Polyurea resins having excellent mechanical properties and high heat resistance can be prepared by the reaction of an aromatic polyamine component and an aliphatic polyisocyanate component, in which the aromatic polyamine component is a combination of a first aromatic polyamine compound which is typically a polyoxyalkylene-bis(aminobenzoate) compound and a second aromatic polyamine compound selected from various classes of aromatic polyamine compounds different from the first aromatic polyamine compound, in a specified weight proportion. The polyurea resin can be imparted with further improved heat resistance when the aliphatic polyisocyanate component is a combination of an aliphatic diisocyanate compound and a cyclic trimer of an aliphatic polyisocyanate compound in a specified weight proportion.
A novel polyurea composition comprising the reaction product of an organic isocyanate and an organic amine, each having at least two functional groups is disclosed. Golf balls employing covers formed of the polyurea composition also are disclosed.
An active-matrix liquid crystal display device employing the in-plane switching mode in which an electric field substantially parallel to the substrate surface is applied to the liquid crystals, characterized by weak torsional anchoring of the liquid crystal molecules (6) and the alignment layer surface at the liquid crystal/alignment layer interface to an extent that the extrapolation length which expresses the strength of said torsional anchoring will become not less than 10% of the gap between the substrates. For obtaining such weak torsional anchoring, an organic alignment layer (5) comprising a polymer and/or oligomer having long-chain alkylene and/or fluoro groups, or an inorganic alignment layer formed by oblique evaporation technique, or a photo-reactive alignment layer formed by linearly polarized light irradiation is used.
Composition for forming polishing layer of chemical mechanical polishing pad, chemical mechanical polishing pad and chemical mechanical polishing method
申请人:JSR Corporation
公开号:EP2083027A2
公开(公告)日:2009-07-29
Provided is a composition for forming a polishing layer of a chemical mechanical polishing pad having polishing characteristics such as a high polishing rate, an excellent planarity of the polished object and less scratches of the polished object.
The above composition for forming a polishing layer of a chemical mechanical polishing pad comprises (A) a polyurethane having a carbon-carbon double bond on a side chain and (B) a cross-linking agent. The polyurethane (A) is preferably a thermoplastic polyurethane (A') obtained by mixing at least the following components (a11) to (a13) and component (a2) in a proportion satisfying the following conditions (1) and (2) and reacting them:
(a11) an oligomer which has one or more hydroxyl groups and one or more carbon-carbon double bonds and which has a number average molecular weight of 500 to 2500, (a12) an oligomer which has two or more hydroxyl groups and either one or both of an ether bond and an ester bond and which has a number average molecular weight of 500 to 2500 and is different from the component (a11), (a13) a monomer having two hydroxyl groups and (a2) a monomer having two isocyanate groups; and (1) a value of M-1/M-OH is 0.85 to 1.10, and (2) a value of M-2/M-OH is 0.45 to 0.80, wherein M-1 is the number of isocyanate groups contained in the component (a2), M-2 is the number of hydroxyl groups contained in the component (a13) and M-OH is the total number of hydroxyl groups contained in the components (a11), (a12) and (a13).
Multi-layered golf balls containing a dual-core structure are provided. The core structure includes an inner core (center) comprising a foam composition, preferably foamed polyurethane. The outer core layer is preferably formed from a non-foamed composition selected from thermoset compositions and thermoplastic compositions. The core layers have different hardness and specific gravity levels. The specific gravity (density) of the foam inner core is preferably less than the density of the outer core layer.