US 11,987,704 B2
Method for preparing biodegradable latex composition for dip forming
Eunsoo Kang, Daejeon (KR); Jeong Weon Han, Daejeon (KR); and Sung Hun Choung, Daejeon (KR)
Assigned to Korea Kumho Petrochemical Co., Ltd., Seoul (KR)
Filed by Korea Kumho Petrochemical Co., Ltd., Seoul (KR)
Filed on Jun. 28, 2022, as Appl. No. 17/851,915.
Claims priority of application No. 10-2021-0091957 (KR), filed on Jul. 14, 2021.
Prior Publication US 2023/0054173 A1, Feb. 23, 2023
Int. Cl. C08L 9/04 (2006.01); A41D 19/00 (2006.01); C08F 2/26 (2006.01); C08F 220/06 (2006.01); C08L 3/02 (2006.01)
CPC C08L 9/04 (2013.01) [A41D 19/0055 (2013.01); C08F 2/26 (2013.01); C08F 220/06 (2013.01); C08L 3/02 (2013.01); C08L 2201/06 (2013.01); C08L 2201/52 (2013.01)] 9 Claims
 
1. A method for preparing a latex composition for dip forming,
the method comprising:
(a) preparing a raw monomer mixture comprising a conjugated diene-based monomer, an ethylenically unsaturated nitrile monomer and an ethylenically unsaturated acid monomer;
(b) generating a modified monomer mixture by introducing starch, an emulsifier and an inorganic solvent into the raw monomer mixture; and
(c) preparing a copolymer latex by introducing a polymerization initiator into the modified monomer mixture,
wherein the copolymer latex comprises the starch in a main chain thereof,
wherein the starch is dextrin, and
wherein a dextrose equivalent of the dextrin is 10 to 25.