Search

CN-122011639-A - Anti-yellowing polyvinyl butyral resin and preparation method and application thereof

CN122011639ACN 122011639 ACN122011639 ACN 122011639ACN-122011639-A

Abstract

The invention relates to the technical field of high polymer materials, in particular to an anti-yellowing polyvinyl butyral resin and a preparation method and application thereof. The invention uses a specific ternary synergistic stabilizing system as a main stabilizing function source, generates a synergistic effect through accurate molecular combination construction and proportioning control, solves the problem of phenol yellowing from the aspect of a reaction mechanism, does not use a traditional hindered phenol antioxidant on one hand, radically eliminates the main chemical origin of yellowing, overcomes the defects of poor synergistic property and insufficient environmental adaptability of a non-phenol antioxidant system on the other hand, can well inhibit the phenomenon of phenol yellowing, obtains super-strong ultraviolet yellowing resistance, gas yellowing resistance and wet heat aging resistance, ensures good compatibility with glass, and has excellent long-term color stability and environmental adaptability and comprehensive performance balance.

Inventors

  • ZHU XIONGBING
  • WANG MENGDAN
  • ZHU FUHAI
  • YUAN HAIFENG

Assignees

  • 安徽亿年半导体有限公司

Dates

Publication Date
20260512
Application Date
20260225

Claims (10)

  1. 1. The anti-yellowing PVB resin is characterized by comprising the following components in parts by weight: 100 parts of PVB resin, 0.3-1.2 parts of bisphenol A bisphosphate antioxidant, 0.2-0.8 part of thiobisphenol antioxidant, 0.4-1.0 part of NOR-HALS, 0.2-1.0 part of ultraviolet absorbent, 30-40 parts of plasticizer and 0.01-0.1 part of alkaline earth metal fatty acid salt; the mass ratio of the bisphenol A bisphosphate antioxidant to the thiobisphenol antioxidant to the NOR-HALS is 100 (40-80): 50-100.
  2. 2. The anti-yellowing PVB resin of claim 1 wherein the bisphenol a bisphosphate antioxidant comprises one or more of bis 2, 4-di-tert-butylphenyl pentaerythritol diphosphite, PEP-36 antioxidant, and Irgafos 168 of basf; the thiobisphenol antioxidant comprises one or more of 4,4 '-thiobis (2-tertiary butyl-5-methylphenol), 2' -thiobis (4-tertiary octyl phenol) and 1790 antioxidants; The NOR-HALS comprises one or more of bis (1-octyloxy-2, 6-tetramethyl-4-piperidinyl) sebacate and Tinuvin NOR 371 of Basf.
  3. 3. The anti-yellowing PVB resin of claim 1 wherein the anti-yellowing PVB resin is free of hindered phenolic antioxidants.
  4. 4. The anti-yellowing PVB resin of claim 1, wherein the anti-yellowing PVB resin further comprises one or more of a phosphite antioxidant and a lactone antioxidant; the anti-yellowing PVB resin also comprises a light stabilizer, wherein the light stabilizer is one or more of bis (1-octyloxy-2, 6-tetramethyl-4-piperidinyl) sebacate and Tinuvin 123 of basf.
  5. 5. The anti-yellowing PVB resin of claim 1 wherein the total mass of bisphenol a bisphosphate antioxidant, thiobisphenol antioxidant, and NOR-HALS comprises greater than 90 weight percent of the total mass of all antioxidants and light stabilizers.
  6. 6. The method for preparing the anti-yellowing PVB resin according to any one of claims 1 to 5, which is characterized by comprising the following steps: Premixing a dry PVB resin with a plasticizer to obtain a premix, mixing the premix with a bisphenol A bisphosphate antioxidant, a thiobisphenol antioxidant, NOR-HALS and an ultraviolet absorber to obtain a blend, and mixing the blend with an alkaline earth metal fatty acid salt to obtain the anti-yellowing PVB resin.
  7. 7. The use of the anti-yellowing PVB resin of any one of claims 1-5 or the anti-yellowing PVB resin obtained by the preparation method of claim 6 in laminated glass.
  8. 8. A PVB film, wherein a raw material comprises the anti-yellowing PVB resin of any one of claims 1-5 or the anti-yellowing PVB resin obtained by the preparation method of claim 6.
  9. 9. The method of making PVB film of claim 8 comprising the steps of: Calendaring or casting an anti-yellowing PVB resin into a sheet, wherein the anti-yellowing PVB resin is an anti-yellowing PVB resin according to any one of claims 1-5 or an anti-yellowing PVB resin obtained by the preparation method according to claim 6, so as to obtain the PVB film.
  10. 10. A color fidelity type laminated glass, which is characterized by comprising a PVB film and glass plates coated on two sides of the PVB film, wherein the PVB film is the PVB film according to claim 8 or the PVB film obtained by the preparation method according to claim 9.

Description

Anti-yellowing polyvinyl butyral resin and preparation method and application thereof Technical Field The invention relates to the technical field of high polymer materials, in particular to an anti-yellowing polyvinyl butyral resin and a preparation method and application thereof. Background Polyvinyl butyral (PVB) film, which is used as a core material of laminated glass, has long-term optical stability, especially yellowing resistance, and is a key index for measuring the quality of the laminated glass. Conventional PVB films typically incorporate antioxidant systems based on hindered phenolic compounds (e.g., the Basf antioxidant Irganox 1010) to achieve aging resistance. However, hindered phenolic antioxidants have the inherent disadvantage that while they exhibit chain termination, the benzene ring in the molecular structure can undergo photooxidation reactions in the presence of ultraviolet radiation and/or nitrogen oxides (NO x) in the air to produce yellow or brown nitro/nitroso compounds such as quinone methides, which can lead to irreversible "phenolic yellowing" or "gas discoloration" of PVB, which is unacceptable in environments such as museums where absolute color fidelity is required. The skilled man has tried to use non-phenolic antioxidant systems to circumvent yellowing, for example chinese patent CN110128805A discloses the addition of phosphite and Hindered Amine Light Stabilizers (HALS) to PVB, but its long term uv ageing resistance is insufficient, the Yellowness Index (YI) increment (Δyi) after 2000 hours of uv ageing test (QUV) is usually above 5.0, document "polymer degradation and stabilization" (Polymer Degradation and Stability) reports the use of thio ester antioxidants, but its limited anti-gas yellowing effect, the b value increment (Δb) in CIE Lab chromaticity coordinates after NO x exposure is greater than 3.0. In summary, how to effectively solve the problem of phenolic yellowing of PVB is a problem to be solved in the art. Disclosure of Invention In view of the above, the invention provides an anti-yellowing PVB resin, a preparation method and application thereof. The invention provides anti-yellowing PVB resin which comprises the following components in parts by mass: 100 parts of PVB resin, 0.3-1.2 parts of bisphenol A bisphosphate antioxidant, 0.2-0.8 part of thiobisphenol antioxidant, 0.4-1.0 part of NOR-HALS, 0.2-1.0 part of ultraviolet absorber, 30-40 parts of plasticizer and 0.01-0.1 part of alkaline earth metal fatty acid salt, wherein the mass ratio of the bisphenol A bisphosphate antioxidant, the thiobisphenol antioxidant and the NOR-HALS is 100 (40-80) (50-100). Preferably, the bisphenol A bisphosphate antioxidant is a phosphate compound with a bisphenol A skeleton, and comprises one or more of bis 2, 4-di-tert-butylphenyl pentaerythritol diphosphite, PEP-36 antioxidant and Irgafos 168 of basf, the thiobisphenol antioxidant is an antioxidant with two phenol structures connected by a thioether bond in the molecule, the thiobisphenol antioxidant comprises one or more of 4,4 '-thiobis (2-tert-butyl-5-methylphenol), 2' -thiobis (4-tert-octylphenol) and 1790 antioxidant, and the NOR-HALS comprises one or more of bis (1-octyloxy-2, 6-tetramethyl-4-piperidinyl) sebacate and Tinuvin NOR 371 of basf. Preferably, the anti-yellowing PVB resin does not contain a hindered phenolic antioxidant. Preferably, the anti-yellowing PVB resin further comprises one or more of phosphite antioxidants and lactone antioxidants, and the anti-yellowing PVB resin further comprises a light stabilizer which is one or more of bis (1-octyloxy-2, 6-tetramethyl-4-piperidinyl) sebacate and Tinuvin 123 of basf. Preferably, the total mass of the bisphenol A bisphosphate antioxidant, the thiobisphenol antioxidant and the NOR-HALS accounts for more than 90 weight percent of the total mass of all antioxidants and light stabilizers. The invention also provides a preparation method of the anti-yellowing PVB resin, which comprises the following steps: Premixing a dry PVB resin with a plasticizer to obtain a premix, mixing the premix with a bisphenol A bisphosphate antioxidant, a thiobisphenol antioxidant, NOR-HALS and an ultraviolet absorber to obtain a blend, and mixing the blend with an alkaline earth metal fatty acid salt to obtain the anti-yellowing PVB resin. The invention also provides application of the anti-yellowing PVB resin obtained by the scheme or the preparation method of the anti-yellowing PVB resin in laminated glass. The invention also provides a PVB film, and the raw materials comprise the anti-yellowing PVB resin prepared by the scheme or the preparation method. The invention also provides a preparation method of the PVB film, which comprises the following steps: And calendaring or casting the anti-yellowing PVB resin into a sheet, wherein the anti-yellowing PVB resin is the anti-yellowing PVB resin obtained by the scheme or the preparation method of the scheme, and the PVB film is obtain