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Resin Modifiers > K-FLEX & K-POL

Specialty polyester polyols, urethane diols & specialty diols

Specialty Diols Polyester Polyols Urethane Diols 2K Epoxy Modifiers

Specialty Diol

Product	Hydroxyl # as Supplied	Viscosity 25°C (cPs)	Attributes	TDS	Sample
Solventborne & Waterborne Systems
K-POL 8211	400	7,200	Provides lower VOC systems with improved toughness, high modulus and good exterior durability, plus excellent performance in thin film coatings.

Polyester Polyols

Product	System Type	Hydroxyl # as Supplied	Viscosity 25°C (cPs)	Tg	Attributes
Solvent / Waterborne Coatings & Cast Elastomers
K-FLEX XM-337	SB	220	55,000	-20°C	Provides increased toughness and chemical resistance for solvent based and high solids systems.
K-FLEX 171-90	SB	122	3,700	-30°C	A chain extended version of K-FLEX 188. Offering longer pot life, improved adhesion and flexibility. Low crosslinker demand.
K-FLEX 188	SB, WB, CAST	230	10,000	-32°C	Improves flexibility while maintaining hardness. Also improves salt spray, humidity resistance and exterior durability. Highly recommended for 2k urethane applications.
K-FLEX XM-359	SB, WB, CAST	230	9,800	-32°C	Prevents yellowing interaction with benzotriazole (BZT) UV absorbers in clearcoat systems.
K-FLEX 148	SB	235	3,750	-42°C	Improves flexibility and gloss. Increase solids at lower viscosity. Good flow and leveling. Excellent intercoat adhesion properties. Recommended for primers.
K-FLEX XM-366	SB, WB	265	2,000	-45°C	Newest polyester diol. Excellent flexibility, gloss and hardness.
K-FLEX A307	SB, WB	140	5,400	-50°C	A chain extended version of K-FLEX A308. Flexibility modifier for acrylic/isocyanate and acrylic/melamine systems. Lower crosslinker demand.
K-FLEX A308	SB, WB, CAST	260	1,500	-59°C	Similar to 188. Low viscosity and high hydroxyl number gives good hardness and adhesion and lowers VOCs.
K-FLEX XM-332	SB, CAST	265	400	-68°C	Lowest viscosity for lowest VOC. Softest films.
K-FLEX XM-3307	SB	300	8,000	NA	Pigment wetting resin for solvent based systems.

Urethane Diols

Product	System Type	Hydroxyl # as Supplied	Acid #	Viscosity 25°C (cPs)	Attributes
Solventborne & Waterborne Systems
K-FLEX UD-320-100	SB, WB, Solventless	350	<1	7,000 @ 50°C	Prepolymer synthesis. For water or solvent. Preparation of polyester polyurethanes or alkyd polyurethanes.
K-FLEX UD-320	SB	300	<1	7,000	Increases application solids and hardness. Improves chemical resistance, exterior durability and hydrolytic stability.
K-FLEX UD-350W	WB	325	<1	4,000	Enhanced version of UD-320W for improved storage stability. UD-320W is still available.
K-FLEX XM-386	SB, WB	390	-	78,000	All primary hydroxyl groups. Excellent low temperature cure response. Good moisture resistance.

2K Epoxy Modifiers

Product	System Type	Active Hydrogen as Supplied	Viscosity 25°C (cPs)	Attributes
Solventborne & Solventless Systems
K-FLEX 7301	SB, SL	125	150	Excellent adhesion and improved corrosion resistance. Excellent compatibility with acrylic, polyester, epoxy resins. Faster low temperature cure in 2K epoxy/amine and reduced blushing in 2K epoxy/polyamide
K-FLEX XM-B301	SB	190	1,100	Primarily recommended for use in epoxy/polyamide primers, but can also be used in systems crosslinked with amino resins or polyisocyanates.

K-FLEX is a registered trademark of King Industries, Inc. for its line of Polyester and Urethane Polyols and Resin Modifiers.
K-FLEX is also a registered trademark of Emerald Kalama Chemical for its line of Non-phthalate Plasticizers and Coalescents.