摘要:
A radiation surface-curable RTV silicone composition which subsequent to radiation surface curing thereof, is interiorly moisture-curable in character. Such radiation surface-curable, interiorly moisture-curable RTV silicone composition comprises: a silanol-containing silicone; a silane cross-linker for the silicone, such cross-linker having joined directly to a silicon atom thereof an ethylenically unsaturated functional group and at least two hydrolyzable functional groups; and a photoinitiator effective for radiation surface curing of the silicone composition. Also disclosed is a "liquid potting system" formulation, which is irradiated subsequent to dispensing thereof at the potting locus, so that the radiation surface-cured skin layer overlies and contains (cooperatively with the associated bounding surface(s) of the potting locus) the uncured liquid, so that the potted structure or material is encapsulated in a liquid (damping) medium.
摘要:
The present invention relates to a process for forming a cured-in-place gasket by liquid injection molding. More particularly, the present invention relates to a low pressure and room temperature process for forming a cured-in-place gasket by liquid injection molding.
摘要:
This application relates to polysiloxane compositions grafted with improved heat curable, moisture curable, or heat/moisture curable groups. In particular, the polysiloxane compositions have reactive groups on the terminal or pendent areas of the siloxane backbone, which once reacted provide improved heat and/or moisture curable polysiloxanes.
摘要:
A room temperature vulcanizing silicone polymer composition including: a) as part of the silicone polymer, a segment including a silicone polymer of Formula (I): b) a finely-divided inorganic filler present in an amount of at least about 25% by weight of the total composition. Enhanced elongation ability is possessed by these compositions.
摘要:
An anaerobically curing composition is comprised of (i) a silicone fluid formed as the reaction product of at least one first silane of formula I:R.sub.n Si(X).sub.4-n (I),wherein the R groups are the same or different and selected from the group consisting of hydrogen, C1-C12 alkyl, C6-C12 aryl, C7-C18 arylalkyl, C7-C18 alkylaryl, haloalkyl, haloaryl and monovalent ethylenically unsaturated radicals excluding (meth)acryloxy functional groups, X is a hydrolyzable functionality, and n is an integer of from 0 to 3, and at least one second silane of formula II:R.sup.1.sub.m R.sup.2.sub.p Si(X).sub.4-(m+p) (II),wherein R.sup.1 is a (meth)acrylic functional group and R.sup.2 can be the same or different and is selected from the group consisting of monovalent ethylenically unsaturated radicals, hydrogen, C1-C12 alkyl, C6-C12 aryl, C7-C18 arylalkyl, and C7-C18 alkylaryl, X is a hydrolyzable functionality, m is an integer from 1 to 3, and m+p is an integer from 1 to 3; (ii) a polymerizable organic (meth)acrylate monomer; and (iii) polymerization initiator.
摘要:
The present invention provides curable hot melt compositions including reactive polymers, which are reinforced by organic polymers to impart higher tensile strength and elongation to the compositions upon cure. In particular, the present invention provides curable hot melt compositions including a silicone urea based polymer and a reinforcement polymer. In some embodiments, the compositions cure upon exposure to moisture and/or radiation. The compositions may be used, for example, as sealants or adhesives.
摘要:
The present invention relates to compositions which include compounds that are end-capped with silanes containing radiation cure groups. In addition, the invention relates to a method for preparing such compounds. In particular, the radiation cure groups are attached to the silane via a methylene linkage. Illustrative of the inventive compositions are those which include a compound of Formula (I):
摘要:
The invention provides fast moisture and photo/moisture curing silicone ions and methods for the preparation thereof. More particularly, the compositions are prepared from silanol and silane cappers; the cappers have an α-carbon bonded to the silicon atom allowing for a favorable hypervalent silicon transition state when reacting the silane and silanol. This favorable transition state enables both a fast endcapping reaction and contributes to the fast moisture curing properties of the inventive compositions.
摘要:
A process for producing a silicone sealant, which is stable in the absence of moisture, cures when exposed to moisture, has an elongation at break of greater than 800 percent, and has adhesion to concrete. The silicon sealant is produced by first mixing an alkoxysilethylene endblocked polymer, a dialkyldialkoxysilane, and a titanium catalyst, then mixing in precipitated calcium carbonate filler having a fatty acid surface treatment.
摘要:
The invention provides a reaction product derived from an epoxy-functional acrylic monomer and an alkylaminoalkylene polyalkoxysilane or from a reaction product derived from acrylic acid and an epoxidized polyalkoxysilane.