Pripol dimerised fatty acids
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PRIPOL dimerised fatty acids. Large hydrocarbon part (C36) hydrophobic hydrolytic resistance of derivatives affinity for non-polar matrices and surfaces. Irregular non-crystalline structure flexibility low Tg flow, wetting. Di-functional constituent for: polyamides polyesters

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PRIPOL dimerised fatty acids

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PRIPOL dimerised fatty acids

  • Large hydrocarbon part (C36)

  • hydrophobic

  • hydrolytic resistance of derivatives

  • affinity for non-polar matrices and surfaces

  • Irregular non-crystalline structure

  • flexibility

  • low Tg

  • flow, wetting

  • Di-functional constituent for:

  • polyamides

  • polyesters

  • polyurethanes

Different forms of PRIPOL dimer technology

PRIPOL dimer acid

PRIPOL dimer diol



made with PRIPOL

dimer acid or

dimer diol



----- OH

A unique performance effect

  • PRIPOL and PRIPLAST technology provide

  • a unique combination of resistance against :

  • Moisture

  • Chemicals

  • Heat

  • Oxidation

  • Radiation

Supportive data

Polyurethane samples were prepared from a range of Priplast polyols and competitive technologies (hexane diol adipate, polycaprolacton, hexane diol carbonate, PTMEG, PPG, and polybutadiene diol)

All polyols used had molecular weight of 2000, except Priplast 3196, which is 3000

All recipes were identical in molecular ratio: one part polyol, 2 parts of butane diol, 3.1 parts of pure MDI

All polyurethanes were made via the prepolymer route: first a prepolymer of polyol and MDI, followed by chain extension with butane diol

Moisture uptake of PRIPLAST dimerate and other polyurethanes

Moisture uptake at 23 C, %

Recipe :1 Polyol

2 Butanediol

3.1 MDI

Conditions : 1 week in H2O dist.

Hydrolysis of PU from PRIPLAST dimerate and other polyols

Retention of tensile strength, %

Recipe :1 Polyol

2 Butanediol

3.1 MDI

Conditions : 1 week in H2O

(dist.) at 90 C

Effect of UV-radiation on PU from PRIPLAST dimerate and other polyols

Retention of tensile strength, %

Recipe :1 Polyol

2 Butanediol

3.1 MDI

Conditions : 2 weeks exposure

to UV-B

Effect of oxidation on PU from PRIPLAST dimerate and other polyols

Retention of tensile strength / elongation, %

Recipe :1 Polyol

2 Butanediol

3.1 MDI

Conditions : Exposure

to 140 C

for 4 weeks

PRIPLAST versus other diols : stability of TPU

Retention of tensile strength, %

Recipe :1 Polyol

2 Butanediol

3.1 MDI

Exposure for 2 weeks

Weather resistance

Retention of tensile strength, %

Hydrolytic stability of PU in boiling water

Retention of tensile strength, %

Mechanical properties of PU from PRIPLAST dimerate and other polyols

crystalline adipate

Recipe:1 polyol


3.1 MDI


strain hardening

Priplast 3192

HDO dimerate/adipate


Priplast 1838

HDO dimerate

no strain hardening

Poly BD/rubber


Effect of polyol on modulus and tensile strength

Recipe 1 Polyol


3.1 MDI

Elongation of PU made with PRIPLAST dimerate and other polyols

Elongation at break, %

Recipe :1 Polyol2 BDO

3.1 MDI

differences only for different MW (3196 is mw 3000, all others 2000) and functuionality (poly-BD)

Shore-A hardness of PU made with PRIPLAST dimerate and other polyols

Shore A

Recipe :1 Polyol2 BDO

3.1 MDI

T(g) of PU made with PRIPLAST dimerate and other polyols

Glasstransition temp., °C

Recipe :

1 Polyol


3.1 MDI

P1838 (*) =1-1-2.1

PRIPLAST polyols for elastomers

A unique combination of thermo-oxidative and hydrolysis resistance

Low-temperature flexibility and flex fatigue resistance

Low-modulus and soft-touch applications

Elastomers by one-shot processing of PRIPLAST polyols

- Priplast polyols do not mix well with many other polyols (especially adipates), chain

extenders and isocyanates

- one-shot processing without precautions may cause difficulty: very brittle product,

or very sticky product

- good one-shot processing is possible by making a blend of PRIPLAST polyol and

chain extender (like butane diol), and convert this blend in a one-shot process

- if for some reason (cost, performance) it is considered to blend PRIPLAST polyol

with other polyester polyols, we recommend to NOT make a physical blend, but

instead work with one single PRIPLAST polyol made with a mixture of acids

Blending polyols

- very careful when mixing partially crystalline polyols

disturbance of crystallinity kills hydrolytic stability, green strength and

tensile strength. Acceptable combinations: 3192 with hexane diol adipate, 3195

with butane diol adipate

- only recommended for the propolymers, for reasons of limited compatibility

PRIPLAST polyols for coatings

- for exceptional weatherability and protection (anticorrosive applications)

- for exceptional flexibility, flex fatigue resistance

- for adhesion to low-energy substrates like plastics

- for 2K, moisture cure and aqueous dispersion type

PRIPLAST technology for polyurethane coatings: benefits

hydrocarbon character,strength (preservation of hydrogen bonds)

hydrophobicitydurability (hydrolytic resistance)

substrate protection (moisture barrier)

adhesion to low energy substrates

non-crystallinity,strength (flow, substrate wetting)

low glass transitionlong open time

durability (low-temperature flexibility,

stress absorption)

PRIPLAST technology for PU coatings: conditions

No NMP or other cosolvents

solids content at least 35%

particle size max. 500 nm

aliphatic diisocyanates for colour stability reasons

PRIPLAST technology in aqueous polyurethane dispersions


44g Priplast 3195, 6.0g DMPA at 130C/10 mbar for 30 minutes

break vacuum with N2, cool to 110C, add 38.9g IPDI in 10 minutes, react for 1 hour

cool to 60C and add 35g acetone, stir until a clear solution is obtained

cool to 50C, add 6g BDO** and 25g acetone slowly, then another 10g of acetone

react to NCO-number 1.8 (20 hours without catalyst, about 8 hours with catalyst)

add 140g acetone

add mix of 3.1g IPDA+0.3g NH4OH (25%)+20g water, react for 5 hours

add 1.8g NH4OH (25%), stir for half an hour

add 100g water while intensively stirring, until phase inversion (CRITICAL step)

add 50g of water, then remove acetone at 50C under gradually increased vacuum (down to 450 mbar, to prevent foaming)

** to increase crosslinking: use 5.5g BDO with 0.5g TMP


Priplast 3195 (2000 MW)

Priplast 3195, with TMP crosslinker

hexane diol/neopentylglycol (1/1 molar basis) adipate, 1700 MW

(Fomrez ER 191)

hexane diol/neopentylglycol (1/1 molar basis) adipate/dimerate (1/1 weight basis), 1700 MW

Reference: Commercially available benchmark (aliphatic polyester polyol,

4% NMP, 40% solids, sold at about Euro 7/kg dispersion)

PRIPLAST technology in aqueous polyurethane dispersions

- resulting white dispersions have 40% solids and 100-200 nm particles,

and give clear transparent film

- film blocking of Priplast-based materials exceeds that of commercial

PU dispersions

- freeze thaw stability: >1 month at -5/+40C

Properties of coatingsbased on PRIPLAST and other polyols

Polyol% water uptakeadhesion cross cut

24h/23° 24h/50°alufoilsteelacrylPVCABS

PRIPLAST 31952800000

slight haze

PRIPLAST 3195/TMP3700000

slight haze

HDO/NPG adipate 91400500


HDO/NPG 3800500

adipate/dimerate slight haze

Commercial PUD81540011


Chemical resistance of coatingsbased on PRIPLAST and other polyols

Polyolethanol butterdesin- coffeewaterethylaceton


1 h24h10 min24h16 h10 sec10 sec

PRIPLAST 31951010055

PRIPLAST 3195/TMP3010045

HDO/NPG adipate 0-1010055

HDO/NPG/AA/C36 0-1010055

Commercial PUD5152544

Properties of coatingsbased on PRIPLAST and other polyols


(%) König pencil ( (20°)(60°)(85°)

PRIPLAST 31952901084B> 200135137113


with 3% TMP300114B> 200166141118

HDO/NPG adipate 170101HB> 200152125113


adipate/ dimerate 180101F> 200149135111

Commercial PUD273120B> 200158138114

Gloss measured in gloss units

Stability of PU dispersions based on PRIPLAST polyols

kept at 50C

Benefits of PRIPLAST technology for PU dispersion coatings

outstanding dispersion stability

outstanding weatherability and low moisture absorption

outstanding chemicals resistance

good flexibility, hardness and gloss

readily manufacturable

PRIPLAST polyols for adhesives

For hot melts, reactive hot melts, polyurethane dispersions

for thermo-oxidative and hydrolytic resistance

for flexibility, also at low temperatures

for adhesion to low-energy substrates

for universal adhesion on a variety of substrates

Polyol effect of adhesion to steel final strength of moisture cured adhesive

PRIPLAST products

Polyol effect on adhesion to plastic final strength of moisture cured adhesive

Untreated polyethylene

2.5 MDI/1 polyol

PRIPLAST products

Advice on PRIPLAST polyols for adhesives

Specially recommended for applications with long open time.

Green strength is typically low because of non-crystalline character, but specialist advice is available to overcome this

moisture curing is slower because of hydrophobicity

PRIPLAST 3191 in water repellent, flexible PU sealant foam

  • Low water absorption, hence good water sealing properties

  • Good hydrolytic resistance and compression set over conventional polyester foams, hence improved life cycle

  • Low fogging

  • Low air permeability, hence improved sealing properties

Compression set of PU foam from PRIPLAST dimerate vs. other polyols

Compression set after hydrolysis, %

Acrylic plates

PU foam sealant

(dyecut, 50% compressed)


Water seal test

100 mm

Water seal properties

Leaking of water after :

- PU from Priplast 3191 : > 24 hrs

- Conventional PU : < 10 min

Acrylic plates, clamped

PU foam sealant

(dyecut, 50% compressed)


Water absorption test

Water absorption properties

- PU from Priplast 3191 : < 1% V/V

- Conventional PU : 20 % V/V

24 hrs. immersion in water

Physical properties

CharacteristicPriplast 3191Conventional

polyesterpolyester foam

foam(low fogging grade)

Density, kg/m3 50 50

Water absorption (ASTM D 994) < 1% > 20%

Water seal properties > 24 hrs < 10 min.

Air permeability, litre / min < 15 50

Non fogging properties :

- Reflectrometric method 96.6 % 85.1 %

(3 hrs / 100 °C)

- Gravimetric method 0.70 mg 0.95 mg

(16 hrs / 100 °C)

Application of PRIPLAST 3191 based foams

  • Automotive industry, sealants for :

    • Airconditioning systems

    • Windows

    • Head and tail lamps

    • Mirrors

    • Door locks

    • Sun roofs

  • General industry, sealants for :

    • Airconditioning and ventilation

    • Roof windows

    • Refrigerators

Starting formulation

(a) : Tegostab B-8002, ex. Th. Goldschmidt

(b) : Dispersant ex. Uniqema

(c) : Tertiary amine catalyst ex. Osi Specialities

Choosing the PRIPLAST polyol that is required

2 categories:

partially crystalline products: 3192, 3195

amorphous products: 3190, 3196, 3197, 3198, 1838, 1839

partially crystalline:

crystallinity gives additional tensile strength (esp. 3192)

crystallinity gives green strength in adhesives

crystallinity is good for hydrolytic stability

crystallinity comes with lower ingredient cost (because of adipic)


for adhesion to non-polar substrates and compatibilizing with non-polar matrices

for low glass transition temperatures (pressure sensitive adhesives, very flexible coatings)

PRIPOL 2033 , dimerdiol

Specifications :

  • acid valuemax.0.20mg KOH/g

  • saponification valuemax.2.0mg KOH/g

  • hydroxyl value202 - 212mg KOH/g

  • colour APHAmax.50Hazen

  • moisturemax.0.10%

  • monomer alcoholmax.2.0%

  • dimer alcoholmin.96.5%

  • trimer alcoholmax.1.5%

  • viscositytypically 2500 mPa.s at 25 °C

    MW = approx. 540

PRIPLAST polyester polyols:portfolio

3192semi-crystallinebest hydrolytic stability (like polycarbonate diol),

MW 2000best tensile strength (similar to PTMEG), best green strength. for coatings, elastomers, adhesives

3195semi-crystalline, cheaper alternative to 3192 (slightly less for

MW 2000hydrolytic stability, green strength, tensile strength)

3190amorphous, MW 2000adhesives and coatings for low-energy substrates

applications that require a very low Tg (-20C and lower)

users that require a low-viscosity liquid

3196amorphous, MW 3000compatibilizing, pressure sensitive adhesives


3198amorphous, MW 1300coloured, for adhesives, primer coatings

1838amorphous, MW 2000pressure sensitive adhesives, compatibilizing

1839amorphous, MW 2000coloured cost-effective alternative to 1838

3191amorphous, MW 1700water-repellant foam

PRIPLAST polyester polyols:specifications

PRIPLASTacid valueOH-valueColourMoisture

mg KOH/gmg KOH/gGardner%

3192max. 0.552-60max. 2max. 0.1

3195max. 1.052-60max. 2max. 0.10

3190max. 1.052-60max. 2max. 0.08

3196max. 0.534-40max. 2max. 0.1

3197max. 0.552-60max. 2max. 0.08

3198max. 178-88max. 6max. 0.01

1838max. 1.052-60max. 2max. 0.08

1839max. 1.052-60max. 6max. 0.08

31910.7-1.568-73-max. 0.07

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