摘要:
This invention relates to a method of sealing the porous surfaces that can be generated during the manufacturing and processing of molded plastic parts. Liquid thermoset coatings are applied to preheated parts and cured to create a barrier on the surface to gasses generated during heat curing of subsequently applied surface coatings. The liquid coating may be comprised of polyurethane forming components; those components in combination with unsaturated polyester resins; vinyl ester resin compositions; coatings derived from hydroxyl or carboxyl containing oligomers reacted with alkylated urea-formaldehyde, melamine-formaldehyde, and/or benzoquanamine-formaldehyde resins; and oligomers containing carboxyls reacted with triglycidyl isocyanurate.
摘要:
Coating compositions are disclosed which use a polyoxetane polymer having CH.sub.2 --O---CH.sub.2 --R.sub.f side chains where R.sub.f is a highly fluorinated alkyl or polyether. The coating compositions use polyisocyanates to create isocyanate terminated polymers from the poly(oxetanes) and from various polyols from alkylene oxides or polyester polyols. These can be reacted together to form block copolymer structures or can be linked together when the coating is crosslinked. A preferred method is to use blocked isocyanate groups. Another preferred embodiment is to use the composition as a abrasion resistant coating for glass run channels.
摘要:
A primerless, one-part, heat curable, low volatile organic compound, polyurethane composition comprises a blocked polyurethane prepolymer made from a liquid hydroxyl terminated intermediate and an excess of a polyisocyanate, a curing agent, silicone and/or low friction polymer and optional fillers. Upon cure of the polyurethane composition, the silicone oil and/or low friction polymer generally imparts low friction and high abrasive resistant properties. A desired use is as a glass run channel coating.
摘要:
A primerless, one-part, heat curable, low volatile organic compound, polyurethane composition comprises a blocked polyurethane prepolymer made from a liquid hydroxyl terminated intermediate and an excess of a polyisocyanate, a curing agent, silicone and/or low friction polymer and optional fillers. Upon cure of the polyurethane composition, the silicone oil and/or low friction polymer generally imparts low friction and high abrasive resistant properties. A desired use is as a glass run channel coating.
摘要:
A liquid thermoset coating is described for application on and near surfaces of molded plastic parts where the resin rich phase has been disturbed or imperfectly formed. The coating has been found to be effective at minimizing paint pops and craters in subsequent finish coatings on said parts. Said paint pops and craters develop during heated cure cycles for the finish coatings. The coating which is applied to the heated part and subsequently cured is preferably an epoxy composition of low viscosity. The molded plastic parts are preferably fiber reinforced thermoset polyester parts with an in-mold coating to improve surface quality.
摘要:
A paper coating formulation and a process for making a paper coating formulation having an improved strength and blister resistance including an aqueous medium having dispersed therein a functionally effective amount of a finely divided mineral filler and a latex binder containing copolymerized acid functional and amine functional monomers in each polymer molecule.
摘要:
A paper coating formulation and a process for making a paper coating formulation having an improved strength and blister resistance including an aqueous medium having dispersed therein a functionally effective amount of a finely divided mineral filler and a latex binder containing copolymerized acid functional and amine functional monomers in each polymer molecule.
摘要:
A liquid thermoset coating is described for application on and near surfaces of molded plastic parts where the resin rich phase has been disturbed or imperfectly formed. The coating has been found to be effective at minimizing paint pops and craters in subsequent finish coatings on said parts. Said paint pops and craters develop during heated cure cycles for the finish coatings. The coating which is applied to the heated part and subsequently cured is preferably an epoxy composition of low viscosity. The molded plastic parts are preferably fiber reinforced thermoset polyester parts with an in-mold coating to improve surface quality.
摘要:
A block copolymer comprising a first polyether block including a pendant alkoxyfluoroalkyl group, and a second polyether block that is substantially devoid of pendant alkoxyfluoroalkyl groups and includes at least two distinct units.
摘要:
A surfactant comprising a polyether segment including at least one pendant alkoxyfluoroalkyl group, and a cationic substituent defined by one of the formulae: or the substituted derivatives thereof.