US 11,667,735 B2
Polyolefin composition
Kainan Zhang, Shanghai (CN); Yabin Sun, Shanghai (CN); Jeffrey M. Cogen, Flemington, NJ (US); and Timothy J. Person, Pottstown, PA (US)
Assigned to Dow Global Technologies LLC, Midland, MI (US)
Filed by Dow Global Technologies LLC, Midland, MI (US)
Filed on Dec. 8, 2021, as Appl. No. 17/545,656.
Application 17/545,656 is a continuation of application No. 16/620,044, granted, now 11,261,272, previously published as PCT/CN2017/102074, filed on Sep. 18, 2017.
Claims priority of application No. PCT/CN2017/090770 (WO), filed on Jun. 29, 2017.
Prior Publication US 2022/0098337 A1, Mar. 31, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. C08F 110/02 (2006.01); C09D 7/63 (2018.01); C08K 5/14 (2006.01); C09D 5/00 (2006.01); C09D 123/26 (2006.01); H01B 3/44 (2006.01); C08F 10/02 (2006.01); C08J 3/28 (2006.01); H01B 13/00 (2006.01); C08L 23/26 (2006.01); H01B 7/282 (2006.01); H01B 7/295 (2006.01); C08L 23/06 (2006.01); C08L 23/04 (2006.01)
CPC C08F 110/02 (2013.01) [C08F 10/02 (2013.01); C08J 3/28 (2013.01); C08K 5/14 (2013.01); C08L 23/26 (2013.01); C09D 5/00 (2013.01); C09D 7/63 (2018.01); C09D 123/26 (2013.01); H01B 3/441 (2013.01); H01B 13/0016 (2013.01); C08F 2810/20 (2013.01); C08J 2323/06 (2013.01); C08L 23/04 (2013.01); C08L 23/06 (2013.01); C08L 2023/44 (2013.01); C08L 2205/025 (2013.01); C08L 2207/066 (2013.01); C08L 2312/08 (2013.01); H01B 7/282 (2013.01); H01B 7/295 (2013.01)] 7 Claims
 
1. A method of free-radical curing a polyolefin composition to make a crosslinked polyolefin product, wherein the polyolefin composition comprises:
(A) a polyolefin polymer that is a low density polyethylene (LDPE) polymer comprising 50 to 100 weight percent (wt %) ethylenic monomeric units, 50 to 0 wt % (C3-C20)alpha-olefin-derived comonomeric units, and 20 to 0 wt % diene comonomeric units, wherein total weight percent is 100.00 wt %;
(B) a monocyclic organosiloxane of formula (I): [R1,R2SiO2/2]n (I), wherein subscript n is 4; each R1 is independently a (C2-C4)alkenyl or a H2C═C(R1a)—C(═O)—O—(CH2)m— wherein R1a is H or methyl and subscript m is an integer from 1 to 4; and each R2 is independently H, (C1-C4)alkyl, phenyl, or R1; and
(C) an organic peroxide;
with the proviso that the polyolefin composition is free of a phosphazene base; and with the proviso that the (A) polyolefin composition does not contain 24 wt % or more of an inorganic filler selected from the group consisting of aluminum oxide, aluminum silicate, calcium silicate, magnesium silicate, silica, titanium dioxide, and mixtures thereof; and
wherein the (B) monocyclic organosiloxane of formula (I) is described by any one of limitations (i) to (x): (i) each R1 is independently a (C2-C3)alkenyl; and each R2 is independently H, (C1-C2)alkyl, or (C2-C3)alkenyl; (ii) each R1 is vinyl; and each R2 is independently (C1-C2)alkyl; (iii) each R1 is vinyl; and each R2 is methyl; (iv) each R1 is allyl; and each R2 is independently (C1-C2)alkyl; (v) each R1 is allyl; and each R2 is methyl; (vi) each R1 is independently H2C═C(R1a)—C(═O)—O—(CH2)m— wherein R1a is H or methyl and subscript m is an integer from 1 to 4; and each R2 is independently H, (C1-C2)alkyl, or (C2-C3)alkenyl; (vii) each R1 is independently H2C═C(R1a)—C(═O)—O—(CH2)m— wherein R1a is H and subscript m is 3; and each R2 is independently (C1-C2)alkyl; (viii) each R1 is independently H2C═C(R1a)—C(═O)—O—(CH2)m— wherein R1a is methyl and subscript m is 3; and each R2 is independently (C1-C2)alkyl; (ix) the polyolefin composition does not contain 24 wt % or more of any inorganic filler;
and (x) a combination of limitation (ix) and any one of limitations (i) to (viii), the method comprising heating the polyolefin composition at a curing effective temperature with (C) an organic peroxide in such a way so as to react the (A) polyolefin polymer with the (B) monocyclic organosiloxane of formula (I), thereby making a crosslinked polyolefin product.