摘要:
A carborane siloxane base polymer is formulated into a crosslinked, rubbery high temperature material by incorporating a vinyl group in the backbone of the polymer. By careful control of process variables, the crosslinked polymer allows formation of optically clear and thermally stable adhesive bonds between a number of substrates. While curing is conveniently done at ambient temperature, the adhesive can withstand thermal cycling to over 600.degree. C.
摘要:
An aqueous adhesive composition containing a chlorosulfonated polyethylene latex, a polymaleimide compound, a nitroso compound and a metal oxide. The adhesive composition can be effectively utilized without a primer component and exhibits an unusually high resistance to pre-bake conditions and adverse environments. The adhesive also possesses the ability to effectively bond a variety of substrates.
摘要:
A coupling agent for vulcanizable mixtures of rubbers and mineral fillers which is the reaction product of a 2(3)-chloroacetoxy-5-(2'-trialkoxysilyethyl)norbornane of the formula: ##STR1## wherein R.sup.1 is methyl and/or ethyl, with a thiosulfonic acid salt of the formula:R.sup.2 --SO.sub.2 SMe (II)wherein R.sup.2 is a (cyclo)aliphatic or aromatic hydrocarbon radical having up to 20 carbon atoms, and Me is sodium or potassium.
摘要:
There are provided new articles comprising elements having surfaces bonded together with a bonding resin which is an elastomeric copolymer of about 15 to 45 mol %, preferably about 25 to 35 mol % trioxane, about 55 to 85 mol %, preferably about 65 to 75 mol % of 1,3-dioxolane, said mol percents based on the total of trioxane and 1,3-dioxolane, and about 0.005 to 0.15 wt. %, preferably about 0.05 to 0.12 wt. % of 1,4-butanediol diglycidyl ether or butadiene diepoxide as a bifunctional monomer, based on the total weight of copolymer. Preferably, at least one of said surfaces, and more preferably at least two of said surfaces bonded to each other are of a crystalline acetal polymer comprising at least 85 mol % of polymerized oxymethylene units.
摘要:
A hot-melt compound comprising 30 to 70% by weight of a modified ethylene..alpha.-olefin copolymer rubber having a melt index of at most 500 and prepared by grafting an unsaturated carboxylic acid or derivative thereof to an ethylene..alpha.-olefin copolymer rubber or a partial ester of said modified copolymer rubber and 70 to 30% by weight of a tackifier.
摘要:
Novel structural adhesive systems for metal-bonding applications. The adhesives, comprising a solution or dispersion of a polymeric material in a monomer copolymerizable therewith having incorporated therein certain phosphorus-containing compounds, are characterized by an unexpected ability of providing strong adhesion to untreated metal surfaces without adversely affecting adhesive performance, including resistance to deleterious environments. The environmental resistance of the herein described adhesives can be further improved by the addition of one or more polybasic lead salts, metal molybdates and metal phosphates.
摘要:
A graft copolymer is disclosed made from a trunk copolymer of ethylene and .alpha.,.beta.-ethylenically unsaturated monocarboxylic acid partially neutralized by zinc, cadmium, or lead ions and from branches of polyamide oligomers. The metal ions facilitate grafting polyamide to monocarboxylic groups.
摘要:
Inclusion of an effective amount of substantially anhydrous acetic acid in a zinc oxide cured liquid polysulfide polymer based composition results in a cured composition which is suitable for extrusion under heat and pressure and which on cooling reverts to a rubbery solid with essentially unchanged physical properties. The compositions are useful for the manufacture of sealants and extrudible goods such as hoses.
摘要:
This invention discloses solid, homogeneous and essentially random terpolymers of styrene, isobutylene and beta-pinene having a number average molecular weight of from about 1500 to about 7000, a styrene content of from about 40 to about 60 weight percent, an isobutylene content of from about 10 to about 40 weight percent, a beta-pinene content of from about 10 to about 40 weight percent and a ring and ball softening point of from about 160.degree. to about 240.degree.F.