	US 12,275,834 B2
	Methods of preparing a composite having elastomer and filler
Yakov E. Kutsovsky, Arlington, MA (US); Martin C. Green, Boxborough, MA (US); Ping Zhang, Westford, MA (US); Dhaval A. Doshi, Lexington, MA (US); Jiaxi Li, Nashua, NH (US); Michael D. Morris, Nashua, NH (US); Brian N. Hult, Arlington, MA (US); Ralph E. Dickinson, Dracut, MA (US); Irina S. Yurovskaya, Corpus Christi, TX (US); Frederick H. Rumpf, Billerica, MA (US); Satyan Choudhary, Billerica, MA (US); Hassan M. Ali, Andover, MA (US); Ani T. Nikova, Winchester, MA (US); Jincheng Xiong, Boxborough, MA (US); and Michael Beaulieu, Bolton, MA (US)
Assigned to Beyond Lotus LLC, Wilmington, DE (US)
Filed by Beyond Lotus LLC, Wilmington, DE (US)
Filed on Nov. 25, 2024, as Appl. No. 18/958,298.
Application 18/958,298 is a division of application No. 17/616,285, granted, now 12,209,170, previously published as PCT/US2020/036168, filed on Jun. 4, 2020.
Claims priority of provisional application 62/857,779, filed on Jun. 5, 2019.
Prior Publication US 2025/0084234 A1, Mar. 13, 2025
Int. Cl. C08K 3/36 (2006.01); B29B 7/48 (2006.01); B29B 7/72 (2006.01); B29B 7/74 (2006.01); B29B 7/82 (2006.01); B29B 7/90 (2006.01); B60C 1/00 (2006.01); B60C 11/00 (2006.01); C08K 3/04 (2006.01)

CPC C08K 3/36 (2013.01) [B29B 7/48 (2013.01); B29B 7/726 (2013.01); B29B 7/7495 (2013.01); B29B 7/823 (2013.01); B29B 7/826 (2013.01); B29B 7/90 (2013.01); B60C 1/0016 (2013.01); B60C 11/00 (2013.01); C08K 3/04 (2013.01); B60C 2011/0025 (2013.01); C08K 2201/006 (2013.01)]

9 Claims

1. A composite comprising a filler dispersed in an elastomer, wherein the filler comprises carbon black in an amount of at least 50% by weight relative to the total weight of the filler and the elastomer comprises at least 50% by weight of natural rubber relative to the total weight of the elastomer, and the composite has the following properties:

(a) the filler has a state of dispersion in the elastomer according to equation (1):

A≤1.25*B+x (1)

wherein:

A is d₉₀of the area-equivalent diameter (μm) of filler particles in the composite, and

wherein B≥1%,

A and B are determined by optical microscopy in transmission mode of microtomed sections, and

x is a number ranging from 15 to 20; and

(b) the composite has a property according to equation (2):

G′(0.1%)/G′(200%)≤0.1*G′(50%)−y (2)

wherein G′(0.1%) is a dynamic storage modulus measured at 0.1% strain amplitude, G′(200%) is a dynamic storage modulus measured at 200% strain amplitude, G′(50%) is a dynamic storage modulus measured at 50% strain amplitude, the dynamic storage modulus is measured at 100° C. at a frequency of 1 Hz, and y is a number ranging from 7 to 10.