•united  States  Patent  [t9J  Lewis  [I I]  3,956,166  I  451  May  11, 1976  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  I  51]  Int.  CI.  2 $_{••••••••••••••••••••••• }$ 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  Related  U.S.  Application  Data  I  56]  References  Cited  UNITED  ST A TES  PA  TENTS  3,328,340  6/1967  Vanglm  ...........................  260/37  SB  3,551,382  3,631,087  3,669,913  3,694,478  3,792,072  3,799,962  3,896,062  12/1970  12/1971  6/1972  9/1972  2/1974  3/1974  7  /1975  Schnurrbusch  ................  260/46.5  R  Lewis  ...........................  260/448.2  E  Morehouse  .........................  252/ 182  Adams  .........................  260/448.2  E  Lewis  ...........................  260/448.2  E  Lewis  ...........................  260/448.  8  R  Morehouse  .........................  252/ 182  Primary  Examiner-Leland  A.  Sebastian  Assistant  Examiner-Donald  P.  Walsh  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.  (57]  ABSTRACT  S  Claims,  No  Drawings 