Ethyl Corporation

Albemarle Corporation

F Alexander Pettigrew

Susan D Landry

Jon S Reed

Harold R Penton

Hsueh M Li

James E Torres

Genevieve S Lum

Janet F Jones

David K Doucet

William Jay Colucci

Lawrence J Cunningham

Michael E Kucsma

New, highly effective detergent/dispersants for use in spark ignition fuels are described. They are Mannich condensation products formed from (i) one mole part of hydroxyaromatic compound having on the ring an aliphatic hydrocarbyl substituent derived from a polyolefin having a number average molecular weight in the range of about 500 to about 3000, (ii) from 0.8 to 1.5 mole part(s) of aliphatic polyamine having one and only one primary or secondary amino group in the molecule capable of participating in the Mannich condensation reaction, and (iii) from 0.8 to 1.3 mole part(s) of aldehyde, provided that the mole ratio of aldehyde to amine is 1.2 or less. Carrier fluids such as poly(oxyalkylene) compounds further enhance the effectiveness of these Mannich condensation products in minimizing or reducing intake valve deposits and/or intake valve sticking.

Additives for minimizing intake valve deposits, and their use

The impact strength of articles made from a flame-retarded formulated HIPS resin containing an impact modifier is increased by forming a concentrate or masterbatch containing the flame retardant and impact modifier, blending the concentrate with HIPS resin, and extruding the resultant blend.

Flame-retarded hips formulations with enhanced impact strength

The impact strength of articles made from a flame-retarded formulated ABS resin containing an impact modifier is increased by forming a concentrate or masterbatch containing the flame retardant and impact modifier, blending the concentrate with ABS resin and extruding the resultant blend.

Flame-retarded abs formulations with high impact strength

This invention relates to a method for increasing the ultraviolet light stability of articles made from macromolecular materials comprising: forming a flame-retarded formulation containing macromolecular material and a mixture of (i) a first alkylenebis(tetrabromophthalimide) flame retardant having a yellowness index (YI) value ranging from about 20 to about 40 as determined by ASTM D-1925; and (ii) a second alkylenebis-(tetrabromophthalimide) flame retardant having a yellowness index (YI) value (ASTM D-1925) ranging from about 2 to about 15 whereby the uv stability of a test plaque made from the flame-retarded formulation is greater than the arithmetic average of the uv stabilities of a test plaque made from a flame-retarded formulation containing (i) but not (ii) and of a test plaque made from a flame-retarded formulation containing (ii) but not (i).

UV stable compositions

The impact strength of a flame retarded formulated ABS resin containing an impact modifier is increased by masterbatching the flame retardant and impact modifier.

Flame-retarded ABS formulations with high impact strength

Organophosphazene polymers having acyloxysilyl or alkoxysilyl substituents are curable at room temperature when exposed to atmosphere containing moisture.

Polyorganophosphazene curable in atmosphere

Low molecular weight organophosphazene oligomers, especially cyclic oligomers, can be cross-linked by siloxane bridges to form solid high molecular weight polymers.

Cross-linked phosphazene polymer

Polyphosphazene elastomers for use in making low density foam comprising a --P&lt;.dbd.N].sub.n substantially linear backbone randomly substituted with 20-80 mole percent phenoxy, 20-80 mole percent lower alkylphenoxy, 1-50 mole percent alkoxy and 0.5-20 mole percent alkenylphenoxy and the foamed products made therefrom.

Aryloxy-alkoxy-allylphenoxy substituted polyphosphazenes

A prosthesis for subcutaneous implantation such as a mammary implant used in reconstructive surgery is made from a polyphosphazene elastomer (e.g. polyfluoroalkoxy phosphazene) sac containing a silicone gel. The sac is essentially impermeable to the silicone gel fill and overcomes a gel migration problem encountered with implants made using polysiloxane sacs.

Mammary implant

Polyphosphazenes containing 20-80 mole percent phenoxy, 20-80 mole percent alkylphenoxy and 2-30 mole percent alkoxy substituents possess low glass transition temperature while still exhibiting good smoke values in standard tests.

Aryloxy-alkoxy substituted polyphosphazenes

One or a mixture of compounds of the formula:

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Baton Rouge, LA, United States of America

F Alexander Pettigrew