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Polyphenylene based compounds as processing aids
Februaw 1991
Additives for Polymers
TECHNICAL Additives
review
NOTES
A review of the current technical and commercial developments in the following sectors: antimicrobial agents: antioxidants; antistatic agents; blowing agents; colourants; degradables; fire retardants; heat stabilizers; lubricants; mould release agents; organic peroxides; plasticizers; property modifiers; UV stabilizers; and urethane catalysts. The main developments focus on environmental issues and optimizing performance characteristics. Mod. Plast., 1990, C&p t.), 89- 152
CFC alternative blowing agent for foams - 1
Recticel has developed a CFC-free blowing system and technology for rigid insulation foams with an insulation value very close to that of CFC-blown foams. The low-boiling point liquid which is used to replace CFCs is on the EINECS register, but Recticel decline to say what it is. The new blowing agent is designated L.BL2, and it enables rigid foams with thermal insulation, or lambda, values of 0.025 at 10°C to be produced on suitably modified machinery. Conventional foams have lambda values of about 0.023. Recticel has patented the technology to produce these CFC-free foams.
CFC alternative blowing agent for foams - 2
An additive which can eliminate the need for environmentallyquestionable CFC agents in the manufacture of flexible foams
has been introduced by Shell Chemicals. Trials with Carapor 2001 have shown that its addition carries no cost penalties, nor does it have any detrimental effects on physical properties of the finished foam; in fact, in some cases these properties have been enhanced significantly by the inclusion of Carapor 2001 in the product mix. It has been developed by Shell &search to meet growing demands for CFC replacements in the manufacture of polyurethane foams. Carapor 2001 can be incorporated into the foam in varying proportions, allowing a corresponding reduction in the need for CFC blowing agent to the point of total elimination. It requires no additional dosing equipment on the production line, nor does its use call for any extra precautions in storage or handling.
Polyphenylene based compounds as processing aids
2
A joint evaluation has been conducted by Monsanto and Owens
Corning Fiberglas on a new range of polyphenyl based additives which are expected to fmd widespread future application as processing aids in glass reinforced thermoplastics and polymer blends.
01991 Elsevier Science Publishers Ltd.
Additives for Polvmers
February 1991
The addition of polyphenyl based processing aids to glass reinforced formulations has been developed to improve the melt flow and surface appearance of the finished parts without affecting their ultimate mechanical properties. Polyphenyls can also be used as processing aids and rheology modifiers in tmfilled or mineral filled plastics and polymer blends and find applications in sealants, adhesives and coatings. A range of polyphenyl products offering different levels of volatility and compatibility with polymer matrices will be commercially available both as solids (Santowax R and Q> and as liquids with varying viscosity (HB-40, MXP-2020 and HQ-40). Macplas, 1990,ChTw.), 112
MATERIALS END USE TRADE NAME(S) CHEMICAL TYPE COMPANY
FILLER ACMH-93 Magnesium hydroxide AluChem Inc., 01 Landy Lane, Cincinnati, OH45215
PRODUCT DETAILS
A nat~ally-o~e~~g product now available in sample quantities as a less-expensive substitute for the synthetic or precipitated grades,
END USE TRADE NAME(S) CHEMICAL TYPE COMPANY
HEAT ST~I~ZER MARK 6045 Barium zinc Argus Chemical Div., Witco Corp.
PRODUCT DETAILS
A two-conlponent ~a~i~~ll-f~.ee system for a~~to~notive interior applications that is said to overcome the problems of urethane staining. Applicable for slush and rotational moulding.
END USE TRADE NAME(S) CHEMICAL 1 >PE coMl?ANY
HEAT STABILIZERS 1) 1NTERSTAB LT-4798 2) INTERSTAB LT.4797 1) Mixed metal soap system 2) A liquid barium/zinc system Akzo Chemicals
PRODUCT DETAILS
LT-4798 is for extruded and calendered clear PVC. LT-4797 is said to be particularly useful for clear or fillect vinyl calendering.
01991 Elsevier Science Publishers Ltd.
3
Additives for Polymers
TECHNICAL Additives
review
NOTES
A review of the current technical and commercial developments in the following sectors: antimicrobial agents: antioxidants; antistatic agents; blowing agents; colourants; degradables; fire retardants; heat stabilizers; lubricants; mould release agents; organic peroxides; plasticizers; property modifiers; UV stabilizers; and urethane catalysts. The main developments focus on environmental issues and optimizing performance characteristics. Mod. Plast., 1990, C&p t.), 89- 152
CFC alternative blowing agent for foams - 1
Recticel has developed a CFC-free blowing system and technology for rigid insulation foams with an insulation value very close to that of CFC-blown foams. The low-boiling point liquid which is used to replace CFCs is on the EINECS register, but Recticel decline to say what it is. The new blowing agent is designated L.BL2, and it enables rigid foams with thermal insulation, or lambda, values of 0.025 at 10°C to be produced on suitably modified machinery. Conventional foams have lambda values of about 0.023. Recticel has patented the technology to produce these CFC-free foams.
CFC alternative blowing agent for foams - 2
An additive which can eliminate the need for environmentallyquestionable CFC agents in the manufacture of flexible foams
has been introduced by Shell Chemicals. Trials with Carapor 2001 have shown that its addition carries no cost penalties, nor does it have any detrimental effects on physical properties of the finished foam; in fact, in some cases these properties have been enhanced significantly by the inclusion of Carapor 2001 in the product mix. It has been developed by Shell &search to meet growing demands for CFC replacements in the manufacture of polyurethane foams. Carapor 2001 can be incorporated into the foam in varying proportions, allowing a corresponding reduction in the need for CFC blowing agent to the point of total elimination. It requires no additional dosing equipment on the production line, nor does its use call for any extra precautions in storage or handling.
Polyphenylene based compounds as processing aids
2
A joint evaluation has been conducted by Monsanto and Owens
Corning Fiberglas on a new range of polyphenyl based additives which are expected to fmd widespread future application as processing aids in glass reinforced thermoplastics and polymer blends.
01991 Elsevier Science Publishers Ltd.
Additives for Polvmers
February 1991
The addition of polyphenyl based processing aids to glass reinforced formulations has been developed to improve the melt flow and surface appearance of the finished parts without affecting their ultimate mechanical properties. Polyphenyls can also be used as processing aids and rheology modifiers in tmfilled or mineral filled plastics and polymer blends and find applications in sealants, adhesives and coatings. A range of polyphenyl products offering different levels of volatility and compatibility with polymer matrices will be commercially available both as solids (Santowax R and Q> and as liquids with varying viscosity (HB-40, MXP-2020 and HQ-40). Macplas, 1990,ChTw.), 112
MATERIALS END USE TRADE NAME(S) CHEMICAL TYPE COMPANY
FILLER ACMH-93 Magnesium hydroxide AluChem Inc., 01 Landy Lane, Cincinnati, OH45215
PRODUCT DETAILS
A nat~ally-o~e~~g product now available in sample quantities as a less-expensive substitute for the synthetic or precipitated grades,
END USE TRADE NAME(S) CHEMICAL TYPE COMPANY
HEAT ST~I~ZER MARK 6045 Barium zinc Argus Chemical Div., Witco Corp.
PRODUCT DETAILS
A two-conlponent ~a~i~~ll-f~.ee system for a~~to~notive interior applications that is said to overcome the problems of urethane staining. Applicable for slush and rotational moulding.
END USE TRADE NAME(S) CHEMICAL 1 >PE coMl?ANY
HEAT STABILIZERS 1) 1NTERSTAB LT-4798 2) INTERSTAB LT.4797 1) Mixed metal soap system 2) A liquid barium/zinc system Akzo Chemicals
PRODUCT DETAILS
LT-4798 is for extruded and calendered clear PVC. LT-4797 is said to be particularly useful for clear or fillect vinyl calendering.
01991 Elsevier Science Publishers Ltd.
3