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446084

Sigma-Aldrich

Polyurethane diol solution

average Mn ~320, 88 wt. % in H2O

Synonym(s):

PU Diol Concentrate

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About This Item

MDL number:
MFCD00241502
UNSPSC Code:
12162002
NACRES:
NA.23
Pricing and availability is not currently available.

form

liquid

mol wt

average Mn ~320

composition

urethane, 37%

concentration

88 wt. % in H2O

refractive index

n20/D 1.47

viscosity

8,000 cP(25 °C)(lit.)

acid number

0.6 mg KOH/g(dry basis)

hydroxyl value

350 mg KOH/g(dry basis)

solubility

H2O: soluble

density

1.14 g/mL at 25 °C

General description

Polyurethane diol solution (PUD) is a synthetic polymeric solution that is used as a modifier that is formed by condensation of isocyanates and polyalcohols. It modifies water soluble resins and emulsions which can be used in automotive coating applications.[1]

Application

Modifier for water-soluble resins and emulsions in wood, appliance and auto coatings.
PUD may be used to control the cohesion of silver (Ag) inks which can be printed to form transparent conducting electrodes. These printed electrodes can be used in the fabrication of organic solar cells (OSCs).[2][3] It may also be used as an electrolyte for dye sensitized solar cells (DSSCs).[4]

Features and Benefits

Hydrolytically stable, improves flow and leveling and gives high film hardness.

Physical form

Dihydroxy-functional oligomer. Aliphatic urethane of proprietary composition

Other Notes

This product contains both primary and secondary hydroxyl functionality.

Storage Class Code

10 - Combustible liquids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Choose from one of the most recent versions:

Certificates of Analysis (COA)

Lot/Batch Number
MKCW6062
MKCT6516
MKCT6469
MKCQ2171
MKCP6300

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High efficient plastic solar cells fabricated with a high-throughput gravure printing method.
Kopola P, et al.
Solar Energy Materials and Solar Cells, 94(10), 1673-1680 (2010)
Roll-offset printed transparent conducting electrode for organic solar cells.
Kim I, et al.
Thin Solid Films, 580(2), 21-28 (2015)
Effects of Sodium Iodide (NaI) on Electro-Conductivity with Polyurethane-Diol Organic Electrolyte for Dye-Sensitized Solar Cell (DSSC).
Solid State Phenomena, 268(10), 358-362 (2017)
Isolation of a Pseudomonas aeruginosa strain from soil that can degrade polyurethane diol.
Mukherjee K, et al.
Biodegradation, 22(2), 377-388 (2011)

Questions

1–3 of 3 Questions  

  1. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer

    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

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  2. How can I determine the shelf life / expiration / retest date of this product?

    1 answer

    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf

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  3. Which cross-linking agent is used for Polyurethane-Diol solution, as I want make the sheets from it.

    1 answer

    1. Polyurethane diol contains both primary and secondary alcohols. One might try using an oxidizing agent such as Product 274623 (Dess-Martin periodinane) to oxidize the primary alcohols to aldehyde groups, then a bifunctional dihydrazide such as Product A0638 (Adipic acid dihydrazide) to react with the aldehyde groups to do the actual cross-linking.

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