(FR2765231-A1)      Formulation for directly obtaining expanded, machined or laminated sheets comprises (A) at least one matrix polymer selected from polyvinyl chlorides obtained by polymerisation in bulk or suspension with K value = 50-90, and viscosity (ISO R 174) = 60-200 cm3g-1; and (B) at least one expansion agent made up polymeric microspheres containing liquid or expandable gas.    Also claimed are method for making expanded sheet; and expanded sheets made by said method.    Preferably (A) has K value = 57-65. Microspheres making up (B) are made from thermoplastic polymer and filled with isopentane; the thermoplastic being an acrylic. Microspheres have initial diameter of 9-17 m which increases to 40-60m on heating to 80-220C. The composition comprises 100 pts. wt. (A), 3-15 pts. (B), 0.5-6 pts. wt stabiliser (C) selected from e.g. calcium/zinc stabilisers, and tin thioglycolate, 0.1-3 pts. wt. lubricant (D) e.g. glycerol monooleate, 0.0001-5 pts. wt. pigment (E) e.g. titanium dioxide, up to 100 pts. wt. agent (F) of similar nature to (A), and 10-50 pts. wt. plasticiser (G) e.g. adipic acid, butyloctylphthalate, or n-octyl trimellitate.    USE -   For making expanded polymer sheets (claimed) which are used in decoration and packaging.    ADVANTAGE -   Product is obtained directly, and gelification stage in its manufacture can be repeated if necessary (claimed).    (JP11080417-A)      Formulation for directly obtaining expanded, machined or laminated sheets comprises (A) at least one matrix polymer selected from polyvinyl chlorides obtained by polymerisation in bulk or suspension with K value = 50-90, and viscosity (ISO R 174) = 60-200 cm3g-1; and (B) at least one expansion agent made up polymeric microspheres containing liquid or expandable gas.    Also claimed are method for making expanded sheet; and expanded sheets made by said method.    Preferably (A) has K value = 57-65. Microspheres making up (B) are made from thermoplastic polymer and filled with isopentane; the thermoplastic being an acrylic. Microspheres have initial diameter of 9-17 m which increases to 40-60m on heating to 80-220C. The composition comprises 100 pts. wt. (A), 3-15 pts. (B), 0.5-6 pts. wt stabiliser (C) selected from e.g. calcium/zinc stabilisers, and tin thioglycolate, 0.1-3 pts. wt. lubricant (D) e.g. glycerol monooleate, 0.0001-5 pts. wt. pigment (E) e.g. titanium dioxide, up to 100 pts. wt. agent (F) of similar nature to (A), and 10-50 pts. wt. plasticiser (G) e.g. adipic acid, butyloctylphthalate, or n-octyl trimellitate.    USE -   For making expanded polymer sheets (claimed) which are used in decoration and packaging.    ADVANTAGE -   Product is obtained directly, and gelification stage in its manufacture can be repeated if necessary (claimed).    (JP3058410-B2)      Formulation for directly obtaining expanded, machined or laminated sheets comprises (A) at least one matrix polymer selected from polyvinyl chlorides obtained by polymerisation in bulk or suspension with K value = 50-90, and viscosity (ISO R 174) = 60-200 cm3g-1; and (B) at least one expansion agent made up polymeric microspheres containing liquid or expandable gas.    Also claimed are method for making expanded sheet; and expanded sheets made by said method.    Preferably (A) has K value = 57-65. Microspheres making up (B) are made from thermoplastic polymer and filled with isopentane; the thermoplastic being an acrylic. Microspheres have initial diameter of 9-17 m which increases to 40-60m on heating to 80-220C. The composition comprises 100 pts. wt. (A), 3-15 pts. (B), 0.5-6 pts. wt stabiliser (C) selected from e.g. calcium/zinc stabilisers, and tin thioglycolate, 0.1-3 pts. wt. lubricant (D) e.g. glycerol monooleate, 0.0001-5 pts. wt. pigment (E) e.g. titanium dioxide, up to 100 pts. wt. agent (F) of similar nature to (A), and 10-50 pts. wt. plasticiser (G) e.g. adipic acid, butyloctylphthalate, or n-octyl trimellitate.    USE -   For making expanded polymer sheets (claimed) which are used in decoration and packaging.    ADVANTAGE -   Product is obtained directly, and gelification stage in its manufacture can be repeated if necessary (claimed).