The Dow Chemical Company

Mezzie L Ash

R Garth Pews

Do I Lee

Ashok C Makati

A process for preparing a structure reinforced latex particle whose film has improved tensile and elongation properties prepared by an emulsion polymerization comprising a three-stage monomer feed addition. The second monomer feed is an amount form about 5 to about 30 parts per hundred parts monomer in said latex particle and is a polymer of which would have a T.sub.g greater than either the first or third monomer feed. The subject structure reinforced latex particle provides A film having improved tensile properties without a corresponding reduction in elongation. A pressure sensitive adhesive formulated with the structure reinforced latex particle is also provided.

Structure reinforced latex particles

A process for preparing a structure reinforced latex particle whose film has improved tensile and elongation properties prepared by an emulsion polymerization comprising a three-stage monomer feed addition. The second monomer feed is an amount from about 5 to about 30 parts per hundred parts monomer in said latex particle and is a polymer of which would have a T.sub.g greater than either the first or third monomer feed. The subject structure reinforced latex particle provides a film having improved tensile properties without a corresponding reduction in elongation. A pressure sensitive adhesive formulated with the structure reinforced latex particle is also provided.

2-(Chloromethyl)pyridine is prepared by the reaction of 2-methylpyridine-N-oxide with phosgene (carbonyl chloride) in the presence of a solvent and an acid acceptor.

Preparation of 2-(Chloromethyl)pyridine

Monochloromethylpyridines are produced by reacting 2- or 4-methylpyridine oxides with phosphoryl chloride in the presence of an organic base. One product, 2-chloromethylpyridine, is formed by reacting 2-picoline-N-oxide with phosphoryl chloride in the presence of triethylamine.

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Midland, MI, United States of America

Mezzie L Ash