US2010203249A1PendingUtilityA1

Two-part liquid shim compositions

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Assignee: 3M INNOVATIVE PROPERTIES COPriority: Feb 9, 2009Filed: Feb 9, 2010Published: Aug 12, 2010
Est. expiryFeb 9, 2029(~2.5 yrs left)· nominal 20-yr term from priority
Inventors:Sohaib Elgimiabi
C08G 59/184C08G 59/3227C08G 59/50C08G 59/56B29K 2105/20C08G 2650/50C08G 59/54C08L 63/00C08K 5/17C08G 59/504C08G 59/60B29C 70/845C09D 163/00B29K 2063/00
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Claims

Abstract

Epoxy curatives and two-part compositions comprising epoxy curative and epoxy resin parts are provided as well as methods of their use in liquid shim applications. Epoxy curatives comprise at least one cycloaliphatic polyamine curative and at least one second curative selected from a) an aliphatic polyamidoamine and b) an adduct of an excess of an unbranched polyetherdiamine with an epoxy resin.

Claims

exact text as granted — not AI-modified
1 . An epoxy curative comprising at least one cycloaliphatic polyamine curative and at least one second curative selected from a) an aliphatic polyamidoamine and b) an adduct of an excess of an unbranched polyetherdiamine with an epoxy resin. 
   
   
       2 . The epoxy curative according to  claim 1  wherein the at least one second curative is a) an aliphatic polyamidoamine. 
   
   
       3 . The epoxy curative according to  claim 1  wherein the at least one second curative is b) an adduct of an excess of an unbranched polyetherdiamine with an epoxy resin. 
   
   
       4 . The epoxy curative according to  claim 3  wherein the unbranched polyetherdiamine is a compound according to Formula I:
   H 2 N—[(CH 2 ) x O] y —(CH 2 ) x —NH 2    [I]   
     where y is 1, 2, 3 or 4, and where each x is independently selected from 2, 3, or 4. 
   
   
       5 . The epoxy curative according to  claim 3  wherein the adduct of an excess of an unbranched polyetherdiamine with an epoxy resin is an adduct of between 2 and 8 parts unbranched polyetherdiamine per part of epoxy resin. 
   
   
       6 . The epoxy curative according to  claim 4  wherein the adduct of an excess of an unbranched polyetherdiamine with an epoxy resin is an adduct of between 2 and 8 parts unbranched polyetherdiamine per part of epoxy resin. 
   
   
       7 . The epoxy curative according to  claim 1  wherein the epoxy curative additionally comprises at least one calcium nitrate accelerator. 
   
   
       8 . The epoxy curative according to  claim 1  wherein the epoxy curative comprises no particulate metal. 
   
   
       9 . A method of filling a gap comprising the steps of:
 a) mixing an epoxy component comprising an epoxy resin with an epoxy curative according to  claim 1  to make a mixture;   b) filling the gap with the mixture; and   c) allowing the mixture to cure.   
   
   
       10 . A method of filling a gap comprising the steps of:
 a) mixing an epoxy component comprising tetraglycidyl meta-xylenediamine with an epoxy curative according to  claim 2  to make a mixture;   b) filling the gap with the mixture; and   c) allowing the mixture to cure.   
   
   
       11 . A method of filling a gap comprising the steps of:
 a) mixing an epoxy component comprising an epoxy novolac resin with an epoxy curative according to  claim 3  to make a mixture;   b) filling the gap with the mixture; and   c) allowing the mixture to cure.   
   
   
       12 . The method according to  claim 9  wherein the epoxy component additionally comprises a core-shell impact modifier. 
   
   
       13 . The composition obtained by mixing and allowing to cure: a) an epoxy component comprising an epoxy resin and b) an epoxy curative according to  claim 1 . 
   
   
       14 . The composition obtained by mixing and allowing to cure: a) an epoxy component comprising an epoxy resin and b) an epoxy curative according to  claim 2 . 
   
   
       15 . The composition according to  claim 14  wherein the epoxy component comprises tetraglycidyl meta-xylenediamine. 
   
   
       16 . The composition obtained by mixing and allowing to cure: a) an epoxy component comprising an epoxy resin and b) an epoxy curative according to  claim 3 . 
   
   
       17 . The composition according to  claim 16  wherein the epoxy component comprises an epoxy novolac resin. 
   
   
       18 . The composition obtained by mixing and allowing to cure: a) an epoxy component comprising an epoxy resin and b) an epoxy curative according to  claim 4 . 
   
   
       19 . The composition obtained by mixing and allowing to cure: a) an epoxy component comprising an epoxy resin and b) an epoxy curative according to  claim 5 . 
   
   
       20 . The composition according to  claim 13  wherein the epoxy component additionally comprises a core-shell impact modifier.

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