Patent US5753761A successfully refreshed from Google Patents.
US5753761A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing trans polybutadiene blend for use in tires
Assignee: Goodyear Tire and Rubber Co
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Filing: 1996-12-27
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Granted: 1998-05-19
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Expires: 2016-12-27
Abstract
Abstract The present invention relates to the utilization of trans 1,4-polybutadiene resin having a melting point of at least 30° C. in rubber compositions. The invention, in one aspect, relates to replacing, or at least partially replacing, natural rubber with a pre-blend of trans 1,4-polybutadiene resin and synthetic cis 1,4-polyisoprene rubber. The invention particularly relates to preparation and utilization of a pre-blend of trans 1,4-polybutadiene resin and synthetic cis 1,4-polyisoprene rubber by blending individual polymerizate cements, drying the pre-blend, and use of such pre-blend in the preparation of rubber compositions and of manufactured products such as, for example, tires.
Inventors
- 👤 Paul Harry Sandstrom
- 👤 David John Zanzig
- 👤 Nissim Calderon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:34
CPC Classifications
C; C08; C08L; C08L9/00; B; B60; B60C; B60C1/00; C08L9/06; C08K; C08K3/00; C08K3/34; C08K3/36; C08L7/00; Y; Y10; Y10T; Y10T152/00; Y10T152/10; Y10T152/10495
Claims Analysis
Total Claims: 40
Claim 1
Independent Claim
91 words
A method of preparing an elastomer composition which comprises the steps of (A) blending (i) a polymerizate cement of trans 1,4-polybutadiene resin having at least one melting point within a range of about 30° C. to about 50° C. with (ii) a polymerizate cement of synthetic cis 1,4-polyisoprene elastomer having a cis 1,4-content of at least 90 percent followed by (B) drying and recovering said blend; wherein the weight ratio of trans 1,4-polybutadiene resin to cis 1,4-polyisoprene rubber in said blend is in a range of about 25/75 to about 75/25.
Claim 2
Independent Claim
91 words
A method of preparing an elastomer composition which comprises the steps of (A) blending (i) a polymerizate cement of trans 1,4-polybutadiene resin having at least one melting point within a range of about 30° C. to about 50° C. with (ii) a polymerizate cement of synthetic cis 1,4-polyisoprene elastomer having a cis 1,4-content of at least 90 percent followed by (B) drying and recovering said blend; wherein the weight ratio of trans 1,4-polybutadiene resin to cis 1,4-polyisoprene rubber in said blend is in a range of about 25/75 to about 75/25.
Claim 3
Dependent Claim
50 words
The method of claim 1 wherein said trans 1,4-polybutadiene resin has a microstructure characterized by having a trans 1,4- content of about 80 to about 90 percent, a vinyl 1,2- content of about 10 to about 15 percent and a cis 1,4- content of about 1 to about 5 percent.
Claim 4
Dependent Claim
22 words
The method of claim 2 wherein said trans 1,4-polybutadiene resin has a melting point of about 38° C. to about 42° C.
Claim 5
Dependent Claim
23 words
The method of claim 2 wherein said trans 1,4-polybutadiene resin has a molecular weight number average (Mn) of about 150,000 to about 210,000.
Claim 6
Dependent Claim
22 words
The method of claim 3 wherein said trans 1,4-polybutadiene resin has a molecular weight number (Mn) of about 150,000 to about 210,000.
Claim 7
Independent Claim
129 words
A method of preparing 100 parts by weight of a rubber composition which comprises (a) preparing an elastomer composition pre-blend by the steps of blending (i) a polymerizate cement of trans 1,4-polybutadiene resin having at least one melting point within a range of about 30° C. to about 50° C. with (ii) a polymerizate cement of synthetic cis 1,4-polyisoprene elastomer followed by (b) drying and recovering said pre-blend; wherein the weight ratio of trans 1,4-polybutadiene resin to cis 1,4-polyisoprene rubber is in a range of about 25/75 to about 75/25 in said pre-blend, and (c) mixing about 25 to about 75 parts by weight of said elastomer composition pre-blend with about 75 to about 25 parts by weight of at least one additional diene-based elastomer in an internal mixer.
Claim 8
Independent Claim
129 words
A method of preparing 100 parts by weight of a rubber composition which comprises (a) preparing an elastomer composition pre-blend by the steps of blending (i) a polymerizate cement of trans 1,4-polybutadiene resin having at least one melting point within a range of about 30° C. to about 50° C. with (ii) a polymerizate cement of synthetic cis 1,4-polyisoprene elastomer followed by (b) drying and recovering said pre-blend; wherein the weight ratio of trans 1,4-polybutadiene resin to cis 1,4-polyisoprene rubber is in a range of about 25/75 to about 75/25 in said pre-blend, and (c) mixing about 25 to about 75 parts by weight of said elastomer composition pre-blend with about 75 to about 25 parts by weight of at least one additional diene-based elastomer in an internal mixer.
Claim 9
Dependent Claim
33 words
The method of claim 6 wherein said elastomer composition pre-blend is introduced into said internal mixer at a temperature of said pre-blend in a range of about 20° C. to about 30° C.
Claim 10
Dependent Claim
47 words
The method of claim 6 wherein said trans 1,4-polybutadiene resin has a microstructure characterized by having a trans 1,4-content of about 80 to about 90 percent, a vinyl 1,2-content of about 10 to about 15 percent and a cis 1,4-content of about 1 to about 5 percent.
Claim 11
Dependent Claim
22 words
The method of claim 8 wherein said trans 1,4-polybutadiene resin has a melting point of about 38° C. to about 42° C.
Claim 12
Dependent Claim
23 words
The method of claim 8 wherein said trans 1,4-polybutadiene resin has a molecular weight number average (Mn) of about 150,000 to about 210,000.
Claim 13
Dependent Claim
22 words
The method of claim 9 wherein said trans 1,4-polybutadiene resin has a molecular weight number (Mn) of about 150,000 to about 210,000.
Claim 14
Dependent Claim
56 words
The method of claim 6 wherein the said additional diene-based elastomer is selected from at least one of cis 1,4-polybutadiene rubber, cis 1,4-polyisoprene rubber (natural and/or synthetic), copolymers of conjugated dienes selected from 1,3-butadiene and isoprene and copolymers of conjugated dienes selected from 1,3-butadiene and isoprene with a vinyl aromatic compound selected from styrene and alpha-methylstyrene.
Claim 15
Dependent Claim
56 words
The method of claim 8 wherein the said additional diene-based elastomer is selected from at least one of cis 1,4-polybutadiene rubber, cis 1,4-polyisoprene rubber (natural and/or synthetic), copolymers of conjugated dienes selected from 1,3-butadiene and isoprene and copolymers of conjugated dienes selected from 1,3-butadiene and isoprene with a vinyl aromatic compound selected from styrene and alpha-methylstyrene.
Claim 16
Dependent Claim
56 words
The method of claim 9 wherein the said additional diene-based elastomer is selected from at least one of cis 1,4-polybutadiene rubber, cis 1,4-polyisoprene rubber (natural and/or synthetic), copolymers of conjugated dienes selected from 1,3-butadiene and isoprene and copolymers of conjugated dienes selected from 1,3-butadiene and isoprene with a vinyl aromatic compound selected from styrene and alpha-methylstyrene.
Claim 17
Dependent Claim
56 words
The method of claim 10 wherein the said additional diene-based elastomer is selected from at least one of cis 1,4-polybutadiene rubber, cis 1,4-polyisoprene rubber (natural and/or synthetic), copolymers of conjugated dienes selected from 1,3-butadiene and isoprene and copolymers of conjugated dienes selected from 1,3-butadiene and isoprene with a vinyl aromatic compound selected from styrene and alpha-methylstyrene.
Claim 18
Dependent Claim
56 words
The method of claim 11 wherein the said additional diene-based elastomer is selected from at least one of cis 1,4-polybutadiene rubber, cis 1,4-polyisoprene rubber (natural and/or synthetic), copolymers of conjugated dienes selected from 1,3-butadiene and isoprene and copolymers of conjugated dienes selected from 1,3-butadiene and isoprene with a vinyl aromatic compound selected from styrene and alpha-methylstyrene.
Claim 19
Dependent Claim
36 words
A process of preparing a tire which comprises preparing a rubber composition according to claim 1, forming said prepared rubber composition as a tire component and building a tire with said component as a part thereof.
Claim 20
Dependent Claim
36 words
A process of preparing a tire which comprises preparing a rubber composition according to claim 6, forming said prepared rubber composition as a tire component and building a tire with said component as a part thereof.
Claim 21
Dependent Claim
36 words
A process of preparing a tire which comprises preparing a rubber composition according to claim 7, forming said prepared rubber composition as a tire component and building a tire with said component as a part thereof.
Claim 22
Dependent Claim
36 words
A process of preparing a tire which comprises preparing a rubber composition according to claim 8, forming said prepared rubber composition as a tire component and building a tire with said component as a part thereof.
Claim 23
Dependent Claim
36 words
A process of preparing a tire which comprises preparing a rubber composition according to claim 9, forming said prepared rubber composition as a tire component and building a tire with said component as a part thereof.
Claim 24
Dependent Claim
36 words
A process of preparing a tire which comprises preparing a rubber composition according to claim 10, forming said prepared rubber composition as a tire component and building a tire with said component as a part thereof.
Claim 25
Dependent Claim
36 words
A process of preparing a tire which comprises preparing a rubber composition according to claim 11, forming said prepared rubber composition as a tire component and building a tire with said component as a part thereof.
Claim 26
Dependent Claim
36 words
A process of preparing a tire which comprises preparing a rubber composition according to claim 12, forming said prepared rubber composition as a tire component and building a tire with said component as a part thereof.
Claim 27
Dependent Claim
36 words
A process of preparing a tire which comprises preparing a rubber composition according to claim 13, forming said prepared rubber composition as a tire component and building a tire with said component as a part thereof.
Claim 28
Dependent Claim
36 words
A process of preparing a tire which comprises preparing a rubber composition according to claim 14, forming said prepared rubber composition as a tire component and building a tire with said component as a part thereof.
Claim 29
Dependent Claim
36 words
A process of preparing a tire which comprises preparing a rubber composition according to claim 15, forming said prepared rubber composition as a tire component and building a tire with said component as a part thereof.
Claim 30
Dependent Claim
12 words
The process of claim 17 wherein said component is a tire tread.
Claim 31
Dependent Claim
12 words
The process of claim 18 wherein said component is a tire tread.
Claim 32
Dependent Claim
12 words
The process of claim 19 wherein said component is a tire tread.
Claim 33
Dependent Claim
12 words
The process of claim 20 wherein said component is a tire tread.
Claim 34
Dependent Claim
12 words
The process of claim 21 wherein said component is a tire tread.
Claim 35
Dependent Claim
12 words
The process of claim 22 wherein said component is a tire tread.
Claim 36
Dependent Claim
12 words
The process of claim 23 wherein said component is a tire tread.
Claim 37
Dependent Claim
12 words
The process of claim 24 wherein said component is a tire tread.
Claim 38
Dependent Claim
12 words
The process of claim 25 wherein said component is a tire tread.
Claim 39
Dependent Claim
12 words
The process of claim 26 wherein said component is a tire tread.
Claim 40
Dependent Claim
12 words
The process of claim 27 wherein said component is a tire tread.
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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) | 2001-05-18 | 2001-11-17 | 2002-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-05-18 | 2005-11-17 | 2006-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-05-18 | 2009-11-17 | 2010-05-19 | $7700.00 | Window Closed / Lapsed |