Stable polychloroprene latex
AssigneeDenka Chemical Corporation
InventorKenneth D. Fitzgerald
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Abstract
An aqueous latex having good colloidal stability against coagulation upon the addition of ionic material is made by polymerizing (1) an aqueous suspension of chloroprene monomer containing about 0.5 to 5.0 parts of alpha, beta-unsaturated carboxylic acid monomer, based on total monomer, in the presence of 2-6 parts by weight of a protective colloid containing 0.1 to 6 parts by weight hydroxyethyl cellulose and from 0 to 2.9 parts by weight of polyvinyl alcohol.
Claims22
A process for preparing latex compositions comprising polymerizing a carboxylic acid soap-free aqueous suspension of chloroprene monomer containing about 0.5 to 5.0 parts by weight of an alpha, beta unsaturated carboxylic acid monomer based on the total weight of monomer, in the presence of (a) 2 to 6 parts by weight of a protective colloid containing 0.1 to 6 parts by weight hydroxyalkyl cellulose and from 0 to 2.9 parts by weight of polyvinyl alcohol and (b) 0.5 to 2 parts by weight of an organic sulfur containing chain transfer agent selected from the group consisting of alkyl mercaptans and compounds having the general structure:
- ##STR4## wherein R is a hydrocarbon radical having 1 to 8 carbon atoms and n is 2 to 6, (a) and (b) being in parts by weight based on 100 parts of monomer.
Dependencies are inferred from the claim text.