摘要:
The present invention provides a process for preparing phosphorus and halogen containing polymers useful as flame retardant additives in cellulose acetate or cellulose triacetate fibers or films. The phosphorus and halogen containing polymers may be prepared by reacting a halogenated derivative of bis-hydroxyethyl terephthalate with a halogen containing phosphorus monomer having the formula ##STR1## wherein R represents a radical selected from the group consisting of (a) alkyl, (b) bromoalkyl, (c) chloroalkyl, (d) alkylamido and (e) dialkylamido radicals, wherein the alkyl substituents of the foregoing may contain from 1 to 10 carbon atoms, (f) cyclohexyl, (g) phenyl, (h) benzyl, (i) tolyl, and (j) xylyl, and X represents a halogen atom (preferably chlorine or bromine). Cellulose acetate and cellulose triacetate fibers and films containing as little as two percent by weight of the polymeric flame retardant additives are rendered both non-burning and resistant to loss of the polymeric flame retardant additive during use.
摘要:
This invention relates to high molecular weight polyamide resin compositions which are uniquely stable under hydrolytic conditions. The polyamide resin compositions are produced by the condensation of a diamine with a sterically-hindered neo-acid derivative such as .alpha.,.alpha.,.alpha.',.alpha.'-tetramethyl-p-phenylenediacetic acid.
摘要:
This invention provides high temperature performance polyester resins which contain polyphenyl ether blocks as recurring structural units. The polyester resins are melt stable at temperatures up to about 400.degree. C.
摘要:
This invention provides high temperature performance polyurea resins which contain polyphenyl ether blocks as recurring structural units. The polyurea resins are melt stable at temperatures up to about 400.degree. C and higher.
摘要:
This invention relates to high molecular weight polyester resin compositions which are uniquely stable under hydrolytic conditions. The polyester resin compositions are produced by the condensation of a dihydric polyol with a sterically-hindered neo-acid derivative such as .alpha.,.alpha.,.alpha.',.alpha.'-tetramethyl-p-phenylenediacetic acid.
摘要:
Curable compositions are provided by the interaction of bis(2-hydroxyethyl) tetrachloroterephthalate with acrylic acid derivatives to form flame retardant unsaturated esters of tetrachloroterephthalic acid.
摘要:
This invention provides an improved process for producing alkyl ethers of polygalactomannan gum by contacting polygalactomannan gum with alkyl halide in the presence of a metal hydroxide catalyst and a quaternary ammonium phase-transfer agent.
摘要:
An alkali-soluble coating formulation is disclosed. Such a coating formulation comprises a volatile, aqueous carrier; an alkali-soluble hydrophilic polymer, in the aqueous carrier; an alkali-soluble multivalent metal ion-containing bond-forming agent, also in the aqueous carrier; and an effective amount of a volatile alkali ingredient, in the aqueous carrier, for dissolving both the hydrophilic polymer as well as the multivalent metal ion-containing bond-forming agent. The relative amounts of hydrophilic polymer and multivalent metal ion-containing bond-forming agent, in the aqueous carrier, are effective for forming an alkali-soluble polymeric coating on a substrate, upon evaporation of the volatile, aqueous carrier therefrom.
摘要:
This invention relates to compatible blends of liquid crystal main chain polymers and liquid crystal side chain polymers having the same or similar mesogenic groups.
摘要:
The invention relates to the preparation of N-.alpha.-alkoxyethyl-carboxylic acid amides from dimethyl acetal and a carboxylic acid amide such as acetamide and to the preparation of secondary N-vinyl carboxylic acid amides such as N-vinyl acetamide therefrom.The reaction of dimethyl acetal and the carboxylic acid amide involves an equilibrium disproportionation wherein excess dimethyl acetal is used in sufficient amounts, e.g., in a molar ratio of from about 2 to 60:1 mole ratio, so as to force the equilibrium to the desired N-.alpha.-alkoxyethyl-carboxylic acid amide intermediate product. Equilibrium is reached in about 0.1 to 150 hours at a temperature about 0.degree. to 100.degree. C. The intermediate N-.alpha.-alkoxyethyl-carboxylic acid amide is pyrolyzed in accordance with a known pyrolysis reaction so as to obtain the corresponding N-vinyl acetamide.