Liquid stabilizing mixtures for organic polymers
OwnerFabio Broussard, Jose Roncalliinventors
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Abstract
1 Liquid stabilizing mixtures for organic polymers comprising: a) a liquid compound belonging to the group of sterically hindered phenols consisting of esters or mixtures of esters having formula (I); b) a solid compound belonging to the group of sterically hindered phenols having formula (II).
Claims11
Liquid stabilizing mixtures for organic polymers comprising:
- (a) a liquid compound belonging to the group of sterically hindered phenols consisting of esters or mixtures of esters having general formula (I):
- 7
- wherein:
- R1 and R2, the same or different, represent a linear or branched C1-C18 alkyl group;
- R3 represents a linear or branched C8-C18 alkyl group, or one of the following groups:
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- CH3—(CH2)p—CH2—;
- wherein m and n are an integer ranging from 0 to 11, extremes included;
- and m+n is 10 or 11;
- and p is 12 or 13;
- (b) a solid compound belonging to the group of sterically hindered phenols having formula
- 9
- wherein n is an integer ranging from 0 to 10, extremes included.
A process for the preparation of the above liquid stabilizing mixtures which comprises:
- (a′) heating the liquid compound belonging to the group of sterically hindered phenols (a) to a temperature ranging from 60° C. to 180° C., under stirring;
- (b′) adding the solid compound belonging to the group of sterically hindered phenols (b), maintaining the temperature within the range of 60° C. to 180° C., and maintaining the whole mixture under stirring until the complete dissolution of said compound (b), for a time ranging from 5 minutes to 100 minutes, obtaining a liquid mixture.
Polymeric compositions containing an organic polymer and an effective quantity of one of the stabilizing mixtures according to any of the previous claims.
End-products obtained from the processing of the polymeric compositions according to any of the claims from 6 to 9.
A method for stabilizing organic polymers against degradation caused by oxygen, heat and/or light, which comprises the addition to said organic polymers of the stabilizing mixtures according to any of the claims from 1 to 5.
Dependencies are inferred from the claim text.