摘要:
Acetals are prepared by reacting monohydric primary or secondary alcohols with acrolein-isocyanuric acid adducts. The acetals are polymerizing and cross-linking agents in preparing polymer compositions of the acetals and polyfunctional compounds containing acetal-reactive groups such as alcohols, thiols, oxiranes and amides. Such polymer compositions are useful in molding, laminating, and adhesive applications.
摘要:
3-Oxopropyl isocyanurate compositions are prepared by addition of acrolein to isocyanuric acid. Reaction of the 3-oxopropyl isocyanurate compositions with alcohols yields hemiacetals and acetals. The compositions and their hemiacetals and acetals are useful polymerizing or cross-linking agents for polyfunctional compounds containing aldehyde-reactive groups.
摘要:
A heat-sensitive, three-dimensional thermoplastic layer is laminated to a thermoplastic substrate by a specific fusion bonding process which produces a laminate having substantially no thermal distortion. This process employs cooling to protect the three-dimensional structure from thermal damage and balancing of the heat flow from the substrate to prevent warpage. In the preferred process a grass-like sheet of low density polyethylene is fusion bonded to a rigid high density polyethylene substrate.
摘要:
A process comprising winding polyvinylbutyral interlayer sheet (1) at a controlled low tension reduces blocking at the core of the roll (5) arid minimizes stretch variations within the roll and storing the roll until use at a temperature below 15°C.
摘要:
A stabilized polyarylene ester of an aromatic dicarboxylic acid comprising a synergistically effective amount of an aromatic isocyanate and an aliphatic phosphite.
摘要:
Hot melt adhesive compositions comprising a block copolymer, aluminum powder and glass fiber. The block copolymer is selected from the group consisting of copolyesters, copolyamides, copoly(esteramides) and copoly(ether- esters) melting at a temperature above about 150°C. and having from about 30 to about 70 weight percent of hard segments and from about 70 to about 30 weight percent of soft segments. The weight ratio of block copolymer to aluminum powder and glass fiber is in the range of about 3:7 to about 3:2, the weight ratio of block copolymer to glass fiber is at least about 2:1, and the weight ratio of glass fiber to aluminum powder is at least about 1:9. The compositions are particularly useful for filling voids and cavities in substrates.
摘要:
This invention relates to an improved process for preparing ABS resins wherein an alkadiene rubber is grafted in aqueous emulsion with styrene and nitrile type monomers, forming a grafted rubber, extracting said grafted rubber into a monomer phase and separating said monomer-grafted rubber phase from said aqueous phase followed by mass polymerizing said grafted rubber-monomer phase to form an ABS polyblend, wherein the improvement comprises, carrying out the mass polymerization of said monomers in the presence of sufficient carbon dioxide to provide an ABS resin having a substantially white color.
摘要:
A process is described that results in the production of a hydrophilic air-drying polymer system suitable for increasing the inter-fiber bonding in a fibrous substrate material. The process comprises passing air through a monomer maintained at a temperature below about 30°C., said monomer having at least two activated unsaturations, until a desired viscosity increase has been achieved.
摘要:
Laminates of a polyvinyl butyral sheet with a sheet comprising a copolymer of a vinylaromatic monomer with an unsaturated dicarboxylic acid anhydride have high strength and can be made optically clear. The laminates can be in part foamed to provide insulation materials or metalplated to provide tough materials that could be used for example in automotive applications.