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| Traffic marking paint |
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| Polyolefin-based resin composition |
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| Latex paint formulations and methods |
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Thermoplastic elastomeric blend of monoolefin copolymer rubber, amorphous polypropylene resin and crystalline polyolefin resin
| Details |
Inventors: Rinehart, Robert E.;
Assignee: Uniroyal, Inc. (New York, NY)
Primary Examiner: Seccuro; Carman J.
Assistant Examiner:
Attorney, Agent or Firm: Long; James J.
Thermoplastic elastomeric blend of: (A) EPM or EPDM type rubber; (B) amorphous polypropylene homopolymer or copolymer resin; and (C) crystalline polyolefin resin, characterized by improved processability and physical properties. |
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DETAILED DESCRIPTION I claim: 1.
A thermoplastic elastomer which is a blend of: A.
a monoolefin copolymer rubber which is a copolymer of ethylene and an alpha-monoolefin of the formula CH.
sub.
2 .
dbd.
CHR where R is an alkyl radical having 1 to 12 carbon atoms, and a copolymerizable non-conjugated diene termonomer, said rubber having a Brookfield viscosity in excess of 5,000,000 cps at 375.
degree.
F.
; B.
an amorphous non-elastomeric polypropylene resin having a number average molecular weight of from 500 to 35,000 or amorphous non-elastomeric resinous copolymer of propylene with another monoolefin having a Brookfield viscosity less than 500,000 cps at 375.
degree.
F.
, said amorphous non-elastomeric resin being soluble below 100.
degree.
C.
in aliphatic, aromatic and halogenated hydrocarbon solvents; and C.
a crystalline polyolefin plastic insoluble in the aforesaid solvents below 100.
degree.
C.
; the said ingredients A, B and C being present in the following proportions, expressed as percent by weight based on the sum of the weights of A, B and C: from 15 to 80% of A, from 5 to 45% of B, and from 15 to 80% of C, the said thermoplastic elastomer being in a dynamically partially cured state.
2.
A thermoplastic elastomer as in claim 1 in which the proportions of A, B and C are: from 20 to 80% of A from 5 to 35% of B, and from 15 to 75% of C.
3.
A thermoplastic elastomer as in claim 1 containing up to 70% by weight of oil, based on the sum of the weights of A, B and C.
4.
A thermoplastic elastomer as in claim 1 in which C is crystalline polypropylene resin having a density of from 0.
900 to 0.
910 g/cc.
5.
A thermoplastic elastomer which is a blend of: A.
a rubbery copolymer of ethylene and propylene or terpolymer of ethylene, propylene and a non-conjugated diene, having a Brookfield viscosity in excess of 5,000,000 cps at 375.
degree.
F.
and a Mooney viscosity of at least 20 ML-4 at 212.
degree.
F.
; B.
an amorphous non-elastomeric propylene homopolymer resin having a density of from 0.
82 to 0.
88 g/cc and a number average molecular weight of from 1,000 to 10,000 or amorphous non-elastomeric propylene-ethylene copolymer resin having a Brookfield viscosity less than 500,000 cps at 375
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Adhesives and Rubbers 
