US 9,808,765 B2
Polyurethane adhesives for reverse osmosis modules
Gordon Kahle, Gifford, PA (US); and Richard D. Jordan, Jr., Allegany, NY (US)
Assigned to ELANTAS PDG, INC., St. Louis, MO (US)
Filed by CYTEC INDUSTRIES INC., Woodland Park, NJ (US)
Filed on Mar. 11, 2015, as Appl. No. 14/644,453.
Claims priority of provisional application 61/951,714, filed on Mar. 12, 2014.
Prior Publication US 2015/0259583 A1, Sep. 17, 2015
Int. Cl. C09J 175/14 (2006.01); B01D 61/02 (2006.01); B01D 65/00 (2006.01); C08G 18/76 (2006.01); C08G 18/65 (2006.01); C08G 18/69 (2006.01); C08G 18/36 (2006.01); C09J 175/04 (2006.01); B01D 61/10 (2006.01); B01D 63/10 (2006.01)
CPC B01D 61/025 (2013.01) [B01D 61/10 (2013.01); B01D 63/10 (2013.01); B01D 65/003 (2013.01); C08G 18/36 (2013.01); C08G 18/6588 (2013.01); C08G 18/69 (2013.01); C08G 18/76 (2013.01); C08G 18/7671 (2013.01); C09J 175/04 (2013.01); B01D 2313/04 (2013.01)] 26 Claims
OG exemplary drawing
 
1. An adhesive composition suitable for reverse osmosis modules, the adhesive composition comprising:
(I) from 65 wt. % to 99 wt. % of a polyurethane composition based on a total wt. % of the adhesive composition, the polyurethane composition comprising:
(A) an isocyanate group-containing pre-polymer comprising a reaction product of (i) castor oil or a derivative thereof; and (ii) a polyisocyanate; and (iii) optionally a second polyol; and
(B) an isocyanate-reactive polyol mixture comprising: (i) a polybutadiene polyol; and (ii) a urethane catalyst; and (iii) optionally the second polyol; and
(II) from 1 wt. % to about 35 wt. % of a plasticizer based on the total wt. % of the adhesive composition,
wherein the adhesive composition is essentially free from diluent oils and solvents;wherein the viscosity of part (B) is at least 1,000 cps; andwherein the adhesive composition has a Shore hardness of greater than 20 A when fully cured.