Irradiation-curable polyolefin formulation
AssigneeDow Global Technologies LLC
InventorsYongyong Yang, Yabin Sun, Kainan Zhang, Jeffrey M. Cogen, Timothy J. Person, Paul J. Caronia
Life of this patent
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Abstract
An (electron beam)-curable (EBC) formulation comprising an EBC polyolefin compound having a crystallinity of from 0 to less than 50 weight percent (wt %) and/or having a density of 0.930 gram per cubic centimeter (g/cm3) or less; and an alkenyl-functional monocyclic organosiloxane (“silicon-based coagent”). Also included are a cured polyolefin product prepared by electron-beam irradiating the EBC formulation; methods of making and using the EBC formulation or cured polyolefin product; and articles containing or made from the EBC formulation or cured polyolefin product.
Claims9
An (electron beam)-curable (EBC) formulation comprising constituents (A) and (B):
- (A) an (electron beam)-curable (EBC) polyolefin compound having a crystallinity of from 0 to less than 50 weight percent (wt %) as measured by Crystallinity Test Method using differential scanning calorimetry (DSC) and having a density of 0.930 gram per cubic centimeter (g/cm3) or less as measured by ASTM D792-13, Method B;
- and
- (B) an alkenyl-functional monocyclic organosiloxane of formula (I):
- [R1,R2SiO2/2]n (I), wherein subscript n is an integer equal to 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;
- wherein (A) is 50.0 to 99.99 wt % and (B) is from 50.0 to 0.01 wt % of the combined weight of constituents (A) and (B);
- and
- with the proviso that the EBC formulation is free of each of a phosphazene base, a semi-crystalline polyolefin having a crystallinity of 50 wt % or greater, and an organic peroxide;
- and
- wherein the EBC formulation 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 EBC formulation 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).
Dependencies are inferred from the claim text.