摘要:
A melt-processable fluorine-containing resin composition having an improved thermal stability which comprises a tetrafluoroethylene copolymer, a chlorotrifluoroethylene homo- or co-polymer, or a vinylidene fluoride homo- or co-polymer and at least one thermal stabilizer selected from the group consisting of an amine antioxidant, an organosulfurous compound, an organo tin antioxidant, a tin powder and a zinc powder. The composition can be advantageously processed without causing any trouble even at an optimum sintering temperature of the fluorine-containing resin.
摘要:
N-sulfonyl-sulfilimine compounds such as S,S-di(isopropyl)-N-(p-toluenesulfonyl) sulfilimine are used as premature vulcanization inhibitors in polymers compounded for sulfur vulcanization.
摘要:
Process for the modification, e.g. cross-linking, of polymers containing C.dbd.C or C.tbd.C unsaturation by reacting them with nitrile sulphides or precursors therefor. A preferred system entails mixing the polymer with a 5-R-substituted-1,3,4-oxathiazol-2-one and heating the mixture to a temperature at which the nitrile sulphide is generated.
摘要翻译:用于修饰的方法,例如 通过使它们与腈硫化物或其前体反应,交联含有C = C或C 3 CON C不饱和度的聚合物。 优选的系统需要将聚合物与5-R取代的1,3,4-氧杂噻唑-2-酮混合,并将该混合物加热到产生腈硫化物的温度。
摘要:
Sulfonylarylhydrazides are used as latent catalysts for condensation reactions, particularly in the curing of solventless heat-setting printing ink compositions.
摘要:
A modified rubbery terpolymer, and blends thereof, which comprises the admixture product of a rubbery terpolymer of ethylene, .alpha.-olefin and non-conjugated diene with at least one compound selected from specific types of N-chlorothiocarboxylic acid amides and imides. The sulfur-cured composites are particularly useful in the sidewall portions of pneumatic tires.
摘要:
Ionically crosslinked polymers are plasticized by blending the ionic compositions with a plasticizer which is normally liquid and non-volatile, the plasticizer compounds having a solubility parameter of at least 9.0. The plasticizers are preferential plasticizers for their ionic domains and do not ordinarily plasticize the polymeric backbone.
摘要:
Vulcanizable rubber compositions comprising a sulfur vulcanizable rubber, sulfur, a thiazole sulfenamide accelerator, a morpholinothio amide compound, and optionally a benzothiazole or thiuram accelerator exhibit good scorch safety and yield vulcanizates having excellent original and heat aged properties.
摘要:
Compounds of the formula ##STR1## WHEREIN A is a linking group, X is an O--CO-- or --SO.sub.2 -- group and n is at least 2, are prepared from the corresponding N',N'-disubstituted hydrazides by quaternization and treatment with alkali or reaction with an alkylene epoxide or from the corresponding compound wherein n = 1 and A is a polymerizable group by polymerization. The compounds are unstable to heat and may be used as cross-linking agents for polymers or as chain-extending agents, bonding agents or adhesives.
摘要:
The present invention relates to a process for crosslinking hydrophilic colloids which contain amino-, imino- and/or hydroxyl groups. Compounds of the formula ##EQU1## are used as crosslinking agents. In the formula V and W denote hydrogen atoms or organic radicals, X and Y represent vinyl groups or substituted vinyl groups or groups which can be converted into vinyl groups, Z represents an organic bridge member and m is an integer from one to 11. The compounds used as cross-linking agents, except those of the above formula wherein X and Y represent groups which can be converted into vinyl groups, are new and form part of the invention; also forming another aspect of the invention are photographic materials containing celloids cross-linked as per the above process.
摘要:
There are prepared triazine sulphenimides of the formula ##EQU1## in which X is ##EQU2## R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are hydrogen or alkyl with 1 to 4 carbon atoms;Y is --CH.sub.2 --CH.sub.2 --; --CH.sub.2 --CH.sub.2 --CH.sub.2 --; --CH(CH.sub.3)--CH.sub.2 --; ##EQU3## ##SPC1## (where R.sup.5 and R.sup.6 are hydrogen, alkyl with 1 to 8 carbon atoms, alkylthioalkyl with a total of 2 to 8 carbon atoms, CH.sub.3 --S--, alkoxyalkyl with a total of 2 to 8 carbon atoms, CH.sub.3 O-- or phenyl); or ##EQU4## (where R.sup.7 and R.sup.8 are hydrogen, alkyl with 1 to 8 carbon atoms, allyl or phenyl). The compounds are useful as herbicides and as aids in rubber mixtures.