US4440816A
Expired / Lapsed
US
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Rubber-modified asphalt composition
Assignee: Owens Corning
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Filing: 1982-03-22
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Granted: 1984-04-03
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Expires: 2002-03-22
Abstract
Abstract A rubber-modified asphalt composition prepared by reacting a bituminous material with (1) a polymerizable aromatic monomer and (2) a depolymerized rubber whereby the rubber is chemically integrated with the asphalt. The rubber-modified asphalt compositions of the invention can be used in the treatment of glass fibers as well as in road paving applications, roofing applications and the like.
Inventors
- 👤 William E. Uffner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:00
CPC Classifications
E; E01; E01C; E01C7/00; E01C7/08; E01C7/18; E01C7/26; E01C7/265; D; D06; D06N; D06N7/00; E01C11/00; E01C11/005; E01C11/16; E01C11/165; D06N2201/00; D06N2201/08; D06N2201/082; D06N2203/00; D06N2203/08; Y; Y10; Y10T; Y10T428/00; Y10T428/14; Y10T428/141; Y10T428/28; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2964; Y10T428/31504; Y10T428/31551; Y10T428/31641; Y10T428/31815; Y10T442/00; Y10T442/20; Y10T442/2738
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
51 words
A chemically-modified asphalt composition comprising an asphalt which has been reacted at a temperature sufficient to cause the reaction to proceed with (1) a polymerizable vinyl aromatic monomer and (2) a depolymerized rubber said depolymerized rubber being rubber which has been treated with a depolymerizing agent to decrease its molecular weight.
Claim 2
Dependent Claim
51 words
A chemically-modified asphalt composition comprising an asphalt which has been reacted at a temperature sufficient to cause the reaction to proceed with (1) a polymerizable vinyl aromatic monomer and (2) a depolymerized rubber said depolymerized rubber being rubber which has been treated with a depolymerizing agent to decrease its molecular weight.
Claim 3
Dependent Claim
40 words
A chemically-modified asphalt composition as defined in claim 1 wherein the asphalt to be reacted is an asphalt which has been pre-reacted with a modifying agent selected from the group consisting of steam, an oxygen-containing gas, ammonia and organic amines.
Claim 4
Dependent Claim
16 words
A chemically-modified asphalt composition as defined in claim 1 wherein the vinyl aromatic monomer is styrene.
Claim 5
Dependent Claim
16 words
A chemically-modified asphalt composition as defined in claim 1 wherein the composition includes a terpene resin.
Claim 6
Dependent Claim
46 words
A chemically-modified asphalt composition as defined in claim 1 wherein the reaction takes place in the presence of a non-depolymerization rubber selected from the group consisting of homopolymers of conjugated dienes and copolymers formed of a conjugated diene and at least one ethylenic monomer copolymerizable therewith.
Claim 7
Dependent Claim
28 words
A chemically-modified asphalt composition as defined in claim 1 wherein the depolymerized rubber is selected from the group consisting of depolymerized natural rubber and depolymerized conjugated diene polymers.
Claim 8
Dependent Claim
62 words
A chemically-modified asphalt composition as defined in claim 1 wherein the vinyl aromatic monomer has the formula: ##STR4## wherein R 1 is an aromatic group containing 6 to 12 carbon atoms, R 2 is hydrogen or lower alkyl and R 3 is selected from the group consisting of H, --CH 2 , --CH 2 OH, --CHO, ##STR5## wherein X is halogen, ##STR6##
Claim 9
Dependent Claim
24 words
A chemically-modified asphalt composition as defined in claim 1 wherein the reaction is carried out in the presence of a polyfunctional vinyl aromatic monomer.
Claim 10
Dependent Claim
62 words
A chemically-modified asphalt composition as defined in claim 8 wherein the polyfunctional monomer has the formula: ##STR7## wherein R 4 is a divalent aromatic group containing 6 to 12 carbon atoms, R 5 is H or lower alkyl and R 6 is selected from the group consisting of H, --CH 2 , --CH 2 OH, --CHO, ##STR8## wherein X is halogen, ##STR9##
Claim 11
Dependent Claim
39 words
A chemically-modified asphalt composition as defined in claim 1 wherein the asphalt is reacted with the polymerizable vinyl aromatic monomer and the depolymerized rubber, and the resulting product is blended with the terpene resin while at an elevated temperature.
Claim 12
Dependent Claim
18 words
Glass fibers having a coating thereon, said coating comprising a chemically-modified asphalt composition as defined in claim 1.
Claim 13
Dependent Claim
27 words
Glass fibers as defined in claim 11 wherein the glass fibers are in the form of a bundle and the coating constitutes an impregnant in the bundle.
Claim 14
Dependent Claim
38 words
In a glass fiber reinforced asphalt wherein an asphalt constitutes a continuous phase in which the glass fibers are distributed as reinforcement, the improvement comprising, as the continuous phase, a chemically-modified asphalt composition as defined in claim 1.
Claim 15
Dependent Claim
48 words
In a glass fiber reinforced asphalt wherein an asphalt constitutes a continuous phase in which glass fibers, having a coating thereon, are distributed through the continuous phase as reinforcement, the improvement comprising glass fibers which have been coated with a chemically-modified asphalt composition as defined in claim 1.
Claim 16
Dependent Claim
57 words
A glass fiber asphalt composite comprising a bundle of glass fibers, said bundle of glass fibers having been impregnated with a non-tacky rubber-modified asphalt, and an adhesive coating on one surface of the impregnated bundle, said adhesive coating comprising an asphalt which has been reacted with (1) a polymerizable vinyl aromatic monomer and (2) a depolymerized rubber.
Claim 17
Dependent Claim
57 words
A glass fiber asphalt composite comprising a bundle of glass fibers, said bundle of glass fibers having been impregnated with a non-tacky rubber-modified asphalt, and an adhesive coating on one surface of the impregnated bundle, said adhesive coating comprising an asphalt which has been reacted with (1) a polymerizable vinyl aromatic monomer and (2) a depolymerized rubber.
Claim 18
Dependent Claim
14 words
A composite as defined in claim 15 wherein the vinyl aromatic monomer is styrene.
Claim 19
Dependent Claim
15 words
A composite as defined in claim 15 wherein the adhesive coating includes a terpene resin.
Claim 20
Dependent Claim
23 words
A composite as defined in claim 15 wherein the depolymerized rubber has a weight average molecular weight between about 30,000 to about 80,000.
Claim 21
Dependent Claim
17 words
A composite as defined in claim 15 which includes a removable protective strip overlying said adhesive coating.
Claim 22
Dependent Claim
60 words
A flexible laminate comprising a membrane of a coated fibrous reinforcement material having an adhesive layer on one side thereof, said coating being a substantially non-tacky reaction product of asphalt, a non-depolymerized rubber and a polymerizable vinyl aromatic monomer, and said adhesive being the reaction product of a mixture comprising asphalt, a polymerizable vinyl aromatic monomer and a depolymerized rubber.
Claim 23
Dependent Claim
60 words
A flexible laminate comprising a membrane of a coated fibrous reinforcement material having an adhesive layer on one side thereof, said coating being a substantially non-tacky reaction product of asphalt, a non-depolymerized rubber and a polymerizable vinyl aromatic monomer, and said adhesive being the reaction product of a mixture comprising asphalt, a polymerizable vinyl aromatic monomer and a depolymerized rubber.
Claim 24
Dependent Claim
21 words
The laminate of claim 20 wherein said adhesive is the reaction product of a mixture which further includes a non-depolymerized rubber.
Claim 25
Dependent Claim
21 words
The laminate of claim 21 wherein said adhesive is the reaction product of a mixture which further includes a terpene resin.
Claim 26
Dependent Claim
35 words
The laminate of claim 20 or 21 wherein said adhesive further includes a terpene resin, said resin being blended with said adhesive reaction product while at a temperature between about 300° F. to 500° F.
Claim 27
Dependent Claim
29 words
The laminate of claim 20 wherein said depolymerized rubber is depolymerized natural rubber or a depolymerized synthetic conjugated diene polymer and said non-depolymerized rubber is a styrene butadiene polymer.
Claim 28
Dependent Claim
20 words
The laminate of claims 20, 21, 22 or 24 and further including a releasable skin attached to said adhesive layer.
Claim 29
Dependent Claim
13 words
The laminate of claim 20 wherein said reinforcement material is a fibrous mat.
Claim 30
Dependent Claim
13 words
The laminate of claim 26 wherein said mat is a woven glass roving.
Claim 31
Dependent Claim
30 words
A chemically-modified asphalt composition comprising asphalt which has been reacted with (1) a polymerizable vinyl aromatic monomer, (2) a depolymerized rubber, (3) a non-depolymerized rubber and (4) a terpene resin.
Claim 32
Dependent Claim
30 words
A chemically-modified asphalt composition comprising asphalt which has been reacted with (1) a polymerizable vinyl aromatic monomer, (2) a depolymerized rubber, (3) a non-depolymerized rubber and (4) a terpene resin.
Claim 33
Dependent Claim
16 words
A chemically-modified asphalt composition as defined in claim 28 wherein the vinyl aromatic monomer is styrene.
Claim 34
Dependent Claim
33 words
A chemically-modified asphalt composition as defined in claim 28 wherein the depolymerized rubber is depolymerized natural rubber or a depolymerized synthetic conjugated diene rubber and said non-depolymerized rubber is a styrene butadiene copolymer.
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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) | 1987-04-03 | 1987-10-03 | 1988-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-03 | 1991-10-03 | 1992-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-03 | 1995-10-03 | 1996-04-03 | $7700.00 | Window Closed / Lapsed |