公开(公告)号：US12037485B2

公开(公告)日：2024-07-16

申请号：US17292886

申请日：2019-12-03

Applicant: CARIFLEX PTE. LTD.

Inventor： Adrie Van Der Huizen ,  Henk Van De Weg ,  Wouter De Jong ,  Maarten Tromp

IPC: C08L53/02 ,  C08J5/18

CPC classification number: C08L53/02 ,  C08J5/18 ,  C08J2353/02 ,  C08L2201/52 ,  C08L2203/16

Abstract: The disclosure relates to rubber latex formed from any of: branched block copolymers derived from alkenyl aromatic hydrocarbon—1,3-diene monomer system, and branched polyisoprene homopolymers derived from isoprene. The polymers in embodiments are obtained by polymerization in the presence of an anionic initiator; at a temperature from 0° C. to 100° C.; followed by coupling with a multifunctional coupling agent of formula (R1O)3Si—Y—Si(OR2)3, wherein R1 and R2 are independently C1-C6 alkyl groups; and Y is a C2-C8 alkylene group. The polymers are obtained as rubber cements having high solids content and low zero shear viscosities. The rubber cements are valuable for making latices for further applications.

公开(公告)号：US11859039B2

公开(公告)日：2024-01-02

申请号：US17309495

申请日：2019-12-03

Applicant: CARIFLEX PTE. LTD.

Inventor： Adrie van der Huizen ,  Wouter de Jong ,  Henk van de Weg ,  Maarten Tromp ,  Laurens Engelen

IPC: C08F297/04 ,  C08F8/42 ,  C08J5/18

CPC classification number: C08F297/044 ,  C08F8/42 ,  C08F297/046 ,  C08J5/18 ,  C08F2810/40 ,  C08J2353/02

Abstract: Branched block copolymers, derived from alkenyl aromatic hydrocarbon-1,3-diene monomer system, and branched polyisoprene homopolymers, derived from isoprene, are obtained by polymerization in the presence of an anionic initiator; at a temperature from 0° C. to 100° C.; followed by coupling with a multifunctional coupling agent of formula (R1O)3Si—Y—Si(OR2)3, wherein R1 and R2 are independently C1-C6 alkyl groups; and Y is a C2-C8 alkylene group. The polymers thus obtained can be used in many applications, including rubber cements having high solids content and low zero shear viscosities, and for producing aqueous latices therefrom.

公开(公告)号：US12043714B2

公开(公告)日：2024-07-23

申请号：US17292872

申请日：2019-12-03

Applicant: CARIFLEX PTE. LTD.

Inventor： Adrie Van Der Huizen ,  Henk Van De Weg ,  Wouter De Jong ,  Maarten Tromp

IPC: C08F136/08 ,  A41D19/00 ,  C08F293/00 ,  C08J5/18 ,  B29C41/00 ,  B29C41/14 ,  B29K7/00 ,  B29L31/00 ,  B29L31/48

CPC classification number: C08J5/18 ,  A41D19/0055 ,  C08F293/005 ,  B29C41/003 ,  B29C41/14 ,  B29K2007/00 ,  B29L2031/4864 ,  B29L2031/7538 ,  C08J2353/00

Abstract: Dipped formed latex articles with improved properties are formed from branched block copolymers, derived from alkenyl aromatic hydrocarbon—1,3-diene monomer system, and branched polyisoprene homopolymers, derived from isoprene. The polymers are obtained by polymerization in the presence of an anionic initiator; at a temperature from 0° C. to 100° C.; followed by coupling with a multifunctional coupling agent of formula (R1O)3Si—Y—Si(OR2)3, wherein R1 and R2 are independently C1-C6 alkyl groups; and Y is a C2-C8 alkylene group. The polymers are obtained as rubber cements having high solids content and low zero shear viscosities. The rubber cements are valuable for making latices and latex articles such as dipped goods, e.g., condoms, gloves, etc., with improved properties.