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US 6,605,649 B2Granted
Method of production of whitened polyvinyl chloride foam
AssigneeOccidental Chemical Corporation
InventorsMichael T. Moran, Thomas E. Moses, Sherry Rohn Clancy
Life of this patent
Estimating the term…
Abstract
Polyvinyl chloride resin compositions and methods of preparation and use thereof for increasing the degree of whiteness in finished polyvinyl chloride foam. The resin compositions contain sulfur compounds selected from sulfonic acid derivatives, sulfinic acid derivatives, and mercapto acetic acid sodium salt, and optionally contain water soluble salts and/or t-butyl hydroperoxide.
Claims13
A method for producing a whitened polyvinyl chloride foam, the method comprising the steps of:
- (A) incorporating in a plastisol containing dry, particulate polyvinyl chloride dispersion resin;
- (a) from about 0.01 to about 5 parts by weight per hundred parts by weight of said dry, particulate polyvinyl chloride dispersion resin of at least one first additive selected from the group consisting of:
- i) a sulfonic acid derivative having the formula R—SO3M wherein R is an alkyl, alkylaryl or an arylalkyl group containing from 1 to 12 carbon atoms and wherein M is selected from hydrogen and monovalent metals;
- ii) a sulfinic acid derivative having the formula R—SO2M wherein R is an alkyl, alkylaryl or an arylalkyl group consisting from 1 to 12 carbon atoms and wherein M is selected from the group consisting of hydrogen and monovalent metals;
- and
- iii) mercapto acetic acid sodium salt;
- (b) and optionally incorporating at least one second additive selected from the group consisting of
- i) at least one water soluble metal salt selected from the group consisting of water soluble salts of alkali metals, alkaline-earth metals and transition metals;
- and
- ii) t-butyl hydroperoxide;
- and
- (B) heating the plastisol to effect expansion into whitened polyvinyl chloride foam.
9 more elements
A method for producing a whitened polyvinyl chloride foam, the method comprising the steps of:
- (A) incorporating in a plastisol containing dry, particulate polyvinyl chloride dispersion resin;
- (a) from about 0.01 to about 5 parts by weight per hundred parts by weight of said dry, particulate polyvinyl chloride dispersion resin of at least one first additive selected from the group consisting of:
- i) a sulfonic acid derivative having the formula R—SO3M wherein R is an alkyl, alkylaryl or an arylalkyl group containing from 1 to 12 carbon atoms and wherein R further comprises at least one functional group selected from the group consisting of a hydroxyl, a carboxyl, and combinations thereof and wherein M is selected from hydrogen and monovalent metals;
- ii) a sulfinic acid derivative having the formula R—SO2M wherein R is an alkyl, alkylaryl or an arylalkyl group consisting from 1 to 12 carbon atoms and wherein M is selected from the group consisting of hydrogen and monovalent metals;
- and
- iii) mercapto acetic acid sodium salt;
- (b) and optionally incorporating at least one second additive selected from the group consisting of
- i) at least one water soluble metal salt selected from the group consisting of water soluble salts of alkali metals, alkaline-earth metals and transition metals;
- and
- ii) t-butyl hydroperoxide;
- and
- (B) heating the plastisol to effect expansion into whitened polyvinyl chloride foam.
9 more elements
A method for producing a whitened polyvinyl chloride foam, the method comprising the steps of:
- (A) incorporating in a plastisol containing dry, particulate polyvinyl chloride dispersion resin;
- (a) from about 0.01 to about 5 parts by weight per hundred parts by weight of said dry, particulate polyvinyl chloride dispersion resin of at least one first additive selected from the group consisting of:
- i) a sulfonic acid derivative having the formula R—SO3M wherein R is an alkyl, alkylaryl or an arylalkyl group containing from 1 to 12 carbon atoms and wherein M is selected from hydrogen and monovalent metals;
- ii) a sulfinic acid derivative having the formula R—SO2M wherein R is an alkyl, alkylaryl or an arylalkyl group consisting from 1 to 12 carbon atoms and wherein R further comprises at least one functional group selected from the group consisting of a hydroxyl, a carboxyl, and combinations thereof and wherein M is selected from the group consisting of hydrogen and monovalent metals;
- and
- iii) mercapto acetic acid sodium salt;
- (b) and optionally incorporating at least one second additive selected from the group consisting of
- i) at least one water soluble metal salt selected from the group consisting of water soluble salts of alkali metals, alkaline-earth metals and transition metals;
- and
- ii) t-butyl hydroperoxide;
- and
- (B) heating the plastisol to effect expansion into whitened polyvinyl chloride foam.
9 more elements
Dependencies are inferred from the claim text.