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US 2006/0079622 A1Published application
Thermal stabilizer composition for halogen-containing vinyl polymers
OwnerGene Norrisinventor
Life of this patent
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Abstract
Stabilizer compositions are used to stabilize halogen-containing vinyl polymers from, for example, degradation and discoloration. The stabilizer compositions comprise a hydrotalcite; and a zinc mercaptide, a mixture of a mercaptan containing organic compound and a zinc carboxylate, or a combination comprising one or more of the foregoing stabilizers.
Claims10
A stabilized polymeric composition comprising a halogen-containing vinyl polymer and a stabilizer composition, the stabilizer composition comprising
- a hydrotalcite;
- and
- a zinc mercaptide, a mixture of a mercaptan-containing organic compound and a zinc carboxylate, or a mixture comprising one or more of the foregoing stabilizers, wherein
- the zinc mercaptide is a zinc mercaptoester of Formula 2:
- Zn[S(CH2)bC(═O)OR]2 (2)
- wherein each R is independently a hydrocarbyl group, and b is 1 or 2;
- a zinc mercaptoester of Formula 3:
- Zn[S(CHR′)c(CH2)dC(═O)OR″]2 (3)
- wherein c=0 or 1, d=1 or 2, each R′ is independently methyl or —C(═O)OR″, and each R″ is independently —[(CH2{C(R*)(R2*)}eCH2O)fR3*] where each R* is independently —H, C1-18 alkyl or C1-18 hydroxy-substituted alkyl, each R2* is —OH, C1-18 hydroxy-substituted alkyl, or —OC(═O)R4*, each R3* is —H or C1-18 alkyl, each R4* is alkyl or alkenyl, e=0 or 1, and f=1-4, with the proviso that when f is greater than 1, e=0;
- or
- a zinc mercaptoalkyl carboxylic acid ester of Formula 4:
- Zn[SCH2(CH2)gOC(═O)R5*]2, (4)
- wherein R5* is a C1-18 alkyl, C1-18 alkenyl, or C6-12 aryl group, and g=1-6, or
- a mixture comprising one or more of the foregoing zinc mercaptides.
11 more elements
A stabilizer composition comprising
- a hydrotalcite;
- and
- a zinc mercaptide, a mixture of a mercaptan-containing organic compound and a zinc carboxylate, or a mixture comprising one or more of the foregoing stabilizers, wherein
- the zinc mercaptide is a zinc mercaptoester of Formula 2:
- Zn[S(CH2)bC(═O)OR]2 (2)
- wherein each R is independently a hydrocarbyl group, and b is 1 or 2;
- a zinc mercaptoester of Formula 3:
- Zn[S(CHR′)c(CH2)dC(═O)OR″]2 (3)
- wherein c=0 or 1, d=1 or 2, each R′ is independently methyl or —C(═O)OR″, and each R″ is independently —[(CH2{C(R*)(R2*)}eCHfO)zR3*] where each R* is independently —H, C1-18 alkyl or C1-18 hydroxy-substituted alkyl, each R2* is —OH, C1-18 hydroxy-substituted alkyl, or —OC(═O)R4*, each R3* is —H or C1-18 alkyl, each R4* is alkyl or alkenyl, e=0 or 1, and f=1-4, with the proviso that when f is greater than 1, e=0;
- or
- a zinc mercaptoalkyl carboxylic acid ester of Formula 4:
- Zn[SCH2(CH2)gOC(═O)R5*]2, (4)
- wherein R5* is a C1-18 alkyl, C1-18 alkenyl, or C6-12 aryl group, and g=1-6, or a mixture comprising one or more or the foregoing zinc mercaptides.
10 more elements
Dependencies are inferred from the claim text.