Processes to control fouling and improve compositions
Improved reaction processes comprise reacting a mixture to form a product comprising a metal alkyl, metal oxide, or mixture thereof and then passing said product to a post-reactor heat exchanger. The improvement comprises one or more of the following: (1) reacting said metal alkyl compound with an acid to produce a soluble metal ester; or (2) adding an ionic surfactant; or (3) adding a mixture comprising an antioxidant to the product under conditions sufficient to avoid formation of significant amounts of insoluble metal or metal compounds derived from said metal alkyl compound; or (4) purging said post-reactor heat exchanger with an inert gas under conditions to remove metal oxide from the post-reactor heat exchanger.
1. A composition comprising:
(1) an ethylene/α-olefin multiblock interpolymer which comprises:
at least 50 mole percent ethylene and is characterized by multiple blocks or segments of two or more polymerized monomer units differing in chemical or physical properties;
(2) a metal ester having the formula Zn 4 O(CnH 2n+1 CO 2 ) 6 wherein n is from 5 to 20, and the composition is characterized by a whiteness index from 50 to 100.
2. The composition of claim 1 wherein the composition has a whiteness index of from 70 to 100.
3. A composition comprising:
(1) an ethylene/α-olefin multiblock interpolymer which comprises at least 50 mole percent ethylene and is characterized by multiple blocks or segments of two or more polymerized monomer units differing in chemical or physical properties;
(2) a metal ester having the formula Zn 4 O(CnH 2n+1 CO 2 ) 6 wherein n is from 5 to 20, and the composition is characterized by a whiteness index of about 50.
4. The composition of claim 3 wherein the composition comprises less than 100 ppm metal oxide.
5. The composition of claim 3 wherein the composition comprises less than 50 ppm zinc oxide.
6. The composition of claim 3 wherein the composition comprises less than 10 ppm zinc oxide.