摘要:
A process for producing a styrene-base resin having improved moldability and a good hue by continuously adding a specific higher fatty acid amide in a dissolved or molten state, and/or a mixture of a specific higher fatty acid amide and a specific metallic soap in a molten state, to a styrene-base resin in the course of its production by continuous bulk or solution polymerization. The above process is particularly effective for rubber-modified styrene-acrylonitrile resins.
摘要:
A method of manufacturing rubber modified styrene resins comprises the steps of (a) polymerizing a styrene monomer in the presence of a polymer rubber comprising butadiene moieties and optionally an organic peroxide in the ratio of 100 parts by weight, 3 to 15 parts by weight and 0 to 0.01 parts by weight respectively until the polymerization yield of the styrene monomer becomes 2 to 5 times the original weight of the polymer rubber; and (b) polymerizing the full amount of polymer mixture from step (a) and 0 to 200 parts by weight of fresh styrene monomer in the presence of 0.01 to 0.9 parts by weight of organic peroxide until the polymerization yield of the styrene monomer specific to step (b) becomes at least 1.5 times the polymerization yield of the styrene monomer in step (a). The molded product of the resin thus obtained shows an improved impact strength at the portions where polystyrene molecule orientation tends to occur.
摘要:
A process for producing a styrene-base resin having improved moldability and a good hue by continuously adding a specific higher fatty acid amide in a dissolved or molten state, and/or a mixture of a specific higher fatty acid amide and a specific metallic soap in a molten state, to a styrene-base resin in the course of its production by continuous bulk or solution polymerization. The above process is particularly effective for rubber-modified styrene-acrylonitrile resins.
摘要:
A continuous treating process for a rubber modified styrenic polymer composition produced by bulk or solution polymerization and containing at least 1% by weight of a rubber component and at least 16% by weight of the total amount of an unreacted monomer and solvent is provided. The polymer composition is treated in a two stage volatile component separation apparatus each stage comprising a multi-tube preheater (4, 14) and a volatilizer (5,15) to remove the unreacted monomer and other volatile components (via lines 20, 25); in the first stage volatilizer (4, 5) the composition treated therein contains 3 - 15% by weight of the unreacted monomer and solvent, and in the second stage volatilizer (14, 15) voltaile components are further stripped from the composition reducing their contents to negligible levels.
摘要:
A continuous treating process for a rubber modified styrenic polymer composition produced by bulk or solution polymerization and containing at least 1% by weight of a rubber component and at least 16% by weight of the total amount of an unreacted monomer and solvent is provided. The polymer composition is treated in a two stage volatile component separation apparatus each stage comprising a multi-tube preheater (4, 14) and a volatilizer (5,15) to remove the unreacted monomer and other volatile components (via lines 20, 25); in the first stage volatilizer (4, 5) the composition treated therein contains 3 - 15% by weight of the unreacted monomer and solvent, and in the second stage volatilizer (14, 15) voltaile components are further stripped from the composition reducing their contents to negligible levels.