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Composite modified hard PVC sheet with high calcium carbonate content and preparation method thereof

A technology of compound modification and compound modifier, which is applied in the field of rigid PVC sheet and its preparation, can solve the problem that the compatibility between calcium carbonate and PVC molecular materials cannot be improved, and the heat resistance and wear resistance of the sheet cannot be improved. Dimensional stability and stiffness issues

Pending Publication Date: 2021-04-30
SUZHOU OCAN POLYMER MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these impact modifiers can only improve the toughness of rigid PVC sheets, but cannot improve the heat resistance, wear resistance, dimensional stability and rigidity of the sheets, nor can they improve calcium carbonate and PVC molecular materials. Compatibility

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] This embodiment is to prepare a kind of rigid PVC sheet with high content of composite modified calcium carbonate. Specific steps are as follows:

[0028] 1) Prepare raw materials: weigh 100 parts of PVC resin, 50 parts of calcium carbonate, 3 parts of acrylate core-shell polymer (AIM), 0.8 part of dual-core coupling agent (FT-16), heat stabilizer sulfur 2 parts of methyl tin alcohol, 1 part of plasticizer dioctyl terephthalate, 0.4 part of fatty acid ester, set aside.

[0029] 2) Hot mixing: each raw material weighed in step 1) is according to the PVC resin of 1 / 2 weight part→1 / 2 weight part of acrylic core-shell polymer→1 / 2 weight part of calcium carbonate→1 / 2 parts by weight of dual-core coupling agent → fatty acid ester, after mixing for 10 minutes, add → 1 / 2 part by weight of PVC resin → 1 / 2 part by weight of acrylate core-shell polymer → 1 / 2 part by weight of Calcium carbonate → 1 / 2 weight part of the dual-nuclear coupling agent → dioctyl terephthalate → mercap...

Embodiment 2

[0035] This embodiment also prepares a kind of rigid PVC sheet with high content of composite modified calcium carbonate. Specific steps are as follows:

[0036] 1) Prepare raw materials: Weigh 100 parts of PVC resin, 80 parts of calcium carbonate, 5 parts of AIM, 1.3 parts of FT-16, 2 parts of methyl tin mercaptide, 1 part of DOTP, and 0.5 parts of fatty acid ester by weight, and set aside.

[0037] 2) hot mixing: the PVC resin of each raw material 1 / 2 weight part that weighed in step 1)→1 / 2 weight part of acrylic ester core-shell polymer→1 / 2 weight part of calcium carbonate→1 / 2 weight part 2 parts by weight of dual-core coupling agent → fatty acid ester, after mixing for 15 minutes, add → 1 / 2 part by weight of PVC resin → 1 / 2 part by weight of acrylate core-shell polymer → 1 / 2 part by weight of carbonic acid Calcium → 1 / 2 weight part of the dual-nuclear coupling agent → dioctyl terephthalate → mercaptan methyl tin in the thermal mixer of the sequential input thermal mixing,...

Embodiment 3

[0043] This embodiment is also to prepare a kind of rigid PVC sheet with high content of composite modified calcium carbonate. Specific steps are as follows:

[0044] 1) Prepare raw materials: Weigh 80 parts of PVC resin, 30 parts of calcium carbonate, 8 parts of AIM, 2 parts of FT-16, 3 parts of methyl tin mercaptide, 2 parts of DOTP, and 0.2 parts of fatty acid ester by weight, and set aside.

[0045] 2) hot mixing: the PVC resin of each raw material 1 / 2 weight part that weighed in step 1)→1 / 2 weight part of acrylic ester core-shell polymer→1 / 2 weight part of calcium carbonate→1 / 2 weight part 2 parts by weight of dual-core coupling agent → fatty acid ester, after mixing for 20 minutes, add → 1 / 2 part by weight of PVC resin → 1 / 2 part by weight of acrylate core-shell polymer → 1 / 2 part by weight of carbonic acid Calcium → 1 / 2 weight part of the dual-nuclear coupling agent → dioctyl terephthalate → mercaptan methyl tin in the thermal mixer of the sequential input thermal mixi...

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Abstract

The invention discloses a composite modified hard PVC sheet with high calcium carbonate content and a preparation method thereof. The composite modified hard PVC sheet comprises the following components in parts by weight: 80-100 parts of PVC resin, 30-80 parts of calcium carbonate, 3.5-10 parts of a composite modifier, 1-3 parts of a heat stabilizer, 1-2 parts of a plasticizer and 0.1-0.6 part of fatty acid ester; wherein the composite modifier is composed of an acrylate core-shell polymer and a binuclear coupling agent according to a certain weight ratio. Through compounding of AIM and FT-16, toughening is achieved with less AIM, and meanwhile, the addition amount of calcium carbonate in the hard PVC sheet is increased through FT-16, so that the hard PVC sheet is easy to form. According to the invention, the hard PVC sheet provided by the invention has good toughness, weather resistance, processability and mechanical properties, solves the problems of great processing difficulty and influence on the mechanical properties of the material when the existing hard PVC sheet is modified and the addition amount of calcium is higher than 30%, and has good practical and economic values.

Description

technical field [0001] The invention relates to a rigid PVC sheet with high content of composite modified calcium carbonate and a preparation method thereof. Background technique [0002] my country is a big country in the production and use of plastics, among which polyvinyl chloride (PVC) occupies an important position in the plastics industry, and its annual output and consumption are second only to polyethylene, reaching more than 10 million tons. PVC has excellent properties such as low price, easy molding and printing, good moisture resistance and chemical resistance, and has been widely used in construction, automobile and packaging industries. Adding calcium carbonate to PVC is a general modification method, which can improve the heat resistance, wear resistance, dimensional stability and rigidity of the product, and reduce the cost of the product. However, calcium carbonate is an inorganic filler, which has hydrophilic and oleophobic surface characteristics, which ...

Claims

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Application Information

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IPC IPC(8): C08L27/06C08L33/04C08K13/06C08K9/04C08K3/26C08K5/12C08K5/58
CPCC08L27/06C08L2207/53C08K2003/265C08L2201/10C08L33/04C08K13/06C08K9/04C08K3/26C08K5/12C08K5/58
Inventor 马青赛朱山宝
Owner SUZHOU OCAN POLYMER MATERIAL CO LTD
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