Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1994-04-28
1995-06-20
Szekely, Peter A.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
524592, 524602, 524612, 524906, 525425, 525471, 525939, C08K 304, C08F 832, C08F 1636
Patent
active
054261481
ABSTRACT:
A fast-curing sealant composition is made from generally liquid oligomers and has good tensile strength, one hundred percent modulus, Shore-A Hardness, and good insensitivity to water. One part of the sealant composition is generally a polyester or polyether oligomer having acetoacetate end groups or functionalities thereon, whereas the second part is also generally a polyester of polyether oligomer generally containing primary amine end groups or functions. The oligomers are generally of a low molecular weight, as from about 500 to about 10,000, and are modified by compounding with various additives such as carbon black, antioxidants, ultraviolet light inhibitors, and the like. Polyfunctional acetoacetate-terminated molecules having 3 or more functional end groups or polyfunctional primary amine-terminated molecules having 3 or more functional end groups serve to increase the crosslink density and modulus of the compositions. The sealant can be used as a coating or as a caulking type compound. One preferred application is automotive windshield sealant.
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An article entitled "High Solids Multifunctional Polyols," Eslinger, Delano R., and Ryer, Dennis, from Paint and Coatings Ind., vol. 7, No. 2, pp. 34 and 36, (1991).
An article entitled "Michael Addition Polymers From 1,4 and 1,3 Benzenedimethanol Diacetoacetates and Tripropylene Glycol Diacrylate," Trumbo, David L., from Polymer Bulletin, 26 pp. 265-270 (1991).
Dureska David P.
Evanina Gunther J.
Szekely Peter A.
Tremco Inc.
Yoon Tae H.
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