摘要:
An acetylene carbamide derivative of the general formula (I): ##STR1## wherein A represents ##STR2## wherein R.sub.1 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, is disclosed. A process for producing the acetylene carbamide derivative of the general formula (I) is also disclosed. The acetylene carbamide derivative of the invention is useful as a stabilizer for organic substances from heat and oxidation.
摘要:
There are provided piperidine derivatives having the formula ##STR1## wherein R represents a hydrogen atom or a C.sub.1 -C.sub.3 group, and R.sup.2 and R.sup.3 represent a hydrogen atom or taken together, form ##STR2## There is also provided a method for producing the above compounds which comprises reacting a tricetonamine derivative represented by the formula ##STR3## wherein R has the same meaning as described above, or its salt with sorbitol.The subject piperdine derivatives are useful as stabilizers for preventing the deterioration of polymers by light.
摘要:
Bisphenol derivatives of the formula (I), ##STR1## are produced by reacting a carboxylic acid, RCOOH (II), with a bisphenol of the formula (III), ##STR2## adding a halogenating agent in the presence of a dehydrohalogenating agent. The product bisphenol derivatives are useful as antioxidants.
摘要:
Phenolic compounds and methods of producing such phenolic compounds are disclosed, said compounds being of the formula: ##STR1## wherein n' is an integer from 1 to 3, and R.sub.1 is a hydrogen atom, or an alkyl group having 1 to 4 carbon atoms or an acyl group having 1 to 5 carbon atoms.These compounds are suitable as stabilizers for synthetic resins with at least one sulfur compound of the following formulas: ##STR2## wherein R.sub.2 is an alkyl group having 4 to 20 carbon atoms, and ##STR3## wherein R.sub.3 is an alkyl group having 3 to 18 carbon atoms, and R.sub.4 and R.sub.5 each independently is a hydrogen atom or an alkyl group having 1 to 6 carbon atoms,in the ratio (I):(II) of 1:0.5-15 by weight.
摘要:
A stabilized polyolefin composition having improved weathering resistance is provided, whereby the following four components are incorporated into a polyolefin:(A) a hindered piperidine compound having a molecular weight of more than 750, such as poly-{[6-morpholino-1,3,5-triazine-2,4-diyl][2,2,6,6-tetramethyl-4-piperidyl)imino]hexamethylene[2,2,6,6-tetramethyl-4-piperidyl)imino]},(B) a hindered piperidine compound having a molecular weight of less than 500, such as bis(2,2,6,6-tetramethyl-4-piperidyl) sebacate,(C) a benzoate compound such as 2,4-di-t-butylphenyl 3,5-di-t-butyl-4-hydroxybenzoate, and(D) a phosphorus-containing compound such as bis(2,4-di-t-butylphenyl) pentaerythritol diphosphite.
摘要:
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.