US 12,409,255 B2
Synthetic polyisoprene latex condoms with reduced nitrosamine
Pathompong Chupayak, Chonburi (TH); Theeraphol Piachan, Chonburi (TH); Supparat Piachan, Chonburi (TH); Brian Youichi Kempimook, Chonburi (TH); Punyawat Chupayak, Chonburi (TH); Waranyu Dararattanaroj, Chonburi (TH); Dave Narasimhan, Flemington, NJ (US); and Sudarshan Narasimhan, Flemington, NJ (US)
Assigned to Thai Nippon Rubber Industry Public Company Limited, Chonburi (TH)
Filed by Thai Nippon Rubber Industry Public Company Limited, Chonburi (TH)
Filed on Oct. 22, 2020, as Appl. No. 17/077,453.
Prior Publication US 2022/0125999 A1, Apr. 28, 2022
Int. Cl. A61L 31/04 (2006.01); A61F 6/04 (2006.01); C08K 3/06 (2006.01); C08K 5/42 (2006.01)
CPC A61L 31/049 (2013.01) [A61F 6/04 (2013.01); C08K 3/06 (2013.01); C08K 5/42 (2013.01); A61L 2420/02 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A condom comprising: a. a latex synthesized from a pre-vulcanized latex emulsion, comprising: i. pre-vulcanized synthetic polyisoprene latex having a swelling index from 100% to 130%; ii. accelerators, each containing nitrogen, including: 1. zinc diethyldithiocarbamate; 2. zinc dibenzyldithiocarbamate; 3. zinc dibutyldithiocarbamate; and iii. an anionic surfactant wherein the anionic surfactant is sodium C14-17 alkyl sec sulfonate selected from the group consisting of alkyl sulphonates, alkyl aryl sulphonates, olefin sulphonates, and alcohol sulphates; and iv. water, wherein said condom has strength, is highly stretchable up to and about 900%, and wherein the condom releases less than 10 ppb (parts per billion) of nitrosamine and the condom contains nitrogen.