| 摘要 |
1,165,130. Vulcanized cellular structures. POLYMER CORP. Ltd. 19 Jan., 1968 [3 Feb., 1967], No. 3039/68. Headings C3C and C3P. A cellular vulcanized structure is produced by forming a homogeneous mixture of (a) a major proportion by wt. of a liquid polymer of an olefinically unsaturated compound which is a pourable non-volatile polymer of mol wt. above 1000, has an intrinsic viscosity of not more than 1.0 dl./g. in toluene at 30‹ C. and the majority of whose molecules contain more than one allylic halide group, and (b) a minor proportion of a salt derived from an amine and either a haloacetic acid or carbon dioxide, and decomposing the salt whereby the mixture foams and vulcanizes to produce the cellular structure. The liquid polymer may be a polymer of butadiene-1,3 containing allylic bromide groups and prepared in Example (I) by polymerizing an aq. emulsion of butadiene, tetrabromomethane, sodium alkyl aryl sulphonate, tripotassium phosphate and potassium persulphate, coagulating the polymer and adding (2-nonyl-4-methyl) phenol as antioxidant. The salt may be derived from triethylene tetramine or N,N,N<SP>1</SP>,N<SP>2</SP>,N<SP>3</SP>,N<SP>3</SP> - hexamethyl triethylene tetramine and trichloroacetic acid or tribromoacetic acid. In Examples: (I) the liquid polymer and amine salt were mixed with a naphthenic and a silicone oil and heated to produce an open-cell vulcanized structure; (IV) as (I) using calcium carbonate, hydrated aluminium, calcium or magnesium silicate, or furnace black; (V) as (IV) using calcium carbonate and paraffin wax; and (VI) as (I) using amino hexamethylene carbamic acid as the salt |
