US 12,479,945 B2
Crosslinked polymers of ethylene and monocyclic organosiloxane and process
Kainan Zhang, Shanghai (CN); Yabin Sun, Shanghai (CN); Jeffrey M. Cogen, Collegeville, PA (US); and Timothy J. Person, Collegeville, PA (US)
Assigned to Dow Global Technologies LLC, Midland, MI (US); and Dow Silicones Corporation, Midland, MI (US)
Appl. No. 18/007,231
Filed by Dow Global Technologies LLC, Midland, MI (US); and Dow Silicones Corporation, Midland, MI (US)
PCT Filed Jul. 29, 2020, PCT No. PCT/CN2020/105393
§ 371(c)(1), (2) Date Jan. 27, 2023,
PCT Pub. No. WO2022/021114, PCT Pub. Date Feb. 3, 2022.
Prior Publication US 2023/0303749 A1, Sep. 28, 2023
Int. Cl. C08F 255/02 (2006.01); C08G 77/42 (2006.01); C08K 5/14 (2006.01); C08K 5/3492 (2006.01)
CPC C08F 255/02 (2013.01) [C08G 77/42 (2013.01); C08K 5/14 (2013.01); C08K 5/34924 (2013.01)] 15 Claims
 
1. A process comprising:
providing (A) an ethylene/MOCOS copolymer comprising
(i) units derived from ethylene,
(ii) from 0.01 wt % to 0.5 wt % units derived from a comonomer, and
(iii) optionally units derived from a termonomer, and the comonomer is a monocyclic organosiloxane (MOCOS) of formula (I)
[R1,R2SiO2/2]n
wherein n is an integer greater than or equal to 3,
each R1 is independently a (C2-C4)alkenyl or a H2C═C(R1a)—C(═O)—O—(CH2)m—
wherein R1a is H or methyl;
m is an integer from 1 to 4; and
each R2 is independently H, (C1-C4)alkyl, phenyl, or R1;
mixing (B) a free radical initiator with (A) the ethylene/MOCOS copolymer to form a mixture;
heating the mixture; and
forming a crosslinkable ethylene/MOCOS copolymer composition.