Patent ID: 11931931
Assignee: CARIFLEX PTE. LTD.
Field: Other special machines (Mechanical engineering)
Classification: CPC B  A  C | IPC A  B  C

Claim 0:
1. A method for forming a dip-molded article comprising:
providing a mold for forming the dip-molded article;
dipping the mold into a first latex composition containing a cross-linker component selected from sulfur, organic peroxide, vulcanizing activator, vulcanizing accelerator, and mixtures thereof, forming a first layer;
dipping the mold having the first layer formed thereon into a second latex composition free of the cross-linker component, forming a laminated film with a second layer formed on the first layer;
curing the laminated film by heating to a temperature between 90° C. to 140° C.; and
removing the laminated film from the mold via inversion such that the second layer is inwards and the first layer is outwards,
wherein the first latex composition and the second latex composition are prepared from a same synthetic isoprene block copolymer, and
wherein the synthetic isoprene block copolymer has a general formula A-B-Y-(B-A)n, wherein (n+1) represents an average number of arms in a coupled polymer and n ranges from 1 to 6 and Y represents a residue of a coupling agent, A is formed by polymerization of mono-alkenyl arene monomers selected from the group consisting of styrene, α-methylstyrene, methylstyrenes other than α-methylstyrene, vinyl toluene, para-butylstyrene, ethylstyrene and vinylnapthalene, and B is a polymer block of a conjugated diene selected from the group consisting of 1,3-butadiene, substituted butadiene and mixtures thereof.