EP0060673A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Extrudable film-forming compositions of Ziegler-Natta catalyzed olefin polymers including anti-gel and anti-block components
Assignee: Union Carbide Corp
•
Filing: 1982-03-09
•
Granted: —
•
Expires: 2002-03-09
Abstract
Abstract A non-volatile, anti-gel compound having a chain of at least about 5 repeat units of an alkylene oxide and which is soluble in olefin polymers, and an inorganic anti-block agent having a substantially neutral pH are added to a film grade Ziegler-Natta catalyzed olefin polymer composition to prevent: (1) gel streaking/pinstriping during film extrusion processes; (2) blocking of the extruded film; and (3) discoloration of the extruded film upon aging. The anti-gel compound has a molecular weight between about 200 and about 4,000,000 Daltons. A masterbatch concentrate and extrusion method are also disclosed.
Inventors
- 👤 Michael Allen Corwin
- 👤 George Norris Foster
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 12:15
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08F; C08F4/00; C08F4/02; B; B29; B29C; B29C48/00; B29C48/25; B29C48/78; B29C48/793; B29C48/80; B29C48/83; B29C48/832; B29C48/86; B29C48/865; C08K; C08K3/00; C08K3/01; C08K3/013
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
171 words
An extrudable film-forming composition which when extruded forms a film which is essentially devoid of gel streaking and pinstriping and which does not discolor upon aging at 60 0 C for 4 weeks, the film-forming composition being comprised of a Ziegler-Natta catalyzed olefin polymer containing a chloride catalyst residue in a concentration between 5 and 500 ppm, at least one hindered phenolic anti-oxidant, at least one inorganic anti-block compound and at least one anti-gel compound, the hindered phenolic anti-oxidant being present in a concentration between 20 and 5000 ppm, the inorganic anti-block compound being present in a concentration between 500 ppm and 5% by weight and having a substantially neutral pH, the anti-gel compound characterized by having at least about 5 repeat units of an.alkylene oxide and being present in a concentration sufficient to neutralize the chloride catalyst residue, the concentration of the anti-gel compound being at least about 0.8 times the concentration of the hindered phenolic anti-oxidant, and the anti-gel compound having a molecular weight between 200 and 4,000,000 Daltons.
Claim 2
Dependent Claim
171 words
An extrudable film-forming composition which when extruded forms a film which is essentially devoid of gel streaking and pinstriping and which does not discolor upon aging at 60 0 C for 4 weeks, the film-forming composition being comprised of a Ziegler-Natta catalyzed olefin polymer containing a chloride catalyst residue in a concentration between 5 and 500 ppm, at least one hindered phenolic anti-oxidant, at least one inorganic anti-block compound and at least one anti-gel compound, the hindered phenolic anti-oxidant being present in a concentration between 20 and 5000 ppm, the inorganic anti-block compound being present in a concentration between 500 ppm and 5% by weight and having a substantially neutral pH, the anti-gel compound characterized by having at least about 5 repeat units of an.alkylene oxide and being present in a concentration sufficient to neutralize the chloride catalyst residue, the concentration of the anti-gel compound being at least about 0.8 times the concentration of the hindered phenolic anti-oxidant, and the anti-gel compound having a molecular weight between 200 and 4,000,000 Daltons.
Claim 3
Dependent Claim
107 words
A composition as claimed in claim 1 wherein the anti-gel compound is represented by the following structural formula: R-(A-R 1 ) n , wherein n is 1 or 2; R is a hydroxy group; a C 1 -C 24 alkyl alcohol; a C 1 -C 12 alkylated phenol; a C12-C24 alkyl or alkylene amine; or a C 12 -C 24 alkyl or alkylene amide; R 1 is a hydrogen atom or lower alkyl; A is wherein R 2 is ethylene, propylene or mixtures thereof; x is a number between 5 and 20,000; y is a number between 2 and 6; and R 1 is as defined herein.
Claim 4
Dependent Claim
37 words
A composition as claimed in claim 2 wherein the anti-gel compound comprises: a polyalkylene glycol having a molecular weight between 200 and 20,000 Daltons or a polyalkylene oxide having a molecular weight between 20,000 and 4,000,000 Daltons.
Claim 5
Dependent Claim
33 words
A composition as claimed in claim 2 wherein the anti-gel compound comprises: the reaction product of either an alkanol or an alkyl phenol with more than about 5 moles of an alkylene oxide.
Claim 6
Dependent Claim
14 words
A composition as claimed in claim 3 wherein the polyalkylene glycol is polyethylene glycol.
Claim 7
Dependent Claim
20 words
A composition as claimed in claim 2 wherein the polyalkylene oxide is polyethylene oxide, polypropylene oxide or an interpolymer thereof.
Claim 8
Dependent Claim
42 words
A composition as claimed in claim 4 wherein the anti-gel compound is an ethylene or propylene oxide adduct of a lauryl alcohol, mystearyl alcohol, behenyl alcohol, oleyl alcohol or erucyl alcohol, or an adduct of mixtures of the oxides and the alcohols.
Claim 9
Dependent Claim
41 words
A composition as claimed in claim 4 wherein the alkyl phenol is methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl, octyl, nonyl, decyl, undecyl, or dodecyl phenol or mixtures thereof, and the alkylene oxide is ethylene oxide, propylene oxide or mixtures thereof.
Claim 10
Dependent Claim
46 words
A composition as claimed in claim 2 wherein the anti-gel compound comprises the reaction product of either (a) a C 12 -C 24 alkyl or alkylene amine or amide or (b) a polyol or monoalkyl-substituted polyol with more than about 5 moles of an alkylene oxide.
Claim 11
Dependent Claim
37 words
A composition as claimed in claim 9 wherein the alkyl amine or amide is lauryl, mystearyl, palmytyl, stearly, arachidyl or behenyl amine or amide, respectively, and the alkylene oxide is ethylene oxide, propylene oxide or mixtures thereof.
Claim 12
Dependent Claim
36 words
A composition as claimed in claim 9 wherein the alkylene amine or amide is oleyl or erucyl amine or amide, respectively, or mixtures thereof, and the alkylene oxide is ethylene oxide, propylene oxide or mixtures thereof.
Claim 13
Dependent Claim
27 words
A composition as claimed in claim 9 wherein the polyol is glycerol, mannitol or sorbitol and the alkylene oxide is ethylene oxide, propylene oxide or mixtures thereof.
Claim 14
Dependent Claim
56 words
A composition as claimed in any one of the preceding claims wherein the inorganic anti-block compound comprises finely divided diatomaceous earth fluxed with sodium phosphate; finely divided diatomaceous earth fluxed with sodium carbonate which has been neutralized with an acid wash; finely divided calcium carbonate; synthesized or naturally occurring amorphous finely divided silica; or a talc.
Claim 15
Dependent Claim
23 words
A composition as claimed in any one of the preceding claims wherein the pH of the anti-block compound is between 6 and 8.
Claim 16
Dependent Claim
29 words
A composition as claimed in any one of the preceding claims wherein the anti-gel compound is characterized by having at least about 10 repeat units of an alkylene oxide.
Claim 17
Dependent Claim
44 words
A composition as claimed in any one of the preceding claims wherein the olefin polymer is an ethylene polymer, the chloride catalyst residue concentration is between 5 and 50 ppm, and the concentration of the anti- gel compound is between 25 and 10,000 ppm.
Claim 18
Dependent Claim
59 words
A composition as claimed in any one of Claims 1 to 15 wherein the olefin polymer is a propylene polymer or a butene polymer, the chloride catalyst residue concentration is between 10 and 500 ppm, the hindered phenolic anti-oxidant concentration is between 200 and 5000 ppm, and the concentration of the anti-gel compound is between 200 and 10,000 ppm.
Claim 19
Dependent Claim
31 words
A composition as claimed in any one of the preceding claims wherein the anti-gel compound is present in an amount at least 5 times the amount of chloride catalyst residue present.
Claim 20
Dependent Claim
22 words
A composition as claimed in Claim 18 wherein the anti-gel compound to chloride catalyst residue ratio is greater than 10 to 1.
Claim 21
Dependent Claim
32 words
A composition as claimed in any one of the preceding claims wherein the olefin polymer is an ethylene/ propylene copolymer, ethylene/butene-1 copolymer, ethylene/pentene-1 copolymer, ethylene/4-methyl-pentene-1 copolymer, ethylene/hexene-1 copolymer, or ethylene/ octene-1 copolymer.
Claim 22
Dependent Claim
36 words
A composition as claimed in any one of the p receding claims wherein the olefin polymer is an ethylene interpolymer which includes two or more of the following monomers: propylene, butene-1, pentene-1, hexene-1, 4-methylpentene-l and octene-1.
Claim 23
Dependent Claim
35 words
A composition as claimed in any one of the preceding claims wherein the olefin polymer is a propylene interpolymer which includes two or more of the following monomers: ethylene, butene-1, pentene-1, hexene-1, 4-methyl-pentene-1 and octene-1.
Claim 24
Dependent Claim
35 words
A composition as claimed in any one of the preceding claims wherein the olefin polymer is a butene-1 interpolymer which includes two or more of the following monomers: ethylene, propylene, pentene-1, hexene-1, 4-methyl-pentene-1 and octene-1.
Claim 25
Dependent Claim
17 words
A composition as claimed in any one of the preceding claims further including an organic slip agent.
Claim 26
Dependent Claim
16 words
A composition as claimed in Claim 24 wherein the organic slip agent is erucamide or oleamide.
Claim 27
Dependent Claim
149 words
A masterbatch concentrate which, when admixed with a Ziegler-Natta catalyzed olefin polymer in a letdown ratio of between 5 and 100 to 1 by weight of the catalyzed olefin polymer to the masterbatch concentrate, provides a film-forming composition capable of being extruded into a film which is essentially free from gel streaking and pinstriping and which does not discolor upon aging at 60 0 C for 4 weeks, wherein the masterbatch concentrate comprises: between 40% and 98% by weight of an olefin polymer compatible with the Ziegler-Natta catalyzed olefin polymer; between 0.1% and 5% by weight of a hindered phenolic anti-oxidant; between 0.1% and 5% by weight of an anti-gel compound having at least about 5 repeat units of.an alkylene oxide and also having a molecular weight between 200 and 4,000,000 Daltons; and between 2% and 48% by weight of an inorganic anti-block compound having a substantially neutral pH.
Claim 28
Dependent Claim
149 words
A masterbatch concentrate which, when admixed with a Ziegler-Natta catalyzed olefin polymer in a letdown ratio of between 5 and 100 to 1 by weight of the catalyzed olefin polymer to the masterbatch concentrate, provides a film-forming composition capable of being extruded into a film which is essentially free from gel streaking and pinstriping and which does not discolor upon aging at 60 0 C for 4 weeks, wherein the masterbatch concentrate comprises: between 40% and 98% by weight of an olefin polymer compatible with the Ziegler-Natta catalyzed olefin polymer; between 0.1% and 5% by weight of a hindered phenolic anti-oxidant; between 0.1% and 5% by weight of an anti-gel compound having at least about 5 repeat units of.an alkylene oxide and also having a molecular weight between 200 and 4,000,000 Daltons; and between 2% and 48% by weight of an inorganic anti-block compound having a substantially neutral pH.
Claim 29
Dependent Claim
36 words
A concentrate as claimed in Claim 26 wherein the concentration of the olefin polymer is between 60% and 95% by weight and the concentration of the inorganic anti-block compound is between 4% and 20% by weight.
Claim 30
Dependent Claim
22 words
A concentrate as claimed in Claim 26 or Claim 27 when characterised by any of the features of Claims 1 to 25.
Claim 31
Dependent Claim
55 words
A process for extruding a film-forming olefin polymer based composition into film which is essentially free from gel streaking and pinstriping and which does not discolor upon aging at 60 0 C for 4 weeks, characterised in that the composition comprises an extrudable film-forming composition as claimed in any one of Claims 1 to 25.
Claim 32
Dependent Claim
40 words
A process as claimed in Claim 29 characterised in that the extrusion temperature is at least 135°C to 345°C and that the throughput time for the olefin polymer based composition in the extruding equipment is from 0.2 to 10 minutes.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.