content_image/923384.jpg
# •united States Patent [t9J 

# Lewis 

# I 54] ANTISTRUCTURE AGENT 

[ 75 I Inventor: Richard Newton Lewis, Tecumseh, Mich. 

I 73 I Assignee: SWS Silicones .Corporation, Adrian, Mich. 

(22] Filed: May 2, 1975 

[21] Appl. No.: 574,053 

[62] Division of Ser. No. 481,006, June 20, 1974, Pat. No. 3,925,285. 

I 52 I U.S. CI. ............................ 252/182; 260/37 SB; 260/46.5 R; 260/448.2 R; 260/448.2 S; 260/448.8 R 2 

I 51] Int. CI. $_{••••••••••••••••••••••• }$ C09K 3/00; C08L 0/00; C08G 77 /04; C07F 7 /02 

[58] Field of Search ................. 252/182; 260/37 SB, 260/448.8 R, 448.2 S, 448.2 R, 46.5 R 

## I 56] References Cited 

3,328,340 6/1967 Vanglm ........................... 260/37 SB 

## Related U.S. Application Data 

## UNITED ST A TES PA TENTS 

<img src='content_image/923384.jpg'>

Primary Examiner-Leland A. Sebastian 

Assistant Examiner-Donald P. Walsh 

## (57] ABSTRACT 

An antistructure agent consisting essentially of hexamethyltrisiloxanediol and methoxyhexamethyl› trisiloxanol is prepared by reacting hexamethylcyclo› trisiloxane with water, methanol and a short-chain fatty acid. It is very effective in preventing structure buildup in silicone elastomers. 

## S Claims, No Drawings 

# [I I] 3,956,166 

# I 451 May 11, 1976 

