摘要:
A method of conducting controlled radical polymerization, including: (a) providing a mixture of at least one monomer; at least one monomer solvent; at least one compound metal coordinating capable; and at least one initiator; (b) directing the mixture at a rate over a solid catalyst surface contained in an external chamber to the vessel, the catalyst including a metal or metal compound capable of at least two oxidation states; (c) monitoring the reaction vessel temperature; (d) adjusting the flow rate when the temperature is outside a selected temperature range; and (e) allowing the polymerization to proceed to desired conversion level.
摘要:
Compounds useful as adhesion promoters for thermally cured thiolene adhesives include a) acrylic or norbornene acid phosphate esters such as ##STR1## b) maleic, acrylic, methacrylic, norbornene dicarboxylic, and fumaric acids and half acid esters and peresters of maleic fumaric and norbornene dicarboxylic acids; and c) norbornene, acrylic or methacrylic silanes having two or three hydrolyzable groups bound to the silicon atom thereof, such as 5-(triacetoxysilyl) norbornene.The adhesion promoters may be employed as surface primers for conventional thiolene compositions. Alternatively the thiolene compositions themselves may be modified by addition of 0.1 to 10% by weight of the adhesion promoter. Preferred thiolene compositions employ norbornene functional ene ingredients.
摘要:
The present invention provides compound(s) selected from the group of compounds represented by structural Formula (I): wherein X, Y and R1 are as described herein, use of such compounds as anaerobic cure accelerators, and compostions including such compounds.
摘要:
A treatment method for polyene resins used in thiol-ene formulations, especially norbornene resins, significantly stabilizes thiol-ene compositions made from batches of polyene resin which otherwise give compositions with poor dark stability. The treatment comprises contacting the polyene with an amphoteric treating agent selected from the group consisting of silicated magnesium oxide, basic aluminum oxide, silica gel, magnesium oxide, magnesium hydroxide, calcium oxide, calcium hydroxide, barium oxide, and barium hydroxide, and then separating the resin from the treating agent prior to mixture with a polythiol to form a thiol-ene composition. The treatment method significantly reduces ionic content in polyene resins, particularly chloride ion but also sodium and potassium ions. Consequently, treatment is also beneficial with polyene resins which do not produce substantial dark stability problems. Reduction of the ionic content of the resin is desirable to produce cured thiolene polymers with low electrical conductivity and low corrosiveness.
摘要:
Polyorganosiloxane polymers which include at least one group of the formula: ##STR1## where R.sup.1 is an organo group; R.sup.2 is alkylene or alkenylene; G is a n+1 valent hydrocarbon, oxyhydrocarbon or poly(oxyhydrocarbon) radical in which some or all of the hydrogen atoms may optionally be substituted by halogen atoms; R.sup.3 is H or an organic functional group, particularly polymerizable groups, polymerization accelerating groups or polymerization initiating groups; n is an integer of 2 or more provided that when n is 2 and one of R.sup.3 is H, the other R.sup.3 group is also H; and a is 0, 1 or 2.Additional polyorganosiloxane polymers include at least one group of the formula: ##STR2## where R.sup.4 R.sup.5 are H or a mono valent hydrocarbon group.
摘要:
The present invention provides compound(s) selected from the group of compounds represented by structural Formula (I): wherein X, Y and R1 are as described herein, use of such compounds as anaerobic cure accelerators, and compostions including such compounds.
摘要:
Reaction products prepared from reactants including: (a) at least one compound of structural Formula (I): wherein R1 is selected from aryl and heteroaryl; X is selected from a direct bond, —O—, —S—, —NH—, alkylene, cycloalkylene, heterocyclylene, arylene, alkarylene, and heteroarylene; Y is a substituted alkylene group having at least two contiguous carbon atoms and which can be interrupted by one or more —O—, —S—, or —NH— moieties as defined herein, wherein the alkylene group of Y has substituents independently selected from —OH, —NH2, —SH, cycloalkyl, heterocyclyl, aryl, and heteroaryl, or two hydrogen atoms on the same carbon atom of Y are replaced by carbonyl, and wherein at least two substituents of Y are each independently selected from —OH, —NH2, and —SH, as defined herein; and (b) at least one isocyanate functional material.
摘要:
Products formed from chlorosulfonyl isocyanate either by sequentially reaction of a hydroxy functional compound followed by reaction of the sulfonyl chloride group with a primary or secondary amine, or by reaction of chlorosulfonyl isocyanate with an excess of primary or secondary amine, are cure accelerators for acrylic compositions. Depending on the choice of alcohol or amine, the accelerator may be functionalized so that it is bound or bindable to an organic or silicone polymer backbone or contains other desirable functionality such as peroxy, photosensitizer, or acrylic groups.
摘要:
The present invention provides compounds represented by structural Formula (III): wherein X, R1, R2, and R4 are as described herein, reaction products of compounds of Formula (III) and isocyanates, use of such compounds and reaction products as anaerobic cure accelerators, methods of making the same, and compositions including such compounds.
摘要:
The present invention provides products of isocyanate functional material(s) and compound(s) selected from the group of compounds represented by structural Formula (I): wherein X, Y and R1 are as described herein, use of such compounds as anaerobic cure accelerators, and compositions including such compounds.