Tech Alerts March 2023
Abstracts that tickle this reviewer's interest
Courtesy of Google Scholar
Year - Month: 2023-03
F Fu, X Zhou, M Shen, D Wang, X Xu, S Shang, Z Song… - ACS Sustainable Chemistry …, 2023
… Herein, a benzocyclobutene-rosin modifier was designed and synthesized to
reduce the dielectric constant of epoxy resins. The recross-linking network of
benzocyclobutene inhibits the polarizability of the polar groups, and rosin skeletons …
X Zhang, Z Wei, L Yu - Reaction Chemistry & Engineering, 2023
We suprisingly found that, aldehydes could be employed as catalyst precursor for
the epoxidation reaction of β-ionone to produce 5,6-epoxy-β-ionone in as high as 83%
yield. Notably, the reaction was performed in water and molecular oxygen (O2) was …
D Cavuoto, L Ardemani, N Ravasio, F Zaccheria… - Catalysts, 2023
Levulinic acid and its esters are close to being extensively produced through
consolidated industrial processes, thus playing a central role in biobased industries
producing commodities within the principles of the circular economy. One of the …
Interpenetrating polymer network hydrogels for removal of synthetic dyes: A comprehensive review
M Ahmadian, M Jaymand - Coordination Chemistry Reviews, 2023
Abstract Treatment of wastewater containing synthetic dyes is essential owing to the
potential risks of organic dyes on the ecological environments and public health.
Consequently, the design and using of competent wastewater treatment …
[HTML]Design and Properties of NaturalRosin-Based Phosphoester Functional Surfactants
M Wang, X Yang, B Han, S Zhang, C Han, C Xia - Molecules, 2023
… (RETA) of maleic rosin was synthesized by introducing amine groups into rosin
resin acid [7]. … amine and ester groups into natural rosin to prepare a rosin-based
cationic surfactant (… introduced phosphate group into rosin resin acid and …
Tech Alerts March 29, 2023
Rubber composition for tires and pneumatic tire
United States Patent 11597822 B2 · Filed: 04/13/2018 · Published: 03/07/2023
Assignee:
SUMITOMO RUBBER INDUSTRIES, LTD. (Kobe, JP)
Inventors:
Kitaura, Takehiro (Kobe, JP)
Toya, Subaru (Kobe, JP)
Yoshiyasu, Hayato (Kobe, JP)
Yamada, Hiroaki (Kobe, JP)
This patent claims a typical tire rubber composition but with improved abrasion resistance due to the employ of tetrazines. The thinking is that the tetrazines interact with the rubber to increase abrasion resistance. Tetrazines are cyclic groups with 4 nitrogens per ring and 3 conjugated double bonds. This chemistry creates Diels-Alder reactions. The inventors also point out the benefits of terpene and DCPD resins in these compositions. Very interesting.
Packaging adhesives comprising low volatile tackifier compositions
United States Patent 11613675 B2 · Filed: 01/29/2020 · Published: 03/28/2023
Assignee:
Synthomer Adhesive Technologies LLC (Beachwood, OH, US)
Inventors:
Yuan, Bing (Methuen, MA, US)
Dickerson, James Palmer (Kingsport, TN, US)
Liew, Bee Kim (Kingsport, TN, US)
Osborne, Christopher Wayne (Johnson City, TN, US)
Siera, Jacobus (Hoogerheide, NL)
In one embodiment of the invention, a tackifier composition comprising at least one thermoplastic hydrocarbon resin and an antioxidant composition; wherein a portion of the volatile organic compounds in the thermoplastic hydrocarbon resin has been removed; wherein the antioxidant composition comprises at least one primary antioxidant and at least one secondary antioxidant; and wherein the levels of individual volatile organic compounds monitored of in the tackifier composition are less than about 0.5 ppm as measured by GC/MS headspace analysis as described in this disclosure.
The novelty of this invention is the Less Than 0.5 ppm Volatiles in the resin. This is similar achievement-wise to the technology that resulted in terpene-phenolics with <100 ppm volatiles including free phenol.
RUBBER COMPOSITION AND TIRE
European Patent Application EP4141062 A1 · Filed: 08/23/2022 · Published: 03/01/2023
Assignee:
GOODYEAR TIRE & RUBBER (Akron, OH 44316, US)
Inventors:
DELVILLE JEROME JOEL DANIEL (FR)
KANZ CARLO (LU)
STEINER PASCAL PATRICK (LU)
MILAN MARIE-LAURE STÉPHANIE (LU)
If you read this patent application carefully, you will see several key claims. There is improvement in all three of the properties of the magic triangle of tires. The preferred resin is a high softening alpha-pinene resin (terpene-phenolics are not preferred and hydrocarbon resins cannot provide the performance of alpha-pinene resins). The rubber-resin compositions can be loaded with silica, up to 190 phr and have good wet grip and still have good rolling resistance. A closer look at this application reveals some interesting physics and physical chemistry.
GUM BASES FROM RENEWABLE SOURCES
European Patent EP3316698 B1 · Filed: 06/30/2016 · Published: 03/15/2023
Assignee:
WRIGLEY W M JUN CO (Chicago, IL 60642, US)
Inventors:
PHILLIPS DAVID R (US)
MORGRET LES D (US)
A gum base which, when formulated into a chewing gum, provides a gum base composition made with synthetic elastomers and elastomers plasticizers obtained from “green” or renewable and sustainable resources.
This is a very good discussion on chewing gum /gum base technology.
Process for a continuous reaction with feedstocks derived from Bio-Renewable resources
United States Patent 11608450 B2 · Filed: 08/01/2020 · Published: 03/21/2023
Assignee:
Kraton Polymers LLC (Houston, TX, US)
Inventors:
Alfonso, Nicolas (Savannah, GA, US)
Irvine, Carl (Savannah, GA, US)
Miller, Jerrold H. (Savannah, GA, US)
Sullivan, David H. (Savannah, GA, US)
This patent discloses basic continuous processes to manufacture resin products, especially high viscosity materials that are common to the pine chemicals industry using continuous reaction technology. Several variants of the simple CSTR are presented that illustrate the breadth of this technology. I highly recommend taking the time to read this patent.
Courtesy of Kerry Thompson, Nelson Lawson, and the PCA.