Michigan Molecular Institute

Dale J Meier

Jin Hu

Petar Radivoj Dvornic

Robert M Nowak

Paul L Parham

Claire Hartmann-Thompson

Quiyun Xu

Rakesh Sachdeva

Leszek Jarecki

The HBP Free-POSS compounds of Formula I are superior to prior HB polymers and linear polymers in space and electronic applications because they have better resistance to electrons, protons and atomic oxygen, have superior out-gassing performance, and are transparent. They are used as coatings, films, adhesives, sealants and elastomers.

Hyperbranched polymers containing polyhedral oligosilsequioxane branching units

The present invention relates to hyperbranched copolymer networks containing hyperbranched copolymers that have perfluorocarbon and organosilicon entities that have high hydrophobicity, or high oleophobicity, or high thermal stability, or good adhesion to substrates, or any combinations thereof. This invention provides a further desirable combination of properties that include solubility before crosslinking, chemical resistance, and easy processibility. The copolymers may be crosslinked with a variety of crosslinking agents to give either rigid or elastomeric networks.

Networks containing perfluorocarbon organosilicon hyperbranched polymers

Hyperbranched polymers having a plurality of at least two different types of functional groups are described. Specific embodiments include hyperbranched polymers having functional groups of a first type that are substantially uniformly distributed throughout the hyperbranched polymer molecule and a second type of functional group that is substantially uniformly distributed at the terminals of the hyperbranched polymer molecule. The hyperbranched polymers having different types of functional groups are synthesized by reacting one or more monomers having functional groups that are capable of reacting during a set of polymerization conditions to form a hyperbranched polymer, wherein at least one of the monomers contains latent functional groups that are not reactive during polymerization.

Cross-linked networks containing nanoscopic reinforcing domains

Cross-linked networks from multifunctional hyperbranched polymers

Hyperbranched polymers are prepared by a process in which a monomer having the form A is reacted with another monomer of the form B , where A and B are functional groups that do not react with themselves, but do react with each other. The process allows synthesis of hyperbranched polymers having a single type of terminal functional group from comonomers, each of which has a single type of functional group. The invention allows greater flexibility in the preparation of a larger variety of different hyperbranched polymers and enables hyperbranched polymers to be prepared at a lower cost as compared with conventional processes using monomers having two types of functional groups that react during polymerization.

Hyperbranched polymers by multimonomer polymerization

Hyperbranched polymers with latent functionality and methods of making same

Hyperbranched polyureas, polyurethanes, polyamidoamines, polyamides and polyesters

Hyperbranched polycarbosilanes, polycarbosiloxanes, polycarbosilazenes and copolymers thereof are prepared by reacting a difunctional or polyfunctional monomer having functional groups of one type (A) without any other functional groups capable of reacting significantly during polymerization, and a difunctional or polyfunctional monomer having functional groups of another type (B) without any other functional groups capable of reacting significantly during polymerization, wherein each A-functional group is reacted with a B-functional group, and wherein at least one of the monomers has a functionality of at least three. The process enables hyperbranched polycarbosilanes, polycarbosiloxanes, polycarbosilazenes and copolymers thereof to be prepared at a lower cost than with conventional synthesis processes, and provides greater flexibility in the preparation of a larger variety of different types of hyperbranched polycarbosilanes, polycarbosiloxanes, polycarbosilazenes and copolymers thereof.

Hyperbranched polycarbosilanes, polycarbosiloxanes, polycarbosilazenes and copolymers thereof

A solid crystalline organic polymer is made into a filament, rod, or film by ultra-drawing it at a temperature within 70.degree. C. of but below its melting point at the operating pressure while subjecting the polymer during and immediately after drawing to a hydrostatic pressure of at least about 500 atmospheres applied by a fluid medium inert to the polymer. High-density polyethylene and isotactic propylene are preferred polymers. A draw ratio of at least 20:1, and as high as 60:1, may be used. Pressure may be up to 2500 atmospheres or more. The rate of drawing for polyethylene is above 500 percent per minute. The ultra-drawn products are transparent, essentially free of internal voids, and exhibit very high tensile moduli of elasticity, up to 65 to 70 Giga-Pascals in the case of polyethylene.

Growing community of inventors

Midland, MI, United States of America

Dale J Meier