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Functionalized particulate bicarbonate as blowing agent, foamable polymer composition containing it, and its use in manufacturing a thermoplastic foamed polymer

A bicarbonate and polymer technology, used in the field of foaming PVC and manufacturing thermoplastic foaming polymers, can solve the problem that non-azodicarbonamide foaming agent cannot meet the expected profile of a good foaming agent.

Pending Publication Date: 2019-03-15
SOLVAY SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0021] The non-azodicarbonamide blowing agents described above do not meet the desired profile of a good blowing agent, and improvements are needed in this regard

Method used

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  • Functionalized particulate bicarbonate as blowing agent, foamable polymer composition containing it, and its use in manufacturing a thermoplastic foamed polymer
  • Functionalized particulate bicarbonate as blowing agent, foamable polymer composition containing it, and its use in manufacturing a thermoplastic foamed polymer
  • Functionalized particulate bicarbonate as blowing agent, foamable polymer composition containing it, and its use in manufacturing a thermoplastic foamed polymer

Examples

Experimental program
Comparison scheme
Effect test

example

[0536] co-milling

[0537] in from Milling was carried out continuously in an UltraRotor III apparatus equipped with a classifier. The bottom of the mill was loaded with sodium bicarbonate granules from 10 to 300 kg / h under air injection at room temperature. Functionalizing additives are added at intermediate levels of the mill to achieve the desired weight level of functionalizing additives in the mixture. The mill rotation speed and classifier rotation speed are selected to achieve the desired particle size distribution.

[0538] extrude-mix

[0539] The extrusion-compounding process was carried out continuously in a UCP25 apparatus from the HASLER Group with entry points and paddles. Sodium bicarbonate pellets were loaded at the UCP25 entry point at from 1 to 2 kg / h. Functionalizing additives were loaded at from 0.1 to 1 kg / h a few centimeters behind the main entry point. The rotation speed of the paddle was 50 rpm. Keep the instrument temperature at room tempera...

example 1

[0564] Example 1 (not according to the invention)

example 2-4

[0566] Additive = Leucine (according to the invention)

[0567] Functionalized sodium bicarbonate was prepared by spray drying sodium bicarbonate with 1000 ppm leucine (as amino acid additive).

[0568] For Examples 2-4, PVC plastisol compositions were prepared by using functionalized sodium bicarbonate in powder form as a blowing agent. The functionalized sodium bicarbonate in powder form is mixed in the presence of at least one plasticizer, at least one polyvinyl chloride polymer and optionally one or more polymer additives such as inorganic fillers.

[0569] The PVC plastisol composition of Example 1 was prepared by using azodicarbonamide as a blowing agent. The other components of the plastisol of Example 1 were the same as those used in Examples 2-4.

[0570] The specific components and amounts as mentioned in Table 1 were selected.

[0571] In each instance, the components were dispensed on a high speed mixer and they were mixed and degassed under vacuum.

[0572] Th...

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Abstract

A chemical blowing agent for foaming a thermoplastic polymer, for example PVC plastisol or a polymer resin in an extrusion process, said chemical blowing agent comprising a functionalized particulatebicarbonate containing at least one additive, preferably excluding an exothermic blowing agent. The additive may be selected from the group consisting of polymers; inorganic salts; oils; fats; resin acids, any derivative thereof, and salts thereof; amino acids; fatty acids; carboxylic or polycarboxylic acids, soaps; waxes; derivatives thereof (such as esters); salts thereof; or any combinations thereof. The particulate bicarbonate may be functionalized by spray-drying, coating, extrusion or co-grinding with at least one additive. The functionalized particulate bicarbonate may comprise 50 wt% to less than 100 wt% of the bicarbonate component, and 0.02-50 wt% of the additive. A foamable polymer composition comprises such chemical blowing agent. A process for manufacturing a foamed polymer, such as foamed PVC, comprising shaping and heating the foamable polymer composition, and a foamed polymer obtained by such process.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to US Provisional Application No. 62 / 364843, filed July 20, 2016, which is hereby incorporated by reference in its entirety for all purposes. [0003] Statement Regarding Federally Sponsored Research or Development [0004] Not applicable. technical field [0005] The present invention relates to a functionalized particulate bicarbonate containing an additive. The invention also relates to a foamable composition, such as a PVC plastisol, containing it, and its use / process for the manufacture of thermoplastic foamed polymers, especially foamed PVC. Background technique [0006] Polymer foams are nearly ubiquitous in our modern world and are used in applications as diverse as single-use packaging for fast food, upholstery and insulation for furniture. [0007] Polymer foams consist of solid and gas phases that mix together to form the foam. By combining, these two phases rapidly lead ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/08C08K3/26
CPCC08J2203/02C08J2327/06C08J9/08C08J9/30C08K9/08C08J9/0061C08J3/226C08J9/0023C08J9/0028C08J2403/02C08J2405/00C08J2405/02C08J2427/06C08J2429/04C08J2433/10C08J2471/02C08J2491/06C08J2493/04C08L27/06C08L2203/14C08L2205/025C08L2310/00
Inventor K.卡瓦利耶J.A.凯巴比玛莱弗J-P.帕斯卡T.L.A.德图斯恩
Owner SOLVAY SA