US4386182A
Expired / Lapsed
US
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Thermoplastic elastomeric composition containing vulcanized rubber particles and surfactant and process for preparation thereof
Assignee: VREDESTEIN ICOPRO BLV
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Filing: 1980-07-22
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Granted: 1983-05-31
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Expires: 2000-07-22
Abstract
Abstract Thermoplastic elastomeric compositions are prepared by mixing comminuted vulcanized rubber having a mean particle size of below 1.5 mm with a thermoplastic olefin or diolefin polymer, particular polyethylene, at a weight ratio of from 1:3 to 3:1, and with a non-ionic surfactant in an amount of 0.1 to 5 wt. % referring to the total amount of polymers. The addition of a non-ionic surfactant greatly improves the bonding between the two main components, thus yielding compositions of a very low level of porosity and improved mechanical properties, particularly superior thoughness. The compositions can be moulded or extruded to a variety of products, such as profiles, roofings, fencing posts, pallets, and also shoe sales, saddle covers, solid tires, sprinkling funnels, etc.
Inventors
- 👤 Jan W. H. Zijp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:07
CPC Classifications
C; C08; C08L; C08L9/00; C08L19/00; C08L19/003; C08L23/00; C08L23/02; C08L23/04; C08L23/06; C08L53/00; C08L53/02; C08L2207/00; C08L2207/06; C08L2207/062; C08L23/18; C08L23/20; C08L23/22; C08L7/00; C08L9/06
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
106 words
A non-aqueous thermoplastic elastomeric composition of (i) a comminuted vulcanized rubber having a mean particle size of below 1.5 mm, wherein said rubber is selected from the group consisting of butadiene rubber, isoprene rubber and SBR, (ii) a thermoplastic olefin or diolefin polymer constituted of lower alkene or alkadiene monomers, wherein the weight ratio of rubber to thermoplastic polymer is from 1:3 to 3:1, and (iii) a non-ionic surfactant which is the reaction product of a hydroxyl compound with an alkene oxide, and which is present in an amount of from 0.1 to 5 wt. %, calculated relative to the total quantity of the other components.
Claim 2
Dependent Claim
106 words
A non-aqueous thermoplastic elastomeric composition of (i) a comminuted vulcanized rubber having a mean particle size of below 1.5 mm, wherein said rubber is selected from the group consisting of butadiene rubber, isoprene rubber and SBR, (ii) a thermoplastic olefin or diolefin polymer constituted of lower alkene or alkadiene monomers, wherein the weight ratio of rubber to thermoplastic polymer is from 1:3 to 3:1, and (iii) a non-ionic surfactant which is the reaction product of a hydroxyl compound with an alkene oxide, and which is present in an amount of from 0.1 to 5 wt. %, calculated relative to the total quantity of the other components.
Claim 3
Dependent Claim
32 words
A thermoplastic elastomeric composition according to claim 1, wherein non-ionic surfactant is present in an amount from 0.5 to 2.5 wt. %, calculated relative to the total quantity of the other components.
Claim 4
Dependent Claim
30 words
A thermoplastic elastomeric composition according to either claim 1 or 2, wherein said non-ionic surfactant is the reaction product of a hydroxyl compound with 1-500 units of an alkene oxide.
Claim 5
Dependent Claim
39 words
A thermoplastic elastomeric composition according to either claim 1 or 2, wherein said non-ionic surfactant is the reaction product of a phenol with one or more alkyl groups having 1 to 12 carbon atoms and 1-500 ethylene oxide units.
Claim 6
Dependent Claim
28 words
A thermoplastic elastomeric composition according to either of claim 1 or 2, wherein the weight ratio of rubber and thermoplastic polymer is from about 1:2 to about 2:1.
Claim 7
Dependent Claim
27 words
A thermoplastic elastomeric composition according to either claim 1 or 2, wherein the weight ratio of rubber to thermoplastic polymer is from about 2:3 to about 3:2.
Claim 8
Dependent Claim
29 words
Thermoplastic elastomeric composition according to either claim 1 or 2, wherein said comminuted vulcanized rubber is obtained by grinding pneumatic tires, with subsequent removal of ferrous constituents and drying.
Claim 9
Dependent Claim
56 words
A thermoplastic elastomeric composition according to either claim 1 or 2, wherein said thermoplastic olefin or diolefin polymer is a polymer of ethylene, propylene, butylene, butadiene, isoprene, or mixtures of these, or a copolymer of ethylene, propylene, butylene, including hydrogenated butadiene or isoprene with less than 50 wt. % of one or more other olefin monomer.
Claim 10
Dependent Claim
17 words
A thermoplastic elastomeric composition according to either claim 1 or 2, wherein said thermoplastic polymer is polyethylene.
Claim 11
Dependent Claim
139 words
A process for the manufacture of a thermoplastic elastomeric composition which consists essentially in comminuting vulcanized rubber, wherein said rubber is selected from the group consisting of butadiene rubber, isoprene rubber, and SBR, to a mean particle size of at most about 1.5 mm, and intermixing the same with (a) a thermoplastic olefin or diolefin polymer constituted of lower alkene or alkadiene monomers at a weight ratio of rubber to thermoplastic polymer of from about 1:3 to 3:1, and with a non-ionic surfactant which is the reaction product of a hydroxyl compound with an alkene oxide, added to the mixture in an amount from 0:1 to 5 wt. % calculated relatively to the total quantity of said other components, the mixing together of all three of said components being conducted at a temperature of at most about 250° C.
Claim 12
Dependent Claim
139 words
A process for the manufacture of a thermoplastic elastomeric composition which consists essentially in comminuting vulcanized rubber, wherein said rubber is selected from the group consisting of butadiene rubber, isoprene rubber, and SBR, to a mean particle size of at most about 1.5 mm, and intermixing the same with (a) a thermoplastic olefin or diolefin polymer constituted of lower alkene or alkadiene monomers at a weight ratio of rubber to thermoplastic polymer of from about 1:3 to 3:1, and with a non-ionic surfactant which is the reaction product of a hydroxyl compound with an alkene oxide, added to the mixture in an amount from 0:1 to 5 wt. % calculated relatively to the total quantity of said other components, the mixing together of all three of said components being conducted at a temperature of at most about 250° C.
Claim 13
Dependent Claim
17 words
A process according to claim 10, wherein said mixing is at a temperature of below 200° C.
Claim 14
Dependent Claim
13 words
The composition of claims 1 or 2 substantially free from moisture by drying.
Claim 15
Dependent Claim
17 words
The process of claims 10 or 11 wherein the composition is substantially freed from moisture by drying.
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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) | 1986-05-30 | 1986-11-29 | 1987-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-30 | 1990-11-29 | 1991-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-30 | 1994-11-29 | 1995-05-31 | $7700.00 | Window Closed / Lapsed |