摘要:
Organopolysiloxanes bearing quaternary ammonium groups and containing units of the general formula —[R2—(SiR2—O)b—SiR2—R2—N+R12]n—·nX− (I′) where R are identical or different monovalent, SiC-bonded, optionally substituted C1-12 hydrocarbon radicals, R1 are identical or different monovalent, optionally substituted C1-12 hydrocarbon radicals or are a bridging alkylene radical, X is an organic or inorganic anion, R2 is a divalent hydrocarbon radical having at least 4 carbon atoms which contains at least one hydroxyl group and is optionally interrupted by one or more oxygens, b is an integer from 1 to 200 and n is an integer from 1 to 50. and processes for the preparation thereof.
摘要:
A coating composition comprising the reaction product of a benzotriazole compound having a polymerizable vinyl group and a hydroxyl group with a silane compound and/or a (partial) hydrolyzate thereof is applied to plastic substrates, typically polycarbonate resin substrates to form transparent coatings having improved mar, weather and chemical resistance.
摘要:
The present invention relates to new alkoxysilane-functional piperazinone derivatives, a process for their production, as well as their use as additives in sealants, adhesives, lacquers or coating agents.
摘要:
The invention relates to a method of improving corrosion resistance of a metal. The method comprises applying a solution containing one or more amino silanes in admixture with one or more multi-silyl-functional silanes to a metal substrate in order to form a long term corrosion resistant coating. The method is particularly suitable for use on cold-rolled steel, zinc, iron, aluminium and aluminium alloy surfaces.
摘要:
This invention relates to polyurethane prepolymers which comprise alkoxysilane terminal groups and which are based on special, very high molecular weight polyurethane prepolymers, to a method of producing them and to their use as binders for low-modulus sealing materials.
摘要:
The present invention relates to polyurethane prepolymer having terminal alkoxysilane and OH groups which is the reaction product of A) a polyurethane prepolymer prepared by incomplete reaction of i) an aromatic, aliphatic or cycloaliphatic diisocyanate component having an NCO content of 20 to 60% by weight with ii) a polyol component comprising a polyoxyalkylene diol having a number average molecular weight of 3000 to 20,000, wherein the reaction is stopped after 50 to 90% of the OH groups of component ii) are reacted and 10 to 50% are unreacted, with B) a compound having alkoxysilane and amino groups, preferably a compound containing alkoxysilane and aspartate groups. The present invention also relates to a process for preparing these polyurethane prepolymers containing terminal alkoxysilane and OH groups and to isocyanate-free, sealants, adhesives, primers and coatings containing these polyurethane prepolymers containing terminal alkoxysilane and OH groups as binders.
摘要:
A polyimide silicone resin composition comprising a polyimide silicone resin having recurring units of formula (1), a (meth)acrylic compound, and a polymerization initiator has fluidity at 25° C. despite the substantially absence of a solvent. In formula (1), X is a tetravalent organic group, Y is a divalent organic group, Z is a divalent organic group having an organosiloxane structure, p and q are positive numbers. The composition using the reactive (meth)acrylic compound as a diluent for the polyimide silicone resin is substantially free of a solvent and thus eliminates the step of solvent removal while it is highly adherent to various shapes of substrates
摘要:
A room temperature curable organopolysiloxane composition of the ketone removal type comprising a diorganopolysiloxane having a minimized content of low-molecular-weight organopolysiloxanes as a base polymer, and an alkenoxysilane as a crosslinking agent does emit essentially no low-molecular-weight siloxanes and organic matter with the passage of time after curing and is suitable for use as a sealant in a clean room and as a sealant or adhesive on electrical and electronic parts.
摘要:
A polyimide silicone resin which contains not more than 300 ppm of a cyclic siloxane oligomer having 10 or less silicon atoms, has a glass transition point of 250° C. or below and is soluble in an organic solvent. This polyimide silicone resin is produced using a diamine containing a diaminosiloxane containing not more than 300 ppm of the cyclic siloxane oligomer. Also disclosed is a polyimide silicone resin composition including 50 to 99% by mass of the polyimide silicone resin and 1 to 50% by mass of an epoxy compound. The polyimide silicone resin has been made to less contain the cyclic siloxane oligomers causative of trouble in electrical contacts, and promises a good adhesiveness or bond strength to substrates and a high reliability.
摘要:
The present invention provides polydiorganosiloxane oligourea segmented copolymers. The copolymers contain soft polydiorganosiloxane units, hard segments that are diisocyanate residues, the polydiorganosiloxane units and diisocyanate residues being connected by urea linkages, and terminal groups that are non-reactive, reactive under free radical or moisture cure conditions, or amines. The invention also provides methods of preparing the copolymers.