Dispercoll^® U products are aliphatic, high-molecular-weight, waterborne polyurethane dispersions used for the formulation of heat-activated adhesives in the furniture, automotive, footwear and construction industries.

Dispercoll U polyurethane dispersions are high-performance adhesive raw materials, which have been shown in Bayer's tests to have performance comparable to polyurethane resins used in solvent-based adhesives. Dispercoll U polyurethane dispersions have outstanding bonding properties on most synthetic and natural materials.

Dispercoll U polyurethane dispersions were developed to help address the increasing environmental demands on the adhesive industry to produce adhesives containing little or no solvent. These waterborne polyurethanes will reduce solvent emissions into the atmosphere and reduce the fire hazards associated with most solvent-based adhesives. To find links to more information about the benefits and applications of polyurethane dispersions in adhesives, visit the Bayer Polyurethane Dispersions Center .

Dispercoll U polyurethane dispersions are based on aliphatic polyisocyanates and therefore offer good resistance to discoloration. These products are stabilized only by small amounts of internal emulsifiers, which contribute to their water resistance properties. Other outstanding properties of the Dispercoll U product line include excellent adhesion to plasticized PVC and other plastics, good heat resistance and compatibility with many compounding ingredients, including resin dispersions, emulsifiers and thickeners. Their adhesion to plasticized PVC and utility in heat-reactivation bonding applications is accomplished through a crystalline polyester polyol backbone. These polyurethane dispersions may also be used in wet bonding adhesive applications.

10 Product Grade(s):
= data sheet(s) = other literature
	DISPERCOLL U 42
	Aqueous polyurethane dispersion; clear, soft amorphouse polymer for wet bonding applications (e.g. textile) using at least one porous substrate; polymer content 50 ± 2%; viscosity 150 - 800 cps/mPa·s; pH 7.5 ± 1.5
	DISPERCOLL U 53
	Aqueous polyurethane dispersion; standard product with 40% solids content with a fast crystallization rate, used for a wide range of applications (furniture, automotive); polymer content 40 ± 1%; viscosity 50 - 600 cps/mPa·s; pH 7.5 ± 1.5
	DISPERCOLL U 54
	Aqueous polyurethane dispersion; high solids level (50%) dispersion with a fast crystallization rate and longer open time after heat activation than Dispercoll U 53; polymer content 50 ± 1%; viscosity 40 - 600 cps/mPa·s; pH 7.5 ± 1.5
	DISPERCOLL U 56
	Aqueous polyurethane dispersion; fast crystallizing product optimized for bonding operations with a low-temperature requirement; Desmodur® D crosslinker needed for heat resistance; polymer content 40 ± 1%; viscosity 50 - 900 cps/mPa·s; pH 7.5 ± 1.5
	DISPERCOLL U KA 8755
	Aqueous polyurethane dispersion; fast crystallizing polymer optimized for higher application temperatures
	DISPERCOLL U KA 8758
	Aqueous polyurethane dispersion; amorphous polymer for flexible bonding applications; polymer content 40 ± 1%; viscosity < 1,000 cps/mPa·s; pH 7.5 ± 1.5
	DISPERCOLL U XP 2643
	aqueous polyurethane dispersion; polymer content (DIN EN ISO 3251) (%) 40 ± 1; Viscosity (DIN 53018) (cps/mPa·S) < 1,0000; ph (DIN 53 758) 7.5 ± 1.5; Density (DIN 51 757) approx 1.1 g/cm3; minimum film-forming temperature (DIN 53 787) approx. 5°C
	DISPERCOLL U XP 2670/1
	aqueous polyurethane dispersion of anionically modified polyurethane for use in packaging, automotive, and footwear industries; polymer content (DIN EN ISO 3251) (%) 35 ± 1; viscosity (DIN 53018) (cps/mPa·s) < 1,000; ph (DIN 53 785) 7.5 ± 1.5; Density (DIN 51 757) approx 1.1 g/cm3; minimum film-forming temperatre (DIN 53787) approx 5°C
	DISPERCOLL U XP 2673/1
	aqueous polyurethane dispersion of an anionically modified polyurethane for the formulation of adhesives; polymer content (DIN EN ISO 3251)(%) 35 ± 2; viscosity (DIN 53018) (cps/mPa·S) < 1,000; ph (DIN 53 785) 7.5 ± 1.,5; Density (DIN 51 757) approx 1.1 g/cm3; minimum film-forming temperature (DIN 53 787) approx 5°C
	DISPERCOLL U XP 2699
	base resin for sealant formulation for construction sealants; good bonding properties on concrete, wood, and metal; polymer content (DIN EIN ISO 3251)(%) approx. 40; viscosity (DIN 53018)(cps/mPa·s) approx. 480; pH (DIN 53 785) 7-9; Density (DIN 51 757) approx. 1.07 g/cm3