Yamaguchi-shi, Japan
Yamaguchi-shi, Japan

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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: 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., 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: 2014-09-22

The present invention provides a thermally expandable microcapsule that has a high expansion ratio and durability at high temperatures, and is not likely to cause discoloration and odor when used for foam molding. The thermally expandable microcapsule of the present invention includes: a shell formed from a polymer; and a volatile expansion agent as a core agent encapsulated by the shell, the shell obtained by polymerizing a monomer composition that contains a nitrile monomer and a compound having a glycidyl group in a molecule, the shell exhibiting a value y of 50% or higher and a ratio y/x of 1.1 or higher, in which x represents a gel fraction at ordinary temperature, and y represents a gel fraction upon heating at 180 C. for 30 minutes.


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)Zn_(x)(OH)_(2 )where x satisfies the inequality 0


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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