylate (DINCH), di-2- ethylhexyl phthalate (DEHP; DOP), di-2-propyl heptyl phthalate (DPHP), diisodecyl phthalate (DIDP) and DEHT, DBT provides (1) high solvating power towards PVC and vinyl chloride- containing copolymers, (2) low initial plastisol viscosity, and (3) excellent plastisol viscosity stability upon storage. Blend A and Blend B compare favorably to general purpose plasticizers such as DEHT, DEHP, DINP, and DINCH on each of these three key features. Figures 1 and 2 illustrate this behavior in blends of DEHT and DBT compared to general purpose plasticizers.


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12000

C

Brookfield Viscosity @ 20 rpm (cP) at 23


° 10000

8000

Blend A Blend B DEHT DEHP DINP

6000

4000

2000

0

0 5 10 15 20 25 30 35

Days

Figure 1: Brookfield viscosity (60 phr plasticizer and 3 phr ESO after initial, 1, 7, 10, 24, & 34 days)

4500

C

°

4000

Calculated Severs Viscosity @ 80 psi, cP at 23

3500

3000

2500

2000

Blend A Blend B DEHT DEHP DINP

1500

1000

500

0

0 5 10 15 20 25 30

Storage time, days

Figure 2: Severs viscosity (60 phr plasticizer and 3 phr ESO after 1, 7, & 30 days; orifice =
0.1484 cm diameter x 5.0 cm)


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Broader PVC formulation and processing window in formulations containing DBT In blends of DBT with general purpose plasticizers such as, for example, DINP, DINCH, DEHP, DPHP, DIDP, and DEHT, DBT provides high solvating power towards PVC and vinyl chloride-containing copolymers leading to lower fusion...