Tokuyama Sekisui Co.

Yamaguchi-shi, Japan

Tokuyama Sekisui Co.

Yamaguchi-shi, Japan
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Patent
Sekisui Chemical Co. and Tokuyama Sekisui Co. | Date: 2017-05-31

The present invention provides a resin composition for molding that allows production of a molded body having excellent thermal stability as well as high flexibility and strength, without using heavy metals such as lead and tin, and also provides a molded body obtained using the resin composition for molding. The present invention provides a resin composition for molding, including a chlorinated polyvinyl chloride and a thermal stabilizer, the chlorinated polyvinyl chloride having structural units (a) to (c) represented by formulae (a) to (c) shown below:-CCl_(2)-(a),-CHCl-(b),-CH_(2)-(c),the proportion of the structural unit (a) being 17.5 mol% or less, the proportion of the structural unit (b) being 46.0 mol% or more, and the proportion of the structural unit (c) being 37.0 mol% or less, relative to the total number of moles of the structural units (a), (b), and (c), the chlorinated polyvinyl chloride having a chlorine content of 63 mass% or more and less than 72 mass%, the thermal stabilizer containing a calcium alkyl carboxylate and a zinc compound, and the resin composition for molding having a loss in quantity on heating at 230C of less than 2 mass%.


Patent
Sekisui Chemical Co. and Tokuyama Sekisui Co. | Date: 2017-02-08

The present invention provides a method for producing a chlorinated polyvinyl chloride which is excellent in thermal stability (initial discoloration resistance, heat-resistant stability) and is capable of providing a transparent article. The present invention relates to a method for producing a chlorinated polyvinyl chloride through thermal chlorination of a reaction solution including a vinyl chloride aqueous suspension that contains a vinyl chloride resin in a hermetically sealable reaction vessel, the method including: step 1 of initiating thermal chlorination by heating the reaction solution to 55C to 70C and then introducing chlorine into the reaction vessel; step 2 of raising the temperature of the reaction solution while maintaining the temperature inside the reaction vessel not higher than the glass transition temperature of a partially chlorinated polyvinyl chloride; and step 3 of carrying out the thermal chlorination at a predetermined temperature of 85C or higher but lower than 115C after the chlorine content of the partially chlorinated polyvinyl chloride reaches 58% by weight or more, the steps 1 to 3 being performed under stirring at a net stirring power (Pv) inside the reaction vessel of 0.2 to 2.5 kw/m^(3) per 1 m^(3) of the reaction solution.


Patent
Sekisui Chemical Co. and Tokuyama Sekisui Co. | Date: 2016-10-13

The present invention aims to provide a chlorinated vinyl chloride-based resin composition with excellent thermal stability and a molded body thereof. The present invention relates to a resin composition for molding, including a chlorinated vinyl chloride-based resin, a thermal stabilizer, and a polyalcohol and/or a partial ester of a polyalcohol. The chlorinated vinyl chloride-based resin has a chlorine content of 65% by weight or more and less than 72% by weight. The chlorinated vinyl chloride-based resin has, based on the total number of moles of a structural unit (a) CCl_(2), a structural unit (b) CHCl, and a structural unit (c) CH_(2), a proportion of the structural unit (a) of 17.5 mol % or less, a proportion of the structural unit (b) of 46.0 mol % or more, and a proportion of the structural unit (c) of 37.0 mol % or less. The thermal stabilizer contains at least one of a compound represented by the formula Ca_(1-x)Zn_(x )(OH)_(2 )where x satisfies the inequality 0


Patent
Sekisui Chemical Co. and Tokuyama Sekisui Co. | Date: 2016-10-13

The present invention aims to provide a chlorinated vinyl chloride-based resin composition with excellent thermal stability and a molded body thereof. The present invention relates to a resin composition for molding, including a chlorinated vinyl chloride-based resin, a thermal stabilizer, and a polyalcohol and/or a partial ester of a polyalcohol. The chlorinated vinyl chloride-based resin has a chlorine content of 65% by weight or more and less than 72% by weight. The chlorinated vinyl chloride-based resin has, based on the total number of moles of a structural unit (a) CCl_(2), a structural unit (b) CHCl, and a structural unit (c) CH_(2), a proportion of the structural unit (a) of 17.5 mol % or less, a proportion of the structural unit (b) of 46.0 mol % or more, and a proportion of the structural unit (c) of 37.0 mol % or less. The thermal stabilizer contains at least one of a compound represented by the formula Ca_(1-x)Mg_(x)(OH)_(2 )where x satisfies the inequality 0


Patent
Sekisui Chemical Co. and Tokuyama Sekisui Co. | Date: 2015-07-23

The present invention provides a resin composition for molding that allows production of a molded body having excellent thermal stability as well as high flexibility and strength, without using heavy metals such as lead and tin, and also provides a molded body obtained using the resin composition for molding. The present invention provides a resin composition for molding, including a chlorinated polyvinyl chloride and a thermal stabilizer, the chlorinated polyvinyl chloride having structural units (a) to (c) represented by formulae (a) to (c) shown below: CCl_(2)(a), CHCl(b), CH_(2)(c),


Patent
Sekisui Chemical Co., Tokuyama Sekisui Co. and Sekisui Chemical Hokkaido Co. | Date: 2014-10-08

[Problem] To provide a thermally expandable multilayer packing for building material, said thermally expandable multilayer packing exhibiting excellent surface appearance and fire resistance and admitting of free control of functions such as water tightness, air tightness and mechanical strength. [Solution] A thermally expandable multilayer packing for building material, having protruding parts and a body portion in the cross-sectional shape based a plane perpendicular to the longitudinal direction. The thermally expandable multilayer packing comprises both a thermally expandable resin composition layer and a thermoplastic resin composition layer as the essentials, wherein the thermally expandable resin composition forming the thermally expandable resin composition layer comprises 100 parts by weight of a resin component comprising a chlorinated polyvinyl chloride resin and/or an EPDM, 3 to 300 parts by weight of a thermally expandable graphite, 3 to 200 parts by weight of an inorganic filler and 20 to 200 parts by weight of a plasticizer. The thermally expandable resin composition layer and the thermoplastic resin composition layer are formed by simultaneous co-extrusion using the thermally expandable resin composition and the thermoplastic resin composition.


Patent
Sekisui Chemical Co. and Tokuyama Sekisui Co. | Date: 2016-08-03

The present invention aims to provide a chlorinated vinyl chloride-based resin composition with excellent thermal stability and a molded body thereof. The present invention relates to a resin composition for molding, including a chlorinated vinyl chloride-based resin, a thermal stabilizer, and a polyalcohol and/or a partial ester of a polyalcohol. The chlorinated vinyl chloride-based resin has a chlorine content of 65% by weight or more and less than 72% by weight. The chlorinated vinyl chloride-based resin has, based on the total number of moles of a structural unit (a) -CCl_(2) a structural unit (b) -CHCl-, and a structural unit (c) -CH_(2)-, a proportion of the structural unit (a) of 17.5 mol% or less, a proportion of the structural unit (b) of 4 6. 0 mol% or more, and a proportion of the structural unit (c) of 37.0 mol% or less. The thermal stabilizer contains at least one of a compound represented by the formula Ca_(1-x)Zn_(x)(OH)_(2) where x satisfies the inequality 0 < x < 1 and a compound represented by the formula Ca_(1-y)Zn_(y)O where y satisfies the inequality 0 < y < 1.


Patent
Sekisui Chemical Co. and Tokuyama Sekisui Co. | Date: 2015-03-31

The present invention provides a method for producing a chlorinated polyvinyl chloride which is excellent in thermal stability (initial discoloration resistance, heat-resistant stability) and is capable of providing a transparent article. The present invention relates to a method for producing a chlorinated polyvinyl chloride through thermal chlorination of a reaction solution including a vinyl chloride aqueous suspension that contains a vinyl chloride resin in a hermetically sealable reaction vessel, the method including: step 1 of initiating thermal chlorination by heating the reaction solution to 55 C. to 70 C. and then introducing chlorine into the reaction vessel; step 2 of raising the temperature of the reaction solution while maintaining the temperature inside the reaction vessel not higher than the glass transition temperature of a partially chlorinated polyvinyl chloride; and step 3 of carrying out the thermal chlorination at a predetermined temperature of 85 C. or higher but lower than 115 C. after the chlorine content of the partially chlorinated polyvinyl chloride reaches 58% by weight or more, the steps 1 to 3 being performed under stirring at a net stirring power (Pv) inside the reaction vessel of 0.2 to 2.5 kw/m^(3 )per 1 m^(3 )of the reaction solution.


Patent
Sekisui Chemical Co. and Tokuyama Sekisui Co. | Date: 2016-08-03

The present invention aims to provide a chlorinated vinyl chloride-based resin composition with excellent thermal stability and a molded body thereof. The present invention relates to a resin composition for molding, including a chlorinated vinyl chloride-based resin, a thermal stabilizer, and a polyalcohol and/or a partial ester of a polyalcohol. The chlorinated vinyl chloride-based resin has a chlorine content of 65% by weight or more and less than 72% by weight. The chlorinated vinyl chloride-based resin has, based on the total number of moles of a structural unit (a) -CCl_(2)-, a structural unit (b) -CHCl-, and a structural unit (c) -CH_(2)-, a proportion of the structural unit (a) of 17.5 mol% or less, a proportion of the structural unit (b) of 46. 0 mol% or more, and a proportion of the structural unit (c) of 37.0 mol% or less. The thermal stabilizer contains at least one of a compound represented by the formula Ca_(1-x)Mg_(x)(OH)_(2) where x satisfies the inequality 0 < x < 1 and a compound represented by the formula Ca_(1-y)Mg_(y)O where y satisfies the inequality 0 < y < 1.


Patent
Sekisui Chemical Co. and Tokuyama Sekisui Co. | Date: 2014-09-26

The present invention aims to provide a chlorinated vinyl chloride-based resin composition with excellent thermal stability and a molded body thereof. The present invention relates to a resin composition for molding, including a chlorinated vinyl chloride-based resin, a thermal stabilizer, and a polyalcohol and/or a partial ester of a polyalcohol. The chlorinated vinyl chloride-based resin has a chlorine content of 65% by weight or more and less than 72% by weight. The chlorinated vinyl chloride-based resin has, based on the total number of moles of a structural unit (a) CCl_(2), a structural unit (b) CHCl, and a structural unit (c) CH_(2), a proportion of the structural unit (a) of 17.5 mol % or less, a proportion of the structural unit (b) of 46.0 mol % or more, and a proportion of the structural unit (c) of 37.0 mol % or less. The thermal stabilizer contains at least one of a compound represented by the formula Ca_(1-x)Mg_(x)(OH)_(2 )where x satisfies the inequality 0

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