Patent US4373041A successfully refreshed from Google Patents.
US4373041A
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Rubber compositions containing silica and tackifier resins
Assignee: TotalEnergies Onetech Belgium SA
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Filing: 1981-10-29
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Granted: 1983-02-08
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Expires: 2001-10-29
Abstract
Abstract Tackifying resins, such as rosin esters, hydrogenated rosin esters, and terpene resins, are used as promoters for silica-filled rubber compositions to improve the physical properties, such as tensile, hysteresis, etc., of the rubber.
Inventors
- 👤 Jerold D. Wood
- 👤 Carl J. Stacy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:13
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/54; C08K5/548; C08L; C08L21/00; C08L9/00; C08L9/06; C08K3/00; C08K3/34; C08K3/36; C08K5/04; C08K5/10; C08K5/101; C08K5/103; C08L93/00
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
88 words
A silica-containing vulcanizable composition comprising (a) a vulcanizable natural or synthetic rubber, (b) a siliceous filler in an amount ranging from about 5 to about 150 parts by weight per hundred parts by weight of rubber (phr), and (c) at least one tackifying resin selected from rosin esters, hydrogenated rosin esters, and terpene resins in a minor but effective amount sufficient to increase the bonding of said siliceous filler to said rubber and improve the physical properties of the resulting rubber product, including tensile, hysteresis, and the like.
Claim 2
Dependent Claim
88 words
A silica-containing vulcanizable composition comprising (a) a vulcanizable natural or synthetic rubber, (b) a siliceous filler in an amount ranging from about 5 to about 150 parts by weight per hundred parts by weight of rubber (phr), and (c) at least one tackifying resin selected from rosin esters, hydrogenated rosin esters, and terpene resins in a minor but effective amount sufficient to increase the bonding of said siliceous filler to said rubber and improve the physical properties of the resulting rubber product, including tensile, hysteresis, and the like.
Claim 3
Dependent Claim
14 words
A composition according to claim 1 which additionally contains (d) a thioalkoxy-silane coupling agent.
Claim 4
Dependent Claim
10 words
The product obtained by curing the composition of claim 1.
Claim 5
Dependent Claim
15 words
A composition according to claim 1 wherein (a) is a polymer of a conjugated diene.
Claim 6
Dependent Claim
23 words
A composition according to claim 1 wherein (a) is a sulfur curable polymer and the composition includes sulfur or a sulfur yielding material.
Claim 7
Dependent Claim
6 words
A cured product of claim 5.
Claim 8
Dependent Claim
18 words
A composition according to claim 1 including sulfur, a cure accelerator, processing aids, and light and ozone stabilizers.
Claim 9
Dependent Claim
39 words
A composition according to claim 1 wherein, based upon 100 parts of (a), the amount of (b) present ranges from about 20 to about 80 phr and the amount of (c) ranges from about 2 to about 30 phr.
Claim 10
Dependent Claim
27 words
A composition according to claim 1 wherein (a) is a butadiene/styrene copolymer, (b) is a precipitated hydrated silica, and (c) is a glycerol ester of hydrogenated rosin.
Claim 11
Dependent Claim
27 words
A composition according to claim 1 wherein (a) is a butadiene/styrene copolymer, (b) is a precipitated hydrated silica, and (c) is a pentarythritol ester of hydrogenated rosin.
Claim 12
Dependent Claim
49 words
A composition according to claim 1 wherein (a) is a butadiene/styrene copolymer, (b) is a precipitated hydrated silica, and (c) is a synthetic dipentene polyterpene resin having a softening point of about 100° C., an acid number of less than one (1), and a molecular weight of about 1200.
Claim 13
Dependent Claim
47 words
A composition according to claim 1 wherein (a) is a butadiene/styrene copolymer, (b) is a precipitated hydrated silica, and (c) is a poly(alpha-pinene) resin having a softening point of about 115° C., an acid number of less than one (1), and a specific gravity of about 0.97.
Claim 14
Dependent Claim
71 words
A process for enhancing the effectiveness of silica-containing materials as reinforcing fillers and the physical properties of vulcanizable rubber compositions containing same which comprises effectively bonding said silica-containing material to the rubber by incorporating therein a promoting amount of at least one tackifying resin selected from rosin esters, hydrogenated rosin esters, and terpene resins, which amount is sufficient to improve the tensile and hysteresis and other physical properties of the rubber.
Claim 15
Dependent Claim
71 words
A process for enhancing the effectiveness of silica-containing materials as reinforcing fillers and the physical properties of vulcanizable rubber compositions containing same which comprises effectively bonding said silica-containing material to the rubber by incorporating therein a promoting amount of at least one tackifying resin selected from rosin esters, hydrogenated rosin esters, and terpene resins, which amount is sufficient to improve the tensile and hysteresis and other physical properties of the rubber.
Claim 16
Dependent Claim
25 words
A process according to claim 13 wherein the amount of tackifying resin incorporated into the rubber composition ranges from about 2 to about 30 phr.
Claim 17
Dependent Claim
14 words
A process according to claim 13 wherein the rubber is a conjugated diene rubber.
Claim 18
Dependent Claim
21 words
A process according to claim 13 wherein said rubber is a butadiene/styrene copolymer and said silica is a precipitated hydrated silica.
Claim 19
Dependent Claim
17 words
A process according to claim 16 wherein said tackifying resin is a glycerol ester of hydrogenated rosin.
Claim 20
Dependent Claim
17 words
A process according to claim 16 wherein said tackifying resin is a pentarythritol ester of hydrogenated rosin.
Claim 21
Dependent Claim
39 words
A process according to claim 16 wherein said tackifying resin is a synthetic dipentene polyterpene resin having a softening point of about 100° C., an acid number of less than one (1), and a molecular weight of about 1200.
Claim 22
Dependent Claim
37 words
A process according to claim 16 wherein said tackifying resin is a poly(alpha-pinene) resin having a softening point of about 115° C., an acid number of less than one (1), and a specific gravity of about 0.97.
Claim 23
Dependent Claim
15 words
A composition according to claim 1 wherein said tackifying resin is a hydrogenated rosin ester.
Claim 24
Dependent Claim
14 words
A composition according to claim 1 wherein said tackifying resin is a terpene resin.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-02-07 | 1986-08-09 | 1987-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-07 | 1990-08-09 | 1991-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-07 | 1994-08-09 | 1995-02-08 | $7700.00 | Window Closed / Lapsed |