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4429112 |
Process of delaying cure of curable resin composition containing cyanate ester compound with benzene sulfonic acid compound
A method for delaying curing rate of a curable resin composition comprising a polyfunctional cyanate ester compound or mixture of a polyfunctional cyanate ester compound and a polyfunctional...
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4429093 |
Cyclic perfluoroaliphaticdisulfonimides as polymerization catalysts
Acidic cyclic perfluoroaliphaticdisulfonimides, salts thereof, a process for making the same, curable compositions containing acidic cyclic perfluoroaliphaticdisulfonimides or salts thereof and...
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4424353 |
Bicyclic amidines
New amidine/isocyanate adducts are particularly useful as catalysts for hardening epoxy resins, in particular pulverulent coating compositions based on epoxy resins. New bicyclic amidines are...
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4423197 |
Cyclic perfluoroaliphatic-disulfonic acid anhydrides and sulfonamide derivatives thereof
Cyclic perfluoroaliphaticdisulfonic acid anhydrides, sulfonamide derivatives thereof, a process for making the same, curable compositions containing cyclic perfluoroaliphaticdisulfonic acid...
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RE31468 |
Liquid reactive polymers
Terminally unsaturated liquid epihalohydrin polymers are produced by polymerizing at least one epihalohydrin using hydroxyalkyl acrylate or methacrylates as a modifier. The polymerization is...
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RE31469 |
Reactive liquid polymers
Terminally unsaturated liquid epihalohydrin polymers are produced by polymerizing at least one epihalohydrin using acrylic acid or methacrylic acid as a modifier. The polymerization is conducted in...
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4414384 |
Synthesis and polymerization of 3-azidooxetane
3-Azidooxetane, ##STR1## is prepared by reacting 3-oxetyl p-toluenesulfonate with an alkali metal azide in a polar solvent. In the presence of a Lewis acid catalyst, 3-azidooxetane polymerizes to...
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4412047 |
Cycloaliphatic diepoxide, its preparation and its use
1,5-Dimethyl-1,2;5,6-diepoxycyclooctane is prepared by epoxidizing 1,5-dimethylcycloocta-1,5-diene with aqueous peracetic or perpropionic acid at a temperature not exceeding 50° C. and within a pH...
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4405762 |
Preparation of hydroxy-terminated poly(3,3-bisazidomethyloxetanes)
Polymerizing 3,3-bischloromethyloxetane to yield halomethyl polymer products having hydroxy functionality and a molecular weight between about 500-15,000 followed by reacting such products with...
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4405765 |
Curable epoxy resins
A curable resin is composed of A. an epoxy resin and B. a pyrylium salt as a catalyst, with or without C. a metal chelate or metal salt as a co-catalyst. Preferred pyrylium salts are those...
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4405766 |
Phosphonium bicarbonate catalysts for promoting reaction of epoxides with carboxylic acids or anhydrides
Tetrahydrocarbyl phosphonium bicarbonate salts are employed as catalysts to promote the reaction between (a) vicinal epoxides and (b) carboxylic acids or anhydrides. These catalysts are...
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4404355 |
Heat curable epoxy resin compositions
The invention relates to heat curable epoxy resin compositions consisting of an epoxy resin containing, on average, more than one epoxide group per molecule, an aromatic onium salt as catalyst, a...
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4398014 |
Sulfoxonium salts and their use as polymerization catalysts
New aromatic sulfonylsulfoxonium salts are of formula ##STR1## where q is 1 to 4, R denotes an aliphatic, cycloaliphatic, or aromatic group, R 6 denotes H, an alkyl or aralkyl group, or a...
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4393199 |
Cationic polymerization
Method of carrying out cationic polymerization with molecular weight control in which a preinitiator precursor, e.g. a diol and a catalyst effective for cationic polymerization (or a preformed...
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4391970 |
Process for preparing colorless hydroxyl epihalohydrin polymers
In a process for the polymerization of an epihalohydrin wherein the catalyst (initiator) employed is a trialkyl oxonium salt of an HMF 6 acid wherein M is a Group V element selected from the group...
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4387215 |
Polycyclic ring-opened polymers
This invention relates to the process and the product by process of the polymers formed by the polymerization of polycyclic ring-opening monomers. More particularly, this invention relates to the...
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4387222 |
Cyclic perfluoroaliphaticdisulfonimides
Acidic cyclic perfluoroaliphaticdisulfonimides, salts thereof, a process for making the same, curable compositions containing acidic cyclic perfluoroaliphaticdisulfonimides or salts thereof and...
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4387216 |
Heat-polymerizable compositions comprising epoxide resins, aromatic sulfoxonium salts, and organic oxidants
Certain classes of aromatic sulfoxonium salts, such as dimethylphenacylsulfoxonium and acetanilinodimethylsulfoxonium hexafluorophosphates, have little or no effect on prolonged heating with...
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4382130 |
Moisture curable compositions and aryloxyphosphonium salts
Certain aryloxyphosphonium salts have been found to be effective as curing agents for various cationically polymerizable organic materials, such as epoxy resins, when incorporated into such...
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4378277 |
Photopolymerizable epoxy-containing compositions
Photopolymerizable epoxy compositions which comprise an epoxy-containing material and photosensitive aromatic iondonium salt of a halogen-containing complex ion are described as are coated...
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4371713 |
Process for the preparation of polyether glycol
In the process for preparing polyether glycol comprising (A) polymerizing tetrahydrofuran or a mixture of tetrahydrofuran and other copolymerizable cyclic ether(s) in the presence of a ring-opening...
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4365056 |
Process for producing 2-(C.sub.1 to C.sub.3 alkyl)-Δ.sup.2 -oxazoline copolymers
A process for producing linear or slightly branched 2-(C 1 to C 3 -alkyl)-Δ 2 -oxazoline copolymers from more than 50 mole % of 2-(isopropyl- and/or n-propyl)-Δ 2 -oxazoline and less than 50...
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4339567 |
Photopolymerization by means of sulphoxonium salts
Substances (I) capable of being converted into higher-molecular weight materials under the influence of a cationic catalyst, such as 1,2-epoxides, aminoplasts, vinyl monomers or prepolymers, or...
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4329445 |
Process for preparing a tetrahydrofuran-alkylene oxide copolymer with treated bentonite catalyst
A modified montmorillonite clay is prepared by heating it, impregnating it with an organic liquid, acid-activating it with a strong acid, and then washing it with water until it is substantially...
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4328149 |
Polymerization method utilizing a three-phase emulsion system
Polymerization method utilizing a three-phase system: water-in-oil-in-water or oil-in-water-in-oil comprising the steps (a) adding the monomer material to be polymerized into the innermost water or...
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4316001 |
Anionic polymerization of heterocyclic monomers with alkali metal amide hydroxylated compound initiator
An initiator for the anionic polymerization of heterocyclic monomers comprises the product from the association of an alkali metal amide and the salt from at least one hydroxylated compound with...
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4315830 |
Method for altering the characteristics of polymers
A method for altering the characteristics of liquid telechelic polymers by means of reducing the reactive group content and adjusting the viscosity of a given liquid telechelic polymer. This is...
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4306953 |
Cationically polymerizable compositions containing sulfonium salt photoinitiators and stable free radicals as odor suppressants and _method of polymerization using same
Photopolymerizable compositions using sulfonium salt photoinitiators to effect polymerization of cationically polymerizable monomers additionally include a stable free radical to reduce or...
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4299993 |
Method for increasing the primary hydroxyl end groups in polyethers
A method for increasing the primary hydroxyl end groups in polyethers includes the steps of charging a reaction vessel with tetrahydrofuran and propylene oxide, adding BF 3 or a BF 3 -containing...
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4299938 |
Photopolymerizable and thermally polymerizable compositions
Substances (I) capable of being converted into higher-molecular weight materials under the influence of a cationic catalyst, such as 1,2-epoxides, aminoplasts, vinyl monomers or prepolymers, or...
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4297457 |
Curable epoxy resin composition
Aryl esters exhibit enhanced characteristics as accelerators in the cure of epoxy resins when utilized in combination with a cure initiator, such as an organic titanate or zirconate.
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4296231 |
Curable epoxide resin mixtures
The use of compounds of the formula ##STR1## in which m is a number from 3 to 10, X is a grouping of the formula in which R is an alkyl having 4 to 10 C atoms or a phenyl which is unsubstituted or...
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4294746 |
Stabilizers for cycloaliphatic epoxide containing compositions
Described herein are stabilizers for curable compositions containing cycloaliphatic epoxides and a catalyst. A molded article produced from such a composition possesses high mechanical properties.
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4289595 |
Ambient temperature curing photopolymerizable epoxide compositions utilizing epoxide ethers and methods
Photopolymerizable epoxide compositions are provided which contain photoinitiators decomposable upon exposure to electromagnetic radiation to produce a Lewis acid and polymerizable epoxide...
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4273914 |
Pre-reacted carboxylic acid anhydride complexes as low temperature curing agents for epoxy resins
A low temperature, fast curing epoxy insulating composition is made by low temperature mixing an epoxy resin with a carboxylic acid anhydride complex, the anhydride complex being the low...
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4273668 |
Arylsulfonium salt-solvent mixtures
Onium salts of Group VIa elements which have an MF 6 - anion, where M is selected from P, As and Sb, have been found to be photoactive under ultraviolet light. These onium salts can be...
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4259454 |
Curable organic resin compositions and foaming method
Curable organic resin compositions, such as epoxy resins, are provided, based on the use of dialkyl hydroxy arylsulfonium salts in combination with certain orgainc oxidants such as iodosoaromatic...
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4220753 |
Alkyl alkoxymethylbenzoates
Alkyl alkoxymethylbenzoates and essentially linear polyester ethers and copolyester ethers therefrom.
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4219638 |
Polyether diureide epoxy additives
An epoxy resin having superior resistance to thermal shock comprises a vicinal polyepoxide, a curing amount of a certain bicyclic anhydride and an effective amount of a certain bicyclic anhydride...
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4214070 |
Polymers of 2-ketopentafluoropropanesulfonic acid and related acids with ethylene or fluorinated unsaturated monomers
2-Ketopentafluoropropanesulfonic acid is obtained as a product of the reaction of sulfur trioxide and ethyl pentafluoroisopropenyl ether or by transesterification from corresponding esters. Similar...
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4206295 |
Process of preparing poly[{alkyl-(3-ammoniopropyl)iminio}trimethylene dihalides]
Novel polymers having a linear backbone which is free from both branching and cross-linking, comprising quaternized nitrogen atoms linked to each other through trimethylene groups. By the term...
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4205064 |
Bile acid sequestering composition containing poly[{alkyl-(3-ammoniopropyl)imino}-trimethylenedihalides]
Novel polymers having a linear backbone which is free from both branching and cross-linking, comprising quaternized nitrogen atoms linked to each other through trimethylene groups. By the term...
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4201854 |
Curable epoxide resin mixtures
Curable mixtures of polyepoxide compounds which contain an amine curing agent have longer curing times, and thus, in particular, good workability when used as adhesives, when...
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4195167 |
Gradient polymers of two or more cyclic, organic, ring-opening, addition polymerizable monomers and methods for making same
Polymers which comprise polymer chains along which the proportion of mer units provided by a first heterocyclic monomer gradually increases in a given chain length as the proportion of mer units...
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4191677 |
Self-locking threaded fastener product
This disclosure relates to a new self-locking threaded fastener means having a patch on the threaded portion thereof to provide self-locking properties. The patch may be comprised of a...
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4161575 |
Catalyst for epoxy powder coatings
This invention relates to a catalyst system comprising a triethylene diamine salt of thiocyanic acid for epoxy powder coatings, the epoxy compound having a lower softening point of not less than...
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4159976 |
Curable systems containing epoxy resin and methanol or ethanol solvent to suppress the catalytic reaction between epoxy resin and an imidazole catalytic curing agent
A curable system such as a curable adhesive type system having a relatively long pot life is disclosed. The curable system of the present invention comprises polymer containing material including...
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4153786 |
Method for preparing ester end-capped copolyether glycols
Ester end-capped copolyether glycol is prepared by copolymerizing tetrahydrofuran and an alkylene oxide or cyclic acetal in a reaction mixture which contains, in addition to the tetrahydrofuran and...
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4140847 |
Polymers of oxetane-spiro-cyclic polyethers
Novel linear, branched and cyclic polymers of the repeating unit ##STR1## wherein R is ethylene or propylene bearing from zero to six methyl groups and m and n are lower integers and a process for...
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4127562 |
Method of preparing coatings
A method of producing coatings on the basis of two-component systems composed of 1,2-epoxy compounds having at least one 1,2-epoxy group in the molecule, plus cyclic amidines and the conventional...
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