US 11,725,122 B2
Processes for making low volatile tackifier compositions
Bing Yuan, Methuen, MA (US); James Palmer Dickerson, Kingsport, TN (US); Bee Kim Liew, Kingsport, TN (US); Christopher Wayne Osborne, Johnson City, TN (US); and Jacobus Siera, Hoogerheide (NL)
Assigned to Synthomer Adhesive Technologies LLC, Beachwood, OH (US)
Filed by Synthomer Adhesive Technologies LLC, Beachwood, OH (US)
Filed on Jan. 29, 2020, as Appl. No. 16/775,999.
Claims priority of provisional application 62/799,383, filed on Jan. 31, 2019.
Claims priority of provisional application 62/841,498, filed on May 1, 2019.
Claims priority of provisional application 62/841,507, filed on May 1, 2019.
Claims priority of provisional application 62/841,511, filed on May 1, 2019.
Claims priority of provisional application 62/841,515, filed on May 1, 2019.
Prior Publication US 2020/0248047 A1, Aug. 6, 2020
This patent is subject to a terminal disclaimer.
Int. Cl. C09J 7/35 (2018.01); C08L 53/02 (2006.01); C09J 11/08 (2006.01); C09J 11/06 (2006.01); C09J 123/26 (2006.01); A61L 15/20 (2006.01); A61L 15/58 (2006.01); A61L 15/22 (2006.01); C09J 153/02 (2006.01); C09J 153/00 (2006.01); C09J 123/08 (2006.01); C08K 5/17 (2006.01); C08L 91/06 (2006.01); C08K 3/013 (2018.01); C08K 5/00 (2006.01); C08K 5/3435 (2006.01); C08K 5/13 (2006.01); C08K 5/375 (2006.01); C08K 5/372 (2006.01); C08K 5/3492 (2006.01); C08K 5/134 (2006.01); C08K 5/52 (2006.01); C08K 5/5393 (2006.01); C09J 7/38 (2018.01); C08L 23/08 (2006.01); C08L 23/26 (2006.01); C08K 5/105 (2006.01); C08K 5/12 (2006.01)
CPC C09J 7/35 (2018.01) [A61L 15/20 (2013.01); A61L 15/225 (2013.01); A61L 15/585 (2013.01); C08K 3/013 (2018.01); C08K 5/0016 (2013.01); C08K 5/13 (2013.01); C08K 5/1345 (2013.01); C08K 5/17 (2013.01); C08K 5/3435 (2013.01); C08K 5/3492 (2013.01); C08K 5/372 (2013.01); C08K 5/375 (2013.01); C08K 5/52 (2013.01); C08K 5/5393 (2013.01); C08L 23/0853 (2013.01); C08L 23/26 (2013.01); C08L 53/02 (2013.01); C08L 91/06 (2013.01); C09J 7/381 (2018.01); C09J 11/06 (2013.01); C09J 11/08 (2013.01); C09J 123/0815 (2013.01); C09J 123/0853 (2013.01); C09J 123/26 (2013.01); C09J 153/00 (2013.01); C09J 153/02 (2013.01); C08K 5/005 (2013.01); C08K 5/105 (2013.01); C08K 5/12 (2013.01); C08K 5/34926 (2013.01); C09J 2301/408 (2020.08); C09J 2301/414 (2020.08); C09J 2453/00 (2013.01)] 13 Claims
 
1. A process for making a tackifier composition, said process comprising the following steps performed in the following order:
(a) polymerization of one or more monomers to form at least one partially or fully hydrogenated thermoplastic hydrocarbon resin;
(b) removing at least a portion of volatile organic compounds from the at least one thermoplastic hydrocarbon resin; and
(c) adding an antioxidant composition to said at least one thermoplastic hydrocarbon resin;
wherein the antioxidant composition comprises at least one primary antioxidant, at least one secondary antioxidant, and at least one hindered amine light stabilizer (HALS);
wherein said primary antioxidant is a hindered phenolic antioxidant or a secondary arylamine, and wherein said primary antioxidant is present in an amount of about 0.1% to about 1% based on the weight of the thermoplastic hydrocarbon resin;
wherein said secondary antioxidant is an organo-phosphite or a hydroxyl-amine, and wherein said secondary antioxidant is present in an amount of about 0.1% to about 1% based on the weight of said thermoplastic hydrocarbon resin;
wherein when said primary antioxidant is a hindered phenolic antioxidant, said secondary antioxidant is a hydroxyl-amine;
wherein when said secondary antioxidant is an organo-phosphite, then said primary antioxidant is a secondary arylamine;
wherein the antioxidant composition is added to the at least one thermoplastic resin both before and after step (b) to produce the tackifier composition;
wherein the levels of individual volatile organic compound in the tackifier composition are less than about 0.5 ppm as measured by GC/MS headspace analysis; and
wherein the amount of said HALS ranges from about 0.05% to about 0.5% by weight based on the weight of said at least one thermoplastic hydrocarbon resin.