Nippon Petrochemicals Company, Limited

Nippon Kasei Chemical Company Limited

Takenaka Corporation

Hayashi Kasei Co., Ltd.

Hisao Kitano

Fumio Tanimoto

Yoshiharu Inoue

Yasuhiko Yoshioka

Hiroyasu Saito

Takashi Iwashimizu

Yukihiro Tanigawa

Masahiro Morozumi

Shun Suzuki

Masahiro Yamashita

Kenji Hayashi

An admixture for cement compositions is prepared by calcining at 630.degree. to 870.degree. C. at least one substance selected from the group consisting of natural kaolin, halloysite and synthetic kaolin, effecting classification so that amorphous portions of alumina/silica having a mixing ratio of 0.5 to 1.3 form main components, with all particles having diameters up to 8 .mu.m and an average diameter of 0.5 to 2 .mu.m, and a specific gravity ranging from 2.45 to 2.55. This admixture is used to produce a cement composition such as mortar or concrete, which realizes excellent fluidity to promote workability, and a high strength structure.

Admixture and cement composition using same

Disclosed herein is a novel fire-retardant polyolefin composition comprising a polyolefin, an organohalogenous fire retardant and a carbonic acid ester represented by the formula (I): ##STR1## wherein R and R' respectively represent an alkyl group, an alkenyl group, an alkynyl group, a cycloalkyl group, an aralkyl group or an aryl group, Z represents a residual group of an aliphatic diol, an alicyclic diol, an aromatic diol, a diphenyl ketone diol, or a diphenylsulfone diol and n is 0 or 1.

Fire-retardant polyolefin composition

The present invention provides a method for preparing solid p-disodium hydroxybenzoate which is characterized by comprising the steps of reacting phenol, carbon tetrachloride in an amount of 0.9 to 1.2 moles per mole of phenol and sodium hydroxide in an amount of 7 to 20 moles per mole of phenol prior to the reaction in an aqueous liquid containing 10 to 40% by weight of p-disodium hydroxybenzoate and/or sodium chloride in the presence of a transition metal powder in an amount of 0.01 to 1.00% by weight based on the weight of a reaction system at a reaction temperature of 50.degree. to 150.degree. C.; cooling the resulting reaction mixture to a level of -20.degree. to +20.degree. C.; and separating said p-disodium hydroxybenzoate therefrom.

Method for preparing solid p-disodium hydroxybenzoate

A vinylnorbornyl alcohol of 5- or 6-vinyl-2-hydroxymethylbicyclo[2.2.1]heptane which is represented by the following structural formula: ##STR1## The compound has particular fragrance of a mint-like note partaking of camphor tone.

Vinylnorbornyl alcohol and perfume composition containing the same

Norbornane derivatives having hydrocarbon side chains, the processes for preparing the same and perfume compositions containing the same. The norbornane derivatives are represented by the following general formula (I) ##STR1## wherein C.sub.2 is an ethyl group, an ethylidene group or a vinyl group each connected to 5 or 6 position of the norbornane ring, each of R.sub.1 and R.sub.2 is a hydrogen atom or a methyl group, and R.sub.3 is a formyl group or a group represented by the following general formula (II) ##STR2## wherein R.sub.4 is a methyl group, an ethyl group, a n-propyl group or an isopropyl group, and X is a carbon atom of the norbornane ring. The above norbornane derivatives give a wide variety of woody fragrances and are useful as components for various perfume products.

Derivatives of norbornanes having hydrocarbon side chains and perfume

An acylnorbornanone acetal is represented by the formula: ##STR1## (wherein R.sub.1 is a saturated hydrocarbon group having 2 to 7 carbon atoms and R.sub.2 is a hydrogen atom or a hydrocabon group having 1 to 10 carbon atoms). The acylnorbornanone acetal is prepared by oxidizing an .alpha.-hydroxyalkylnorbornanone acetal represented by the formula: ##STR2## (wherein R.sub.2 is a hydrogen atom or a hydrocarbon group having 2 to 7 carbon atoms). The perfume composition contains as a perfume component the acylnorbornanone acetal as represented above.

Acylnorbornanone acetals, process for preparing the same, and perfume

The substituted norbornanones represented by general formula (I): ##STR1## (wherein R.sub.1 is an alkenyl group having 2 or 3 carbon atoms or an alkylidene group having 1 to 3 carbon atoms and R.sub.2 is a saturated hydrocarbon group having 2 to 7 carbon atoms with the dotted line between the two carbon atoms indicating a single bond when R.sub.1 is an alkenyl group and a double bond when R.sub.1 is an alkylidene group) are useful for perfume compositions. The substituted norbornanones represented by the general formula (I) may be prepared from the corresponding alkenyl or alkylidene norbornanones with diols in the presence of an acid catalyst.

Substituted norbornanone acetals, process for preparing the same, and

Disclosed in this invention are a novel compound tris(3-acetylthiopropyl)isocyanurate which can serve as an intermediate for the preparation of tris(3-mercaptopropyl)isocyanurate useful as a polymerization reaction regulator, crosslinking agent, curing agent, lubricant adjunct, etc., and a process for preparing the said compound, as well as a process for preparing tris(3-mercaptopropyl)isocyanurate using the said compound as an intermediate.

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Osaka, Japan

Hisao Kitano