Polaymide moulding compounds for producing optical lenses

Polaymide moulding compounds for producing optical lenses

  • CN 1,507,466 A
  • Filed: 04/18/2002
  • Published: 06/23/2004
  • Est. Priority Date: 05/08/2001
  • Status: Active Grant
First Claim
Patent Images

1. transparent thermoplastic polyamide molding material based on copolyamide, refractive index n D20Surpass 1.59, preferably surpass 1.6, main component is diamines and the dicarboxylic acid that has aromatic proton, it is characterized in that the chain shown in the general formula I is arranged:

  • -{IPS-NH-R 1-NH} n1-{TPS-NH-R 2-NH} n2-{CO-R 3-NH} n3??(I) Wherein, n 1=40~

    100wt% n 2

    60~

    0wt%

    n 3=0~

    30wt%, and n 1, n 2, n 3Part by weight (wt%) summation be 100%;

    Have nuclear R 1And R 2Diamines can be identical or different, with respect in the 100mol% diamines at least the diamines of 30mol% be by xylylene or methyl one xylylene unit are constituted, and by CH with 2-12 2The aliphatic chain of unitary linear aliphatic chain or side chain, perhaps have single or mix the cycloaliphatic nuclear chain that comprises and constitute, comprise in the dicarboxylic acid of 100mol% at least the isophthalic acid of 40mol% (IPS) and, as residue, the terephthalic acid that can partly or entirely be replaced by naphthalene dicarboxylic acids, the copolyamide up to 30wt% of molding compounds can or have nuclear R by amino acid 3Lactan replace above-mentioned R 3Comprise 5-11 CH 2Unitary chain.

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