content_image/926692.jpg content_image/926709.jpg content_image/926698.jpg content_image/926705.jpg
# (12) United States Patent 

# Bernard et al. 

# (54) CATALYST FOR ISOCYANATE CONDENSATION, COMPOSITION CONTAINING SAME, METHOD FOR USE, AND RESULTING COMPOSITIONS 

(75) Inventors: Jean-Marie Bernard, Mornant (FR); Damien Bonneau, Saint Clement (FR); Marc Visseau, Talant (FR) 

(73) Assignee: Rhodia Chimie, Boulogne-Billancourt Cedex (FR) 

( *) Notice: Subject to any disclaimer, the term of this patent is extended or adjusted under 35 U.S.C. 154(b) by O days. 

(21) Appl. No.: 10/450,261 

(22) PCT Filed: Dec.28,2001 

(86) PCT No.: § 371 (c)(l), PCT/FR0l/04228 (2), ( 4) Date: Jun. 12, 2003 

(87) PCT Pub. No.: WO02/053614 PCT Pub. Date: Jul. 11, 2002 

## (65) Prior Publication Data 

US 2004/0024212 Al Feb. 5, 2004 

## (30) Foreign Application Priority Data 

<img src='content_image/926692.jpg'>

(51) Int. Cl.7 ................................................ C08G 18/79 

(52) U.S. Cl. ........................ 528/73; 252/182.2; 528/45; 544/222 

(58) Field of Search ......................... 252/182.2; 528/45, 528/73; 544/222 

## (56) References Cited 

4,003,859 A 1/1977 Reymore et al. 

## U.S. PATENT DOCUMENTS 

<img src='content_image/926709.jpg'>

# (10) Patent No.: US 6,946,538 B2 

# (45) Date of Patent: Sep.20,2005 

<img src='content_image/926698.jpg'>

* cited by examiner 

Primary Examiner-Rachel Gorr 

(74) Attorney, Agent, or Firm-Burns, Doane, Swecker & Mathis, LLP 

## (57) ABSTRACT 

The invention concerns a method for catalytic ( cyclo) condensation of monomer isocyanates, characterised in that it comprises: a) reacting starting monomer isocyanates with a catalyst comprising a mineral or organic salt of a com› pound of formula (I), wherein y- is selected among: a negatively charged oxygen atom, and a carbonaceous radical comprising a negative charge borne by an atom of column VB of the periodic table or by an oxygen atom advanta› geously by a nitrogen atom and whereof the bond with the silicon of formula (I) is borne by an atom of column VB of the periodic table, advantageously by a nitrogen atom; wherein R$_{1}$ , R$_{2 }$ and R$_{3}$ , identical or different, represent a monovalent hydrocarbon radical having advantageously 1 to 30 carbon atoms, or a precursor of said compound, at a temperature of at least 20° C. and advantageously of at least 40° C. and not more than 200° C., advantageously not more than 150° C.; b) stopping the ( cyclo )condensation reaction at the desired transformation rate; and c) optionally eliminating unreacted monomers or the reaction with other reactive compounds with the isocyanate function. 

<img src='content_image/926705.jpg'>

US006946538B2 

## 40 Claims, No Drawings 

(I) 

