Iron phosphotungstate flame-retardant smoke-suppressing semi-hard PVC sheet and preparation method thereof

Abstract

The invention discloses an iron phosphotungstate flame-retardant smoke-suppressing semi-hard PVC sheet and a preparation method thereof. The PVC sheet comprises the following components: PVC resin powder, a stabilizer, a lubricant, a plasticizer and a flame-retardant smoke-suppressing agent. The flame-retardant smoke suppressant is a compound containing four elements of iron, phosphorus, tungstenand oxygen, wherein the phosphorus element can be used as a gas source and an acid source of the intumescent flame retardant, and has a remarkable flame retardant effect; the iron and tungsten can react with HCl to form strong Lewis acid, and trans-conjugated polyene, hydrogen chloride and chloride are generated through catalytic reaction, so that a smoke suppression effect is achieved; and meanwhile, the tungsten element also has a promoting effect on the flame-retardant effect of nitrogen and phosphorus, so that the problem that the personal safety is endangered due to the fact that a largeamount of harmful smoke is generated during combustion of the PVC sheet is solved; therefore, the application range of the PVC sheet is widened, and further popularization and application of the PVC sheet in the field of buildings are facilitated.

Description

technical field

[0001] The invention relates to a flame-retardant and smoke-suppressing semi-rigid PVC sheet made of ferric phosphotungstate and a preparation method thereof. Background technique

[0002] Polyvinyl chloride (PVC) is one of the five major synthetic thermoplastics, and has become the second largest general-purpose plastic in the world after polyethylene, and PVC is mainly hard products. Therefore, PVC sheets are widely used in furniture, building materials, and decoration industries, and are developing at a relatively fast speed. However, PVC sheets will produce a lot of smoke during the combustion process, which will cause greater casualties in the event of a fire, which limits its application in building materials and decorative materials. Therefore, improving the flame retardancy and smoke suppression of PVC sheets is the development of PVC sheets. It is the key to application and helps to promote its application in related industries.

[0003] At present...

Examples

Embodiment 1

[0031] This example is to prepare a semi-rigid PVC sheet made of iron phosphotungstate for flame retardancy and smoke suppression. Specific steps are as follows:

[0032] (1) Heating and stirring: Take 100 parts by weight of PVC resin powder, 2 parts of rare earth composite heat stabilizer, 0.2 part of lubricant polyethylene wax, 15 parts of plasticizer dioctyl phthalate, iron phosphotungstate 2 parts of flame suppressant; first put in PVC resin powder, let the PVC resin take off the water first, and at the same time open the skin pores on the surface, add stabilizer and plasticizer at this time to achieve better absorption effect; then add stabilizer and Plasticizer, after the plasticizer fully swells PVC, add lubricant and flame retardant and smoke suppressant on this basis; it can make them easier to attach to PVC particles. The heating and stirring is that after the PVC resin powder is added into the high-speed mixer, it starts to stir while heating, the heating rate is 1...

Embodiment 2

[0037] This example also prepares a semi-rigid PVC sheet with iron phosphotungstate for flame retardancy and smoke suppression. The steps are the same as in Example 1, except that the components of the PVC sheet prepared in this example include by weight: 100 parts of PVC resin powder, 3 parts of rare earth composite heat stabilizer, and 0.4 part of lubricant polyethylene wax , 13 parts of plasticizer dioctyl phthalate, 6 parts of ferric phosphotungstate flame retardant and smoke suppressant.

Embodiment 3

[0039]This example is also to prepare a semi-rigid PVC sheet of iron phosphotungstate flame retardant and smoke suppression. Its steps are also the same as in Example 1. Each component of the PVC sheet prepared in this embodiment comprises by weight: 100 parts of PVC resin powder, 4 parts of rare earth composite heat stabilizer, 0.6 part of lubricant polyethylene wax, plasticizer dioctyl phthalate 11 parts, 8 parts of ferric phosphotungstate flame retardant and smoke suppressant.

technical field

[0001] The invention relates to a flame-retardant and smoke-suppressing semi-rigid PVC sheet made of ferric phosphotungstate and a preparation method thereof. Background technique

[0002] Polyvinyl chloride (PVC) is one of the five major synthetic thermoplastics, and has become the second largest general-purpose plastic in the world after polyethylene, and PVC is mainly hard products. Therefore, PVC sheets are widely used in furniture, building materials, and decoration industries, and are developing at a relatively fast speed. However, PVC sheets will produce a lot of smoke during the combustion process, which will cause greater casualties in the event of a fire, which limits its application in building materials and decorative materials. Therefore, improving the flame retardancy and smoke suppression of PVC sheets is the development of PVC sheets. It is the key to application and helps to promote its application in related industries.

[0003] At present...

Examples

Embodiment 1

[0031] This example is to prepare a semi-rigid PVC sheet made of iron phosphotungstate for flame retardancy and smoke suppression. Specific steps are as follows:

[0032] (1) Heating and stirring: Take 100 parts by weight of PVC resin powder, 2 parts of rare earth composite heat stabilizer, 0.2 part of lubricant polyethylene wax, 15 parts of plasticizer dioctyl phthalate, iron phosphotungstate 2 parts of flame suppressant; first put in PVC resin powder, let the PVC resin take off the water first, and at the same time open the skin pores on the surface, add stabilizer and plasticizer at this time to achieve better absorption effect; then add stabilizer and Plasticizer, after the plasticizer fully swells PVC, add lubricant and flame retardant and smoke suppressant on this basis; it can make them easier to attach to PVC particles. The heating and stirring is that after the PVC resin powder is added into the high-speed mixer, it starts to stir while heating, the heating rate is 1...

Embodiment 2

[0037] This example also prepares a semi-rigid PVC sheet with iron phosphotungstate for flame retardancy and smoke suppression. The steps are the same as in Example 1, except that the components of the PVC sheet prepared in this example include by weight: 100 parts of PVC resin powder, 3 parts of rare earth composite heat stabilizer, and 0.4 part of lubricant polyethylene wax , 13 parts of plasticizer dioctyl phthalate, 6 parts of ferric phosphotungstate flame retardant and smoke suppressant.

Embodiment 3

[0039]This example is also to prepare a semi-rigid PVC sheet of iron phosphotungstate flame retardant and smoke suppression. Its steps are also the same as in Example 1. Each component of the PVC sheet prepared in this embodiment comprises by weight: 100 parts of PVC resin powder, 4 parts of rare earth composite heat stabilizer, 0.6 part of lubricant polyethylene wax, plasticizer dioctyl phthalate 11 parts, 8 parts of ferric phosphotungstate flame retardant and smoke suppressant.