US 11,236,217 B2 · Modified resins and uses thereof

Abstract

Modified thermoplastic hydrocarbon thermoplastic resins are provided, as well as methods of their manufacture and uses thereof in rubber compositions. The modified thermoplastic resins are modified by decreasing the relative quantity of the dimer, trimer, tetramer, and pentamer oligomers as compared to the corresponding unmodified thermoplastic resin polymers, resulting in a product that exhibits a greater shift in the glass transition temperature of the elastomer(s) used in tire formulations. This translates to better viscoelastic predictors of tire tread performance, such as wet grip and rolling resistance. The modified thermoplastic resins impart remarkable properties on various rubber compositions, such as tires, belts, hoses, brakes, and the like. Automobile tires incorporating the modified thermoplastic resins are shown to possess excellent results in balancing the properties of rolling resistance, tire wear, snow performance, and wet braking performance.

Claims15

Dependent claims

A vulcanized rubber composition, comprising:

an elastomer,
a filler, and
a modified thermoplastic resin prepared by polymerization of one or more monomers,
wherein the modified thermoplastic resin comprises less than or equal to 55 wt % oligomers by gel permeation chromatography (GPC), or less than or equal to 38 wt % by high resolution thermogravimetric analysis (TGA),
wherein oligomers consist of dimers, trimers, tetramers, pentamers, or a mixture thereof, of the one or more monomers.

2 more elements

A vulcanized rubber composition, comprising:

an elastomer,
a filler, and
a modified thermoplastic resin prepared by polymerization of one or more monomers,
wherein the modified thermoplastic resin possesses the properties of formula I:
S
=
(
T
g
M
z
)
/
[
Oligomer
⁢
×
(
1
-
T
10
T
max
)
]
I
wherein Tg is the glass transition temperature of the modified thermoplastic resin;
wherein Mz is the z-average molecular weight of the modified thermoplastic resin;
wherein Oligomer is the fraction of oligomer present in the modified thermoplastic resin as measured by high resolution thermal gravimetric analysis (TGA) or gel permeation chromatography (GPC);
wherein T10 is the temperature at which the modified thermoplastic resin loses about 10% of its weight as measured by high resolution TGA;
wherein Tmax is the temperature of the maximum first derivative value of the modified thermoplastic resin as measured by high resolution TGA;
wherein oligomers consist of dimers, trimers, tetramer, and pentamer species of the one or more monomers;
wherein the value of S is greater than or equal to 2 and less than 50,000 when Oligomer is determined by GPC, or greater than or equal to 5 and less than 10,000 when Oligomer is determined by high resolution TGA;
and
wherein the value of Mz is less than or equal to 9,000 g/mol.

33 more elements

Dependencies are inferred from the claim text.

Facts

Application

16/498,496Filed 2 Apr 2018 · us provisional application

Priority

3 Apr 2017

Published

US 2020/0325309 A115 Oct 2020

Granted

1 Feb 2022

Term ends

Not estimatedThe source records don’t support an estimate.

Classification16 codes

C08L 9/00
Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
C08L 9/06
Compositions of homopolymers or copolymers of conjugated diene hydrocarbons: copolymers with styrene
B60C 1/0016
Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition: compositions of the tread
B60C 1/0025
Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition: compositions of the sidewalls

Modified resins and uses thereof

Life of this patent

Modified resins and uses thereof

Life of this patent

Abstract

Claims15