Amine-terminated polyethers

Polybutadienes, polycaprolactones, polycarbonates, and amine-terminated polyethers (ATPEs) are shown in Scheme 4.4 as examples of other commercially available polyols. They are all specialty materials, used in situations where specific property profiles are required. For example, ATPEs are utilized in spray-applied elastomers where fast-reacting, high-molecular-weight polyamines give quick gel times and rapid viscosity buildup. Polycarbonates are used for implantation devices because polyuredtanes based on them perform best in this very demanding environment. Polycaprolactones and polybutadienes may be chosen for applications which require exceptional light stability, hydrolysis resistance, and/or low-temperature flexibility. 

Atomic force morphology (AFM), 490 ATPEs. See Amine-terminated polyethers (ATPEs)... 

Anderson et al. (1) prepared curable dental compositions consisting of the reaction products of amine-terminated polyethers, methacrylate-terminated polyethers, 2-hydroxyethyl(meth)-acrylate, and V-vinyl pyrrolidone. 

If no polyol is used and only amine-terminated polyethers with a diamine chain extender are employed, a polyurea RIM system is obtained. 

Priester et al (141) have found a method of controlling the amine-isocyanate reaction by using substituted-amine-terminated polyethers, and they obtained high-resiliency polyurea foams by this method. Ashida et al (81) prepared low-density flexible polyurea foams by using a primary-amine-terminated polyether (Jefhunine D-2000, Texaco Chemical). 

Usually, methylene diisocyanate (MDI) is used with m-phenyl diamine (m-PDA) with hard (aromatic amine) or- soft (amine terminated polyether with MW of 500-5400 Daltons) chain extenders. With optimized formulations and extruder-mold conditions, cycle times of 3 to over 5 min can be obtained. With the use of internal mold release agents, the cycle time can be reduced to less than 2 min. Typical RIM operations for the production of automotive parts can run down to 1-min cycle time. These products range from the softer bumper covers to stiffer vertical body panels, such as fenders, doors, and quarter panels. 

ATPE atomic amine terminated polyether BING Eederation of European Rigid Polyure-... 

Synonyms Polyether polyol, flexible Polyether polyol, flexible, amine-terminated Polyether polyol, rigid Polyol, flexible Polyol, flexible, amine-terminated Polyol, rigid Polyoxypropyleneamine Polyoxypro-pylene triol... 

Polyamide-polyether block copolymers can be formed by a variety of techniques. One of them consists of initial preparation of amine-terminated polyethers. This can be done by reacting hydroxv-terminated polyethers with acrylonitrile and then reducing the nitrile groups to amines ... 

Polyoxyalkylene amines (polyglycol amines) are another important group of polyamine hardeners. Chemically they are amine terminated polyethers derived from polyethylene glycols or polypropylene glycols. Among their unique features are flexibility, longer pot life and lighter color. 

Reactions of polyamide-12 and amine-terminated polyether (Jeffamine ED-900) with the same coupling agents have been applied by the same authors for the synthesis of... 

In later publications, however, the same authors reported that the reaction of bis(5(4H)oxazolinones) derived from naturally occurring a-amino acids, that is, with at least one hydrogen atom at the 4 position, with amine-terminated polyethers and polyamides in the bulk at 175-200 °C is also possible. Scheme 12 shows the synthesis in which the bisox-azolinones derived from alanine, valine, phenylalanine, and methionine were obtained. 

The complete formulation of the RIM product includes polyol, isocyanate, chain extender, dispersed gas or blowing agent, surfactant to help control the gas cell dispersion in the elastomer, tin catalyst to accelerate the polyurethane formation (not needed with the amine-terminated polyethers), and fillers that may be of the reinforcing type. The most widely used rein-... 

Acevedo M and Pradet A (1993) Study of bulk chain coupling reactions. II. Reaction between bisoxazolones and amine-terminated polyether synthesis of polyether-6focfc-polyamides, J Polym Sci A Polym Chem 31 1579-1588. 

Pradet and co-workers [60] have presented an original preparation of polyether-6-amide copolymers using a chain-coupling reaction between 4,4 -disub-stituted bisoxazolones and a mixture of amine-terminated polyethers and polyamide oligomers (Figure 4). The reaction could be carried out in a one- or... 

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