摘要:
A rubber composition comprising a rubber, a filler and a diamide compound represented by the formula:
wherein X is hydrogen, alkyl of 1 to 18 carbon atoms, alkoxy of 1 to 18 carbon atoms, alkanoyl of 2 to 19 total carbon atoms, amino, nitro, cyano, hydroxy, carboxy or halogen, and n is an integer of 2 to 12. This rubber composition is increased in its loss factor and is useful for tires and rubber vibration isolators. For example, the resulting tires prepared from the rubber composition are improved in their gripping performance.
摘要:
A polypropylene resin containing an α-olefinic copolymer rubber and an inorganic filler is stabilized by incorporating therein the following 6 components:
(A) a hindered phenolic compound having a molecular weight of not less than 500, (B) a high-molecular hindered piperidine compound such as poly[{6-(1,1,3,3 - tetramethylbutyl)amino-1,3,5-triazine-2,4-diyl}{(2,2,6,6-tetramethyl-4-piperidyl)-imino}hexamethylene{(2,2,6,6-tetramethyl-4-piperidyl)-imino}], (C) a low-molecular hindered piperidine compound such as 2-methyl-2-(2,2,6,6-tetramethyl-4-piperidyl)amino-N-(2,2,6,6-tetramethyl-4-piperidyl)-propionamide, (D) a benzoate compound such as 2,4-di-t-butylphenyl 3,5-di-t-butyl-4-hydroxybenzoate, (E) a phosphorous compound such as bis(2,4-di-t-butylphenyl) pentaerythritol diphosphite, and (F) an amide compound such as ethylenebisstearylamide. This composition may also contain a sulfur compound such as dialkyl thiodipropionate and pentaerythritol tetrakis(3-alkylthiopropionate). The composition disclosed is stable not only against heat and oxidation but also against light.
摘要:
A rubber composition comprising a base rubber, carbon black and a dinitrodiamine compound represented by the formula [I], wherein X is a divalent aliphatic, alicyclic or aromatic group which may contain halogen or oxygen in the group, R¹ is hydrogen or an aliphatic, alicyclic or aromatic group, provided that two nitrogen atoms linking through X may further link through R¹ when both X and R¹ are the aliphatic groups, and R² and R³ independently of one another are each hydrogen or an alkyl of 1 to 12 carbon atoms, provided that R² and R³ may conjointly form a ring, is improved in its scorching without deterioration in its dynamic properties by incorporating thereto the following components (A) or (B):
(A) N-(cyclohexylthio)phthalimide and a bismaleimide compound, or (B) 2,3,5,6-tetrachloro-1,4-benzoquinone.
摘要:
Inorganic fiber such as carbon fiber is modified by a surface treatment with a dinitrodiamine compound represented by the formula of wherein X is a divalent aliphatic, alicyclic or aromatic group which may contain halogen or oxygen in the group, R¹ is hydrogen, an aliphatic group, an alicyclic group or an aromatic group, with the proviso that two nitrogen atoms linking through X may further link through R¹ when both X and R¹ are the aliphatic groups, and R² and R³ independently of one another are each hydrogen or an alkyl of 1 to 12 carbon atoms, with the proviso that R² and R³ may conjointly form a ring. The inorganic fiber thus modified is useful for reinforcement of resins.
摘要:
The invention provides a 2,2,6,6-tetramethylpiperidine derivative represented by the formula (l). wherein R, and R 2 independently represent a hydrogen atom or methyl group, R 3 represents an alkylene group having one to four carbon atoms. These derivatives, which may be accompanied by the corresponding monoester derivative when prepared by the described method, are effective photo-stabilizers for synthetic resins.
摘要:
The invention provides antioxidant compounds of formula These are made by reacting the corresponding phenol monoacrylates and disubstituted phosphonites, and are effective to stabilize organic substances, especially polyolefins against deterioration by heat, light and oxidation. A stabilized polyolefin composition preferably contains such stabilizer plus phenol-type (and optionally sulfur-containing) antioxidant.