Sumitomo Chemical Company, Limited

Takeshi Takata

Shinichi Yachigo

Manji Sasaki

Shinya Tanaka

Kikumitsu Inoue

Yukoh Takahashi

Haruki Okamura

Hideo Nagasaki

Tatsuo Kaneoya

Hiroki Yamamoto

Kanako Ida

Taisuke Okita

Fumitoshi Kojima

Shin-ichi Yachigo

A compound represented by the formula of: ##STR1## wherein R is hydrogen or methyl. This compound is useful as a stabilizer for butadiene polymers.

Phenolic compound and its use as stabilizer for butadiene polymer

A butadiene polymer composition containing a phenolic compound represented by the formula: ##STR1## wherein R.sub.1 is an alkyl having 1 to 4 carbon atoms;

Butadiene polymer composition contains phenolic compound and

A butadiene polymer composition containing a phenolic compound represented by the formula: ##STR1## wherein R.sub.1 is an alkyl having 1 to 4 carbon atoms, R.sub.2 and R.sub.3 are each independently a group represented by --C(CH.sub.3).sub.2 --R' in which R' is an alkyl having 1 to 5 carbon atoms or phenyl, and R.sub.4 is hydrogen or methyl, and a phosphorus-containing compound represented by the formula: ##STR2## wherein R.sub.5 and R.sub.6 are each independently an alkyl having 1 to 9 carbon atoms. The composition is stable against the thermal deterioration and discoloration in the absence of oxygen as well as against the exposure to oxides of nitrogen gas.

Butadiene polymer composition containing phenolic compound and

A stabilized polyolefin composition having improved weathering resistance is provided, whereby the following four components are incorporated into a polyolefin:

Stabilized polyolefin composition

A compound represented by the formula of ##STR1## wherein R.sub.1 represents an alkyl having 1 to 5 carbon atoms;

Hydroquinone type compound and its use as stabilizer for synthetic resin

A process for producing a bisphenol compound useful as deterioration preventor capable of stabilizing organic substances against the decompositions caused by heat, light and oxygen, represented by the following general formula: ##STR1## wherein R.sub.1 represents alkyl group having 1 to 3 carbon atoms, alkenyl group having 2 to 4 carbon atoms, phenyl group or 2-phenylethenyl group; R.sub.2 represents alkyl group having 1 to 5 carbon atoms, or cyclohexyl group; R.sub.3 represents alkyl group having 1 to 9 carbon atoms, cyclohexyl group or phenyl group; and R.sub.4 represents alkyl group having 1 to 11 carbon atoms or phenyl group, which comprises reacting a carboxylic acid represented by the following general formula: ##STR2## wherein R.sub.1 is as defined above, with a bisphenol compound represented by the following general formula: ##STR3## wherein R.sub.2, R.sub.3 and R.sub.4 are as defined above, by the use of a halogenating agent in the presence of a dehydrohalogenating agent, as well as butadiene polymer compositions containing said bisphenol compounds.

Thermally stabilized butadiene resins containing a hindered phenolic

A butadiene polymer composition having incorporated the following stabilizers therein: A phenolic compound (I) of the formula: ##STR1## wherein R.sub.1 represents a C.sub.1 -C.sub.4 alkyl group, and a sulfur-containing compound (II) represented by the general formula, ##STR2## wherein R.sub.2 and R.sub.3 independently represent a hydrogen atom or a C.sub.1 -C.sub.6 alkyl group, and R.sub.4 represents a C.sub.3 -C.sub.18 alkyl group, wherein the weight ratio of (I) to (II) is 1 to 0.5-10. The butadiene polymer composition of the present invention is quite effective to prevent gel formation caused by heat, especially in the absence of oxygen.

Growing community of inventors

Nishinomiya, Japan

Takeshi Takata